Package org.jclouds.azureblob.config

Source Code of org.jclouds.azureblob.config.AzureBlobModule$AzureBlobFactory

/**
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  jclouds 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.azureblob.config;

import javax.inject.Inject;
import javax.inject.Provider;

import org.jclouds.azureblob.domain.AzureBlob;
import org.jclouds.azureblob.domain.MutableBlobProperties;
import org.jclouds.azureblob.domain.internal.AzureBlobImpl;
import org.jclouds.blobstore.config.BlobStoreObjectModule;

import com.google.inject.AbstractModule;
import com.google.inject.Provides;
import com.google.inject.Scopes;

/**
* Configures the domain object mappings needed for all Azure Blob implementations
*
* @author Adrian Cole
*/
public class AzureBlobModule extends AbstractModule {

   /**
    * explicit factories are created here as it has been shown that Assisted Inject is extremely
    * inefficient. http://code.google.com/p/google-guice/issues/detail?id=435
    */
   @Override
   protected void configure() {
      // for converters
      install(new BlobStoreObjectModule());
      bind(AzureBlob.Factory.class).to(AzureBlobFactory.class).in(Scopes.SINGLETON);
   }

   private static class AzureBlobFactory implements AzureBlob.Factory {
      @Inject
      Provider<MutableBlobProperties> metadataProvider;

      public AzureBlob create(MutableBlobProperties metadata) {
         return new AzureBlobImpl(metadata != null ? metadata : metadataProvider.get());
      }
   }

   @Provides
   AzureBlob provideAzureBlob(AzureBlob.Factory factory) {
      return factory.create(null);
   }

}
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