/**

 * Copyright (c) 2015, biezhi 王爵 (biezhi.me@gmail.com)

 *

 * 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 com.blade.servlet.multipart;



import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.util.Arrays;



import blade.kit.io.FastByteArrayOutputStream;



/**

 * 文件上传Item

 *

 * @author	<a href="mailto:biezhi.me@gmail.com" target="_blank">biezhi</a>

 * @since	1.0

 */

public class FileItem {



	private String name;



	private boolean isFile;

	private String fileName;

	private String contentType;

	private InputStream inputStream;

	

    public static final String FORM_DATA = "form-data";



    public static final String MULTIPART_FORM_DATA = "multipart/form-data";



    // 数据体缓存

	private FastByteArrayOutputStream outputStream;

	

	public void write(byte[] buf, int off, int len) {

		if (outputStream == null) {

			outputStream = new FastByteArrayOutputStream();

		}

		outputStream.write(buf, off, len);

	}



	// -----------------------------------------------------------------

	public String getName() {

		return name;

	}



	public void setName(String name) {

		this.name = name;

	}



	public String getFileName() {

		return fileName;

	}



	public void setFileName(String fileName) {

		this.fileName = fileName;

	}



	public String getContentType() {

		return contentType;

	}



	public void setContentType(String contentType) {

		this.contentType = contentType;

	}



	public boolean isFile() {

		return isFile;

	}



	public void setFile(boolean isFile) {

		this.isFile = isFile;

	}



	public byte[] getFileContent() {

		byte[] buf = outputStream.toByteArray();

		int dirtyCount = 2;



		// 最后会多出一个\r\n,

		// 根据ServletInputStream, \n 就算一行结束, 因此对于\r需要特殊判断

		if ('\r' != buf[buf.length - 2])

			dirtyCount = 1;



		return Arrays.copyOfRange(buf, 0, buf.length - dirtyCount);

	}



	public String getString(String encoding){

		try {

			return outputStream == null ? null : new String(getFileContent(), encoding);

		} catch (UnsupportedEncodingException e) {

			e.printStackTrace();

		}

		return null;

	}

	

	public String getString() {

		return outputStream == null ? null : new String(getFileContent());

	}



	public InputStream getInputStream() {

		return inputStream;

	}



	public void setInputStream(InputStream inputStream) {

		this.inputStream = inputStream;

	}

	

}