com.hazelcast.query.impl.getters.ExtractorGetter Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.query.impl.getters;
import com.hazelcast.internal.serialization.InternalSerializationService;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.query.extractor.ValueExtractor;
import com.hazelcast.query.impl.DefaultValueCollector;
final class ExtractorGetter extends Getter {
private final ValueExtractor extractor;
private final Object arguments;
private final InternalSerializationService serializationService;
ExtractorGetter(InternalSerializationService serializationService, ValueExtractor extractor, Object arguments) {
super(null);
this.extractor = extractor;
this.arguments = arguments;
this.serializationService = serializationService;
}
@Override
@SuppressWarnings("unchecked")
Object getValue(Object target) throws Exception {
Object extractionTarget = target;
// This part will be improved in 3.7 to avoid extra allocation
DefaultValueCollector collector = new DefaultValueCollector();
if (target instanceof Data) {
extractionTarget = serializationService.createPortableReader((Data) target);
}
extractor.extract(extractionTarget, arguments, collector);
return collector.getResult();
}
@Override
Class getReturnType() {
throw new UnsupportedOperationException();
}
@Override
boolean isCacheable() {
return true;
}
}