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/*
* $Id: StringBufferPool.java,v 1.8 2010-11-01 04:34:52 joehw Exp $
*/
package com.sun.org.apache.xml.internal.utils;
/**
* This class pools string buffers, since they are reused so often.
* String buffers are good candidates for pooling, because of
* their supporting character arrays.
* @xsl.usage internal
*/
public class StringBufferPool
{
/** The global pool of string buffers. */
private static ObjectPool m_stringBufPool =
new ObjectPool(com.sun.org.apache.xml.internal.utils.FastStringBuffer.class);
/**
* Get the first free instance of a string buffer, or create one
* if there are no free instances.
*
* @return A string buffer ready for use.
*/
public synchronized static FastStringBuffer get()
{
return (FastStringBuffer) m_stringBufPool.getInstance();
}
/**
* Return a string buffer back to the pool.
*
* @param sb Must be a non-null reference to a string buffer.
*/
public synchronized static void free(FastStringBuffer sb)
{
// Since this isn't synchronized, setLength must be
// done before the instance is freed.
// Fix attributed to Peter Speck .
sb.setLength(0);
m_stringBufPool.freeInstance(sb);
}
}