001/**
002 * Copyright 2013 John Ericksen
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *    http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.androidtransfuse.analysis.module;
017
018import org.androidtransfuse.TransfuseAnalysisException;
019import org.androidtransfuse.adapter.ASTType;
020import org.androidtransfuse.adapter.element.ASTTypeBuilderVisitor;
021import org.androidtransfuse.analysis.repository.InjectionNodeBuilderRepository;
022import org.androidtransfuse.analysis.repository.InjectionNodeBuilderRepositoryFactory;
023import org.androidtransfuse.annotations.ImplementedBy;
024import org.androidtransfuse.gen.variableBuilder.VariableInjectionBuilderFactory;
025import org.androidtransfuse.transaction.AbstractCompletionTransactionWorker;
026import org.androidtransfuse.validation.Validator;
027
028import javax.inject.Inject;
029import javax.inject.Provider;
030import javax.lang.model.type.TypeMirror;
031
032import static org.androidtransfuse.util.TypeMirrorUtil.getTypeMirror;
033
034/**
035 * Sets up the annotated @ImplementedBy interface to be bound to the contained class.
036 *
037 * @author John Ericksen
038 */
039public class ImplementedByTransactionWorker extends AbstractCompletionTransactionWorker<Provider<ASTType>, Void> {
040
041    private final InjectionNodeBuilderRepositoryFactory injectionNodeBuilders;
042    private final VariableInjectionBuilderFactory variableInjectionBuilderFactory;
043    private final ASTTypeBuilderVisitor astTypeBuilderVisitor;
044    private final Provider<InjectionNodeBuilderRepository> injectionNodeBuilderRepositoryProvider;
045    private final Validator validator;
046
047    @Inject
048    public ImplementedByTransactionWorker(InjectionNodeBuilderRepositoryFactory injectionNodeBuilders,
049                                          VariableInjectionBuilderFactory variableInjectionBuilderFactory,
050                                          ASTTypeBuilderVisitor astTypeBuilderVisitor,
051                                          Provider<InjectionNodeBuilderRepository> injectionNodeBuilderRepositoryProvider, Validator validator) {
052        this.injectionNodeBuilders = injectionNodeBuilders;
053        this.variableInjectionBuilderFactory = variableInjectionBuilderFactory;
054        this.astTypeBuilderVisitor = astTypeBuilderVisitor;
055        this.injectionNodeBuilderRepositoryProvider = injectionNodeBuilderRepositoryProvider;
056        this.validator = validator;
057    }
058
059    @Override
060    public Void innerRun(Provider<ASTType> astTypeProvider) {
061
062        ASTType astType = astTypeProvider.get();
063
064        ImplementedBy annotation = astType.getAnnotation(ImplementedBy.class);
065
066        InjectionNodeBuilderRepository repository = injectionNodeBuilderRepositoryProvider.get();
067        if (annotation != null) {
068            TypeMirror implementedClass = getTypeMirror(annotation, "value");
069
070            ASTType implAstType = implementedClass.accept(astTypeBuilderVisitor, null);
071
072            if (!implAstType.inheritsFrom(astType)) {
073                validator.error("@ImplementedBy must reference a subclass")
074                        .element(astType)
075                        .annotation(astType.getASTAnnotation(ImplementedBy.class))
076                        .parameter("value")
077                        .build();
078                throw new TransfuseAnalysisException("ImplementedBy configuration points to a class that doesn't inherit from the given base class");
079            }
080
081            repository.putType(astType, variableInjectionBuilderFactory.buildVariableInjectionNodeBuilder(implAstType));
082        }
083
084        injectionNodeBuilders.addModuleRepository(repository);
085
086        return null;
087    }
088}