/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
 * All rights reserved.
 *
 * 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 br.com.caelum.vraptor.interceptor.download;

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

import javax.servlet.http.HttpServletResponse;

/**
 * Reads bytes from a file into the result.
 *
 * @author filipesabella
 * @author Paulo Silveira
 * 
 * @see InputStreamDownload
 * @see ByteArrayDownload
 */
public class FileDownload implements Download {
	private final InputStreamDownload inputDownload;

	public FileDownload(File file, String contentType, String fileName) {
		this(file, contentType, fileName, false);
	}

	public FileDownload(File file, String contentType) {
		this(file, contentType, file.getName(), false);
	}

	public FileDownload(File file, String contentType, String fileName, boolean doDownload) {
		try {
			this.inputDownload = new InputStreamDownload(new FileInputStream(file), contentType, fileName, doDownload,
					file.length());
		} catch (FileNotFoundException e) {
			throw new IllegalArgumentException(e);
		}
	}
	
	public void write(HttpServletResponse response) throws IOException {
		inputDownload.write(response);
	}
}