jheight 2005/09/01 20:27:43
Added: src/java/org/apache/poi/util BitFieldFactory.java
Log:
Added a factory implementation for BitFields. Will save a bit of memory.
Patch to change all fields to use the factory comming soon.
Revision Changes Path
1.1
jakarta-poi/src/java/org/apache/poi/util/BitFieldFactory.java
Index: BitFieldFactory.java
===================================================================
/* ====================================================================
Copyright 2002-2004 Apache Software Foundation
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.apache.poi.util;
import java.util.*;
/**
* Returns immutable Btfield instances.
*
* @author Jason Height (jheight at apache dot org)
*/
public class BitFieldFactory
{
private static Map instances = new HashMap();
public static BitField getInstance(final int mask) {
BitField f = (BitField)instances.get(new Integer(mask));
if (f == null) {
f = new BitField(mask);
instances.put(new Integer(mask), f);
}
return f;
}
} // end public class BitFieldFactory
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