1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.record.compiler.ant; |
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19 | |
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20 | import java.io.File; |
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21 | import java.util.ArrayList; |
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22 | import org.apache.hadoop.record.compiler.generated.Rcc; |
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23 | import org.apache.tools.ant.BuildException; |
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24 | import org.apache.tools.ant.DirectoryScanner; |
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25 | import org.apache.tools.ant.Project; |
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26 | import org.apache.tools.ant.Task; |
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27 | import org.apache.tools.ant.types.FileSet; |
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28 | |
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29 | /** |
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30 | * Hadoop record compiler ant Task |
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31 | *<p> This task takes the given record definition files and compiles them into |
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32 | * java or c++ |
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33 | * files. It is then up to the user to compile the generated files. |
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34 | * |
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35 | * <p> The task requires the <code>file</code> or the nested fileset element to be |
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36 | * specified. Optional attributes are <code>language</code> (set the output |
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37 | * language, default is "java"), |
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38 | * <code>destdir</code> (name of the destination directory for generated java/c++ |
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39 | * code, default is ".") and <code>failonerror</code> (specifies error handling |
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40 | * behavior. default is true). |
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41 | * <p><h4>Usage</h4> |
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42 | * <pre> |
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43 | * <recordcc |
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44 | * destdir="${basedir}/gensrc" |
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45 | * language="java"> |
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46 | * <fileset include="**\/*.jr" /> |
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47 | * </recordcc> |
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48 | * </pre> |
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49 | */ |
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50 | public class RccTask extends Task { |
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51 | |
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52 | private String language = "java"; |
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53 | private File src; |
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54 | private File dest = new File("."); |
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55 | private final ArrayList<FileSet> filesets = new ArrayList<FileSet>(); |
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56 | private boolean failOnError = true; |
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57 | |
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58 | /** Creates a new instance of RccTask */ |
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59 | public RccTask() { |
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60 | } |
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61 | |
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62 | /** |
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63 | * Sets the output language option |
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64 | * @param language "java"/"c++" |
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65 | */ |
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66 | public void setLanguage(String language) { |
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67 | this.language = language; |
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68 | } |
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69 | |
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70 | /** |
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71 | * Sets the record definition file attribute |
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72 | * @param file record definition file |
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73 | */ |
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74 | public void setFile(File file) { |
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75 | this.src = file; |
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76 | } |
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77 | |
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78 | /** |
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79 | * Given multiple files (via fileset), set the error handling behavior |
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80 | * @param flag true will throw build exception in case of failure (default) |
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81 | */ |
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82 | public void setFailonerror(boolean flag) { |
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83 | this.failOnError = flag; |
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84 | } |
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85 | |
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86 | /** |
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87 | * Sets directory where output files will be generated |
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88 | * @param dir output directory |
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89 | */ |
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90 | public void setDestdir(File dir) { |
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91 | this.dest = dir; |
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92 | } |
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93 | |
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94 | /** |
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95 | * Adds a fileset that can consist of one or more files |
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96 | * @param set Set of record definition files |
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97 | */ |
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98 | public void addFileset(FileSet set) { |
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99 | filesets.add(set); |
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100 | } |
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101 | |
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102 | /** |
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103 | * Invoke the Hadoop record compiler on each record definition file |
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104 | */ |
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105 | public void execute() throws BuildException { |
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106 | if (src == null && filesets.size()==0) { |
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107 | throw new BuildException("There must be a file attribute or a fileset child element"); |
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108 | } |
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109 | if (src != null) { |
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110 | doCompile(src); |
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111 | } |
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112 | Project myProject = getProject(); |
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113 | for (int i = 0; i < filesets.size(); i++) { |
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114 | FileSet fs = filesets.get(i); |
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115 | DirectoryScanner ds = fs.getDirectoryScanner(myProject); |
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116 | File dir = fs.getDir(myProject); |
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117 | String[] srcs = ds.getIncludedFiles(); |
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118 | for (int j = 0; j < srcs.length; j++) { |
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119 | doCompile(new File(dir, srcs[j])); |
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120 | } |
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121 | } |
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122 | } |
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123 | |
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124 | private void doCompile(File file) throws BuildException { |
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125 | String[] args = new String[5]; |
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126 | args[0] = "--language"; |
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127 | args[1] = this.language; |
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128 | args[2] = "--destdir"; |
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129 | args[3] = this.dest.getPath(); |
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130 | args[4] = file.getPath(); |
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131 | int retVal = Rcc.driver(args); |
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132 | if (retVal != 0 && failOnError) { |
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133 | throw new BuildException("Hadoop record compiler returned error code "+retVal); |
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134 | } |
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135 | } |
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136 | } |
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