| /* |
| * 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.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.persistence.expressions.*; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Represent a CONCAT in EJBQL |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Generate the correct expression for a CONCAT in EJBQL |
| * </ul> |
| * @author Jon Driscoll and Joel Lucuik |
| * @since TopLink 4.0 |
| */ |
| public class ConcatNode extends StringFunctionNode { |
| |
| protected List objects = null; |
| |
| /** |
| * ConcatNode constructor comment. |
| */ |
| public ConcatNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Validate node and calculate its type. |
| */ |
| @Override |
| public void validate(ParseTreeContext context) { |
| super.validate(context); |
| TypeHelper typeHelper = context.getTypeHelper(); |
| Iterator i = objects.iterator(); |
| while (i.hasNext()){ |
| Node node = (Node)i.next(); |
| node.validate(context); |
| node.validateParameter(context, typeHelper.getStringType()); |
| } |
| setType(typeHelper.getStringType()); |
| } |
| |
| /** |
| * INTERNAL |
| * Generate the EclipseLink expression for this node |
| */ |
| @Override |
| public Expression generateExpression(GenerationContext context) { |
| Expression whereClause = ((Node)objects.get(0)).generateExpression(context); |
| for (int i=1;i<objects.size();i++){ |
| whereClause = whereClause.concat(((Node)objects.get(i)).generateExpression(context)); |
| } |
| return whereClause; |
| } |
| |
| public void setObjects(List objects){ |
| this.objects = objects; |
| } |
| |
| } |