org.parceler.internal.ExternalParcelTransactionWorker Maven / Gradle / Ivy

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/**
 * Copyright 2011-2015 John Ericksen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.parceler.internal;

import org.androidtransfuse.adapter.ASTAnnotation;
import org.androidtransfuse.adapter.ASTType;
import org.androidtransfuse.transaction.AbstractCompletionTransactionWorker;
import org.parceler.Parcel;
import org.parceler.ParcelClass;
import org.parceler.ParcelClasses;

import javax.inject.Inject;
import javax.inject.Provider;
import java.util.HashSet;
import java.util.Set;

/**
 * Executes the analysis and generation of an annotated @Parcel class.
 *
 * @author John Ericksen
 */
public class ExternalParcelTransactionWorker extends AbstractCompletionTransactionWorker, Void> {

    private final ParcelableAnalysis parcelableAnalysis;
    private final ParcelableGenerator parcelableGenerator;
    private final Set analyzed = new HashSet();

    @Inject
    public ExternalParcelTransactionWorker(ParcelableAnalysis parcelableAnalysis, ParcelableGenerator parcelableGenerator) {
        this.parcelableAnalysis = parcelableAnalysis;
        this.parcelableGenerator = parcelableGenerator;
    }

    @Override
    public Void innerRun(Provider valueProvider) {

        ASTType value = valueProvider.get();

        ASTAnnotation parcelClassesAnnotation = value.getASTAnnotation(ParcelClasses.class);
        if(parcelClassesAnnotation != null){
            ASTAnnotation[] parcelTypes = parcelClassesAnnotation.getProperty("value", ASTAnnotation[].class);

            for(ASTAnnotation annotation : parcelTypes){
                analyze(annotation);
            }
        }

        ASTAnnotation astAnnotation = value.getASTAnnotation(ParcelClass.class);
        if(astAnnotation != null){
            analyze(astAnnotation);
        }

        return null;
    }

    private void analyze(ASTAnnotation astAnnotation){
        ASTType parcelType = astAnnotation.getProperty("value", ASTType.class);
        if(!analyzed.contains(parcelType)) {
            analyzed.add(parcelType);
            ASTAnnotation parcelASTAnnotation = astAnnotation.getProperty("annotation", ASTAnnotation.class);
            if (parcelASTAnnotation == null) {
                parcelASTAnnotation = parcelType.getASTAnnotation(Parcel.class);
            }
            ParcelableDescriptor analysis = parcelableAnalysis.analyze(parcelType, parcelASTAnnotation);
            if (analysis != null) {
                parcelableGenerator.generateParcelable(parcelType, analysis);
            }
        }
    }
}