org.elasticsearch.index.query.BoolQueryParser Maven / Gradle / Ivy
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* Licensed to ElasticSearch and Shay Banon under one
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* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch 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.BooleanQuery;
import org.apache.lucene.search.Query;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
import java.util.List;
import static com.google.common.collect.Lists.newArrayList;
import static org.elasticsearch.common.lucene.search.Queries.fixNegativeQueryIfNeeded;
import static org.elasticsearch.common.lucene.search.Queries.optimizeQuery;
/**
*
*/
public class BoolQueryParser implements QueryParser {
public static final String NAME = "bool";
@Inject
public BoolQueryParser(Settings settings) {
BooleanQuery.setMaxClauseCount(settings.getAsInt("index.query.bool.max_clause_count", settings.getAsInt("indices.query.bool.max_clause_count", BooleanQuery.getMaxClauseCount())));
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
boolean disableCoord = false;
float boost = 1.0f;
String minimumShouldMatch = null;
List clauses = newArrayList();
String currentFieldName = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if ("must".equals(currentFieldName)) {
Query query = parseContext.parseInnerQuery();
if (query != null) {
clauses.add(new BooleanClause(query, BooleanClause.Occur.MUST));
}
} else if ("must_not".equals(currentFieldName) || "mustNot".equals(currentFieldName)) {
Query query = parseContext.parseInnerQuery();
if (query != null) {
clauses.add(new BooleanClause(query, BooleanClause.Occur.MUST_NOT));
}
} else if ("should".equals(currentFieldName)) {
Query query = parseContext.parseInnerQuery();
if (query != null) {
clauses.add(new BooleanClause(query, BooleanClause.Occur.SHOULD));
}
} else {
throw new QueryParsingException(parseContext.index(), "[bool] query does not support [" + currentFieldName + "]");
}
} else if (token == XContentParser.Token.START_ARRAY) {
if ("must".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
Query query = parseContext.parseInnerQuery();
if (query != null) {
clauses.add(new BooleanClause(query, BooleanClause.Occur.MUST));
}
}
} else if ("must_not".equals(currentFieldName) || "mustNot".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
Query query = parseContext.parseInnerQuery();
if (query != null) {
clauses.add(new BooleanClause(query, BooleanClause.Occur.MUST_NOT));
}
}
} else if ("should".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
Query query = parseContext.parseInnerQuery();
if (query != null) {
clauses.add(new BooleanClause(query, BooleanClause.Occur.SHOULD));
}
}
} else {
throw new QueryParsingException(parseContext.index(), "bool query does not support [" + currentFieldName + "]");
}
} else if (token.isValue()) {
if ("disable_coord".equals(currentFieldName) || "disableCoord".equals(currentFieldName)) {
disableCoord = parser.booleanValue();
} else if ("minimum_should_match".equals(currentFieldName) || "minimumShouldMatch".equals(currentFieldName)) {
minimumShouldMatch = parser.textOrNull();
} else if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else if ("minimum_number_should_match".equals(currentFieldName) || "minimumNumberShouldMatch".equals(currentFieldName)) {
minimumShouldMatch = parser.textOrNull();
} else {
throw new QueryParsingException(parseContext.index(), "[bool] query does not support [" + currentFieldName + "]");
}
}
}
if (clauses.isEmpty()) {
return null;
}
BooleanQuery query = new BooleanQuery(disableCoord);
for (BooleanClause clause : clauses) {
query.add(clause);
}
query.setBoost(boost);
Queries.applyMinimumShouldMatch(query, minimumShouldMatch);
return optimizeQuery(fixNegativeQueryIfNeeded(query));
}
}