| /* |
| * 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; |
| |
| /** |
| * <p> |
| * <b>Purpose</b>: Contains the implementation of the Predicate interface of the JPA |
| * criteria API. |
| * <p> |
| * <b>Description</b>: 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<X> extends ExpressionImpl<X>{ |
| |
| protected String operator; |
| protected List expressions; |
| |
| protected <T> FunctionExpressionImpl (Metamodel metamodel, Class<X> resultClass, org.eclipse.persistence.expressions.Expression expressionNode, List<Expression<?>> compoundExpressions){ |
| super(metamodel, resultClass, expressionNode); |
| if (compoundExpressions != null){ |
| this.expressions = compoundExpressions; |
| }else{ |
| this.expressions = new ArrayList(); |
| } |
| } |
| |
| public <T> FunctionExpressionImpl (Metamodel metamodel, Class<X> resultClass, org.eclipse.persistence.expressions.Expression expressionNode, List<Expression<?>> 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<Expression<?>> 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); |
| } |
| } |
| } |
| } |