| /* |
| * 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.cocoon.caching; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * This is an {@link OutputStream} which forwards all received bytes to another |
| * output stream and in addition caches all bytes, thus acting like a |
| * TeeOutputStream. |
| * |
| * @version $Id$ |
| */ |
| public final class CachingOutputStream |
| extends OutputStream { |
| |
| private OutputStream receiver; |
| |
| /** The buffer for the compile xml byte stream. */ |
| private byte buf[]; |
| |
| /** The number of valid bytes in the buffer. */ |
| private int bufCount; |
| |
| public CachingOutputStream(OutputStream os) { |
| this.receiver = os; |
| this.buf = new byte[1024]; |
| this.bufCount = 0; |
| } |
| |
| public byte[] getContent() { |
| byte newbuf[] = new byte[this.bufCount]; |
| System.arraycopy(this.buf, 0, newbuf, 0, this.bufCount); |
| return newbuf; |
| } |
| |
| public void write(int b) throws IOException { |
| this.receiver.write(b); |
| int newcount = this.bufCount + 1; |
| if (newcount > this.buf.length) { |
| byte newbuf[] = new byte[Math.max(this.buf.length << 1, newcount)]; |
| System.arraycopy(this.buf, 0, newbuf, 0, this.bufCount); |
| this.buf = newbuf; |
| } |
| this.buf[this.bufCount] = (byte)b; |
| this.bufCount = newcount; |
| } |
| |
| public void write( byte b[] ) throws IOException { |
| this.write(b, 0, b.length); |
| } |
| |
| public void write(byte b[], int off, int len) throws IOException { |
| this.receiver.write(b, off, len); |
| if (len == 0) return; |
| int newcount = this.bufCount + (len-off); |
| if (newcount > this.buf.length) { |
| byte newbuf[] = new byte[Math.max(this.buf.length << 1, newcount)]; |
| System.arraycopy(this.buf, 0, newbuf, 0, this.bufCount); |
| this.buf = newbuf; |
| } |
| System.arraycopy(b, off, this.buf, this.bufCount, len); |
| this.bufCount = newcount; |
| } |
| |
| public void flush() throws IOException { |
| this.receiver.flush(); |
| } |
| |
| public void close() throws IOException { |
| this.receiver.close(); |
| } |
| |
| |
| } |