StringBuffersPool.java

package ecologylab.generic;


import java.util.Vector;

/**
 * A pool of reusable {@link java.lang.StringBuilder StringBuilder}s.
 */
@Deprecated public class StringBuffersPool
extends Debug
{
	public static int DEFAULT_POOL_SIZE	=	64;
	public Vector<StringBuilder> bufferPool;
	
	int	bufferSize;
	int	poolSize;
	
	public StringBuffersPool(int bufferSize)
	{
		this(bufferSize, DEFAULT_POOL_SIZE);
	}
	public StringBuffersPool(int bufferSize, int poolSize)
	{
		this.bufferSize	= bufferSize;
		bufferPool		= new Vector<StringBuilder>(poolSize);
		for(int i = 0 ; i < poolSize; i++)
		{
			bufferPool.add(new StringBuilder(bufferSize));
		}	
	}
	
	public StringBuilder nextBuffer()
	{
		synchronized (bufferPool)
		{
			int freeIndex = bufferPool.size() - 1;
			if (freeIndex == -1)
			{
				weird("extending pool size ");
				return (new StringBuilder(bufferSize));
			}
			StringBuilder b = bufferPool.remove(freeIndex);
			return b;
		}
	}
	
	public void release(StringBuilder b)
	{
		b.setLength(0);
		bufferPool.add(b);		
	}
}