org.eclipse.persistence.jpa.jpql.parser.LengthExpression Maven / Gradle / Ivy
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/*
* Copyright (c) 2006, 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
//
package org.eclipse.persistence.jpa.jpql.parser;
/**
* The LENGTH function returns the length of the string in characters as an integer.
*
* JPA 1.0, 2.0:
*
BNF: expression ::= LENGTH(string_primary)
*
* JPA 2.1:
*
BNF: expression ::= LENGTH(string_expression)
*
*
* @version 2.5
* @since 2.3
* @author Pascal Filion
*/
public final class LengthExpression extends AbstractSingleEncapsulatedExpression {
/**
* Creates a new LengthExpression.
*
* @param parent The parent of this expression
*/
public LengthExpression(AbstractExpression parent) {
super(parent, LENGTH);
}
/**
* {@inheritDoc}
*/
public void accept(ExpressionVisitor visitor) {
visitor.visit(this);
}
/**
* {@inheritDoc}
*/
@Override
public String getEncapsulatedExpressionQueryBNFId() {
return InternalLengthExpressionBNF.ID;
}
/**
* {@inheritDoc}
*/
public JPQLQueryBNF getQueryBNF() {
return getQueryBNF(FunctionsReturningNumericsBNF.ID);
}
}