| /* |
| * 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: |
| // Oracle - initial API and implementation |
| // |
| package org.eclipse.persistence.jpa.jpql.tools.model.query; |
| |
| import static org.eclipse.persistence.jpa.jpql.parser.Expression.OR; |
| |
| import org.eclipse.persistence.jpa.jpql.parser.ConditionalExpressionBNF; |
| import org.eclipse.persistence.jpa.jpql.parser.ConditionalTermBNF; |
| import org.eclipse.persistence.jpa.jpql.parser.OrExpression; |
| |
| /** |
| * The <code><b>OR</b></code> logical operator chains multiple criteria together. A valid operand |
| * of an <code><b>OR</b></code> operator must be one of: <code><b>TRUE</b></code>, |
| * <code><b>FALSE</b></code>, and <code><b>NULL</b></code>. The <code><b>OR</b></code> operator has |
| * a lower precedence than the <code><b>AND</b></code> operator. |
| * <p> |
| * <code><b>NULL</b></code> represents unknown. Therefore, if one operand is <code><b>NULL</b></code> |
| * and the other operand is <code><b>TRUE</b></code> the result is <code><b>TRUE</b></code>, because |
| * one <code><b>TRUE</b></code> operand is sufficient for a <code><b>TRUE</b></code> result. If one |
| * operand is <code><b>NULL</b></code> and the other operand is either <code><b>FALSE</b></code> or |
| * <code><b>NULL</b></code>, the result is <code><b>NULL</b></code> (unknown). |
| * <p> |
| * |
| * <table border="1" style="border:1px outset darkgrey;"> |
| * <caption>The following table shows how the <code><b>OR</b></code> operator is evaluated based on its two operands:</caption> |
| * <tr><td></td><td><b>TRUE</b></td><td><b>FALSE</b></td><td><b>NULL</b></td></tr> |
| * <tr><td><b>TRUE</b></td><td>TRUE</td><td>TRUE</td><td>TRUE</td></tr> |
| * <tr><td><b>FALSE</b></td><td>TRUE</td><td>FALSE</td><td>NULL</td></tr> |
| * <tr><td><b>NULL</b></td><td>TRUE</td><td>NULL</td><td>NULL</td></tr> |
| * </table> |
| * |
| * <div><p><b>BNF:</b> <code>conditional_expression ::= conditional_expression OR conditional_term</code></p></div> |
| * |
| * @see OrExpression |
| * |
| * @version 2.4 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| public class OrExpressionStateObject extends LogicalExpressionStateObject { |
| |
| /** |
| * Creates a new <code>OrExpressionStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| public OrExpressionStateObject(StateObject parent) { |
| super(parent); |
| } |
| |
| /** |
| * Creates a new <code>OrExpressionStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @param leftStateObject The {@link StateObject} representing the left expression |
| * @param rightStateObject The {@link StateObject} representing the right expression |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| public OrExpressionStateObject(StateObject parent, |
| StateObject leftStateObject, |
| StateObject rightStateObject) { |
| |
| super(parent, leftStateObject, rightStateObject); |
| } |
| |
| /** |
| * Creates a new <code>OrExpressionStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @param leftJpqlFragment The string representation of the left expression to parse and to |
| * convert into a {@link StateObject} |
| * @param rightJpqlFragment The string representation of the right expression to parse and to |
| * convert into a {@link StateObject} |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| public OrExpressionStateObject(StateObject parent, |
| String leftJpqlFragment, |
| String rightJpqlFragment) { |
| |
| super(parent, leftJpqlFragment, rightJpqlFragment); |
| } |
| |
| @Override |
| public void accept(StateObjectVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public OrExpression getExpression() { |
| return (OrExpression) super.getExpression(); |
| } |
| |
| @Override |
| public String getIdentifier() { |
| return OR; |
| } |
| |
| @Override |
| protected String getLeftQueryBNFId() { |
| return ConditionalExpressionBNF.ID; |
| } |
| |
| @Override |
| protected String getRightQueryBNFId() { |
| return ConditionalTermBNF.ID; |
| } |
| |
| /** |
| * Keeps a reference of the {@link OrExpression parsed object} object, which should only be |
| * done when this object is instantiated during the conversion of a parsed JPQL query into |
| * {@link StateObject StateObjects}. |
| * |
| * @param expression The {@link OrExpression parsed object} representing a logical |
| * <code><b>OR</b></code> expression |
| */ |
| public void setExpression(OrExpression expression) { |
| super.setExpression(expression); |
| } |
| } |