ioutils.java

一个java写的business process management系统

/*
 * Copyright (c) 2003-2004, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.base;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

import net.orthanc.flow4j.runtime.Flow4JRuntimeException;

/**
 * @author greifa
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class IOUtils {


	/**
	 * TODO
	 *
	 * @param	in	TODO
	 * @param	out	TODO
	 * @exception	IOException	TODO
	 */
	public static void copyBufferedStream(InputStream in, OutputStream out) throws IOException {
		synchronized (in) {
			synchronized (out) {
				BufferedInputStream bin = new BufferedInputStream(in);
				BufferedOutputStream bout = new BufferedOutputStream(out);

				while (true) {
					int data = bin.read();
					if (data == -1)
						break;

					bout.write(data);
				}
				bout.flush();
			}
		}
	}

	/**
	 * TODO
	 *
	 * @param	in	TODO
	 * @param	out	TODO
	 * @exception	IOException	TODO
	 */
	public static void copyChars(Reader in, Writer out) throws IOException {
		synchronized (in) {
			synchronized (out) {
				BufferedReader bin = new BufferedReader(in);
				BufferedWriter bout = new BufferedWriter(out);

				String line;
				while ((line = bin.readLine()) != null) {
					bout.write(line);
					bout.newLine();
				}
				bout.flush();
			}
		}
	}




	public static String getResourceAsString(ClassLoader loader, String path) throws Flow4JRuntimeException {
		java.io.InputStream in = null;
		java.io.Reader reader = null;
		java.io.StringWriter writer = null;
		try {
			in = loader.getResourceAsStream(path);
			reader = new java.io.InputStreamReader(in);
			writer = new java.io.StringWriter();
			net.orthanc.flow4j.base.IOUtils.copyChars(reader, writer);
			reader.close();
			writer.close();
		} catch (java.io.IOException e) {
			throw new Flow4JRuntimeException("Error while loading resource (" + path + ")", e);
		} finally {
			if (in != null)
				try {
					reader.close();
				} catch (java.io.IOException e) {
				}
			if (reader != null)
				try {
					reader.close();
				} catch (java.io.IOException e) {
				}
			if (writer != null)
				try {
					reader.close();
				} catch (java.io.IOException e) {
				}
		}

		return writer.toString();
	}

}