[31] | 1 | /************************************************************************************ |
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| 2 | * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University |
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| 3 | * All rights reserved. |
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| 4 | * Refer to LICENSE for terms and conditions of use. |
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| 5 | ***********************************************************************************/ |
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| 6 | package vnsim.applications.vitp.utils; |
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| 7 | |
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| 8 | import java.util.*; |
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| 9 | |
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| 10 | public class URIParser { |
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| 11 | //this class contains static methods, that help parsing a URI; |
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| 12 | |
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| 13 | //URI Format: "/type/tag?[cnt=*&tout=*]¶m1=*¶m2=*..." |
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| 14 | |
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| 15 | //all the methods return null if the format of the URI is wrong |
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| 16 | |
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| 17 | public static String getType(String uri) { |
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| 18 | if(uri==null) return null; |
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| 19 | if(!uri.startsWith("/")) return null; |
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| 20 | int i1=uri.indexOf('/',1); |
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| 21 | if(i1==-1) return null; |
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| 22 | return uri.substring(1,i1); |
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| 23 | } |
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| 24 | |
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| 25 | public static String getTag(String uri) { |
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| 26 | if(uri==null) return null; |
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| 27 | if(!uri.startsWith("/")) return null; |
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| 28 | int i1=uri.indexOf('/',1); |
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| 29 | if(i1==-1) return null; |
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| 30 | int i2=uri.indexOf('?',i1); |
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| 31 | if(i2==-1) return uri.substring(i1+1); |
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| 32 | return uri.substring(i1+1,i2); |
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| 33 | } |
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| 34 | |
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| 35 | public static Vector<String> getRCExpressions(String uri){ |
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| 36 | //returns a vector of all expressions within the brackets; |
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| 37 | //the corresponding service should do more parsing inside |
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| 38 | //each expression, since it could have particular formats |
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| 39 | //(e.g with < > *) |
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| 40 | |
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| 41 | if(uri==null) return null; |
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| 42 | if(!uri.startsWith("/")) return null; |
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| 43 | int i1=uri.indexOf('/',1); |
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| 44 | if(i1==-1) return null; |
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| 45 | int i2=uri.indexOf('?',i1); |
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| 46 | if(i2==-1) return null; |
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| 47 | if(uri.charAt(i2+1)!='[') return null; |
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| 48 | int index=i2+2; |
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| 49 | int finIndex=uri.indexOf(']',index); |
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| 50 | if(finIndex==-1) return null; |
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| 51 | String rcs=uri.substring(index,finIndex); |
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| 52 | Vector<String> ret=new Vector<String>(); |
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| 53 | StringTokenizer st=new StringTokenizer(rcs,"&"); |
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| 54 | while(st.hasMoreTokens()) { |
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| 55 | ret.addElement(st.nextToken()); |
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| 56 | } |
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| 57 | return ret; |
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| 58 | } |
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| 59 | |
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| 60 | public static Vector<String> getParams(String uri){ |
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| 61 | //returns the parameters after the [] as a vector of Strings |
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| 62 | //the corresponding service should do more parsing inside |
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| 63 | //each expression, since it could have particular formats |
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| 64 | //(e.g with < > *) |
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| 65 | if(uri==null) return null; |
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| 66 | if(!uri.startsWith("/")) return null; |
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| 67 | int i1=uri.indexOf('/',1); |
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| 68 | if(i1==-1) return null; |
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| 69 | i1=uri.indexOf('?',i1); |
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| 70 | if(i1==-1) return null; |
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| 71 | i1=uri.indexOf('[',i1); |
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| 72 | if(i1==-1) return null; |
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| 73 | i1=uri.indexOf(']',i1); |
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| 74 | if(i1==-1) return null; |
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| 75 | Vector<String> ret=new Vector<String>(); |
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| 76 | i1++; |
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| 77 | if(i1>=uri.length()) return ret; |
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| 78 | if(uri.charAt(i1)!='&') return null; |
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| 79 | StringTokenizer st=new StringTokenizer(uri.substring(i1),"&"); |
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| 80 | while(st.hasMoreTokens()) { |
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| 81 | ret.addElement(st.nextToken()); |
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| 82 | } |
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| 83 | return ret; |
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| 84 | } |
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| 85 | |
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| 86 | public static String getURIFromParts(String type, String tag, Vector h1, Vector h2){ |
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| 87 | if(type==null || tag==null || h1==null || h2==null) |
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| 88 | return null; |
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| 89 | String ret="/"+type+"/"+tag+"?["; |
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| 90 | for(int i=0;i<h1.size();i++) { |
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| 91 | ret=ret+((String)h1.elementAt(i)); |
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| 92 | if(i<h1.size()-1) |
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| 93 | ret=ret+"&"; |
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| 94 | } |
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| 95 | ret=ret+"]"; |
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| 96 | for(int i=0;i<h2.size();i++) { |
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| 97 | ret=ret+"&"+((String)h2.elementAt(i)); |
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| 98 | } |
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| 99 | return ret; |
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| 100 | } |
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| 101 | } |
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