// 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 com.cloud.bridge.io;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.activation.DataSource;

import org.apache.log4j.Logger;

/**
 * @author Kelven Yang
 */
public class FileRangeDataSource implements DataSource {
    protected final static Logger logger = Logger.getLogger(FileRangeDataSource.class);
    
	private FileRangeInputStream is;
	
	public FileRangeDataSource(File file, long startPos, long endPos) throws IOException {
		is = new FileRangeInputStream(file, startPos, endPos);
	}

	@Override
	public String getContentType() {
		assert(false);
		return null;
	}

	@Override
	public InputStream getInputStream() throws IOException {
		return is;
	}

	@Override
	public String getName() {
		assert(false);
		return null;
	}

	@Override
	public OutputStream getOutputStream() throws IOException {
		assert(false);
		return null;
	}
}