| /* |
| * 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.resolver; |
| |
| import java.util.List; |
| import org.eclipse.persistence.jpa.jpql.tools.TypeHelper; |
| import org.eclipse.persistence.jpa.jpql.tools.spi.IType; |
| import org.eclipse.persistence.jpa.jpql.tools.spi.ITypeDeclaration; |
| |
| /** |
| * This {@link Resolver} compares each {@link IType} retrieved from the list of {@link Resolver |
| * Resolvers} that were gathered for a given {@link org.eclipse.persistence.jpa.jpql.parser.Expression |
| * Expression} and returns that type if they are all the same type otherwise the {@link IType} for |
| * <code>Object</code> is returned. |
| * |
| * @version 2.5 |
| * @since 2.3 |
| * @author Pascal Filion |
| */ |
| public class CollectionEquivalentResolver extends Resolver { |
| |
| /** |
| * The list of {@link Resolver resolvers} that were created for each of the encapsulated |
| * expressions. |
| */ |
| private List<Resolver> resolvers; |
| |
| /** |
| * Creates a new <code>CollectionEquivalentResolver</code>. |
| * |
| * @param parent The parent {@link Resolver}, which is never <code>null</code> |
| * @param resolvers The list of {@link Resolver resolvers} that were created for each of |
| * the encapsulated expressions |
| */ |
| public CollectionEquivalentResolver(Resolver parent, List<Resolver> resolvers) { |
| super(parent); |
| this.resolvers = resolvers; |
| } |
| |
| @Override |
| protected IType buildType() { |
| |
| TypeHelper helper = getTypeHelper(); |
| IType unknownType = helper.unknownType(); |
| IType type = null; |
| |
| for (int index = 0, count = resolvers.size(); index < count; index++) { |
| IType anotherType = resolvers.get(index).getType(); |
| |
| if (anotherType == unknownType) { |
| continue; |
| } |
| |
| if (type == null) { |
| type = anotherType; |
| } |
| // Two types are not the same, then the type is Object |
| else if (!type.equals(anotherType)) { |
| return helper.objectType(); |
| } |
| } |
| |
| if (type == null) { |
| type = unknownType; |
| } |
| |
| return type; |
| } |
| |
| @Override |
| protected ITypeDeclaration buildTypeDeclaration() { |
| return getType().getTypeDeclaration(); |
| } |
| } |