Jetty example source code file (ByteArrayBuffer.java)

This example Jetty source code file (ByteArrayBuffer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Jetty tags/keywords

abstractbuffer, bytearraybuffer, bytearraybuffer, caseinsensitive, caseinsensitive, illegalargumentexception, illegalstateexception, illegalstateexception, io, ioexception, non_volatile, readwrite, readwrite, unsupportedencodingexception

The Jetty ByteArrayBuffer.java source code

// ========================================================================
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.mortbay.io;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

/* ------------------------------------------------------------------------------- */
/**
 * @author gregw
 */
public class ByteArrayBuffer extends AbstractBuffer
{
    private byte[] _bytes;

    public ByteArrayBuffer(byte[] bytes)
    {
        this(bytes, 0, bytes.length, READWRITE);
    }

    public ByteArrayBuffer(byte[] bytes, int index, int length)
    {
        this(bytes, index, length, READWRITE);
    }

    public ByteArrayBuffer(byte[] bytes, int index, int length, int access)
    {
        super(READWRITE, NON_VOLATILE);
        _bytes = bytes;
        setPutIndex(index + length);
        setGetIndex(index);
        _access = access;
    }

    public ByteArrayBuffer(byte[] bytes, int index, int length, int access, boolean isVolatile)
    {
        super(READWRITE, isVolatile);
        _bytes = bytes;
        setPutIndex(index + length);
        setGetIndex(index);
        _access = access;
    }

    public ByteArrayBuffer(int size)
    {
        this(new byte[size], 0, size, READWRITE);
        setPutIndex(0);
    }

    public ByteArrayBuffer(String value)
    {
        super(READWRITE,NON_VOLATILE);
        _bytes = Portable.getBytes(value);
        setGetIndex(0);
        setPutIndex(_bytes.length);
        _access=IMMUTABLE;
        _string = value;
    }

    public ByteArrayBuffer(String value,String encoding) throws UnsupportedEncodingException
    {
        super(READWRITE,NON_VOLATILE);
        _bytes = value.getBytes(encoding);
        setGetIndex(0);
        setPutIndex(_bytes.length);
        _access=IMMUTABLE;
        _string = value;
    }

    public byte[] array()
    {
        return _bytes;
    }

    public int capacity()
    {
        return _bytes.length;
    }

    public byte get()
    {
        return _bytes[_get++];
    }
    
    public byte peek(int index)
    {
        return _bytes[index];
    }

    public int peek(int index, byte[] b, int offset, int length)
    {
        int l = length;
        if (index + l > capacity()) l = capacity() - index;
        if (l <= 0) return -1;
        Portable.arraycopy(_bytes, index, b, offset, l);
        return l;
    }

    public void poke(int index, byte b)
    {
        if (isReadOnly()) throw new IllegalStateException(__READONLY);
        if (index < 0) throw new IllegalArgumentException("index<0: " + index + "<0");
        if (index > capacity())
                throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
        _bytes[index] = b;
    }
    
    public static class CaseInsensitive extends ByteArrayBuffer implements Buffer.CaseInsensitve
    {
        public CaseInsensitive(String s)
        {
            super(s);
        }

        public CaseInsensitive(byte[] b, int o, int l, int rw)
        {
            super(b,o,l,rw);
        }
    }


    /* ------------------------------------------------------------ */
    /** Wrap a byte array.
     * @param b
     * @param off
     * @param len
     */
    public void wrap(byte[] b, int off, int len)
    {
        if (isReadOnly()) throw new IllegalStateException(__READONLY);
        if (isImmutable()) throw new IllegalStateException(__IMMUTABLE);
        _bytes=b;
        clear();
        setGetIndex(off);
        setPutIndex(off+len);
    }

    /* ------------------------------------------------------------ */
    /** Wrap a byte array
     * @param b
     */
    public void wrap(byte[] b)
    {
        if (isReadOnly()) throw new IllegalStateException(__READONLY);
        if (isImmutable()) throw new IllegalStateException(__IMMUTABLE);
        _bytes=b;
        setGetIndex(0);
        setPutIndex(b.length);
    }

    /* ------------------------------------------------------------ */
    public void writeTo(OutputStream out)
        throws IOException
    {
        out.write(_bytes,getIndex(),length());
        clear();
    }
    
    /* ------------------------------------------------------------ */
    public int readFrom(InputStream in,int max) throws IOException
    {
        if (max<0||max>space())
            max=space();
        int p = putIndex();
        
        int len=0, total=0, available=max;
        while (total<max) 
        {
            len=in.read(_bytes,p,available);
            if (len<0)
                break;
            else if (len>0)
            {
                p += len;
                total += len;
                available -= len;
                setPutIndex(p);
            }
            if (in.available()<=0)
                break;
        }
        if (len<0 && total==0)
            return -1;
        return total;
    }
}