/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search licenses this
* file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.index.query;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.FuzzyQuery;
import org.apache.lucene.search.Query;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
/**
* @author kimchy (shay.banon)
*/
public class TextQueryParser implements QueryParser {
public static final String NAME = "text";
@Inject public TextQueryParser() {
}
@Override public String[] names() {
return new String[]{NAME, "text_phrase", "textPhrase", "text_phrase_prefix", "textPhrasePrefix", "fuzzyText", "fuzzy_text"};
}
@Override public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
org.elasticsearch.index.search.TextQueryParser.Type type = org.elasticsearch.index.search.TextQueryParser.Type.BOOLEAN;
if ("text_phrase".equals(parser.currentName()) || "textPhrase".equals(parser.currentName())) {
type = org.elasticsearch.index.search.TextQueryParser.Type.PHRASE;
} else if ("text_phrase_prefix".equals(parser.currentName()) || "textPhrasePrefix".equals(parser.currentName())) {
type = org.elasticsearch.index.search.TextQueryParser.Type.PHRASE_PREFIX;
}
XContentParser.Token token = parser.nextToken();
assert token == XContentParser.Token.FIELD_NAME;
String fieldName = parser.currentName();
String text = null;
float boost = 1.0f;
int phraseSlop = 0;
String analyzer = null;
String fuzziness = null;
int prefixLength = FuzzyQuery.defaultPrefixLength;
int maxExpansions = FuzzyQuery.defaultMaxExpansions;
BooleanClause.Occur occur = BooleanClause.Occur.SHOULD;
token = parser.nextToken();
if (token == XContentParser.Token.START_OBJECT) {
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if ("query".equals(currentFieldName)) {
text = parser.text();
} else if ("type".equals(currentFieldName)) {
String tStr = parser.text();
if ("boolean".equals(tStr)) {
type = org.elasticsearch.index.search.TextQueryParser.Type.BOOLEAN;
} else if ("phrase".equals(tStr)) {
type = org.elasticsearch.index.search.TextQueryParser.Type.PHRASE;
} else if ("phrase_prefix".equals(tStr) || "phrasePrefix".equals(currentFieldName)) {
type = org.elasticsearch.index.search.TextQueryParser.Type.PHRASE_PREFIX;
}
} else if ("analyzer".equals(currentFieldName)) {
analyzer = parser.textOrNull();
} else if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else if ("slop".equals(currentFieldName) || "phrase_slop".equals(currentFieldName) || "phraseSlop".equals(currentFieldName)) {
phraseSlop = parser.intValue();
} else if ("fuzziness".equals(currentFieldName)) {
fuzziness = parser.textOrNull();
} else if ("prefix_length".equals(currentFieldName) || "prefixLength".equals(currentFieldName)) {
prefixLength = parser.intValue();
} else if ("max_expansions".equals(currentFieldName) || "maxExpansions".equals(currentFieldName)) {
maxExpansions = parser.intValue();
} else if ("operator".equals(currentFieldName)) {
String op = parser.text();
if ("or".equalsIgnoreCase(op)) {
occur = BooleanClause.Occur.SHOULD;
} else if ("and".equalsIgnoreCase(op)) {
occur = BooleanClause.Occur.MUST;
} else {
throw new QueryParsingException(parseContext.index(), "text query requires operator to be either 'and' or 'or', not [" + op + "]");
}
}
}
}
parser.nextToken();
} else {
text = parser.text();
// move to the next token
parser.nextToken();
}
if (text == null) {
throw new QueryParsingException(parseContext.index(), "No text specified for text query");
}
org.elasticsearch.index.search.TextQueryParser tQP = new org.elasticsearch.index.search.TextQueryParser(parseContext, fieldName, text);
tQP.setPhraseSlop(phraseSlop);
tQP.setAnalyzer(analyzer);
tQP.setFuzziness(fuzziness);
tQP.setFuzzyPrefixLength(prefixLength);
tQP.setMaxExpansions(maxExpansions);
tQP.setOccur(occur);
Query query = tQP.parse(type);
query.setBoost(boost);
return query;
}
}