| /* |
| * 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.tools; |
| |
| import org.eclipse.persistence.jpa.jpql.parser.JPQLGrammar; |
| import org.eclipse.persistence.jpa.jpql.tools.model.IJPQLQueryBuilder; |
| import org.eclipse.persistence.jpa.jpql.tools.model.JPQLQueryBuilder1_0; |
| import org.eclipse.persistence.jpa.jpql.tools.model.JPQLQueryBuilder2_0; |
| import org.eclipse.persistence.jpa.jpql.tools.model.JPQLQueryBuilder2_1; |
| import org.eclipse.persistence.jpa.jpql.tools.spi.IQuery; |
| |
| /** |
| * This helper can perform the following operations over a JPQL query: |
| * <ul> |
| * <li>Calculates the result type of a query: {@link #getResultType()};</li> |
| * <li>Calculates the type of an input parameter: {@link #getParameterType(String)}.</li> |
| * <li>Calculates the possible choices to complete the query from a given |
| * position (used for content assist): {@link #buildContentAssistProposals(int)}.</li> |
| * <li>Validates the query by introspecting it grammatically and semantically: |
| * <ul> |
| * <li>{@link #validate()},</li> |
| * <li>{@link #validateGrammar()},</li> |
| * <li>{@link #validateSemantic()}.</li> |
| * </ul> |
| * </li> |
| * <li>Refactoring support: |
| * <ul> |
| * <li>{@link #buildBasicRefactoringTool()} provides support for generating the delta of the |
| * refactoring operation through a collection of {@link TextEdit} objects.</li> |
| * <li>{@link #buildRefactoringTool()} provides support for refactoring the JPQL query through |
| * the editable {@link org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject StateObject} and |
| * once all refactoring operations have been executed, the {@link |
| * org.eclipse.persistence.jpa.jpql.tools.model.IJPQLQueryFormatter IJPQLQueryFormatter} will |
| * generate a new string representation of the JPQL query.</li> |
| * </ul> |
| * </li> |
| * </ul> |
| * |
| * This helper should be used when the JPQL query is written using the JPQL grammar defined in the |
| * Java Persistence functional specification 1.0 or 2.x. |
| * <p> |
| * Provisional API: This interface is part of an interim API that is still under development and |
| * expected to change significantly before reaching stability. It is available at this early stage |
| * to solicit feedback from pioneering adopters on the understanding that any code that uses this |
| * API will almost certainly be broken (repeatedly) as the API evolves.<p> |
| * |
| * @version 2.5 |
| * @since 2.3 |
| * @author Pascal Filion |
| */ |
| public class DefaultJPQLQueryHelper extends AbstractJPQLQueryHelper { |
| |
| /** |
| * Creates a new <code>DefaultJPQLQueryHelper</code>. |
| * |
| * @param jpqlGrammar The {@link JPQLGrammar} that will determine how to parse JPQL queries |
| */ |
| public DefaultJPQLQueryHelper(JPQLGrammar jpqlGrammar) { |
| super(jpqlGrammar); |
| } |
| |
| /** |
| * Creates a new <code>JPQLQueryHelper</code>. |
| * |
| * @param queryContext The context used to query information about the JPQL query |
| */ |
| public DefaultJPQLQueryHelper(JPQLQueryContext queryContext) { |
| super(queryContext); |
| } |
| |
| @Override |
| public BasicRefactoringTool buildBasicRefactoringTool() { |
| return new DefaultBasicRefactoringTool( |
| getQuery().getExpression(), |
| getGrammar(), |
| getProvider() |
| ); |
| } |
| |
| @Override |
| protected AbstractContentAssistVisitor buildContentAssistVisitor(JPQLQueryContext queryContext) { |
| return new DefaultContentAssistVisitor(queryContext); |
| } |
| |
| @Override |
| protected DefaultGrammarValidator buildGrammarValidator(JPQLGrammar jpqlGrammar) { |
| return new DefaultGrammarValidator(jpqlGrammar); |
| } |
| |
| @Override |
| protected JPQLQueryContext buildJPQLQueryContext(JPQLGrammar jpqlGrammar) { |
| return new DefaultJPQLQueryContext(jpqlGrammar); |
| } |
| |
| /** |
| * Creates the right {@link IJPQLQueryBuilder} based on the JPQL grammar. |
| * |
| * @return A new concrete instance of {@link IJPQLQueryBuilder} |
| */ |
| protected IJPQLQueryBuilder buildQueryBuilder() { |
| switch (getGrammar().getJPAVersion()) { |
| case VERSION_1_0: return new JPQLQueryBuilder1_0(); |
| case VERSION_2_0: return new JPQLQueryBuilder2_0(); |
| default: return new JPQLQueryBuilder2_1(); |
| } |
| } |
| |
| @Override |
| public RefactoringTool buildRefactoringTool() { |
| |
| IQuery query = getQuery(); |
| |
| return new DefaultRefactoringTool( |
| query.getProvider(), |
| buildQueryBuilder(), |
| query.getExpression() |
| ); |
| } |
| |
| @Override |
| protected DefaultSemanticValidator buildSemanticValidator(JPQLQueryContext queryContext) { |
| return new DefaultSemanticValidator(queryContext); |
| } |
| } |