/*
* 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.language;
import org.teiid.language.visitor.LanguageObjectVisitor;
public class SetQuery extends QueryExpression {
public enum Operation {
/** Represents UNION of two queries */
UNION,
/** Represents intersection of two queries */
INTERSECT,
/** Represents set difference of two queries */
EXCEPT
}
private boolean all;
private QueryExpression leftQuery;
private QueryExpression rightQuery;
private Operation operation;
/**
* @see org.teiid.language.QueryExpression#getProjectedQuery()
*/
public Select getProjectedQuery() {
if (leftQuery instanceof Select) {
return (Select)leftQuery;
}
return leftQuery.getProjectedQuery();
}
/**
* @see org.teiid.language.SetQuery#getLeftQuery()
*/
public QueryExpression getLeftQuery() {
return leftQuery;
}
/**
* @see org.teiid.language.SetQuery#getOperation()
*/
public Operation getOperation() {
return operation;
}
/**
* @see org.teiid.language.SetQuery#getRightQuery()
*/
public QueryExpression getRightQuery() {
return rightQuery;
}
/**
* @see org.teiid.language.SetQuery#isAll()
*/
public boolean isAll() {
return all;
}
/**
* @see org.teiid.language.SetQuery#setAll(boolean)
*/
public void setAll(boolean all) {
this.all = all;
}
/**
* @see org.teiid.language.SetQuery#setLeftQuery(org.teiid.language.QueryExpression)
*/
public void setLeftQuery(QueryExpression leftQuery) {
this.leftQuery = leftQuery;
}
/**
* @see org.teiid.language.SetQuery#setOperation(org.teiid.language.SetQuery.Operation)
*/
public void setOperation(Operation operation) {
this.operation = operation;
}
/**
* @see org.teiid.language.SetQuery#setRightQuery(org.teiid.language.QueryExpression)
*/
public void setRightQuery(QueryExpression rightQuery) {
this.rightQuery = rightQuery;
}
public void acceptVisitor(LanguageObjectVisitor visitor) {
visitor.visit(this);
}
}