/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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using System;
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using System.Collections;
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/* ================================================================
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* About NPOI
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* Author: Tony Qu
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* Author's email: tonyqus (at) gmail.com
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* Author's Blog: tonyqus.wordpress.com.cn (wp.tonyqus.cn)
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* HomePage: http://www.codeplex.com/npoi
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* Contributors:
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*
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* ==============================================================*/
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namespace HH.WMS.Utils.NPOI.Util
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{
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/// <summary>
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/// Returns immutable Btfield instances.
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/// @author Jason Height (jheight at apache dot org)
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/// </summary>
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public class BitFieldFactory
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{
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//use Hashtable to replace HashMap
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private static Hashtable instances = new Hashtable();
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/// <summary>
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/// Gets the instance.
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/// </summary>
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/// <param name="mask">The mask.</param>
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/// <returns></returns>
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public static BitField GetInstance(int mask)
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{
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BitField f = (BitField)instances[mask];
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if (f == null)
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{
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f = new BitField(mask);
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instances[mask] = f;
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}
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return f;
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}
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}
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}
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