All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.eclipse.persistence.internal.jpa.querydef.PredicateImpl Maven / Gradle / Ivy

There is a newer version: 5.0.0-B03
Show newest version
/*
 * Copyright (c) 2011, 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:
//     Gordon Yorke - Initial development
//
package org.eclipse.persistence.internal.jpa.querydef;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.criteria.Expression;
import javax.persistence.criteria.Predicate;
import javax.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 javax.persistence.criteria Predicate * * @author gyorke * @since EclipseLink 1.2 */ public class PredicateImpl extends CompoundExpressionImpl implements Predicate { protected BooleanOperator booloperator; public PredicateImpl (Metamodel metamodel, org.eclipse.persistence.expressions.Expression expressionNode, List> parentExpressions, BooleanOperator operator){ super(metamodel, expressionNode, parentExpressions); this.booloperator = operator; } /** * INTERNAL: * This method returns null if this is not a conjunction/disjunction * TRUE if this is a conjunction, FALSE for disjunction. */ public Boolean getJunctionValue() { if (this.currentNode != null) { return null; } return this.getOperator() == BooleanOperator.AND; } @Override /** * Return the boolean operator for the predicate. If the predicate is * simple, this is AND. * * @return boolean operator for the predicate */ public BooleanOperator getOperator(){ return this.booloperator; } /** * Return the top-level conjuncts or disjuncts of the predicate. * * @return list boolean expressions forming the predicate */ public List> getExpressions(){ return (List>) this.expressions; } /** * Apply negation to the predicate. * * @return the negated predicate */ public Predicate not(){ PredicateImpl predicateImpl = null; if (isJunction()) { if (getJunctionValue()) { predicateImpl = new PredicateImpl(this.metamodel, null, null, BooleanOperator.OR); } else { predicateImpl = new PredicateImpl(this.metamodel, null, null, BooleanOperator.AND); } predicateImpl.setIsNegated(true); return predicateImpl; } List> list = new ArrayList(); list.add(this); predicateImpl = new PredicateImpl(this.metamodel, this.currentNode.not(), list, this.booloperator); predicateImpl.setIsNegated(true); return predicateImpl; } /** * @param operator the operator to set */ public void setOperator(BooleanOperator operator) { this.booloperator = operator; } @Override public boolean isJunction(){ return this.currentNode == null; } @Override public boolean isCompoundExpression(){ return false; } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy