/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
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() );
}
}