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/**
 * Copyright 2009 Google Inc.
 *
 * 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.openid4java.util;

import javax.net.ssl.SSLContext;

import org.apache.http.conn.ssl.X509HostnameVerifier;

import com.google.inject.Inject;
import com.google.inject.Provider;

public class HttpFetcherFactory {

  private final Provider _provider;

  @Inject
  public HttpFetcherFactory(Provider provider)
  {
      _provider = provider;
  }

  /**
   * Public constructor for non-Guice installations. Results in
   * {@link HttpCache} being used as the {@link HttpFetcher}
   */
  public HttpFetcherFactory()
  {
      this(new HttpCacheProvider());
  }

  public HttpFetcherFactory(SSLContext sslContext)
  {
	  this(new HttpCacheProvider(sslContext));
  }
  
  public HttpFetcherFactory(SSLContext sslContext, X509HostnameVerifier hostnameVerifier)
  {
	  this(new HttpCacheProvider(sslContext, hostnameVerifier));
  }
  
  public HttpFetcher createFetcher(HttpRequestOptions defaultOptions)
  {
      final HttpFetcher fetcher = _provider.get();
      fetcher.setDefaultRequestOptions(defaultOptions);
      return fetcher;
  }

  private static class HttpCacheProvider implements Provider {
	  
	  private final SSLContext sslContext;
	  
	  private final X509HostnameVerifier hostnameVerifier;
	  
	  public HttpCacheProvider(SSLContext sslContext, X509HostnameVerifier hostnameVerifier)
	  {
		  this.sslContext = sslContext;
		  this.hostnameVerifier = hostnameVerifier;
	  }
	  
	  public HttpCacheProvider(SSLContext sslContext)
	  {
		  this(sslContext, null);
	  }
	  
	  public HttpCacheProvider()
	  {
		  this(null, null);
	  }
	  
    public HttpFetcher get()
    {
    	return new HttpCache(this.sslContext, this.hostnameVerifier);
    }
  }
}