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// ========================================================================
// Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at 
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses. 
// ========================================================================

package org.eclipse.jetty.http;

import java.io.IOException;
import java.io.InputStream;

import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.eclipse.jetty.util.resource.Resource;

/* ------------------------------------------------------------ */
/** HttpContent.
 * 
 *
 */
public interface HttpContent
{
    Buffer getContentType();
    Buffer getLastModified();
    Buffer getIndirectBuffer();
    Buffer getDirectBuffer();
    Resource getResource();
    long getContentLength();
    InputStream getInputStream() throws IOException;
    void release();
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    public class ResourceAsHttpContent implements HttpContent
    {
        final Resource _resource;
        final Buffer _mimeType;
        final int _maxBuffer;

        public ResourceAsHttpContent(final Resource resource, final Buffer mimeType)
        {
            _resource=resource;
            _mimeType=mimeType;
            _maxBuffer=-1;
        }
        
        public ResourceAsHttpContent(final Resource resource, final Buffer mimeType, int maxBuffer)
        {
            _resource=resource;
            _mimeType=mimeType;
            _maxBuffer=maxBuffer;
        }

        /* ------------------------------------------------------------ */
        public Buffer getContentType()
        {
            return _mimeType;
        }

        /* ------------------------------------------------------------ */
        public Buffer getLastModified()
        {
            return null;
        }

        /* ------------------------------------------------------------ */
        public Buffer getDirectBuffer()
        {
            return null;
        }

        /* ------------------------------------------------------------ */
        public Buffer getIndirectBuffer()
        {
            try
            {
                if (_resource.length()<=0 || _maxBuffer<_resource.length())
                    return null;
                ByteArrayBuffer buffer = new ByteArrayBuffer((int)_resource.length());
                buffer.readFrom(_resource.getInputStream(),(int)_resource.length());
                return buffer;
            }
            catch(IOException e)
            {
                throw new RuntimeException(e);
            }
        }

        /* ------------------------------------------------------------ */
        public long getContentLength()
        {
            return _resource.length();
        }

        /* ------------------------------------------------------------ */
        public InputStream getInputStream() throws IOException
        {
            return _resource.getInputStream();
        }

        /* ------------------------------------------------------------ */
        public Resource getResource()
        {
            return _resource;
        }

        /* ------------------------------------------------------------ */
        public void release()
        {
            _resource.release();
        }
    }
}