| /* |
| * Copyright (c) 2006, 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 |
| // |
| package org.eclipse.persistence.internal.jpa.jpql; |
| |
| import org.eclipse.persistence.expressions.Expression; |
| import org.eclipse.persistence.jpa.jpql.parser.CollectionExpression; |
| import org.eclipse.persistence.jpa.jpql.parser.UpdateClause; |
| import org.eclipse.persistence.jpa.jpql.parser.UpdateItem; |
| import org.eclipse.persistence.jpa.jpql.parser.UpdateStatement; |
| import org.eclipse.persistence.queries.UpdateAllQuery; |
| |
| /** |
| * This builder is responsible to populate a {@link UpdateAllQuery} representing an <b>UPDATE</b> query. |
| * |
| * @version 2.4 |
| * @since 2.3 |
| * @author Pascal Filion |
| * @author John Bracken |
| */ |
| final class UpdateQueryVisitor extends AbstractModifyAllQueryBuilder { |
| |
| /** |
| * Creates a new <code>UpdateQueryBuilder</code>. |
| * |
| * @param queryContext The context used to query information about the application metadata and |
| * cached information |
| * @param query The {@link UpdateAllQuery} to populate by using this visitor to visit the parsed |
| * tree representation of the JPQL query |
| */ |
| UpdateQueryVisitor(JPQLQueryContext queryContext, UpdateAllQuery query) { |
| super(queryContext, query); |
| } |
| |
| @Override |
| public void visit(CollectionExpression expression) { |
| expression.acceptChildren(this); |
| } |
| |
| @Override |
| public void visit(UpdateClause expression) { |
| expression.getRangeVariableDeclaration().accept(this); |
| expression.getUpdateItems().accept(this); |
| } |
| |
| @Override |
| public void visit(UpdateItem expression) { |
| |
| // Create the Expression for the state field path expression |
| Expression leftExpression = queryContext.buildExpression(expression.getStateFieldPathExpression()); |
| |
| // Create the Expression for the new value |
| Expression rightExpression = queryContext.buildExpression(expression.getNewValue()); |
| |
| // Add the expressions to the query |
| ((UpdateAllQuery) query).addUpdate(leftExpression, rightExpression); |
| } |
| |
| @Override |
| public void visit(UpdateStatement expression) { |
| |
| expression.getUpdateClause().accept(this); |
| |
| if (expression.hasWhereClause()) { |
| expression.getWhereClause().accept(this); |
| } |
| } |
| } |