MemoryByteArrayOutputStream.java
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org.jfree.report.util |
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JFreeReport |
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These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
/**
* ========================================
* JFreeReport : a free Java report library
* ========================================
*
* Project Info: http://reporting.pentaho.org/
*
* (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: MemoryByteArrayOutputStream.java,v 1.1 2007/05/14 08:56:27 taqua Exp $
* ------------
* (C) Copyright 2000-2005, by Object Refinery Limited.
* (C) Copyright 2005-2007, by Pentaho Corporation.
*/
package org.jfree.report.util;
import java.io.IOException;
import java.io.OutputStream;
import org.jfree.util.Log;
/**
* A string writer that is able to write large amounts of data. The original StringWriter contained in Java doubles
* its buffersize everytime the buffer overflows. This is nice with small amounts of data, but awfull for huge
* buffers.
*
* @author Thomas Morgner
*/
public class MemoryByteArrayOutputStream extends OutputStream
{
private int initialBufferSize;
private int maximumBufferIncrement;
private int cursor;
private byte[] buffer;
private byte[] singleIntArray;
/**
* Create a new character-stream writer whose critical sections will synchronize on the writer itself.
*/
public MemoryByteArrayOutputStream()
{
this(4096, 65536);
}
/**
* Create a new character-stream writer whose critical sections will synchronize on the writer itself.
*/
public MemoryByteArrayOutputStream(final int bufferSize, final int maximumBufferIncrement)
{
this.initialBufferSize = bufferSize;
this.maximumBufferIncrement = maximumBufferIncrement;
this.buffer = new byte[bufferSize];
this.singleIntArray = new byte[1];
}
/**
* Write a portion of an array of characters.
*
* @param cbuf Array of characters
* @param off Offset from which to start writing characters
* @param len Number of characters to write
* @throws java.io.IOException If an I/O error occurs
*/
public synchronized void write(final byte cbuf[], final int off, final int len) throws IOException
{
if (len < 0)
{
throw new IllegalArgumentException();
}
if (off < 0)
{
throw new IndexOutOfBoundsException();
}
if (cbuf == null)
{
throw new NullPointerException();
}
if ((len + off) > cbuf.length)
{
throw new IndexOutOfBoundsException();
}
ensureSize (cursor + len);
System.arraycopy(cbuf, off, this.buffer, cursor, len);
cursor += len;
}
/**
* Writes <code>b.length</code> bytes from the specified byte array to this output stream. The general contract for
* <code>write(b)</code> is that it should have exactly the same effect as the call <code>write(b, 0,
* b.length)</code>.
*
* @param b the data.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.OutputStream#write(byte[], int, int)
*/
public void write(byte b[]) throws IOException
{
write(b, 0, b.length);
}
/**
* Writes the specified byte to this output stream. The general contract for <code>write</code> is that one byte is
* written to the output stream. The byte to be written is the eight low-order bits of the argument <code>b</code>.
* The 24 high-order bits of <code>b</code> are ignored.
* <p/>
* Subclasses of <code>OutputStream</code> must provide an implementation for this method.
*
* @param b the <code>byte</code>.
* @throws java.io.IOException if an I/O error occurs. In particular, an <code>IOException</code> may be thrown if the
* output stream has been closed.
*/
public synchronized void write(final int b) throws IOException
{
this.singleIntArray[0] = (byte) (0xFF & b);
write(singleIntArray, 0, 1);
}
private void ensureSize(final int size)
{
if (this.buffer.length >= size)
{
return;
}
final int computedSize = (int) Math.min ((this.buffer.length + 1) * 1.5, this.buffer.length + maximumBufferIncrement);
final int newSize = Math.max (size, computedSize);
final byte[] newBuffer = new byte[newSize];
System.arraycopy(this.buffer, 0, newBuffer, 0, cursor);
this.buffer = newBuffer;
}
/**
* Flush the stream. If the stream has saved any characters from the various write() methods in a buffer, write them
* immediately to their intended destination. Then, if that destination is another character or byte stream, flush
* it. Thus one flush() invocation will flush all the buffers in a chain of Writers and OutputStreams.
* <p/>
* If the intended destination of this stream is an abstraction provided by the underlying operating system, for
* example a file, then flushing the stream guarantees only that bytes previously written to the stream are passed to
* the operating system for writing; it does not guarantee that they are actually written to a physical device such as
* a disk drive.
*
* @throws java.io.IOException If an I/O error occurs
*/
public void flush() throws IOException
{
if ((buffer.length - cursor) > 50000)
Log.debug ("WASTED: " + (buffer.length - cursor));
}
/**
* Close the stream, flushing it first. Once a stream has been closed, further write() or flush() invocations will
* cause an IOException to be thrown. Closing a previously-closed stream, however, has no effect.
*
* @throws java.io.IOException If an I/O error occurs
*/
public void close() throws IOException
{
}
public synchronized byte[] toByteArray()
{
final byte[] retval = new byte[cursor];
System.arraycopy(buffer, 0, retval, 0, cursor);
return retval;
}
public int getLength()
{
return cursor;
}
public byte[] getRaw()
{
if ((buffer.length - cursor) > 50000)
Log.debug ("WASTED: " + (buffer.length - cursor) + " Length: " + buffer.length);
return buffer;
}
}
The table below shows all metrics for MemoryByteArrayOutputStream.java.




