| /* |
| * Copyright (c) 2006, 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: |
| // Oracle - initial API and implementation |
| // |
| package org.eclipse.persistence.jpa.jpql.parser; |
| |
| import org.eclipse.persistence.jpa.jpql.WordParser; |
| |
| /** |
| * This {@link AndExpression} creates a new {@link AdditionExpression} when the portion of the query |
| * to parse starts with <b>AND</b>. |
| * |
| * @see AndExpression |
| * |
| * @version 2.4 |
| * @since 2.3 |
| * @author Pascal Filion |
| */ |
| public final class AndExpressionFactory extends ExpressionFactory { |
| |
| /** |
| * This {@link ExpressionVisitor} is used to check if the {@link Expression} |
| * passed to this factory is an {@link OrExpression}. |
| */ |
| private OrExpressionVisitor visitor; |
| |
| /** |
| * The unique identifier of this {@link AndExpression}. |
| */ |
| public static final String ID = Expression.AND; |
| |
| /** |
| * Creates a new <code>AndExpressionFactory</code>. |
| */ |
| public AndExpressionFactory() { |
| super(ID, Expression.AND); |
| } |
| |
| @Override |
| @SuppressWarnings("null") |
| protected AbstractExpression buildExpression(AbstractExpression parent, |
| WordParser wordParser, |
| String word, |
| JPQLQueryBNF queryBNF, |
| AbstractExpression expression, |
| boolean tolerant) { |
| |
| if (expression != null) { |
| expression.accept(visitor()); |
| } |
| |
| if ((visitor != null) && visitor.found) { |
| visitor.found = false; |
| OrExpression orExpression = (OrExpression) expression; |
| |
| AndExpression andExpression = new AndExpression(parent); |
| andExpression.setLeftExpression((AbstractExpression) orExpression.getRightExpression()); |
| andExpression.parse(wordParser, tolerant); |
| orExpression.setRightExpression(andExpression); |
| |
| return orExpression; |
| } |
| else { |
| AndExpression andExpression = new AndExpression(parent); |
| |
| if (expression != null) { |
| andExpression.setLeftExpression(expression); |
| } |
| |
| andExpression.parse(wordParser, tolerant); |
| return andExpression; |
| } |
| } |
| |
| private OrExpressionVisitor visitor() { |
| if (visitor == null) { |
| visitor = new OrExpressionVisitor(); |
| } |
| return visitor; |
| } |
| |
| // Made static final for performance reasons. |
| /** |
| * This {@link ExpressionVisitor} is used to check if the {@link Expression} passed to this |
| * factory is an {@link OrExpression}. |
| */ |
| private static final class OrExpressionVisitor extends AbstractExpressionVisitor { |
| |
| /** |
| * This flag is turned on if the {@link Expression} visited is {@link OrExpression}. |
| */ |
| boolean found; |
| |
| @Override |
| public void visit(OrExpression expression) { |
| found = true; |
| } |
| } |
| } |