conditionfragment.java

hibernate-distribution-3.3.1.GA-dist.zip源码

/*
 * 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;

import org.hibernate.util.ArrayHelper;

/**
 * @author Gavin King
 */
public class ConditionFragment {
	private String tableAlias;
	private String[] lhs;
	private String[] rhs;
	private String op = "=";

	/**
	 * Sets the op.
	 * @param op The op to set
	 */
	public ConditionFragment setOp(String op) {
		this.op = op;
		return this;
	}

	/**
	 * Sets the tableAlias.
	 * @param tableAlias The tableAlias to set
	 */
	public ConditionFragment setTableAlias(String tableAlias) {
		this.tableAlias = tableAlias;
		return this;
	}

	public ConditionFragment setCondition(String[] lhs, String[] rhs) {
		this.lhs = lhs;
		this.rhs = rhs;
		return this;
	}

	public ConditionFragment setCondition(String[] lhs, String rhs) {
		this.lhs = lhs;
		this.rhs = ArrayHelper.fillArray(rhs, lhs.length);
		return this;
	}

	public String toFragmentString() {
		StringBuffer buf = new StringBuffer( lhs.length * 10 );
		for ( int i=0; i<lhs.length; i++ ) {
			buf.append(tableAlias)
				.append('.')
				.append( lhs[i] )
				.append(op)
				.append( rhs[i] );
			if (i<lhs.length-1) buf.append(" and ");
		}
		return buf.toString();
	}

}