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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   *
   * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
   *
   * The contents of this file are subject to the terms of either the GNU
   * General Public License Version 2 only ("GPL") or the Common Development
   * and Distribution License("CDDL") (collectively, the "License").  You
   * may not use this file except in compliance with the License.  You can
  * obtain a copy of the License at
  * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
  * or packager/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
  *
  * When distributing the software, include this License Header Notice in each
  * file and include the License file at packager/legal/LICENSE.txt.
  *
  * GPL Classpath Exception:
  * Oracle designates this particular file as subject to the "Classpath"
  * exception as provided by Oracle in the GPL Version 2 section of the License
  * file that accompanied this code.
  *
  * Modifications:
  * If applicable, add the following below the License Header, with the fields
  * enclosed by brackets [] replaced by your own identifying information:
  * "Portions Copyright [year] [name of copyright owner]"
  *
  * Contributor(s):
  * If you wish your version of this file to be governed by only the CDDL or
  * only the GPL Version 2, indicate your decision by adding "[Contributor]
  * elects to include this software in this distribution under the [CDDL or GPL
  * Version 2] license."  If you don't indicate a single choice of license, a
  * recipient has the option to distribute your version of this file under
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
  * its licensees as provided above.  However, if you add GPL Version 2 code
  * and therefore, elected the GPL Version 2 license, then the option applies
  * only if the new code is made subject to such option by the copyright
  * holder.
  */
 
 package com.sun.appserv.web.cache.filter;
 
an output stream wrapper to cache response bytes
 
 
 
     private boolean hasSetWriteListener = false;
 
     public CachingOutputStreamWrapper() {
         this. = new ByteArrayOutputStream(4096);
     }

    
Write the specified byte to our output stream.

Parameters:
b The byte to be written
Throws:
java.io.IOException if an input/output error occurs
 
     @Override
     public void write(int bthrows IOException {
         .write(b);
     }

    
Write b.length bytes from the specified byte array to our output stream.

Parameters:
b The byte array to be written
Throws:
java.io.IOException if an input/output error occurs
 
     @Override
     public void write(byte b[]) throws IOException {
         .write(b, 0, b.length);
     }

    
Write len bytes from the specified byte array, starting at the specified offset, to our output stream.

Parameters:
b The byte array containing the bytes to be written
off Zero-relative starting offset of the bytes to be written
len The number of bytes to be written
Throws:
java.io.IOException if an input/output error occurs
 
     @Override
     public void write(byte b[], int offint lenthrows IOException {
         .write(bofflen);
     }

    
` Flush any buffered data for this output stream, which also causes the response to be committed.
    @Override
    public void flush() throws IOException {
        // nothing to do with cached bytes
    }

    
Close this output stream, causing any buffered data to be flushed and any further output data to throw an IOException.
    @Override
    public void close() throws IOException {
        // nothing to do with cached bytes
    }

    
This method can be used to determine if data can be written without blocking.

Returns:
true if a write to this ServletOutputStream will succeed, otherwise returns false.
    @Override
    public boolean isReady() {
        return true;
    }
    @Override
    public void setWriteListener(WriteListener writeListener) {
        if (writeListener == null) {
            throw new NullPointerException();
        }
        if () {
            throw new IllegalStateException();
        }
         = true;
        writeListener.onWritePossible();
    }

    
return the cached bytes
    public byte[] getBytes() {
        return .toByteArray();
    }
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