Hibernate example source code file (AbstractSelectExpression.java)

This example Hibernate source code file (AbstractSelectExpression.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

abstractselectexpression, fromelement, fromelement, hqlsqlwalkernode, moved, moved, selectclause, selectexpression, semanticexception, semanticexception, string, string, type

The Hibernate AbstractSelectExpression.java source code

/*
 * 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;
	}
}