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/*
* Copyright (c) 2006, 2018 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 UPDATE query.
*
* @version 2.4
* @since 2.3
* @author Pascal Filion
* @author John Bracken
*/
final class UpdateQueryVisitor extends AbstractModifyAllQueryBuilder {
/**
* Creates a new UpdateQueryBuilder
.
*
* @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);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionExpression expression) {
expression.acceptChildren(this);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UpdateClause expression) {
expression.getRangeVariableDeclaration().accept(this);
expression.getUpdateItems().accept(this);
}
/**
* {@inheritDoc}
*/
@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);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UpdateStatement expression) {
expression.getUpdateClause().accept(this);
if (expression.hasWhereClause()) {
expression.getWhereClause().accept(this);
}
}
}