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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file 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.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.search.spans.SpanTermQuery;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.lucene.BytesRefs;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.MappedFieldType;
import java.io.IOException;
/**
* A Span Query that matches documents containing a term.
* @see SpanTermQuery
*/
public class SpanTermQueryBuilder extends BaseTermQueryBuilder<SpanTermQueryBuilder> implements SpanQueryBuilder<SpanTermQueryBuilder> {
public static final String NAME = "span_term";
public static final ParseField QUERY_NAME_FIELD = new ParseField(NAME);
private static final ParseField TERM_FIELD = new ParseField("term");
/** @see BaseTermQueryBuilder#BaseTermQueryBuilder(String, String) */
public SpanTermQueryBuilder(String name, String value) {
super(name, (Object) value);
}
/** @see BaseTermQueryBuilder#BaseTermQueryBuilder(String, int) */
public SpanTermQueryBuilder(String name, int value) {
super(name, (Object) value);
}
/** @see BaseTermQueryBuilder#BaseTermQueryBuilder(String, long) */
public SpanTermQueryBuilder(String name, long value) {
super(name, (Object) value);
}
/** @see BaseTermQueryBuilder#BaseTermQueryBuilder(String, float) */
public SpanTermQueryBuilder(String name, float value) {
super(name, (Object) value);
}
/** @see BaseTermQueryBuilder#BaseTermQueryBuilder(String, double) */
public SpanTermQueryBuilder(String name, double value) {
super(name, (Object) value);
}
/** @see BaseTermQueryBuilder#BaseTermQueryBuilder(String, Object) */
public SpanTermQueryBuilder(String name, Object value) {
super(name, value);
}
/**
* Read from a stream.
*/
public SpanTermQueryBuilder(StreamInput in) throws IOException {
super(in);
}
@Override
protected SpanQuery doToQuery(QueryShardContext context) throws IOException {
MappedFieldType mapper = context.fieldMapper(fieldName);
Term term;
if (mapper == null) {
term = new Term(fieldName, BytesRefs.toBytesRef(value));
} else {
Query termQuery = mapper.termQuery(value, context);
term = MappedFieldType.extractTerm(termQuery);
}
return new SpanTermQuery(term);
}
public static SpanTermQueryBuilder fromXContent(QueryParseContext parseContext) throws IOException, ParsingException {
XContentParser parser = parseContext.parser();
XContentParser.Token token = parser.currentToken();
if (token == XContentParser.Token.START_OBJECT) {
token = parser.nextToken();
}
assert token == XContentParser.Token.FIELD_NAME;
String fieldName = parser.currentName();
Object value = null;
float boost = AbstractQueryBuilder.DEFAULT_BOOST;
String queryName = null;
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 (parseContext.getParseFieldMatcher().match(currentFieldName, TERM_FIELD)) {
value = parser.objectBytes();
} else if (parseContext.getParseFieldMatcher().match(currentFieldName, BaseTermQueryBuilder.VALUE_FIELD)) {
value = parser.objectBytes();
} else if (parseContext.getParseFieldMatcher().match(currentFieldName, AbstractQueryBuilder.BOOST_FIELD)) {
boost = parser.floatValue();
} else if (parseContext.getParseFieldMatcher().match(currentFieldName, AbstractQueryBuilder.NAME_FIELD)) {
queryName = parser.text();
} else {
throw new ParsingException(parser.getTokenLocation(),
"[span_term] query does not support [" + currentFieldName + "]");
}
}
}
parser.nextToken();
} else {
value = parser.objectBytes();
// move to the next token
parser.nextToken();
}
if (value == null) {
throw new ParsingException(parser.getTokenLocation(), "No value specified for term query");
}
SpanTermQueryBuilder result = new SpanTermQueryBuilder(fieldName, value);
result.boost(boost).queryName(queryName);
return result;
}
@Override
public String getWriteableName() {
return NAME;
}
}
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