Hibernate example source code file (Sybase11JoinFragment.java)

This example Hibernate source code file (Sybase11JoinFragment.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

joinfragment, joinfragment, jointype, string, string, stringbuffer, stringbuffer, sybase11joinfragment, sybase11joinfragment, unsupportedoperationexception

The Hibernate Sybase11JoinFragment.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.sql;



/**
 * An old Sybase-style join (before Sybase supported the ANSI style "inner join" etc syntax)
 * This is needed for Sybase 11.9.2 and earlier, using the HQL 2.* syntax with Collections.
 *
 * @author Colm O' Flaherty
 */
public class Sybase11JoinFragment extends JoinFragment {

	private StringBuffer afterFrom = new StringBuffer();
	private StringBuffer afterWhere = new StringBuffer();

	public void addJoin(String tableName, String alias, String[] fkColumns, String[] pkColumns, JoinType joinType) {

		addCrossJoin(tableName, alias);

		for ( int j=0; j<fkColumns.length; j++) {
			//full joins are not supported.. yet!
			if (joinType==JoinType.FULL_JOIN ) throw new UnsupportedOperationException();

			afterWhere.append(" and ")
				.append( fkColumns[j] )
				.append( " " );

			if (joinType==JoinType.LEFT_OUTER_JOIN ) afterWhere.append("*");
			afterWhere.append('=');
			if (joinType==JoinType.RIGHT_OUTER_JOIN ) afterWhere.append("*");

			afterWhere.append (" ")
				.append(alias)
				.append('.')
				.append( pkColumns[j] );
		}

	}

	public String toFromFragmentString() {
		return afterFrom.toString();
	}

	public String toWhereFragmentString() {
		return afterWhere.toString();
	}

	public void addJoins(String fromFragment, String whereFragment) {
		afterFrom.append(fromFragment);
		afterWhere.append(whereFragment);
	}

	public JoinFragment copy() {
		Sybase11JoinFragment copy = new Sybase11JoinFragment();
		copy.afterFrom = new StringBuffer( afterFrom.toString() );
		copy.afterWhere = new StringBuffer( afterWhere.toString() );
		return copy;
	}

	public void addCondition(String alias, String[] columns, String condition) {
		for ( int i=0; i<columns.length; i++ ) {
			afterWhere.append(" and ")
				.append(alias)
				.append('.')
				.append( columns[i] )
				.append(condition);
		}
	}

	public void addCrossJoin(String tableName, String alias) {
		afterFrom.append(", ")
			.append(tableName)
			.append(' ')
			.append(alias);
	}

	public void addCondition(String alias, String[] fkColumns, String[] pkColumns) {
		throw new UnsupportedOperationException();

	}

	public boolean addCondition(String condition) {
		return addCondition(afterWhere, condition);
	}


	public void addFromFragmentString(String fromFragmentString) {
		afterFrom.append(fromFragmentString);
	}


	public void addJoin(String tableName, String alias, String[] fkColumns, String[] pkColumns, JoinType joinType, String on) {
		addJoin(tableName, alias, fkColumns, pkColumns, joinType);
		addCondition(on);
	}
}