/*
* Copyright 2011 Revelytix, 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.mulgara.query;
import org.apache.log4j.Logger;
/**
* Basic functionality for an Answer.
*/
public abstract class AbstractAnswer implements Answer {
private static final Logger logger = Logger.getLogger(AbstractAnswer.class.getName());
/**
* Clone method so that subtypes are able to call super.
*/
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException e) {
throw new RuntimeException("Unable to clone a " + getClass().toString(), e);
}
}
public boolean equals(Object object) {
if ((object != null) && (object instanceof Answer)) {
try {
return AnswerOperations.equal(this, (Answer) object);
} catch (TuplesException e) {
logger.fatal("Couldn't test equality of answers", e);
}
}
return false;
}
/**
* Added to match {@link #equals(Object)}.
*/
public int hashCode() {
return AnswerOperations.hashCode(this);
}
}