com.hazelcast.query.impl.getters.PortableGetter 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.PortableContext;
import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.internal.serialization.impl.DefaultPortableReader;
import com.hazelcast.nio.serialization.ClassDefinition;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.FieldDefinition;
import com.hazelcast.nio.serialization.PortableReader;
final class PortableGetter extends Getter {
private final SerializationService serializationService;
public PortableGetter(SerializationService serializationService) {
super(null);
this.serializationService = serializationService;
}
@Override
Object getValue(Object target, String fieldPath) throws Exception {
Data data = (Data) target;
PortableContext context = serializationService.getPortableContext();
PortableReader reader = serializationService.createPortableReader(data);
ClassDefinition classDefinition = context.lookupClassDefinition(data);
FieldDefinition fieldDefinition = context.getFieldDefinition(classDefinition, fieldPath);
if (fieldDefinition != null) {
return ((DefaultPortableReader) reader).read(fieldPath);
} else {
return null;
}
}
@Override
Object getValue(Object obj) throws Exception {
throw new IllegalArgumentException("Path agnostic value extraction unsupported");
}
@Override
Class getReturnType() {
throw new IllegalArgumentException("Non applicable for PortableGetter");
}
@Override
boolean isCacheable() {
// Non-cacheable since it's a generic getter and the cache shouldn't be polluted with the same instance
// for various keys. A singleton should be used instead during getter creation.
return false;
}
}