| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * 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.apache.catalina.util; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.Reader; |
| import java.io.Writer; |
| |
| |
| /** |
| * Contains commonly needed I/O-related methods |
| * |
| * @author Dan Sandberg |
| */ |
| public class IOTools { |
| protected final static int DEFAULT_BUFFER_SIZE=4*1024; //4k |
| |
| //Ensure non-instantiability |
| private IOTools() { |
| } |
| |
| /** |
| * Read input from reader and write it to writer until there is no more |
| * input from reader. |
| * |
| * @param reader the reader to read from. |
| * @param writer the writer to write to. |
| * @param buf the char array to use as a bufferx |
| */ |
| public static void flow( Reader reader, Writer writer, char[] buf ) |
| throws IOException { |
| int numRead; |
| while ( (numRead = reader.read(buf) ) >= 0) { |
| writer.write(buf, 0, numRead); |
| } |
| } |
| |
| /** |
| * @see #flow( Reader, Writer, char[] ) |
| */ |
| public static void flow( Reader reader, Writer writer ) |
| throws IOException { |
| char[] buf = new char[DEFAULT_BUFFER_SIZE]; |
| flow( reader, writer, buf ); |
| } |
| |
| /** |
| * Read input from input stream and write it to output stream |
| * until there is no more input from input stream. |
| * |
| * @param is input stream the input stream to read from. |
| * @param os output stream the output stream to write to. |
| * @param buf the byte array to use as a buffer |
| */ |
| public static void flow( InputStream is, OutputStream os, byte[] buf ) |
| throws IOException { |
| int numRead; |
| while ( (numRead = is.read(buf) ) >= 0) { |
| os.write(buf, 0, numRead); |
| } |
| } |
| |
| /** |
| * @see #flow( java.io.InputStream, java.io.OutputStream, byte[] ) |
| */ |
| public static void flow( InputStream is, OutputStream os ) |
| throws IOException { |
| byte[] buf = new byte[DEFAULT_BUFFER_SIZE]; |
| flow( is, os, buf ); |
| } |
| } |