| /* |
| * 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 org.eclipse.persistence.expressions.*; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Represent a LIKE in EJBQL |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Generate the correct expression for a LIKE |
| * </ul> |
| * @author Jon Driscoll and Joel Lucuik |
| * @since TopLink 4.0 |
| */ |
| public class LikeNode extends SimpleConditionalExpressionNode { |
| private EscapeNode escape = null; |
| |
| /** |
| * LikeNode constructor comment. |
| */ |
| public LikeNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Validate the current node and calculates its type. |
| */ |
| @Override |
| public void validate(ParseTreeContext context) { |
| TypeHelper typeHelper = context.getTypeHelper(); |
| if (left != null) { |
| left.validate(context); |
| left.validateParameter(context, typeHelper.getStringType()); |
| } |
| if (right != null) { |
| right.validate(context); |
| right.validateParameter(context, typeHelper.getStringType()); |
| } |
| |
| if (escape != null) { |
| escape.validate(context); |
| } |
| |
| setType(typeHelper.getBooleanType()); |
| } |
| |
| /** |
| * INTERNAL |
| * Return a EclipseLink expression for this node. |
| */ |
| @Override |
| public Expression generateExpression(GenerationContext context) { |
| Expression whereClause = getLeft().generateExpression(context); |
| if (!hasEscape()) { |
| whereClause = whereClause.like(getRight().generateExpression(context)); |
| } else { |
| whereClause = whereClause.like(getRight().generateExpression(context), getEscapeNode().generateExpression(context)); |
| } |
| return whereClause; |
| } |
| |
| public boolean hasEscape() { |
| return getEscapeNode() != null; |
| } |
| |
| // Accessors |
| public EscapeNode getEscapeNode() { |
| return escape; |
| } |
| |
| public void setEscapeNode(EscapeNode node) { |
| escape = node; |
| } |
| } |