/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.jpa.parsing; | |
import java.sql.Date; | |
import java.sql.Time; | |
import java.sql.Timestamp; | |
import org.eclipse.persistence.queries.ObjectLevelReadQuery; | |
import org.eclipse.persistence.queries.ReportQuery; | |
import org.eclipse.persistence.expressions.*; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent a date function: CURRENT_DATE, CURRENT_TIME, | |
* CURRENT_TIMESTAMP. | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Generate the correct expression for the date function | |
* </ul> | |
*/ | |
public class DateFunctionNode extends FunctionalExpressionNode { | |
private Class type; | |
/** | |
* DateFunctionNode constructor. | |
*/ | |
public DateFunctionNode() { | |
super(); | |
} | |
/** | |
* INTERNAL | |
* Apply this node to the passed query | |
*/ | |
public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) { | |
if (theQuery.isReportQuery()){ | |
ReportQuery reportQuery = (ReportQuery)theQuery; | |
reportQuery.addAttribute("date", generateExpression(context), type); | |
} | |
} | |
/** | |
* INTERNAL | |
* Validate node and calculate its type. | |
*/ | |
public void validate(ParseTreeContext context) { | |
setType(type); | |
} | |
/** | |
* INTERNAL | |
* Generate the EclipseLink expression for this node | |
*/ | |
public Expression generateExpression(GenerationContext context) { | |
Expression expr = context.getBaseExpression(); | |
if (expr == null) { | |
expr = new ExpressionBuilder(); | |
} | |
Expression result = null; | |
if (type == Date.class) { | |
result = expr.currentDateDate(); | |
} else if (type == Time.class) { | |
result = expr.currentTime(); | |
} else if (type == Timestamp.class) { | |
result = expr.currentDate(); | |
} | |
return result; | |
} | |
/** */ | |
public void useCurrentDate() { | |
type = Date.class; | |
} | |
/** */ | |
public void useCurrentTime() { | |
type = Time.class; | |
} | |
/** */ | |
public void useCurrentTimestamp() { | |
type = Timestamp.class; | |
} | |
} |