org.eclipse.persistence.internal.jpa.querydef.FunctionExpressionImpl Maven / Gradle / Ivy
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/*
* Copyright (c) 2011, 2021 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:
// Gordon Yorke - Initial development
//
package org.eclipse.persistence.internal.jpa.querydef;
import java.util.ArrayList;
import java.util.List;
import jakarta.persistence.criteria.Expression;
import jakarta.persistence.metamodel.Metamodel;
/**
*
* Purpose: Contains the implementation of the Predicate interface of the JPA
* criteria API.
*
* Description: The predicate forms the least specific expression node. Predicates
* result in boolean expressions that are combined to form the final expression.
*
* @see jakarta.persistence.criteria Predicate
*
* @author gyorke
* @since EclipseLink 1.2
*/
public class FunctionExpressionImpl extends ExpressionImpl{
protected String operator;
protected List> expressions;
protected FunctionExpressionImpl (Metamodel metamodel, Class resultClass, org.eclipse.persistence.expressions.Expression expressionNode, List> compoundExpressions){
super(metamodel, resultClass, expressionNode);
this.expressions = compoundExpressions != null ? compoundExpressions : new ArrayList<>();
}
public FunctionExpressionImpl (Metamodel metamodel, Class resultClass, org.eclipse.persistence.expressions.Expression expressionNode, List> compoundExpressions, String operator){
this(metamodel, resultClass, expressionNode, compoundExpressions);
this.operator = operator;
}
/**
* Return the top-level conjuncts or disjuncts of the predicate.
*
* @return list boolean expressions forming the predicate
*/
public List> getChildExpressions(){
return expressions;
}
/**
* @return the operator
*/
public String getOperation() {
return operator;
}
@Override
public boolean isCompoundExpression(){
return true;
}
@Override
public boolean isExpression(){
return false;
}
@Override
public void findRootAndParameters(CommonAbstractCriteriaImpl query){
if (this.expressions != null){
for (Object exp : this.expressions){
((InternalSelection)exp).findRootAndParameters(query);
}
}
}
}