From 6f54decfdd7ae3286306530a411a59e782e42df4 Mon Sep 17 00:00:00 2001 From: Nick Burch Date: Tue, 5 May 2009 16:02:06 +0000 Subject: [PATCH] Fix javadocs for AbortableHSSFListener, and add unit test to show it all works git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@771865 13f79535-47bb-0310-9956-ffa450edef68 --- .../eventusermodel/AbortableHSSFListener.java | 16 +-- .../eventmodel/TestAbortableListener.java | 98 +++++++++++++++++++ .../eventmodel/TestEventRecordFactory.java | 1 + 3 files changed, 108 insertions(+), 7 deletions(-) create mode 100644 src/testcases/org/apache/poi/hssf/eventmodel/TestAbortableListener.java diff --git a/src/java/org/apache/poi/hssf/eventusermodel/AbortableHSSFListener.java b/src/java/org/apache/poi/hssf/eventusermodel/AbortableHSSFListener.java index 0bf13359ef..befe4b3567 100644 --- a/src/java/org/apache/poi/hssf/eventusermodel/AbortableHSSFListener.java +++ b/src/java/org/apache/poi/hssf/eventusermodel/AbortableHSSFListener.java @@ -22,26 +22,28 @@ import org.apache.poi.hssf.record.Record; import org.apache.poi.hssf.eventusermodel.HSSFUserException; /** - * Interface for use with the HSSFRequest and HSSFEventFactory. Users should create - * a listener supporting this interface and register it with the HSSFRequest (associating - * it with Record SID's). + * Abstract class for use with the HSSFRequest and HSSFEventFactory, which + * allows for the halting of processing. + * Users should create subclass of this (which implements the usual + * HSSFListener), and then override the #abortableProcessRecord(Record) + * method to do their processing. + * This should then be registered with the HSSFRequest (associating + * it with Record SID's) as usual. * * @see org.apache.poi.hssf.eventusermodel.HSSFEventFactory * @see org.apache.poi.hssf.eventusermodel.HSSFRequest * @see org.apache.poi.hssf.eventusermodel.HSSFUserException * * @author Carey Sublette (careysub@earthling.net) - * */ public abstract class AbortableHSSFListener implements HSSFListener { /** * This method, inherited from HSSFListener is implemented as a stub. - * It is never called by HSSFEventFActory or HSSFRequest. - * + * It is never called by HSSFEventFactory or HSSFRequest. + * You should implement #abortableProcessRecord instead */ - public void processRecord(Record record) { } diff --git a/src/testcases/org/apache/poi/hssf/eventmodel/TestAbortableListener.java b/src/testcases/org/apache/poi/hssf/eventmodel/TestAbortableListener.java new file mode 100644 index 0000000000..1a1253e343 --- /dev/null +++ b/src/testcases/org/apache/poi/hssf/eventmodel/TestAbortableListener.java @@ -0,0 +1,98 @@ +/* ==================================================================== + Licensed to the Apache Software Foundation (ASF) under one or more + contributor license agreements. See the NOTICE file distributed with + this work for additional information regarding copyright ownership. + The ASF licenses this file to You 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.hssf.eventmodel; + +import java.io.ByteArrayInputStream; + +import junit.framework.TestCase; + +import org.apache.poi.hssf.HSSFITestDataProvider; +import org.apache.poi.hssf.eventusermodel.AbortableHSSFListener; +import org.apache.poi.hssf.eventusermodel.HSSFEventFactory; +import org.apache.poi.hssf.eventusermodel.HSSFRequest; +import org.apache.poi.hssf.record.BOFRecord; +import org.apache.poi.hssf.record.EOFRecord; +import org.apache.poi.hssf.record.Record; +import org.apache.poi.poifs.filesystem.POIFSFileSystem; + +public class TestAbortableListener extends TestCase { + protected HSSFITestDataProvider getTestDataProvider(){ + return HSSFITestDataProvider.getInstance(); + } + + public void testAbortingBasics() throws Exception { + AbortableCountingListener l = new AbortableCountingListener(1000); + + HSSFRequest req = new HSSFRequest(); + req.addListenerForAllRecords(l); + + HSSFEventFactory f = new HSSFEventFactory(); + + assertEquals(0, l.seen); + assertEquals(null, l.lastseen); + + POIFSFileSystem fs = new POIFSFileSystem(new ByteArrayInputStream( + getTestDataProvider().getTestDataFileContent("SimpleWithColours.xls") + )); + short res = f.abortableProcessWorkbookEvents(req, fs); + + assertEquals(0, res); + assertEquals(175, l.seen); + assertEquals(EOFRecord.sid, l.lastseen.getSid()); + } + + public void testAbortStops() throws Exception { + AbortableCountingListener l = new AbortableCountingListener(1); + + HSSFRequest req = new HSSFRequest(); + req.addListenerForAllRecords(l); + + HSSFEventFactory f = new HSSFEventFactory(); + + assertEquals(0, l.seen); + assertEquals(null, l.lastseen); + + POIFSFileSystem fs = new POIFSFileSystem(new ByteArrayInputStream( + getTestDataProvider().getTestDataFileContent("SimpleWithColours.xls") + )); + short res = f.abortableProcessWorkbookEvents(req, fs); + + assertEquals(1234, res); + assertEquals(1, l.seen); + assertEquals(BOFRecord.sid, l.lastseen.getSid()); + } + + public static class AbortableCountingListener extends AbortableHSSFListener { + private int abortAfter; + private int seen; + private Record lastseen; + + public AbortableCountingListener(int abortAfter) { + this.abortAfter = abortAfter; + this.seen = 0; + this.lastseen = null; + } + public short abortableProcessRecord(Record record) { + seen++; + lastseen = record; + + if(seen == abortAfter) + return 1234; + return 0; + } + } +} diff --git a/src/testcases/org/apache/poi/hssf/eventmodel/TestEventRecordFactory.java b/src/testcases/org/apache/poi/hssf/eventmodel/TestEventRecordFactory.java index 8825fed700..a81b343a71 100644 --- a/src/testcases/org/apache/poi/hssf/eventmodel/TestEventRecordFactory.java +++ b/src/testcases/org/apache/poi/hssf/eventmodel/TestEventRecordFactory.java @@ -72,6 +72,7 @@ public final class TestEventRecordFactory extends TestCase { factory.processRecords(new ByteArrayInputStream(bytes)); assertTrue("The record listener must be called", wascalled[0]); } + /** * tests that the create record function returns a properly -- 2.39.5