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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.search.Query;
import org.apache.lucene.search.spans.SpanContainingQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
import java.util.Objects;
/**
* Builder for {@link org.apache.lucene.search.spans.SpanContainingQuery}.
*/
public class SpanContainingQueryBuilder extends AbstractQueryBuilder<SpanContainingQueryBuilder>
implements SpanQueryBuilder<SpanContainingQueryBuilder> {
public static final String NAME = "span_containing";
public static final ParseField QUERY_NAME_FIELD = new ParseField(NAME);
private static final ParseField BIG_FIELD = new ParseField("big");
private static final ParseField LITTLE_FIELD = new ParseField("little");
private final SpanQueryBuilder<?> big;
private final SpanQueryBuilder<?> little;
/**
* @param big the big clause, it must enclose {@code little} for a match.
* @param little the little clause, it must be contained within {@code big} for a match.
*/
public SpanContainingQueryBuilder(SpanQueryBuilder<?> big, SpanQueryBuilder<?> little) {
if (big == null) {
throw new IllegalArgumentException("inner clause [big] cannot be null.");
}
if (little == null) {
throw new IllegalArgumentException("inner clause [little] cannot be null.");
}
this.little = little;
this.big = big;
}
/**
* Read from a stream.
*/
public SpanContainingQueryBuilder(StreamInput in) throws IOException {
super(in);
big = (SpanQueryBuilder<?>) in.readQuery();
little = (SpanQueryBuilder<?>) in.readQuery();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeQuery(big);
out.writeQuery(little);
}
/**
* @return the big clause, it must enclose {@code little} for a match.
*/
public SpanQueryBuilder bigQuery() {
return this.big;
}
/**
* @return the little clause, it must be contained within {@code big} for a match.
*/
public SpanQueryBuilder littleQuery() {
return this.little;
}
@Override
protected void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(NAME);
builder.field(BIG_FIELD.getPreferredName());
big.toXContent(builder, params);
builder.field(LITTLE_FIELD.getPreferredName());
little.toXContent(builder, params);
printBoostAndQueryName(builder);
builder.endObject();
}
public static SpanContainingQueryBuilder fromXContent(QueryParseContext parseContext) throws IOException {
XContentParser parser = parseContext.parser();
float boost = AbstractQueryBuilder.DEFAULT_BOOST;
String queryName = null;
SpanQueryBuilder<?> big = null;
SpanQueryBuilder<?> little = null;
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 (parseContext.parseFieldMatcher().match(currentFieldName, BIG_FIELD)) {
QueryBuilder query = parseContext.parseInnerQueryBuilder();
if (!(query instanceof SpanQueryBuilder<?>)) {
throw new ParsingException(parser.getTokenLocation(), "span_containing [big] must be of type span query");
}
big = (SpanQueryBuilder<?>) query;
} else if (parseContext.parseFieldMatcher().match(currentFieldName, LITTLE_FIELD)) {
QueryBuilder query = parseContext.parseInnerQueryBuilder();
if (!(query instanceof SpanQueryBuilder<?>)) {
throw new ParsingException(parser.getTokenLocation(), "span_containing [little] must be of type span query");
}
little = (SpanQueryBuilder<?>) query;
} else {
throw new ParsingException(parser.getTokenLocation(),
"[span_containing] query does not support [" + currentFieldName + "]");
}
} else if (parseContext.parseFieldMatcher().match(currentFieldName, AbstractQueryBuilder.BOOST_FIELD)) {
boost = parser.floatValue();
} else if (parseContext.parseFieldMatcher().match(currentFieldName, AbstractQueryBuilder.NAME_FIELD)) {
queryName = parser.text();
} else {
throw new ParsingException(parser.getTokenLocation(),
"[span_containing] query does not support [" + currentFieldName + "]");
}
}
SpanContainingQueryBuilder query = new SpanContainingQueryBuilder(big, little);
query.boost(boost).queryName(queryName);
return query;
}
@Override
protected Query doToQuery(QueryShardContext context) throws IOException {
Query innerBig = big.toQuery(context);
assert innerBig instanceof SpanQuery;
Query innerLittle = little.toQuery(context);
assert innerLittle instanceof SpanQuery;
return new SpanContainingQuery((SpanQuery) innerBig, (SpanQuery) innerLittle);
}
@Override
protected int doHashCode() {
return Objects.hash(big, little);
}
@Override
protected boolean doEquals(SpanContainingQueryBuilder other) {
return Objects.equals(big, other.big) &&
Objects.equals(little, other.little);
}
@Override
public String getWriteableName() {
return NAME;
}
}
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