/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * 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 org.argeo.util;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.Reader;
  import java.io.Writer;
  
  /** Utilities to be used when APache COmmons IO is not available. */
  class StreamUtils {
  	private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
  
  	/*
  	 * APACHE COMMONS IO (inspired)
  	 */
  
  	/** @return the number of bytes */
  	public static Long copy(InputStream in, OutputStream out)
  			throws IOException {
  		Long count = 0l;
  		byte[] buf = new byte[DEFAULT_BUFFER_SIZE];
  		while (true) {
  			int length = in.read(buf);
  			if (length < 0)
  				break;
  			out.write(buf, 0, length);
  			count = count + length;
  		}
  		return count;
  	}
  
  	/** @return the number of chars */
  	public static Long copy(Reader in, Writer out) throws IOException {
  		Long count = 0l;
  		char[] buf = new char[DEFAULT_BUFFER_SIZE];
  		while (true) {
  			int length = in.read(buf);
  			if (length < 0)
  				break;
  			out.write(buf, 0, length);
  			count = count + length;
  		}
  		return count;
  	}
  
  	public static void closeQuietly(InputStream in) {
  		if (in != null)
  			try {
  				in.close();
  			} catch (Exception e) {
  				//
  			}
  	}
  
  	public static void closeQuietly(OutputStream out) {
  		if (out != null)
  			try {
  				out.close();
  			} catch (Exception e) {
  				//
  			}
  	}
  
  	public static void closeQuietly(Reader in) {
  		if (in != null)
  			try {
  				in.close();
  			} catch (Exception e) {
  				//
  			}
  	}
  
  	public static void closeQuietly(Writer out) {
  		if (out != null)
  			try {
  				out.close();
  			} catch (Exception e) {
  				//
  			}
  	}
  }