/**
* Copyright 2010 JBoss Inc
*
* 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 org.drools.base.extractors;
import org.drools.base.ValueType;
import org.drools.common.InternalWorkingMemory;
/**
* A special field extractor for the self reference "this".
*
* @author etirelli
*/
public class SelfReferenceClassFieldReader extends BaseObjectClassFieldReader {
private static final long serialVersionUID = 510l;
public SelfReferenceClassFieldReader(final Class<?> clazz,
final String fieldName) {
super( -1, // index
clazz, // fieldType
ValueType.determineValueType( clazz ) ); // value type
}
public Object getValue(InternalWorkingMemory workingMemory, final Object object) {
//return (object instanceof ShadowProxy) ? ((ShadowProxy) object).getShadowedObject() : object;
return object;
}
public boolean isNullValue(InternalWorkingMemory workingMemory, final Object object) {
return getValue( workingMemory, object ) == null;
}
@Override
public boolean isSelfReference() {
return true;
}
}