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Ehcache is an open source, standards-based cache used to boost performance,
offload the database and simplify scalability. Ehcache is robust, proven and full-featured and
this has made it the most widely-used Java-based cache.
//
// ========================================================================
// Copyright (c) 1995-2012 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.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import org.eclipse.jetty.util.StringUtil;
/* ------------------------------------------------------------------------------- */
/**
*
*/
public class ByteArrayBuffer extends AbstractBuffer
{
final protected byte[] _bytes;
protected ByteArrayBuffer(int size, int access, boolean isVolatile)
{
this(new byte[size],0,0,access, isVolatile);
}
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, 0, READWRITE);
setPutIndex(0);
}
public ByteArrayBuffer(String value)
{
super(READWRITE,NON_VOLATILE);
_bytes = StringUtil.getBytes(value);
setGetIndex(0);
setPutIndex(_bytes.length);
_access=IMMUTABLE;
_string = value;
}
public ByteArrayBuffer(String value,boolean immutable)
{
super(READWRITE,NON_VOLATILE);
_bytes = StringUtil.getBytes(value);
setGetIndex(0);
setPutIndex(_bytes.length);
if (immutable)
{
_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;
}
@Override
public void compact()
{
if (isReadOnly())
throw new IllegalStateException(__READONLY);
int s = markIndex() >= 0 ? markIndex() : getIndex();
if (s > 0)
{
int length = putIndex() - s;
if (length > 0)
{
System.arraycopy(_bytes, s,_bytes, 0, length);
}
if (markIndex() > 0) setMarkIndex(markIndex() - s);
setGetIndex(getIndex() - s);
setPutIndex(putIndex() - s);
}
}
@Override
public boolean equals(Object obj)
{
if (obj==this)
return true;
if (obj == null || !(obj instanceof Buffer))
return false;
if (obj instanceof Buffer.CaseInsensitve)
return equalsIgnoreCase((Buffer)obj);
Buffer b = (Buffer) obj;
// reject different lengths
if (b.length() != length())
return false;
// reject AbstractBuffer with different hash value
if (_hash != 0 && obj instanceof AbstractBuffer)
{
AbstractBuffer ab = (AbstractBuffer) obj;
if (ab._hash != 0 && _hash != ab._hash)
return false;
}
// Nothing for it but to do the hard grind.
int get=getIndex();
int bi=b.putIndex();
for (int i = putIndex(); i-->get;)
{
byte b1 = _bytes[i];
byte b2 = b.peek(--bi);
if (b1 != b2) return false;
}
return true;
}
@Override
public boolean equalsIgnoreCase(Buffer b)
{
if (b==this)
return true;
// reject different lengths
if (b==null || b.length() != length())
return false;
// reject AbstractBuffer with different hash value
if (_hash != 0 && b instanceof AbstractBuffer)
{
AbstractBuffer ab = (AbstractBuffer) b;
if (ab._hash != 0 && _hash != ab._hash) return false;
}
// Nothing for it but to do the hard grind.
int get=getIndex();
int bi=b.putIndex();
byte[] barray=b.array();
if (barray==null)
{
for (int i = putIndex(); i-->get;)
{
byte b1 = _bytes[i];
byte b2 = b.peek(--bi);
if (b1 != b2)
{
if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A');
if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A');
if (b1 != b2) return false;
}
}
}
else
{
for (int i = putIndex(); i-->get;)
{
byte b1 = _bytes[i];
byte b2 = barray[--bi];
if (b1 != b2)
{
if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A');
if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A');
if (b1 != b2) return false;
}
}
}
return true;
}
@Override
public byte get()
{
return _bytes[_get++];
}
@Override
public int hashCode()
{
if (_hash == 0 || _hashGet!=_get || _hashPut!=_put)
{
int get=getIndex();
for (int i = putIndex(); i-- >get;)
{
byte b = _bytes[i];
if ('a' <= b && b <= 'z')
b = (byte) (b - 'a' + 'A');
_hash = 31 * _hash + b;
}
if (_hash == 0)
_hash = -1;
_hashGet=_get;
_hashPut=_put;
}
return _hash;
}
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;
}
if (l < 0)
return -1;
System.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;
}
@Override
public int poke(int index, Buffer src)
{
_hash=0;
/*
if (isReadOnly())
throw new IllegalStateException(__READONLY);
if (index < 0)
throw new IllegalArgumentException("index<0: " + index + "<0");
*/
int length=src.length();
if (index + length > capacity())
{
length=capacity()-index;
/*
if (length<0)
throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
*/
}
byte[] src_array = src.array();
if (src_array != null)
System.arraycopy(src_array, src.getIndex(), _bytes, index, length);
else
{
int s=src.getIndex();
for (int i=0;i capacity())
{
length=capacity()-index;
/* if (length<0)
throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
*/
}
System.arraycopy(b, offset, _bytes, index, length);
return length;
}
/* ------------------------------------------------------------ */
@Override
public void writeTo(OutputStream out)
throws IOException
{
out.write(_bytes,getIndex(),length());
if (!isImmutable())
clear();
}
/* ------------------------------------------------------------ */
@Override
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 (total0)
{
p += len;
total += len;
available -= len;
setPutIndex(p);
}
if (in.available()<=0)
break;
}
if (len<0 && total==0)
return -1;
return total;
}
/* ------------------------------------------------------------ */
@Override
public int space()
{
return _bytes.length - _put;
}
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
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);
}
@Override
public boolean equals(Object obj)
{
return obj instanceof Buffer && equalsIgnoreCase((Buffer)obj);
}
}
}