121 lines
3.5 KiB
Java
121 lines
3.5 KiB
Java
/* ====================================================================
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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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package org.apache.poi.hssf.eventmodel;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import org.apache.poi.hssf.model.Model;
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import org.apache.poi.hssf.model.Sheet;
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import org.apache.poi.hssf.model.Workbook;
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import org.apache.poi.hssf.record.BOFRecord;
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import org.apache.poi.hssf.record.EOFRecord;
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import org.apache.poi.hssf.record.Record;
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/**
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* ModelFactory creates workbook and sheet models based upon
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* events thrown by them there events from the EventRecordFactory.
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*
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* @see org.apache.poi.hssf.eventmodel.EventRecordFactory
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* @author Andrew C. Oliver acoliver@apache.org
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*/
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public class ModelFactory implements ERFListener
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{
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List listeners;
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Model currentmodel;
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boolean lastEOF;
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/**
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* Constructor for ModelFactory. Does practically nothing.
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*/
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public ModelFactory()
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{
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super();
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listeners = new ArrayList(1);
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}
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/**
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* register a ModelFactoryListener so that it can receive
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* Models as they are created.
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*/
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public void registerListener(ModelFactoryListener listener) {
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listeners.add(listener);
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}
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/**
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* Start processing the Workbook stream into Model events.
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*/
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public void run(InputStream stream) {
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EventRecordFactory factory = new EventRecordFactory(this,null);
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lastEOF = true;
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factory.processRecords(stream);
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}
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//ERFListener
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public boolean processRecord(Record rec)
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{
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if (rec.getSid() == BOFRecord.sid) {
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if (lastEOF != true) {
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throw new RuntimeException("Not yet handled embedded models");
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} else {
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BOFRecord bof = (BOFRecord)rec;
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switch (bof.getType()) {
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case BOFRecord.TYPE_WORKBOOK:
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currentmodel = new Workbook();
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break;
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case BOFRecord.TYPE_WORKSHEET:
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currentmodel = Sheet.createSheet();
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break;
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default:
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throw new RuntimeException("Unsupported model type "+bof.getType());
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}
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}
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}
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if (rec.getSid() == EOFRecord.sid) {
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lastEOF = true;
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throwEvent(currentmodel);
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} else {
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lastEOF = false;
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}
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return true;
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}
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/**
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* Throws the model as an event to the listeners
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* @param model to be thrown
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*/
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private void throwEvent(Model model)
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{
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Iterator i = listeners.iterator();
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while (i.hasNext()) {
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ModelFactoryListener mfl = (ModelFactoryListener) i.next();
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mfl.process(model);
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}
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}
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}
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