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/*
 * The contents of this file are subject to the terms 
 * of the Common Development and Distribution License 
 * (the "License").  You may not use this file except 
 * in compliance with the License.
 * 
 * You can obtain a copy of the license at 
 * glassfish/bootstrap/legal/CDDLv1.0.txt or 
 * https://glassfish.dev.java.net/public/CDDLv1.0.html. 
 * See the License for the specific language governing 
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL 
 * HEADER in each file and include the License file at 
 * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable, 
 * add the following below this CDDL HEADER, with the 
 * fields enclosed by brackets "[]" replaced with your 
 * own identifying information: Portions Copyright [yyyy] 
 * [name of copyright owner]
 */
// Copyright (c) 1998, 2007, Oracle. All rights reserved.  
package oracle.toplink.essentials.internal.parsing;

import oracle.toplink.essentials.queryframework.ObjectLevelReadQuery;
import oracle.toplink.essentials.queryframework.ReportQuery;
import oracle.toplink.essentials.expressions.Expression;

/**
 * INTERNAL
 * 

Purpose: Model a MAX *

Responsibilities:

    *
  • Apply itself to a query correctly *
*/ public class MaxNode extends AggregateNode { /** * INTERNAL * Apply this node to the passed query */ public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) { if (theQuery.isReportQuery()) { ReportQuery reportQuery = (ReportQuery)theQuery; reportQuery.addAttribute(resolveAttribute(), generateExpression(context)); } } /** * INTERNAL * Validate node and calculate its type. */ public void validate(ParseTreeContext context) { if (left != null) { left.validate(context); setType(left.getType()); } } /** * INTERNAL */ protected Expression addAggregateExression(Expression expr) { return expr.maximum(); } /** * INTERNAL * Get the string representation of this node. */ public String getAsString() { return "MAX(" + left.getAsString() + ")"; } }




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