/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.hql.internal.ast.tree;
import org.hibernate.type.Type;
import antlr.SemanticException;
/**
* Partial implementation of SelectExpression for all the nodes that aren't constructors.
*
* @author Joshua Davis
*/
public abstract class AbstractSelectExpression extends HqlSqlWalkerNode implements SelectExpression {
private String alias;
private int scalarColumnIndex = -1;
public final void setAlias(String alias) {
this.alias = alias;
}
public final String getAlias() {
return alias;
}
public boolean isConstructor() {
return false;
}
public boolean isReturnableEntity() throws SemanticException {
return false;
}
public FromElement getFromElement() {
return null;
}
public boolean isScalar() throws SemanticException {
// Default implementation:
// If this node has a data type, and that data type is not an association, then this is scalar.
Type type = getDataType();
return type != null && !type.isAssociationType(); // Moved here from SelectClause [jsd]
}
public void setScalarColumn(int i) throws SemanticException {
this.scalarColumnIndex = i;
setScalarColumnText( i );
}
public int getScalarColumnIndex() {
return scalarColumnIndex;
}
}