| /* |
| * 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.jpa.jpql.parser; |
| |
| import org.eclipse.persistence.jpa.jpql.ExpressionTools; |
| import org.eclipse.persistence.jpa.jpql.WordParser; |
| |
| /** |
| * This {@link UpdateItemStateFieldPathExpressionFactory} is meant to handle the parsing of a |
| * portion of the query when it's expected to be a state field path. By default a word without a dot |
| * would be parsed as an identification variable but for the left side of the update item assignment, |
| * a single word is a state field path expression. |
| * |
| * @see StateFieldPathExpression |
| * |
| * @version 2.5 |
| * @since 2.3 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public final class UpdateItemStateFieldPathExpressionFactory extends ExpressionFactory { |
| |
| /** |
| * The unique identifier of this {@link StateFieldPathExpressionFactory}. |
| */ |
| public static final String ID = "update-item-state-field-path"; |
| |
| /** |
| * Creates a new <code>UpdateItemStateFieldPathExpressionFactory</code>. |
| */ |
| public UpdateItemStateFieldPathExpressionFactory() { |
| super(ID); |
| } |
| |
| @Override |
| protected AbstractExpression buildExpression(AbstractExpression parent, |
| WordParser wordParser, |
| String word, |
| JPQLQueryBNF queryBNF, |
| AbstractExpression expression, |
| boolean tolerant) { |
| |
| ExpressionRegistry registry = getExpressionRegistry(); |
| |
| // When the tolerant mode is turned on, parse the invalid portion of the query |
| if (tolerant && registry.isIdentifier(word)) { |
| |
| ExpressionFactory factory = registry.expressionFactoryForIdentifier(word); |
| |
| // Special case where the word is seen as an JPQL identifier but it's actually |
| // an unqualified path expression. Examples: |
| // UPDATE DateTime SET avg = 'JPQL' |
| // UPDATE DateTime SET timestamp = 'JPQL' |
| if (factory == null || |
| registry.getIdentifierRole(word) == IdentifierRole.FUNCTION && |
| !ExpressionTools.isFunctionExpression(wordParser, word)) { |
| |
| expression = new StateFieldPathExpression(parent, word); |
| expression.parse(wordParser, tolerant); |
| return expression; |
| } |
| |
| factory = registry.getExpressionFactory(StateFieldPathExpressionFactory.ID); |
| return factory.buildExpression(parent, wordParser, word, queryBNF, expression, tolerant); |
| } |
| |
| // Create the state path expression |
| expression = new StateFieldPathExpression(parent, word); |
| expression.parse(wordParser, tolerant); |
| return expression; |
| } |
| } |