org.teiid.query.sql.lang.NotCriteria Maven / Gradle / Ivy
/*
* Copyright Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags and
* the COPYRIGHT.txt file distributed with this work.
*
* 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.teiid.query.sql.lang;
import org.teiid.core.util.EquivalenceUtil;
import org.teiid.core.util.HashCodeUtil;
import org.teiid.query.sql.*;
/**
* A logical criteria that takes the logical NOT of the contained criteria.
* That is, if the contained criteria returns true, this criteria returns
* false. For example: "NOT (element = 5)"
*/
public class NotCriteria extends AtomicCriteria {
/**
* Constructs a default instance of this class.
*/
public NotCriteria() {
}
/**
* Constructs an instance of this class with sub-criteria.
* @param crit Contained criteria
*/
public NotCriteria(Criteria crit) {
super(crit);
}
public void acceptVisitor(LanguageVisitor visitor) {
visitor.visit(this);
}
/**
* Compare equality of two AtomicCriteria.
* @param obj Other object
* @return True if equivalent
*/
public boolean equals(Object obj) {
if(obj == this) {
return true;
}
if(!(obj instanceof NotCriteria)) {
return false;
}
return EquivalenceUtil.areEqual(getCriteria(), ((NotCriteria)obj).getCriteria());
}
/**
* Get hash code
* @return Hash code
*/
public int hashCode() {
return HashCodeUtil.hashCode(0, getCriteria());
}
/**
* Deep copy of object
* @return Deep copy of object
*/
public Object clone() {
return new NotCriteria( (Criteria) getCriteria().clone() );
}
}