| /* |
| * 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.queries.ObjectLevelReadQuery; |
| import org.eclipse.persistence.queries.ReportQuery; |
| |
| import org.eclipse.persistence.expressions.*; |
| import org.eclipse.persistence.internal.expressions.*; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Superclass for literals (String, Integer, Float, Character, ...) |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Maintain the literal being represented |
| * <li> Print to a string |
| * <li> Answer if the node is completely built |
| * </ul> |
| * @author Jon Driscoll and Joel Lucuik |
| * @since TopLink 4.0 |
| */ |
| public class LiteralNode extends Node implements AliasableNode { |
| public java.lang.Object literal; |
| |
| /** |
| * Return a new LiteralNode. |
| */ |
| public LiteralNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Apply this node to the passed query |
| */ |
| @Override |
| public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) { |
| if (theQuery.isReportQuery()) { |
| ReportQuery reportQuery = (ReportQuery)theQuery; |
| reportQuery.addAttribute("CONSTANT", generateExpression(context)); |
| } |
| |
| } |
| |
| /** |
| * INTERNAL |
| * Generate the a new EclipseLink ConstantExpression for this node. |
| */ |
| @Override |
| public Expression generateExpression(GenerationContext context) { |
| Expression whereClause = new ConstantExpression(getLiteral(), context.getBaseExpression()); |
| return whereClause; |
| } |
| |
| /** |
| * INTERNAL |
| * Return the literal |
| */ |
| @Override |
| public String getAsString() { |
| return getLiteral().toString(); |
| } |
| |
| /** |
| * Insert the method's description here. |
| * Creation date: (12/21/00 10:51:48 AM) |
| * @return java.lang.Object |
| */ |
| public java.lang.Object getLiteral() { |
| return literal; |
| } |
| |
| /** |
| * INTERNAL |
| * Is this a literal node |
| */ |
| @Override |
| public boolean isLiteralNode() { |
| return true; |
| } |
| |
| /** |
| * Insert the method's description here. |
| * Creation date: (12/21/00 10:51:48 AM) |
| * @param newLiteral java.lang.Object |
| */ |
| public void setLiteral(java.lang.Object newLiteral) { |
| literal = newLiteral; |
| } |
| |
| @Override |
| public String toString(int indent) { |
| StringBuilder buffer = new StringBuilder(); |
| toStringIndent(indent, buffer); |
| buffer.append(toStringDisplayName() + "[" + getLiteral() + "]"); |
| return buffer.toString(); |
| } |
| |
| @Override |
| public boolean isAliasableNode(){ |
| return true; |
| } |
| } |