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  /*
   *  Licensed to the Apache Software Foundation (ASF) under one or more
   *  contributor license agreements.  See the NOTICE file distributed with
   *  this work for additional information regarding copyright ownership.
   *  The ASF licenses this file to You 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.coyote.http11.filters;
 
 
 
Identity output filter.

Author(s):
Remy Maucherat
 
 public class IdentityOutputFilter implements OutputFilter {
 
 
     // -------------------------------------------------------------- Constants
 
 
     protected static final String ENCODING_NAME = "identity";
     protected static final ByteChunk ENCODING = new ByteChunk();
 
 
     // ----------------------------------------------------- Static Initializer
 
 
     static {
     }
 
 
     // ----------------------------------------------------- Instance Variables
 

    
Content length.
 
     protected long contentLength = -1;


    
Remaining bytes.
 
     protected long remaining = 0;


    
Next buffer in the pipeline.
 
     protected OutputBuffer buffer;
 
 
     // ------------------------------------------------------------- Properties
 

    
Get content length.
 
     public long getContentLength() {
         return ;
     }


    
Get remaining bytes.
 
     public long getRemaining() {
         return ;
     }
 
 
     // --------------------------------------------------- OutputBuffer Methods
 

    
Write some bytes.

Returns:
number of bytes written by the filter
 
     public int doWrite(ByteChunk chunkResponse res)
        throws IOException {
        int result = -1;
        if ( >= 0) {
            if ( > 0) {
                result = chunk.getLength();
                if (result > ) {
                    // The chunk is longer than the number of bytes remaining
                    // in the body; changing the chunk length to the number
                    // of bytes remaining
                    chunk.setBytes(chunk.getBytes(), chunk.getStart(), 
                                   (int);
                    result = (int;
                     = 0;
                } else {
                     =  - result;
                }
                .doWrite(chunkres);
            } else {
                // No more bytes left to be written : return -1 and clear the 
                // buffer
                chunk.recycle();
                result = -1;
            }
        } else {
            // If no content length was set, just write the bytes
            .doWrite(chunkres);
            result = chunk.getLength();
        }
        return result;
    }
    // --------------------------------------------------- OutputFilter Methods


    
Some filters need additional parameters from the response. All the necessary reading can occur in that method, as this method is called after the response header processing is complete.
    public void setResponse(Response response) {
         = response.getContentLengthLong();
         = ;
    }


    
Set the next buffer in the filter pipeline.
    public void setBuffer(OutputBuffer buffer) {
        this. = buffer;
    }


    
End the current request. It is acceptable to write extra bytes using buffer.doWrite during the execution of this method.
    public long end()
        throws IOException {
        if ( > 0)
            return ;
        return 0;
    }


    
Make the filter ready to process the next request.
    public void recycle() {
         = -1;
         = 0;
    }


    
Return the name of the associated encoding; Here, the value is "identity".
    public ByteChunk getEncodingName() {
        return ;
    }
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