[14463] | 1 | /*
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[16349] | 2 | * MGPPSearchWrapperImpl.cpp
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| 3 | * Copyright (C) 2007 New Zealand Digital Library, http://www.nzdl.org
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[14463] | 4 | *
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| 5 | * This program is free software; you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation; either version 2 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 18 | */
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| 19 | #ifdef __WIN32__
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[14910] | 20 | #include <win32cfg.h>
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[14463] | 21 | #include <strstream>
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| 22 | #include <sstream>
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| 23 | #else
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| 24 | #ifdef __APPLE__
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| 25 | #include <strstream>
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| 26 | #include <sstream>
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| 27 | #else
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| 28 | #include <sstream>
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| 29 | #endif
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| 30 | #endif
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| 31 |
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| 32 | #include <jni.h>
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| 33 | #include "org_greenstone_mgpp_MGPPSearchWrapper.h"
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[16349] | 34 | #include "MGPPSearchWrapperImpl.h"
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[14463] | 35 | #include "GSDLQueryParser.h"
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| 36 | #include "MGQuery.h"
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| 37 |
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[16349] | 38 | MGPPSearchData::MGPPSearchData() {
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[14463] | 39 | indexData = new IndexData();
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| 40 | queryInfo = new QueryInfo();
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| 41 |
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| 42 | if (queryInfo==NULL) {
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| 43 | cerr<<"couldn't allocate new query info\n";
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| 44 | if (indexData!=NULL) {
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| 45 | delete indexData;
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| 46 | }
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| 47 | }
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| 48 |
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| 49 | // set all the default params
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| 50 | SetCStr(queryInfo->docLevel, "Document"); // the level to search at
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| 51 | queryInfo->maxDocs = 50;
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| 52 | queryInfo->sortByRank = true;
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| 53 | queryInfo->exactWeights = false;
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| 54 | queryInfo->needRankInfo = true;
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| 55 | queryInfo->needTermFreqs = true;
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| 56 |
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| 57 | UCArrayClear(level);
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| 58 | SetCStr(level, "Document"); // the level to return docs at
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| 59 | defaultStemMethod=0;
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| 60 | defaultBoolCombine=0;
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| 61 | maxNumeric = 4;
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| 62 | }
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| 63 |
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[16349] | 64 | MGPPSearchData::~MGPPSearchData() {
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[14463] | 65 | if (indexData !=NULL) {
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| 66 | delete indexData;
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| 67 | }
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| 68 | if (queryInfo !=NULL) {
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| 69 | delete queryInfo;
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| 70 | }
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| 71 | }
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| 72 |
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| 73 | // ********************************************
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| 74 | // initialisation stuff
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| 75 | // ********************************************
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| 76 |
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| 77 | // cached ids for java stuff
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[16349] | 78 | jfieldID FID_mgpp_data = NULL; // MGPPSearchData
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[14463] | 79 | jfieldID FID_query_result = NULL; // MGPPQueryResult
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| 80 | jmethodID MID_addDoc=NULL; // MGPPQueryResult.addDoc()
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| 81 | jmethodID MID_addTerm=NULL; // MGPPQueryResult.addTerm()
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| 82 | jmethodID MID_setTotalDocs=NULL; // MGPPQueryResult.setTotalDocs()
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| 83 | jmethodID MID_clearResult=NULL; //MGPPQueryResult.clear()
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| 84 | jmethodID MID_setSyntaxError=NULL; // MGPPQueryResult.setSyntaxError()
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| 85 | jclass CID_String=NULL; // class ID of String
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| 86 |
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| 87 | /* to access objects and methods on java side, need their field/method ids -
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| 88 | this initialises them at the start to avoid recalculating them each time they
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| 89 | are needed
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| 90 | Note: the descriptors need to be exactly right, otherwise you get an error
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| 91 | saying "no such field" but no reference to the fact that it has the right
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| 92 | name but the wrong type.
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| 93 | Note: apparently the jclass is a local ref and should only work
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| 94 | in the method that created it. It seems to work ok, but I'll make it
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| 95 | global cos the book said I should, and it may avoid future hassles.
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| 96 | */
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| 97 | JNIEXPORT void JNICALL
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| 98 | Java_org_greenstone_mgpp_MGPPSearchWrapper_initIDs (JNIEnv *j_env, jclass j_cls) {
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| 99 |
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| 100 | FID_mgpp_data = j_env->GetFieldID(j_cls, "mgpp_data_ptr_", "J"); //a long-"J"
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| 101 | if (FID_mgpp_data==NULL) {
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| 102 | cerr <<"MGPP JNI: field mgpp_data_ptr_ not found"<<endl;
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| 103 | }
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| 104 |
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| 105 | FID_query_result = j_env->GetFieldID(j_cls, "mgpp_query_result_", "Lorg/greenstone/mgpp/MGPPQueryResult;"); // an object -"L<class name>;"
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| 106 | if (FID_query_result==NULL) {
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| 107 | cerr <<"MGPP JNI: field mgpp_query_result_ not found"<<endl;
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| 108 | }
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| 109 | // the methods we want to use
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| 110 |
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| 111 | // addDoc(long doc, float rank)
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| 112 | jclass JC_MGPPQueryResult = j_env->FindClass("org/greenstone/mgpp/MGPPQueryResult");
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| 113 | MID_addDoc = j_env->GetMethodID(JC_MGPPQueryResult, "addDoc", "(JF)V");
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| 114 | if (MID_addDoc==NULL) {
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| 115 | cerr <<"MGPP JNI: addDoc method not found"<<endl;
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| 116 | }
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| 117 | // addTerm(String term, String tag, int stem_method, long match_docs,
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| 118 | // long term_freq, String[] equiv_terms)
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| 119 | MID_addTerm = j_env->GetMethodID(JC_MGPPQueryResult, "addTerm", "(Ljava/lang/String;Ljava/lang/String;IJJ[Ljava/lang/String;)V");
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| 120 | if (MID_addTerm==NULL) {
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| 121 | cerr <<"MGPP JNI: method addTerm not found"<<endl;
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| 122 | }
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| 123 |
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| 124 | // setTotalDocs(long)
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| 125 | MID_setTotalDocs = j_env->GetMethodID(JC_MGPPQueryResult, "setTotalDocs", "(J)V");
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| 126 | if (MID_setTotalDocs==NULL) {
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| 127 | cerr <<"MGPP JNI: method setTotalDocs not found"<<endl;
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| 128 | }
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| 129 |
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| 130 | MID_clearResult = j_env->GetMethodID(JC_MGPPQueryResult, "clear", "()V");
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| 131 | if (MID_clearResult==NULL) {
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| 132 | cerr <<"MGPP JNI: method clear not found"<<endl;
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| 133 | }
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| 134 | MID_setSyntaxError = j_env->GetMethodID(JC_MGPPQueryResult, "setSyntaxError", "(Z)V");
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| 135 | if (MID_clearResult==NULL) {
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| 136 | cerr <<"MGPP JNI: method setSyntaxError not found"<<endl;
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| 137 | }
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| 138 |
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| 139 | // get the class for String to use in NewObjectArray in runQuery()
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| 140 | // FindClass returns a local reference - have to convert it to a global one
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| 141 | jclass local_CID_String = j_env->FindClass("java/lang/String");
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| 142 | if (local_CID_String==NULL) {
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| 143 | cerr <<"MGPP JNI: java String class not found"<<endl;
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| 144 | } else {
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| 145 | /* create a global ref */
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| 146 | CID_String = (jclass)j_env->NewGlobalRef(local_CID_String);
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| 147 | /* The local reference is no longer useful */
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| 148 | j_env->DeleteLocalRef(local_CID_String);
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| 149 |
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| 150 | /* Is the global reference created successfully? */
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| 151 | if (CID_String == NULL) {
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| 152 | return; /* out of memory exception thrown */
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| 153 | }
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| 154 | }
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| 155 |
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| 156 | }
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| 157 |
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[16349] | 158 | /* the java side MGPPSearchWrapper has a pointer to a C++ object - MGPPSearchData
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[14463] | 159 | initialise this and set the pointer
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| 160 | */
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| 161 | JNIEXPORT jboolean JNICALL
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| 162 | Java_org_greenstone_mgpp_MGPPSearchWrapper_initCppSide (JNIEnv *j_env, jobject j_obj){
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| 163 |
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[16349] | 164 | MGPPSearchData * data = new MGPPSearchData();
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[14463] | 165 | j_env->SetIntField(j_obj, FID_mgpp_data, (long)data);
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| 166 |
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| 167 | return true;
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| 168 |
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| 169 | }
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| 170 |
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| 171 | //******************************************
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| 172 | // do a query
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| 173 | // ****************************************
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| 174 |
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| 175 | /* load the IndexData - cached for querying
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| 176 | */
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| 177 | JNIEXPORT jboolean JNICALL
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| 178 | Java_org_greenstone_mgpp_MGPPSearchWrapper_loadIndexData (JNIEnv *j_env, jobject j_obj, jstring j_index_name) {
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| 179 |
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| 180 | jint data_ptr = j_env->GetIntField(j_obj, FID_mgpp_data);
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[16349] | 181 | MGPPSearchData * data = (MGPPSearchData *)data_ptr;
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[14463] | 182 |
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| 183 | #ifdef __WIN32__
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| 184 | const char* base_dir = "";
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| 185 | #else
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| 186 | const char* base_dir = "/";
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| 187 | #endif
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| 188 |
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| 189 | const char * index_name = j_env->GetStringUTFChars( j_index_name, NULL);
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| 190 | if (index_name==NULL) {
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| 191 | return false;
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| 192 | }
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| 193 |
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| 194 | jboolean j_result=false;
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| 195 |
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| 196 | // why doesn't this complain about const??
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| 197 | if (data->indexData->LoadData(base_dir, index_name)) {
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| 198 | j_result=true;
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| 199 | }
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| 200 |
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| 201 | // release any gets
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| 202 | j_env->ReleaseStringUTFChars(j_index_name, index_name);
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| 203 |
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| 204 | return j_result;
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| 205 | }
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| 206 |
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| 207 | /* unload the data
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| 208 | */
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| 209 | JNIEXPORT jboolean JNICALL
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| 210 | Java_org_greenstone_mgpp_MGPPSearchWrapper_unloadIndexData (JNIEnv *j_env, jobject j_obj) {
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| 211 |
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| 212 | jint data_ptr = j_env->GetIntField(j_obj, FID_mgpp_data);
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[16349] | 213 | MGPPSearchData * data = (MGPPSearchData *)data_ptr;
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[14463] | 214 |
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| 215 | data->indexData->UnloadData();
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| 216 | return true;
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| 217 |
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| 218 | }
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| 219 |
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| 220 | /* do the actual query - the results are written to query_result held on the
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| 221 | java side */
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| 222 | JNIEXPORT void JNICALL
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| 223 | Java_org_greenstone_mgpp_MGPPSearchWrapper_runQuery (JNIEnv *j_env, jobject j_obj, jstring j_query){
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| 224 |
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| 225 | jthrowable exc; // an exception - check if something funny has happened
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| 226 | const char *query = j_env->GetStringUTFChars(j_query, NULL);
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| 227 | if (query==NULL) {
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| 228 | return; // exception already thrown
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| 229 | }
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| 230 | // turn to UCArray for mgpp and then release the string
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| 231 | UCArray queryArray;
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| 232 | SetCStr(queryArray, query);
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| 233 | j_env->ReleaseStringUTFChars(j_query, query);
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| 234 |
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| 235 | // the query data
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[16349] | 236 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 237 |
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| 238 | // the result to write to
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| 239 | jobject result_ptr = j_env->GetObjectField(j_obj, FID_query_result);
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| 240 | if (result_ptr==NULL) {
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| 241 | cerr <<"couldn't access the result to write to"<<endl;
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| 242 | return;
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| 243 | }
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| 244 |
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| 245 | // clear the result
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| 246 | j_env->CallVoidMethod(result_ptr, MID_clearResult);
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[16349] | 247 | exc = j_env->ExceptionOccurred(); // this catches the exception I think - it
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[14463] | 248 | //wont be thrown any further
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| 249 | if (exc) {
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| 250 | j_env->ExceptionDescribe();
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| 251 | return;
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| 252 | }
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| 253 | // the mgpp QueryResult that we will use
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| 254 | ExtQueryResult queryResult;
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| 255 |
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| 256 | QueryNode * queryTree = NULL;
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| 257 | // parse the query string into a tree structure
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| 258 | queryTree = ParseQuery(queryArray, data->defaultBoolCombine,
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| 259 | data->defaultStemMethod, data->maxNumeric);
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| 260 | if (queryTree == NULL) {
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| 261 | // invalid syntax
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| 262 | j_env->CallVoidMethod(result_ptr, MID_setSyntaxError, true);
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[16349] | 263 | cerr << "MGPPSearchWrapperImpl: invalid query syntax!!\n";
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[14463] | 264 | return;
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| 265 | }
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| 266 | // print the query
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| 267 | PrintNode (cout, queryTree);
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| 268 | // finally, do the query
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| 269 | MGQuery(*(data->indexData), *(data->queryInfo), queryTree, queryResult, data->level);
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| 270 |
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| 271 | delete queryTree;
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| 272 |
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| 273 | // convert queryResult to the java side version
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| 274 | // use levels rather than docs of ExtQueryResult
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| 275 | // CallVoidMethod(obj, method id, args to method)
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| 276 | for (int i=0; i<queryResult.levels.size(); i++) {
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| 277 | jlong doc = queryResult.levels[i];
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| 278 | jfloat rank = queryResult.ranks[i];
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| 279 | j_env->CallVoidMethod(result_ptr, MID_addDoc, doc, rank);
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| 280 | exc = j_env->ExceptionOccurred();
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| 281 | if (exc) {
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| 282 | j_env->ExceptionDescribe();
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| 283 | return;
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| 284 | }
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| 285 |
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| 286 | }
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| 287 |
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| 288 | // actual num of docs
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| 289 | jlong total = queryResult.actualNumDocs;
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| 290 | j_env->CallVoidMethod(result_ptr, MID_setTotalDocs, total);
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| 291 | exc = j_env->ExceptionOccurred();
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| 292 | if (exc) {
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| 293 | j_env->ExceptionDescribe();
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| 294 | return;
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| 295 | }
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| 296 |
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| 297 | // the terms
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| 298 | for (int j=0; j<queryResult.termFreqs.size(); j++) {
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| 299 |
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| 300 | TermFreqData tf = queryResult.termFreqs[j];
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| 301 | jstring term = j_env->NewStringUTF(GetCStr(tf.term));
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| 302 | jstring tag = j_env->NewStringUTF(GetCStr(tf.tag));
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| 303 | jint stem = tf.stemMethod;
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| 304 | jlong match = tf.matchDocs;
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| 305 | jlong freq = tf.termFreq;
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| 306 |
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| 307 | jobjectArray equivs=NULL;
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| 308 | jstring empty = j_env->NewStringUTF(""); // the initial object to fill the array
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| 309 | jint num_equivs = tf.equivTerms.size();
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| 310 | equivs = j_env->NewObjectArray(num_equivs, CID_String, empty);
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| 311 | if (equivs==NULL) {
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| 312 | cerr<<"couldn't create object array"<<endl;
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| 313 |
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| 314 | } else {
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| 315 | for (int k=0; k<num_equivs;k++) {
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| 316 | jstring equiv = j_env->NewStringUTF(GetCStr(tf.equivTerms[k]));
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| 317 | j_env->SetObjectArrayElement(equivs, k, equiv);
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| 318 | }
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| 319 |
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| 320 |
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| 321 | j_env->CallVoidMethod(result_ptr, MID_addTerm, term, tag, stem, match, freq, equivs);
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| 322 | exc = j_env->ExceptionOccurred();
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| 323 | if (exc) {
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| 324 | j_env->ExceptionDescribe();
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| 325 | return;
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| 326 | }
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| 327 | }
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| 328 | }
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| 329 |
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| 330 |
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| 331 | }
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| 332 |
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| 333 | JNIEXPORT void JNICALL
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| 334 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setStem (JNIEnv *j_env,
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| 335 | jobject j_obj,
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| 336 | jboolean j_on) {
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[16349] | 337 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 338 | if (j_on) {
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| 339 | data->defaultStemMethod |= 2;
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| 340 | } else {
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| 341 | data->defaultStemMethod &= 0xd;
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| 342 | }
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| 343 |
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| 344 | }
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| 345 |
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| 346 | JNIEXPORT void JNICALL
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| 347 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setAccentFold (JNIEnv *j_env,
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| 348 | jobject j_obj,
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| 349 | jboolean j_on) {
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[16349] | 350 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 351 | if (j_on) {
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| 352 | data->defaultStemMethod |= 4;
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| 353 | } else {
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| 354 | data->defaultStemMethod &= 0xb;
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| 355 | }
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| 356 | }
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| 357 |
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| 358 |
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| 359 | JNIEXPORT void JNICALL
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| 360 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setCase (JNIEnv *j_env,
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| 361 | jobject j_obj,
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| 362 | jboolean j_on) {
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[16349] | 363 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 364 |
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| 365 | if (j_on) {
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| 366 | data->defaultStemMethod |= 1;
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| 367 | } else {
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| 368 | data->defaultStemMethod &= 0xe;
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| 369 | }
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| 370 | }
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| 371 |
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| 372 | JNIEXPORT void JNICALL
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| 373 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setMaxDocs (JNIEnv *j_env,
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| 374 | jobject j_obj,
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| 375 | jint j_max) {
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[16349] | 376 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 377 | data->queryInfo->maxDocs=j_max;
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| 378 | }
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| 379 |
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| 380 | JNIEXPORT void JNICALL
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| 381 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setMaxNumeric (JNIEnv *j_env,
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| 382 | jobject j_obj,
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| 383 | jint j_max) {
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[16349] | 384 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 385 | data->maxNumeric=j_max;
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| 386 | }
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| 387 |
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| 388 | JNIEXPORT void JNICALL
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| 389 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setSortByRank (JNIEnv *j_env,
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| 390 | jobject j_obj,
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| 391 | jboolean j_on) {
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[16349] | 392 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 393 |
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| 394 | data->queryInfo->sortByRank=j_on;
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| 395 | }
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| 396 |
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| 397 | JNIEXPORT void JNICALL
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| 398 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setReturnTerms(JNIEnv *j_env,
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| 399 | jobject j_obj,
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| 400 | jboolean j_on) {
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[16349] | 401 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 402 | data->queryInfo->needTermFreqs = j_on;
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| 403 |
|
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| 404 | }
|
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| 405 |
|
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| 406 | JNIEXPORT void JNICALL
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| 407 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setQueryLevel(JNIEnv *j_env,
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| 408 | jobject j_obj,
|
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| 409 | jstring j_level){
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| 410 |
|
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[16349] | 411 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
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[14463] | 412 |
|
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| 413 | const char * level = j_env->GetStringUTFChars(j_level, NULL);
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| 414 | if (level==NULL) {
|
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| 415 | return; // exception already thrown
|
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| 416 | }
|
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| 417 |
|
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| 418 | data->queryInfo->docLevel.clear();
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| 419 | SetCStr(data->queryInfo->docLevel, level);
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| 420 |
|
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| 421 | // release the java stuff
|
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| 422 | j_env->ReleaseStringUTFChars(j_level, level);
|
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| 423 |
|
---|
| 424 | }
|
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| 425 |
|
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| 426 | JNIEXPORT void JNICALL
|
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| 427 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setReturnLevel(JNIEnv *j_env,
|
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| 428 | jobject j_obj,
|
---|
| 429 | jstring j_level){
|
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| 430 |
|
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[16349] | 431 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
|
---|
[14463] | 432 |
|
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| 433 | const char * level = j_env->GetStringUTFChars(j_level, NULL);
|
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| 434 | if (level==NULL) {
|
---|
| 435 | return; // exception already thrown
|
---|
| 436 | }
|
---|
| 437 |
|
---|
| 438 | data->level.clear();
|
---|
| 439 | SetCStr(data->level, level);
|
---|
| 440 |
|
---|
| 441 | // release the java stuff
|
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| 442 | j_env->ReleaseStringUTFChars(j_level, level);
|
---|
| 443 |
|
---|
| 444 |
|
---|
| 445 | }
|
---|
| 446 |
|
---|
| 447 | JNIEXPORT void JNICALL
|
---|
| 448 | Java_org_greenstone_mgpp_MGPPSearchWrapper_setMatchMode (JNIEnv *j_env,
|
---|
| 449 | jobject j_obj,
|
---|
| 450 | jint j_mode){
|
---|
| 451 |
|
---|
[16349] | 452 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
|
---|
[14463] | 453 | data->defaultBoolCombine=j_mode;
|
---|
| 454 |
|
---|
| 455 | }
|
---|
| 456 |
|
---|
| 457 | JNIEXPORT jstring JNICALL
|
---|
| 458 | Java_org_greenstone_mgpp_MGPPSearchWrapper_getQueryParams (JNIEnv *j_env,
|
---|
| 459 | jobject j_obj){
|
---|
| 460 |
|
---|
[16349] | 461 | MGPPSearchData * data = (MGPPSearchData *)j_env->GetIntField(j_obj, FID_mgpp_data);
|
---|
[14463] | 462 |
|
---|
| 463 | // print the data to a stringstream, then convert to char*, then to
|
---|
| 464 | //jstring
|
---|
| 465 |
|
---|
| 466 | stringstream output;
|
---|
| 467 | output << "Query params:"<<endl
|
---|
| 468 | // need to change this to use platform specific separator for niceness
|
---|
| 469 | << "index\t\t"<<data->indexData->basePath<<"/"<<data->indexData->filename<<endl
|
---|
| 470 | <<"search level\t"<<GetCStr(data->queryInfo->docLevel)<<endl
|
---|
| 471 | <<"result level\t"<<GetCStr(data->level)<<endl
|
---|
| 472 | <<"casefold\t"<<(data->defaultStemMethod&1)<<endl
|
---|
| 473 | <<"stem\t\t"<<(data->defaultStemMethod&2)<<endl
|
---|
| 474 | <<"order by rank\t"<<data->queryInfo->sortByRank<<endl
|
---|
| 475 | <<"query type\t"<<(data->defaultBoolCombine==1?"all":"some")<<endl
|
---|
| 476 | <<"max docs\t"<<data->queryInfo->maxDocs<<endl<<ends;
|
---|
| 477 |
|
---|
| 478 | const char *result = output.str().c_str();
|
---|
| 479 | jstring j_result = j_env->NewStringUTF(result);
|
---|
| 480 | delete (char *)result;
|
---|
| 481 | return j_result;
|
---|
| 482 | }
|
---|