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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.search.fetch.subphase;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.search.lookup.SourceLookup;
import java.io.IOException;
public final class FetchSourceSubPhase implements FetchSubPhase {
@Override
public void hitExecute(SearchContext context, HitContext hitContext) {
if (context.sourceRequested() == false) {
return;
}
SourceLookup source = context.lookup().source();
FetchSourceContext fetchSourceContext = context.fetchSourceContext();
assert fetchSourceContext.fetchSource();
if (fetchSourceContext.includes().length == 0 && fetchSourceContext.excludes().length == 0) {
hitContext.hit().sourceRef(source.internalSourceRef());
return;
}
if (source.internalSourceRef() == null) {
throw new IllegalArgumentException("unable to fetch fields from _source field: _source is disabled in the mappings " +
"for index [" + context.indexShard().shardId().getIndexName() + "]");
}
final Object value = source.filter(fetchSourceContext);
try {
final int initialCapacity = Math.min(1024, source.internalSourceRef().length());
BytesStreamOutput streamOutput = new BytesStreamOutput(initialCapacity);
XContentBuilder builder = new XContentBuilder(source.sourceContentType().xContent(), streamOutput);
builder.value(value);
hitContext.hit().sourceRef(builder.bytes());
} catch (IOException e) {
throw new ElasticsearchException("Error filtering source", e);
}
}
}
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