providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/config/GoogleCloudStorageParserModule.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.jclouds.googlecloudstorage.config;

import java.lang.reflect.Type;
import java.util.Map;
import java.util.Set;

import javax.inject.Singleton;

import org.jclouds.googlecloud.config.ListPageAdapterFactory;
import org.jclouds.googlecloudstorage.domain.templates.BucketTemplate;
import org.jclouds.json.config.GsonModule;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.gson.TypeAdapterFactory;
import com.google.inject.AbstractModule;
import com.google.inject.Provides;

public class GoogleCloudStorageParserModule extends AbstractModule {

   @Override protected void configure() {
      bind(GsonModule.DateAdapter.class).to(GsonModule.Iso8601DateAdapter.class);
   }

   @Provides @Singleton public Map<Type, Object> typeAdapters() {
      return new ImmutableMap.Builder<Type, Object>()
               .put(BucketTemplate.class, new BucketTemplateTypeAdapter())
               .build();
   }

   // TODO: change jclouds core to use collaborative set bindings
   @Provides @Singleton Set<TypeAdapterFactory> typeAdapterFactories() {
      return ImmutableSet.<TypeAdapterFactory>of(new ListPageAdapterFactory());
   }

   private static class BucketTemplateTypeAdapter implements JsonSerializer<BucketTemplate> {

      @Override
      public JsonElement serialize(BucketTemplate src, Type typeOfSrc, JsonSerializationContext context) {
         BucketTemplateInternal template = new BucketTemplateInternal(src);
         JsonObject bucketTemplate = (JsonObject) context.serialize(template, BucketTemplateInternal.class);

         // deal with bucketAccessControls
         if (!(src.acl() == null) && (src.acl().isEmpty())) {
            bucketTemplate.add("acl", null);
         }
         // deal with DefaultObjectAccessControls
         if (!(src.defaultObjectAccessControls() == null) && (src.defaultObjectAccessControls().isEmpty())) {
            bucketTemplate.add("defaultObjectAccessControls", null);
         }

         // deal with Cors
         if (!(src.cors() == null) && (src.cors().isEmpty())) {
            bucketTemplate.add("cors", null);
         }

         return bucketTemplate;
      }

      private static class BucketTemplateInternal extends BucketTemplate {
         private BucketTemplateInternal(BucketTemplate template) {
            name(template.name()).projectNumber(template.projectNumber()).acl(template.acl())
                  .defaultObjectAccessControls(template.defaultObjectAccessControls()).owner(template.owner())
                  .location(template.location()).website(template.website()).logging(template.logging())
                  .versioning(template.versioning()).cors(template.cors()).lifeCycle(template.lifeCycle())
                  .storageClass(template.storageClass());
         }
      }
   }
}