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| 5 | <!-- Generated by javadoc (build 1.6.0_07) on Tue Sep 01 20:56:54 UTC 2009 --> |
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| 6 | <TITLE> |
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| 7 | TFile.Reader.Scanner (Hadoop 0.20.1 API) |
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| 8 | </TITLE> |
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| 10 | <META NAME="date" CONTENT="2009-09-01"> |
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| 18 | parent.document.title="TFile.Reader.Scanner (Hadoop 0.20.1 API)"; |
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| 43 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/TFile.Reader.Scanner.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> |
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| 77 | <TR> |
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| 79 | SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> |
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| 80 | <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> |
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| 88 | <!-- ======== START OF CLASS DATA ======== --> |
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| 89 | <H2> |
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| 90 | <FONT SIZE="-1"> |
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| 91 | org.apache.hadoop.io.file.tfile</FONT> |
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| 92 | <BR> |
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| 93 | Class TFile.Reader.Scanner</H2> |
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| 94 | <PRE> |
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| 95 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
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| 96 | <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.io.file.tfile.TFile.Reader.Scanner</B> |
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| 97 | </PRE> |
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| 98 | <DL> |
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| 99 | <DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></DD> |
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| 100 | </DL> |
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| 101 | <DL> |
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| 102 | <DT><B>Enclosing class:</B><DD><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader</A></DD> |
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| 103 | </DL> |
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| 104 | <HR> |
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| 105 | <DL> |
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| 106 | <DT><PRE>public static class <B>TFile.Reader.Scanner</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></DL> |
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| 107 | </PRE> |
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| 108 | |
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| 109 | <P> |
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| 110 | The TFile Scanner. The Scanner has an implicit cursor, which, upon |
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| 111 | creation, points to the first key-value pair in the scan range. If the |
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| 112 | scan range is empty, the cursor will point to the end of the scan range. |
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| 113 | <p> |
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| 114 | Use <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#atEnd()"><CODE>atEnd()</CODE></A> to test whether the cursor is at the end |
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| 115 | location of the scanner. |
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| 116 | <p> |
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| 117 | Use <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#advance()"><CODE>advance()</CODE></A> to move the cursor to the next key-value |
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| 118 | pair (or end if none exists). Use seekTo methods ( |
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| 119 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#seekTo(byte[])"><CODE>seekTo(byte[])</CODE></A> or |
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| 120 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#seekTo(byte[], int, int)"><CODE>seekTo(byte[], int, int)</CODE></A>) to seek to any arbitrary |
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| 121 | location in the covered range (including backward seeking). Use |
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| 122 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#rewind()"><CODE>rewind()</CODE></A> to seek back to the beginning of the scanner. |
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| 123 | Use <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#seekToEnd()"><CODE>seekToEnd()</CODE></A> to seek to the end of the scanner. |
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| 124 | <p> |
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| 125 | Actual keys and values may be obtained through <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.Entry.html" title="class in org.apache.hadoop.io.file.tfile"><CODE>TFile.Reader.Scanner.Entry</CODE></A> |
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| 126 | object, which is obtained through <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#entry()"><CODE>entry()</CODE></A>. |
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| 127 | <P> |
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| 128 | |
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| 129 | <P> |
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| 130 | <HR> |
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| 131 | |
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| 132 | <P> |
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| 133 | <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| 134 | |
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| 135 | <A NAME="nested_class_summary"><!-- --></A> |
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| 136 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 137 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 138 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 139 | <B>Nested Class Summary</B></FONT></TH> |
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| 140 | </TR> |
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| 141 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 142 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 143 | <CODE> class</CODE></FONT></TD> |
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| 144 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.Entry.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader.Scanner.Entry</A></B></CODE> |
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| 145 | |
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| 146 | <BR> |
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| 147 | Entry to a <Key, Value> pair.</TD> |
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| 148 | </TR> |
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| 149 | </TABLE> |
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| 150 | |
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| 151 | <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| 152 | |
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| 153 | <A NAME="constructor_summary"><!-- --></A> |
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| 154 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 155 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 156 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 157 | <B>Constructor Summary</B></FONT></TH> |
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| 158 | </TR> |
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| 159 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 160 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 161 | <CODE>protected </CODE></FONT></TD> |
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| 162 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#TFile.Reader.Scanner(org.apache.hadoop.io.file.tfile.TFile.Reader, long, long)">TFile.Reader.Scanner</A></B>(<A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader</A> reader, |
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| 163 | long offBegin, |
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| 164 | long offEnd)</CODE> |
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| 165 | |
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| 166 | <BR> |
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| 167 | Constructor</TD> |
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| 168 | </TR> |
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| 169 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 170 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 171 | <CODE>protected </CODE></FONT></TD> |
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| 172 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#TFile.Reader.Scanner(org.apache.hadoop.io.file.tfile.TFile.Reader, org.apache.hadoop.io.file.tfile.RawComparable, org.apache.hadoop.io.file.tfile.RawComparable)">TFile.Reader.Scanner</A></B>(<A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader</A> reader, |
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| 173 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/RawComparable.html" title="interface in org.apache.hadoop.io.file.tfile">RawComparable</A> beginKey, |
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| 174 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/RawComparable.html" title="interface in org.apache.hadoop.io.file.tfile">RawComparable</A> endKey)</CODE> |
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| 175 | |
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| 176 | <BR> |
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| 177 | Constructor</TD> |
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| 178 | </TR> |
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| 179 | </TABLE> |
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| 180 | |
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| 181 | <!-- ========== METHOD SUMMARY =========== --> |
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| 182 | |
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| 183 | <A NAME="method_summary"><!-- --></A> |
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| 184 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 185 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 186 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 187 | <B>Method Summary</B></FONT></TH> |
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| 188 | </TR> |
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| 189 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 190 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 191 | <CODE> boolean</CODE></FONT></TD> |
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| 192 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#advance()">advance</A></B>()</CODE> |
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| 193 | |
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| 194 | <BR> |
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| 195 | Move the cursor to the next key-value pair.</TD> |
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| 196 | </TR> |
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| 197 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 198 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 199 | <CODE> boolean</CODE></FONT></TD> |
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| 200 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#atEnd()">atEnd</A></B>()</CODE> |
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| 201 | |
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| 202 | <BR> |
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| 203 | Is cursor at the end location?</TD> |
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| 204 | </TR> |
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| 205 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 206 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 207 | <CODE> void</CODE></FONT></TD> |
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| 208 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#close()">close</A></B>()</CODE> |
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| 209 | |
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| 210 | <BR> |
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| 211 | Close the scanner.</TD> |
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| 212 | </TR> |
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| 213 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 214 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 215 | <CODE> <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.Entry.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader.Scanner.Entry</A></CODE></FONT></TD> |
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| 216 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#entry()">entry</A></B>()</CODE> |
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| 217 | |
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| 218 | <BR> |
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| 219 | Get an entry to access the key and value.</TD> |
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| 220 | </TR> |
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| 221 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 222 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 223 | <CODE> void</CODE></FONT></TD> |
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| 224 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#lowerBound(byte[])">lowerBound</A></B>(byte[] key)</CODE> |
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| 225 | |
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| 226 | <BR> |
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| 227 | Move the cursor to the first entry whose key is greater than or equal |
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| 228 | to the input key.</TD> |
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| 229 | </TR> |
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| 230 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 231 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 232 | <CODE> void</CODE></FONT></TD> |
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| 233 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#lowerBound(byte[], int, int)">lowerBound</A></B>(byte[] key, |
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| 234 | int keyOffset, |
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| 235 | int keyLen)</CODE> |
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| 236 | |
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| 237 | <BR> |
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| 238 | Move the cursor to the first entry whose key is greater than or equal |
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| 239 | to the input key.</TD> |
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| 240 | </TR> |
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| 241 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 242 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 243 | <CODE> void</CODE></FONT></TD> |
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| 244 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#rewind()">rewind</A></B>()</CODE> |
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| 245 | |
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| 246 | <BR> |
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| 247 | Rewind to the first entry in the scanner.</TD> |
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| 248 | </TR> |
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| 249 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 250 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 251 | <CODE> boolean</CODE></FONT></TD> |
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| 252 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#seekTo(byte[])">seekTo</A></B>(byte[] key)</CODE> |
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| 253 | |
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| 254 | <BR> |
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| 255 | Move the cursor to the first entry whose key is greater than or equal |
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| 256 | to the input key.</TD> |
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| 257 | </TR> |
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| 258 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 259 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 260 | <CODE> boolean</CODE></FONT></TD> |
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| 261 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#seekTo(byte[], int, int)">seekTo</A></B>(byte[] key, |
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| 262 | int keyOffset, |
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| 263 | int keyLen)</CODE> |
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| 264 | |
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| 265 | <BR> |
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| 266 | Move the cursor to the first entry whose key is greater than or equal |
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| 267 | to the input key.</TD> |
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| 268 | </TR> |
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| 269 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 270 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 271 | <CODE> void</CODE></FONT></TD> |
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| 272 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#seekToEnd()">seekToEnd</A></B>()</CODE> |
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| 273 | |
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| 274 | <BR> |
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| 275 | Seek to the end of the scanner.</TD> |
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| 276 | </TR> |
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| 277 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 278 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 279 | <CODE> void</CODE></FONT></TD> |
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| 280 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#upperBound(byte[])">upperBound</A></B>(byte[] key)</CODE> |
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| 281 | |
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| 282 | <BR> |
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| 283 | Move the cursor to the first entry whose key is strictly greater than |
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| 284 | the input key.</TD> |
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| 285 | </TR> |
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| 286 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 287 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 288 | <CODE> void</CODE></FONT></TD> |
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| 289 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.html#upperBound(byte[], int, int)">upperBound</A></B>(byte[] key, |
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| 290 | int keyOffset, |
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| 291 | int keyLen)</CODE> |
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| 292 | |
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| 293 | <BR> |
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| 294 | Move the cursor to the first entry whose key is strictly greater than |
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| 295 | the input key.</TD> |
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| 296 | </TR> |
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| 297 | </TABLE> |
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| 298 | <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
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| 299 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 300 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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| 301 | <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
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| 302 | </TR> |
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| 303 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 304 | <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> |
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| 305 | </TR> |
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| 306 | </TABLE> |
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| 307 | |
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| 308 | <P> |
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| 309 | |
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| 310 | <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| 311 | |
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| 312 | <A NAME="constructor_detail"><!-- --></A> |
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| 313 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 314 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 315 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 316 | <B>Constructor Detail</B></FONT></TH> |
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| 317 | </TR> |
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| 318 | </TABLE> |
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| 319 | |
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| 320 | <A NAME="TFile.Reader.Scanner(org.apache.hadoop.io.file.tfile.TFile.Reader, long, long)"><!-- --></A><H3> |
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| 321 | TFile.Reader.Scanner</H3> |
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| 322 | <PRE> |
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| 323 | protected <B>TFile.Reader.Scanner</B>(<A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader</A> reader, |
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| 324 | long offBegin, |
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| 325 | long offEnd) |
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| 326 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 327 | <DL> |
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| 328 | <DD>Constructor |
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| 329 | <P> |
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| 330 | <DL> |
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| 331 | <DT><B>Parameters:</B><DD><CODE>reader</CODE> - The TFile reader object.<DD><CODE>offBegin</CODE> - Begin byte-offset of the scan.<DD><CODE>offEnd</CODE> - End byte-offset of the scan. |
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| 332 | <DT><B>Throws:</B> |
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| 333 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE> - The offsets will be rounded to the beginning of a compressed |
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| 334 | block whose offset is greater than or equal to the specified |
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| 335 | offset.</DL> |
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| 336 | </DL> |
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| 337 | <HR> |
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| 338 | |
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| 339 | <A NAME="TFile.Reader.Scanner(org.apache.hadoop.io.file.tfile.TFile.Reader, org.apache.hadoop.io.file.tfile.RawComparable, org.apache.hadoop.io.file.tfile.RawComparable)"><!-- --></A><H3> |
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| 340 | TFile.Reader.Scanner</H3> |
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| 341 | <PRE> |
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| 342 | protected <B>TFile.Reader.Scanner</B>(<A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader</A> reader, |
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| 343 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/RawComparable.html" title="interface in org.apache.hadoop.io.file.tfile">RawComparable</A> beginKey, |
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| 344 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/RawComparable.html" title="interface in org.apache.hadoop.io.file.tfile">RawComparable</A> endKey) |
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| 345 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 346 | <DL> |
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| 347 | <DD>Constructor |
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| 348 | <P> |
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| 349 | <DL> |
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| 350 | <DT><B>Parameters:</B><DD><CODE>reader</CODE> - The TFile reader object.<DD><CODE>beginKey</CODE> - Begin key of the scan. If null, scan from the first <K,V> |
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| 351 | entry of the TFile.<DD><CODE>endKey</CODE> - End key of the scan. If null, scan up to the last <K, V> entry |
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| 352 | of the TFile. |
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| 353 | <DT><B>Throws:</B> |
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| 354 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 355 | </DL> |
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| 356 | |
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| 357 | <!-- ============ METHOD DETAIL ========== --> |
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| 358 | |
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| 359 | <A NAME="method_detail"><!-- --></A> |
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| 360 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 361 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 362 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 363 | <B>Method Detail</B></FONT></TH> |
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| 364 | </TR> |
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| 365 | </TABLE> |
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| 366 | |
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| 367 | <A NAME="seekTo(byte[])"><!-- --></A><H3> |
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| 368 | seekTo</H3> |
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| 369 | <PRE> |
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| 370 | public boolean <B>seekTo</B>(byte[] key) |
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| 371 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 372 | <DL> |
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| 373 | <DD>Move the cursor to the first entry whose key is greater than or equal |
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| 374 | to the input key. Synonymous to seekTo(key, 0, key.length). The entry |
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| 375 | returned by the previous entry() call will be invalid. |
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| 376 | <P> |
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| 377 | <DD><DL> |
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| 378 | </DL> |
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| 379 | </DD> |
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| 380 | <DD><DL> |
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| 381 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - The input key |
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| 382 | <DT><B>Returns:</B><DD>true if we find an equal key. |
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| 383 | <DT><B>Throws:</B> |
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| 384 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 385 | </DD> |
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| 386 | </DL> |
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| 387 | <HR> |
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| 388 | |
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| 389 | <A NAME="seekTo(byte[], int, int)"><!-- --></A><H3> |
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| 390 | seekTo</H3> |
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| 391 | <PRE> |
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| 392 | public boolean <B>seekTo</B>(byte[] key, |
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| 393 | int keyOffset, |
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| 394 | int keyLen) |
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| 395 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 396 | <DL> |
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| 397 | <DD>Move the cursor to the first entry whose key is greater than or equal |
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| 398 | to the input key. The entry returned by the previous entry() call will |
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| 399 | be invalid. |
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| 400 | <P> |
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| 401 | <DD><DL> |
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| 402 | </DL> |
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| 403 | </DD> |
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| 404 | <DD><DL> |
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| 405 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - The input key<DD><CODE>keyOffset</CODE> - offset in the key buffer.<DD><CODE>keyLen</CODE> - key buffer length. |
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| 406 | <DT><B>Returns:</B><DD>true if we find an equal key; false otherwise. |
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| 407 | <DT><B>Throws:</B> |
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| 408 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 409 | </DD> |
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| 410 | </DL> |
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| 411 | <HR> |
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| 412 | |
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| 413 | <A NAME="rewind()"><!-- --></A><H3> |
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| 414 | rewind</H3> |
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| 415 | <PRE> |
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| 416 | public void <B>rewind</B>() |
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| 417 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 418 | <DL> |
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| 419 | <DD>Rewind to the first entry in the scanner. The entry returned by the |
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| 420 | previous entry() call will be invalid. |
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| 421 | <P> |
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| 422 | <DD><DL> |
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| 423 | </DL> |
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| 424 | </DD> |
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| 425 | <DD><DL> |
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| 426 | |
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| 427 | <DT><B>Throws:</B> |
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| 428 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 429 | </DD> |
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| 430 | </DL> |
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| 431 | <HR> |
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| 432 | |
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| 433 | <A NAME="seekToEnd()"><!-- --></A><H3> |
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| 434 | seekToEnd</H3> |
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| 435 | <PRE> |
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| 436 | public void <B>seekToEnd</B>() |
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| 437 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 438 | <DL> |
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| 439 | <DD>Seek to the end of the scanner. The entry returned by the previous |
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| 440 | entry() call will be invalid. |
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| 441 | <P> |
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| 442 | <DD><DL> |
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| 443 | </DL> |
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| 444 | </DD> |
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| 445 | <DD><DL> |
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| 446 | |
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| 447 | <DT><B>Throws:</B> |
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| 448 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 449 | </DD> |
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| 450 | </DL> |
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| 451 | <HR> |
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| 452 | |
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| 453 | <A NAME="lowerBound(byte[])"><!-- --></A><H3> |
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| 454 | lowerBound</H3> |
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| 455 | <PRE> |
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| 456 | public void <B>lowerBound</B>(byte[] key) |
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| 457 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 458 | <DL> |
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| 459 | <DD>Move the cursor to the first entry whose key is greater than or equal |
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| 460 | to the input key. Synonymous to lowerBound(key, 0, key.length). The |
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| 461 | entry returned by the previous entry() call will be invalid. |
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| 462 | <P> |
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| 463 | <DD><DL> |
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| 464 | </DL> |
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| 465 | </DD> |
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| 466 | <DD><DL> |
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| 467 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - The input key |
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| 468 | <DT><B>Throws:</B> |
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| 469 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 470 | </DD> |
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| 471 | </DL> |
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| 472 | <HR> |
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| 473 | |
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| 474 | <A NAME="lowerBound(byte[], int, int)"><!-- --></A><H3> |
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| 475 | lowerBound</H3> |
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| 476 | <PRE> |
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| 477 | public void <B>lowerBound</B>(byte[] key, |
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| 478 | int keyOffset, |
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| 479 | int keyLen) |
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| 480 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 481 | <DL> |
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| 482 | <DD>Move the cursor to the first entry whose key is greater than or equal |
---|
| 483 | to the input key. The entry returned by the previous entry() call will |
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| 484 | be invalid. |
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| 485 | <P> |
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| 486 | <DD><DL> |
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| 487 | </DL> |
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| 488 | </DD> |
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| 489 | <DD><DL> |
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| 490 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - The input key<DD><CODE>keyOffset</CODE> - offset in the key buffer.<DD><CODE>keyLen</CODE> - key buffer length. |
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| 491 | <DT><B>Throws:</B> |
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| 492 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 493 | </DD> |
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| 494 | </DL> |
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| 495 | <HR> |
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| 496 | |
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| 497 | <A NAME="upperBound(byte[])"><!-- --></A><H3> |
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| 498 | upperBound</H3> |
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| 499 | <PRE> |
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| 500 | public void <B>upperBound</B>(byte[] key) |
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| 501 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 502 | <DL> |
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| 503 | <DD>Move the cursor to the first entry whose key is strictly greater than |
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| 504 | the input key. Synonymous to upperBound(key, 0, key.length). The entry |
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| 505 | returned by the previous entry() call will be invalid. |
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| 506 | <P> |
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| 507 | <DD><DL> |
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| 508 | </DL> |
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| 509 | </DD> |
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| 510 | <DD><DL> |
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| 511 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - The input key |
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| 512 | <DT><B>Throws:</B> |
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| 513 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 514 | </DD> |
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| 515 | </DL> |
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| 516 | <HR> |
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| 517 | |
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| 518 | <A NAME="upperBound(byte[], int, int)"><!-- --></A><H3> |
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| 519 | upperBound</H3> |
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| 520 | <PRE> |
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| 521 | public void <B>upperBound</B>(byte[] key, |
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| 522 | int keyOffset, |
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| 523 | int keyLen) |
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| 524 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 525 | <DL> |
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| 526 | <DD>Move the cursor to the first entry whose key is strictly greater than |
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| 527 | the input key. The entry returned by the previous entry() call will be |
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| 528 | invalid. |
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| 529 | <P> |
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| 530 | <DD><DL> |
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| 531 | </DL> |
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| 532 | </DD> |
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| 533 | <DD><DL> |
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| 534 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - The input key<DD><CODE>keyOffset</CODE> - offset in the key buffer.<DD><CODE>keyLen</CODE> - key buffer length. |
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| 535 | <DT><B>Throws:</B> |
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| 536 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 537 | </DD> |
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| 538 | </DL> |
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| 539 | <HR> |
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| 540 | |
---|
| 541 | <A NAME="advance()"><!-- --></A><H3> |
---|
| 542 | advance</H3> |
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| 543 | <PRE> |
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| 544 | public boolean <B>advance</B>() |
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| 545 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 546 | <DL> |
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| 547 | <DD>Move the cursor to the next key-value pair. The entry returned by the |
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| 548 | previous entry() call will be invalid. |
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| 549 | <P> |
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| 550 | <DD><DL> |
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| 551 | </DL> |
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| 552 | </DD> |
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| 553 | <DD><DL> |
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| 554 | |
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| 555 | <DT><B>Returns:</B><DD>true if the cursor successfully moves. False when cursor is |
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| 556 | already at the end location and cannot be advanced. |
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| 557 | <DT><B>Throws:</B> |
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| 558 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 559 | </DD> |
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| 560 | </DL> |
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| 561 | <HR> |
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| 562 | |
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| 563 | <A NAME="close()"><!-- --></A><H3> |
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| 564 | close</H3> |
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| 565 | <PRE> |
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| 566 | public void <B>close</B>() |
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| 567 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 568 | <DL> |
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| 569 | <DD>Close the scanner. Release all resources. The behavior of using the |
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| 570 | scanner after calling close is not defined. The entry returned by the |
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| 571 | previous entry() call will be invalid. |
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| 572 | <P> |
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| 573 | <DD><DL> |
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| 574 | <DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true#close()" title="class or interface in java.io">close</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></CODE></DL> |
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| 575 | </DD> |
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| 576 | <DD><DL> |
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| 577 | |
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| 578 | <DT><B>Throws:</B> |
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| 579 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 580 | </DD> |
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| 581 | </DL> |
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| 582 | <HR> |
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| 583 | |
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| 584 | <A NAME="atEnd()"><!-- --></A><H3> |
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| 585 | atEnd</H3> |
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| 586 | <PRE> |
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| 587 | public boolean <B>atEnd</B>()</PRE> |
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| 588 | <DL> |
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| 589 | <DD>Is cursor at the end location? |
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| 590 | <P> |
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| 591 | <DD><DL> |
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| 592 | </DL> |
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| 593 | </DD> |
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| 594 | <DD><DL> |
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| 595 | |
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| 596 | <DT><B>Returns:</B><DD>true if the cursor is at the end location.</DL> |
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| 597 | </DD> |
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| 598 | </DL> |
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| 599 | <HR> |
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| 600 | |
---|
| 601 | <A NAME="entry()"><!-- --></A><H3> |
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| 602 | entry</H3> |
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| 603 | <PRE> |
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| 604 | public <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.Entry.html" title="class in org.apache.hadoop.io.file.tfile">TFile.Reader.Scanner.Entry</A> <B>entry</B>() |
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| 605 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 606 | <DL> |
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| 607 | <DD>Get an entry to access the key and value. |
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| 608 | <P> |
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| 609 | <DD><DL> |
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| 610 | </DL> |
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| 611 | </DD> |
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| 612 | <DD><DL> |
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| 613 | |
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| 614 | <DT><B>Returns:</B><DD>The Entry object to access the key and value. |
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| 615 | <DT><B>Throws:</B> |
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| 616 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 617 | </DD> |
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| 618 | </DL> |
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| 619 | <!-- ========= END OF CLASS DATA ========= --> |
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| 620 | <HR> |
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| 621 | |
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| 622 | |
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| 623 | <!-- ======= START OF BOTTOM NAVBAR ====== --> |
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| 624 | <A NAME="navbar_bottom"><!-- --></A> |
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| 625 | <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> |
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| 626 | <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> |
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| 627 | <TR> |
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| 628 | <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> |
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| 629 | <A NAME="navbar_bottom_firstrow"><!-- --></A> |
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| 630 | <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> |
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| 631 | <TR ALIGN="center" VALIGN="top"> |
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| 632 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> |
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| 633 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> |
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| 634 | <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> |
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| 635 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/TFile.Reader.Scanner.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> |
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| 636 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> |
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| 638 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> |
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| 640 | </TR> |
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| 641 | </TABLE> |
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| 642 | </TD> |
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| 643 | <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> |
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| 644 | </EM> |
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| 646 | </TR> |
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| 647 | |
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| 648 | <TR> |
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| 649 | <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> |
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| 650 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.html" title="class in org.apache.hadoop.io.file.tfile"><B>PREV CLASS</B></A> |
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| 651 | <A HREF="../../../../../../org/apache/hadoop/io/file/tfile/TFile.Reader.Scanner.Entry.html" title="class in org.apache.hadoop.io.file.tfile"><B>NEXT CLASS</B></A></FONT></TD> |
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| 655 | <SCRIPT type="text/javascript"> |
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| 656 | <!-- |
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| 657 | if(window==top) { |
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| 658 | document.writeln('<A HREF="../../../../../../allclasses-noframe.html"><B>All Classes</B></A>'); |
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| 659 | } |
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| 660 | //--> |
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