/*
* 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.query.sql.lang.PredicateCriteria.Negatable;
import org.teiid.query.sql.symbol.Expression;
/**
* This is an abstract class to define some common functionality in the two varieties of
* IN criteria: {@link SetCriteria} (where values are specified) and {@link SubquerySetCriteria}
* (where a subquery is defined and will supply the values for the IN set).
*/
public abstract class AbstractSetCriteria extends PredicateCriteria implements Negatable {
/** The left expression */
private Expression expression;
/** Negation flag. Indicates whether the criteria expression contains a NOT. */
private boolean negated = false;
/**
* Constructor for AbstractSetCriteria.
*/
protected AbstractSetCriteria() {
super();
}
/**
* Gets the membership expression to be compared.
* @return The membership expression
*/
public Expression getExpression() {
return this.expression;
}
/**
* Sets the membership expression
* @param expression The membership expression
*/
public void setExpression(Expression expression) {
this.expression = expression;
}
/**
* Returns whether this criteria is negated.
* @return flag indicating whether this criteria contains a NOT
*/
public boolean isNegated() {
return negated;
}
/**
* Sets the negation flag for this criteria.
* @param negationFlag true if this criteria contains a NOT; false otherwise
*/
public void setNegated(boolean negationFlag) {
negated = negationFlag;
}
@Override
public void negate() {
this.negated = !this.negated;
}
/**
* Deep copy of object
* @return Deep copy of object
*/
public abstract Object clone();
}