org.eclipse.persistence.internal.history.UniversalAsOfClause Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2018 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 v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.internal.history;
import org.eclipse.persistence.history.*;
import org.eclipse.persistence.internal.expressions.*;
/**
* INTERNAL:
* Purpose: Represents a query level AS OF TIMESTAMP/SCN Oracle SQL clause.
* Responsibilities:
* - Will be applied to the entire selection criteria, even if
* it is only set on the Query's expression builder.
*
- Prints the AS OF clause before the alias name in the FROM clause.
*
* @since OracleAS TopLink 10g (10.0.3)
* @author Stephen McRitchie
*/
public class UniversalAsOfClause extends AsOfClause {
public UniversalAsOfClause(AsOfClause value) {
super(value);
}
/**
* INTERNAL:
* Prints the as of clause for an expression inside of the FROM clause.
*/
public void printSQL(ExpressionSQLPrinter printer) {
((AsOfClause)super.getValue()).printSQL(printer);
}
/**
* INTERNAL:
* Gets the actual as of clause represented by this.
*/
public AsOfClause getAsOfClause() {
return (AsOfClause)super.getValue();
}
public Object getValue() {
return getAsOfClause().getValue();
}
public boolean isUniversal() {
return true;
}
public String printString() {
return "Universal" + getAsOfClause().toString();
}
}