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/* ====================================================================
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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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namespace HH.WMS.Utils.NPOI.HSSF.EventUserModel
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{
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using System;
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using System.Collections;
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using HH.WMS.Utils.NPOI.HSSF.Record;
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/// <summary>
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/// An HSSFRequest object should be constructed registering an instance or multiple
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/// instances of HSSFListener with each Record.sid you wish to listen for.
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/// @author Andrew C. Oliver (acoliver at apache dot org)
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/// @author Carey Sublette (careysub@earthling.net)
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/// </summary>
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public class HSSFRequest
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{
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private Hashtable records;
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/// <summary>
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/// Creates a new instance of HSSFRequest
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/// </summary>
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public HSSFRequest()
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{
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records =
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new Hashtable(50); // most folks won't listen for too many of these
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}
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/// <summary>
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/// Add an event listener for a particular record type. The trick Is you have to know
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/// what the records are for or just start with our examples and build on them. Alternatively,
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/// you CAN call AddListenerForAllRecords and you'll recieve ALL record events in one listener,
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/// but if you like to squeeze every last byte of efficiency out of life you my not like this.
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/// (its sure as heck what I plan to do)
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/// </summary>
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/// <param name="lsnr">for the event</param>
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/// <param name="sid">identifier for the record type this Is the .sid static member on the individual records</param>
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public void AddListener(HSSFListener lsnr, short sid)
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{
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IList list = null;
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Object obj = records[sid];
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if (obj != null)
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{
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list = (IList)obj;
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}
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else
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{
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list = new ArrayList(
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1); // probably most people will use one listener
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list.Add(lsnr);
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records[sid]=list;
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}
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}
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/// <summary>
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/// This Is the equivilent of calling AddListener(myListener, sid) for EVERY
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/// record in the org.apache.poi.hssf.record package. This Is for lazy
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/// people like me. You can call this more than once with more than one listener, but
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/// that seems like a bad thing to do from a practice-perspective Unless you have a
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/// compelling reason to do so (like maybe you send the event two places or log it or
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/// something?).
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/// </summary>
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/// <param name="lsnr">a single listener to associate with ALL records</param>
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public void AddListenerForAllRecords(HSSFListener lsnr)
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{
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short[] rectypes = RecordFactory.GetAllKnownRecordSIDs();
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for (int k = 0; k < rectypes.Length; k++)
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{
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AddListener(lsnr, rectypes[k]);
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}
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}
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/// <summary>
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/// Called by HSSFEventFactory, passes the Record to each listener associated with
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/// a record.sid.
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/// Exception and return value Added 2002-04-19 by Carey Sublette
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/// </summary>
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/// <param name="rec">The record.</param>
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/// <returns>numeric user-specified result code. If zero continue Processing.</returns>
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public short ProcessRecord(Record rec)
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{
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Object obj = records[rec.Sid];
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short userCode = 0;
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if (obj != null)
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{
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IList listeners = (IList)obj;
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for (int k = 0; k < listeners.Count; k++)
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{
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Object listenObj = listeners[k];
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if (listenObj is AbortableHSSFListener)
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{
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AbortableHSSFListener listener = (AbortableHSSFListener)listenObj;
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userCode = listener.AbortableProcessRecord(rec);
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if (userCode != 0) break;
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}
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else
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{
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HSSFListener listener = (HSSFListener)listenObj;
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listener.ProcessRecord(rec);
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}
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}
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}
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return userCode;
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}
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}
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}
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