/**
 * 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.io.payloads;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

import com.google.common.base.Throwables;

/**
 * @author Adrian Cole
 */
public class FilePayload extends BasePayload<File> {

   public FilePayload(File content) {
      super(content);
      getContentMetadata().setContentLength(content.length());
      checkArgument(checkNotNull(content, "content").exists(), "file must exist: " + content);
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public InputStream getInput() {
      try {
         return new FileInputStream(content);
      } catch (FileNotFoundException e) {
         Throwables.propagate(e);
         return null;
      }
   }

}