| /* |
| * Copyright (c) 1998, 2020 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 from Oracle TopLink |
| package org.eclipse.persistence.internal.jpa.parsing; |
| |
| import java.util.*; |
| |
| import org.eclipse.persistence.expressions.*; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Represent an OR |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Generate the correct expression for an OR |
| * </ul> |
| * @author Jon Driscoll and Joel Lucuik |
| * @since TopLink 4.0 |
| */ |
| public class OrNode extends LogicalOperatorNode { |
| |
| private Set leftOuterScopeVariables = null; |
| private Set rightOuterScopeVariables = null; |
| |
| /** |
| * Return a new OrNode. |
| */ |
| public OrNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Validate node and calculate its type. |
| */ |
| @Override |
| public void validate(ParseTreeContext context) { |
| Set saved = context.getOuterScopeVariables(); |
| if (left != null) { |
| context.resetOuterScopeVariables(); |
| left.validate(context); |
| leftOuterScopeVariables = context.getOuterScopeVariables(); |
| } |
| if (right != null) { |
| context.resetOuterScopeVariables(); |
| right.validate(context); |
| rightOuterScopeVariables = context.getOuterScopeVariables(); |
| } |
| context.resetOuterScopeVariables(saved); |
| if ((left != null) && (right != null)) { |
| left.validateParameter(context, right.getType()); |
| right.validateParameter(context, left.getType()); |
| } |
| |
| TypeHelper typeHelper = context.getTypeHelper(); |
| setType(typeHelper.getBooleanType()); |
| } |
| |
| /** |
| * INTERNAL |
| * Return a EclipseLink expression by 'OR'ing the expressions from the left and right nodes |
| */ |
| @Override |
| public Expression generateExpression(GenerationContext context) { |
| // Get the left expression |
| Expression leftExpr = getLeft().generateExpression(context); |
| leftExpr = appendOuterScopeVariableJoins( |
| leftExpr, leftOuterScopeVariables, context); |
| |
| Expression rightExpr = getRight().generateExpression(context); |
| rightExpr = appendOuterScopeVariableJoins( |
| rightExpr, rightOuterScopeVariables, context); |
| |
| // Or it with whatever the right expression is |
| return leftExpr.or(rightExpr); |
| } |
| |
| /** |
| * INTERNAL |
| */ |
| private Expression appendOuterScopeVariableJoins( |
| Expression expr, Set outerScopeVariables, GenerationContext context) { |
| if ((outerScopeVariables == null) || outerScopeVariables.isEmpty()) { |
| // no outer scope variables => nothing to be done |
| return expr; |
| } |
| Expression joins = context.joinVariables(outerScopeVariables); |
| return appendExpression(expr, joins); |
| } |
| |
| } |