| /* |
| * Copyright (c) 1998, 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 from Oracle TopLink |
| package org.eclipse.persistence.internal.jpa.parsing; |
| |
| import org.eclipse.persistence.expressions.Expression; |
| import org.eclipse.persistence.queries.DatabaseQuery; |
| |
| /** |
| * INTERNAL: |
| * This node contains the information about what kind of query is represented it's tree |
| * (e.g. Select, Update etc.) |
| * Subclasses of this node will contain query specific behavior. |
| */ |
| public abstract class QueryNode extends MajorNode { |
| private ParseTree parseTree; |
| |
| protected QueryNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Returns a DatabaseQuery instance according to the kind of the query the |
| * owning ParseTree represents: SELECT, UPDATE or DELETE. |
| */ |
| public abstract DatabaseQuery createDatabaseQuery(ParseTreeContext context); |
| |
| /** |
| * INTERNAL |
| * Apply this node to the passed query |
| */ |
| public abstract void applyToQuery(DatabaseQuery theQuery, GenerationContext context); |
| |
| /** |
| * INTERNAL |
| * Return a EclipseLink expression generated using the left node |
| */ |
| @Override |
| public abstract Expression generateExpression(GenerationContext context); |
| |
| |
| /** |
| * Compute the Reference class for this query |
| * @return the class this query is querying for |
| */ |
| public Class getReferenceClass(GenerationContext genContext) { |
| return resolveClass(genContext); |
| } |
| |
| public boolean isSelectNode() { |
| return false; |
| } |
| |
| public boolean isUpdateNode() { |
| return false; |
| } |
| |
| public boolean isDeleteNode() { |
| return false; |
| } |
| |
| /** |
| * Return the class represented in this node. |
| */ |
| @Override |
| public abstract Class resolveClass(GenerationContext context); |
| |
| /** |
| * Set the parseTree |
| */ |
| public void setParseTree(ParseTree parseTree) { |
| this.parseTree = parseTree; |
| } |
| |
| /** */ |
| public ParseTree getParseTree() { |
| return parseTree; |
| } |
| |
| } |