looks like I had stuff locally that I forgot to commit (oops) . Thsi patch from Carey Sublette
Makes the event based API abortable. git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352497 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andrew C. Oliver
parent
7d4cd498ce
commit
ee498b5208
@ -0,0 +1,106 @@
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/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2002 The Apache Software Foundation. All rights
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* reserved.
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*
|
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. The end-user documentation included with the redistribution,
|
||||
* if any, must include the following acknowledgment:
|
||||
* "This product includes software developed by the
|
||||
* Apache Software Foundation (http://www.apache.org/)."
|
||||
* Alternately, this acknowledgment may appear in the software itself,
|
||||
* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" and
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* "Apache POI" must not be used to endorse or promote products
|
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* derived from this software without prior written permission. For
|
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* written permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* "Apache POI", nor may "Apache" appear in their name, without
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* prior written permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
|
||||
* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*/
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package org.apache.poi.hssf.eventmodel;
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import org.apache.poi.hssf.record.Record;
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import org.apache.poi.hssf.HSSFUserException;
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/**
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* Interface for use with the HSSFRequest and HSSFEventFactory. Users should create
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* a listener supporting this interface and register it with the HSSFRequest (associating
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* it with Record SID's).
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*
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* @see org.apache.poi.hssf.eventmodel.HSSFEventFactory
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* @see org.apache.poi.hssf.eventmodel.HSSFRequest
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* @see org.apache.poi.hssf.HSSFUserException
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*
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* @author Carey Sublette (careysub@earthling.net)
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*
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*/
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public abstract class AbortableHSSFListener implements HSSFListener
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{
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/**
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* This method, inherited from HSSFListener is implemented as a stub.
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* It is never called by HSSFEventFActory or HSSFRequest.
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*
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*/
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public void processRecord(Record record)
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{
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}
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/**
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* Process an HSSF Record. Called when a record occurs in an HSSF file.
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* Provides two options for halting the processing of the HSSF file.
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*
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* The return value provides a means of non-error termination with a
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* user-defined result code. A value of zero must be returned to
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* continue processing, any other value will halt processing by
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* <code>HSSFEventFactory</code> with the code being passed back by
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* its abortable process events methods.
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*
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* Error termination can be done by throwing the HSSFUserException.
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*
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* Note that HSSFEventFactory will not call the inherited process
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*
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* @return result code of zero for continued processing.
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*
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* @throws HSSFUserException User code can throw this to abort
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* file processing by HSSFEventFactory and return diagnostic information.
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*/
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public abstract short abortableProcessRecord(Record record) throws HSSFUserException;
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}
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@ -59,6 +59,7 @@ import java.io.InputStream;
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import java.io.IOException;
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import org.apache.poi.util.LittleEndian;
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import org.apache.poi.hssf.HSSFUserException;
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import org.apache.poi.hssf.record.RecordFormatException;
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import org.apache.poi.hssf.record.Record;
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import org.apache.poi.hssf.record.RecordFactory;
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@ -76,12 +77,12 @@ import org.apache.poi.poifs.filesystem.POIFSFileSystem;
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*
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* @see org.apache.poi.hssf.dev.EFHSSF
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*
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* @author andy
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* @author Andrew C. Oliver (acoliver at apache dot org)
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* @authro Carey Sublette (careysub@earthling.net)
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*/
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public class HSSFEventFactory
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{
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/** Creates a new instance of HSSFEventFactory */
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public HSSFEventFactory()
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@ -102,9 +103,28 @@ public class HSSFEventFactory
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processEvents(req, in);
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}
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/**
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* Processes a file into essentially record events.
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*
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* @param req an Instance of HSSFRequest which has your registered listeners
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* @param fs a POIFS filesystem containing your workbook
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* @return numeric user-specified result code.
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*/
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public short abortableProcessWorkbookEvents(HSSFRequest req, POIFSFileSystem fs)
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throws IOException, HSSFUserException
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{
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InputStream in = fs.createDocumentInputStream("Workbook");
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return abortableProcessEvents(req, in);
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}
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/**
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* Processes a DocumentInputStream into essentially Record events.
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*
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* If an <code>AbortableHSSFListener</code> causes a halt to processing during this call
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* the method will return just as with <code>abortableProcessEvents</code>, but no
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* user code or <code>HSSFUserException</code> will be passed back.
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*
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* @see org.apache.poi.poifs.filesystem.POIFSFileSystem#createDocumentInputStream(String)
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* @param req an Instance of HSSFRequest which has your registered listeners
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@ -113,74 +133,117 @@ public class HSSFEventFactory
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public void processEvents(HSSFRequest req, InputStream in)
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throws IOException
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{
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try
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{
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genericProcessEvents(req, in);
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}
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catch (HSSFUserException hue)
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{/*If an HSSFUserException user exception is thrown, ignore it.*/ }
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}
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/**
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* Processes a DocumentInputStream into essentially Record events.
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*
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* @see org.apache.poi.poifs.filesystem.POIFSFileSystem#createDocumentInputStream(String)
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* @param req an Instance of HSSFRequest which has your registered listeners
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* @param in a DocumentInputStream obtained from POIFS's POIFSFileSystem object
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* @return numeric user-specified result code.
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*/
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public short abortableProcessEvents(HSSFRequest req, InputStream in)
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throws IOException, HSSFUserException
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{
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try
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{
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byte[] sidbytes = new byte[ 2 ];
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int bytesread = in.read(sidbytes);
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Record rec = null;
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return genericProcessEvents(req, in);
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}
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/**
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* Processes a DocumentInputStream into essentially Record events.
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*
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* @see org.apache.poi.poifs.filesystem.POIFSFileSystem#createDocumentInputStream(String)
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* @param req an Instance of HSSFRequest which has your registered listeners
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* @param in a DocumentInputStream obtained from POIFS's POIFSFileSystem object
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* @param in a DocumentInputStream obtained from POIFS's POIFSFileSystem object
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* @return numeric user-specified result code.
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*/
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while (bytesread > 0)
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{
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short sid = 0;
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protected short genericProcessEvents(HSSFRequest req, InputStream in)
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throws IOException, HSSFUserException
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{
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short userCode = 0;
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process:
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try
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{
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byte[] sidbytes = new byte[ 2 ];
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int bytesread = in.read(sidbytes);
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Record rec = null;
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sid = LittleEndian.getShort(sidbytes);
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if ((rec != null) && (sid != ContinueRecord.sid))
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{
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req.processRecord(rec);
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}
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if (sid != ContinueRecord.sid)
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{
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short size = LittleEndian.readShort(in);
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byte[] data = new byte[ size ];
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while (bytesread > 0)
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{
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short sid = 0;
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if (data.length > 0)
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{
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in.read(data);
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}
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Record[] recs = RecordFactory.createRecord(sid, size,
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data);
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sid = LittleEndian.getShort(sidbytes);
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if ((rec != null) && (sid != ContinueRecord.sid))
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{
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userCode = req.processRecord(rec);
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if (userCode != 0) break process;
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}
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if (sid != ContinueRecord.sid)
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{
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short size = LittleEndian.readShort(in);
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byte[] data = new byte[ size ];
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if (recs.length > 1)
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{ // we know that the multiple
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for (int k = 0; k < (recs.length - 1); k++)
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{ // record situations do not
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req.processRecord(
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recs[ k ]); // contain continue records
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}
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}
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rec = recs[ recs.length - 1 ]; // regardless we'll process
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if (data.length > 0)
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{
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in.read(data);
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}
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Record[] recs = RecordFactory.createRecord(sid, size,
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data);
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// the last record as though
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// it might be continued
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// if there is only one
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// records, it will go here too.
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}
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else
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{ // we do have a continue record
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short size = LittleEndian.readShort(in);
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byte[] data = new byte[ size ];
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if (recs.length > 1)
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{ // we know that the multiple
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for (int k = 0; k < (recs.length - 1); k++)
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{ // record situations do not
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userCode = req.processRecord(
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recs[ k ]); // contain continue records
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if (userCode != 0) break process;
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}
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}
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rec = recs[ recs.length - 1 ]; // regardless we'll process
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if (data.length > 0)
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{
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in.read(data);
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}
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rec.processContinueRecord(data);
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}
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bytesread = in.read(sidbytes); // read next record sid
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}
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if (rec != null)
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{
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req.processRecord(rec);
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}
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}
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catch (IOException e)
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{
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throw new RecordFormatException("Error reading bytes");
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}
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// the last record as though
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// it might be continued
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// if there is only one
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// records, it will go here too.
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}
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else
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{ // we do have a continue record
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short size = LittleEndian.readShort(in);
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byte[] data = new byte[ size ];
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// Record[] retval = new Record[ records.size() ];
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// retval = ( Record [] ) records.toArray(retval);
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// return null;
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if (data.length > 0)
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{
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in.read(data);
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}
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rec.processContinueRecord(data);
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}
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bytesread = in.read(sidbytes); // read next record sid
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}
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if (rec != null)
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{
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userCode = req.processRecord(rec);
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if (userCode != 0) break process;
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}
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}
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catch (IOException e)
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{
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throw new RecordFormatException("Error reading bytes");
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}
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return userCode;
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// Record[] retval = new Record[ records.size() ];
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// retval = ( Record [] ) records.toArray(retval);
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// return null;
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}
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}
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@ -9,7 +9,7 @@
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* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* 1. Redistributions of source userCode must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
@ -59,6 +59,7 @@ import java.util.HashMap;
|
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import java.util.List;
|
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import java.util.ArrayList;
|
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import org.apache.poi.hssf.HSSFUserException;
|
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import org.apache.poi.hssf.record.Record;
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import org.apache.poi.hssf.record.RecordFactory;
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@ -69,7 +70,9 @@ import org.apache.poi.hssf.record.RecordFactory;
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* @see org.apache.poi.hssf.eventmodel.HSSFEventFactory
|
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* @see org.apache.poi.hssf.eventmodel.HSSFListener
|
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* @see org.apache.poi.hssf.dev.EFHSSF
|
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* @author andy
|
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* @see org.apache.poi.hssf.HSSFUserException
|
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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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*/
|
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public class HSSFRequest
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@ -137,14 +140,20 @@ public class HSSFRequest
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}
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}
|
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|
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/**
|
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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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*/
|
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/**
|
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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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*
|
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* Exception and return value added 2002-04-19 by Carey Sublette
|
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*
|
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* @return numeric user-specified result code. If zero continue processing.
|
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* @throws HSSFUserException User exception condition
|
||||
*/
|
||||
|
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protected void processRecord(Record rec)
|
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protected short processRecord(Record rec) throws HSSFUserException
|
||||
{
|
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Object obj = records.get(new Short(rec.getSid()));
|
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short userCode = 0;
|
||||
|
||||
if (obj != null)
|
||||
{
|
||||
@ -152,10 +161,20 @@ public class HSSFRequest
|
||||
|
||||
for (int k = 0; k < listeners.size(); k++)
|
||||
{
|
||||
HSSFListener listener = ( HSSFListener ) listeners.get(k);
|
||||
|
||||
listener.processRecord(rec);
|
||||
Object listenObj = listeners.get(k);
|
||||
if (listenObj instanceof AbortableHSSFListener)
|
||||
{
|
||||
AbortableHSSFListener listener = ( AbortableHSSFListener ) listenObj;
|
||||
userCode = listener.abortableProcessRecord(rec);
|
||||
if (userCode!=0) break;
|
||||
}
|
||||
else
|
||||
{
|
||||
HSSFListener listener = ( HSSFListener ) listenObj;
|
||||
listener.processRecord(rec);
|
||||
}
|
||||
}
|
||||
}
|
||||
return userCode;
|
||||
}
|
||||
}
|
||||
|
||||
140
src/java/org/apache/poi/hssf/eventmodel/HSSFUserException.java
Normal file
140
src/java/org/apache/poi/hssf/eventmodel/HSSFUserException.java
Normal file
@ -0,0 +1,140 @@
|
||||
/* ====================================================================
|
||||
* The Apache Software License, Version 1.1
|
||||
*
|
||||
* Copyright (c) 2000 The Apache Software Foundation. All rights
|
||||
* reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. The end-user documentation included with the redistribution,
|
||||
* if any, must include the following acknowledgment:
|
||||
* "This product includes software developed by the
|
||||
* Apache Software Foundation (http://www.apache.org/)."
|
||||
* Alternately, this acknowledgment may appear in the software itself,
|
||||
* if and wherever such third-party acknowledgments normally appear.
|
||||
*
|
||||
* 4. The names "Apache" and "Apache Software Foundation" must
|
||||
* not be used to endorse or promote products derived from this
|
||||
* software without prior written permission. For written
|
||||
* permission, please contact apache@apache.org.
|
||||
*
|
||||
* 5. Products derived from this software may not be called "Apache",
|
||||
* nor may "Apache" appear in their name, without prior written
|
||||
* permission of the Apache Software Foundation.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
* ====================================================================
|
||||
*
|
||||
* This software consists of voluntary contributions made by many
|
||||
* individuals on behalf of the Apache Software Foundation. For more
|
||||
* information on the Apache Software Foundation, please see
|
||||
* <http://www.apache.org/>.
|
||||
*
|
||||
* Portions of this software are based upon public domain software
|
||||
* originally written at the National Center for Supercomputing Applications,
|
||||
* University of Illinois, Urbana-Champaign.
|
||||
*/
|
||||
|
||||
package org.apache.poi.hssf;
|
||||
|
||||
/**
|
||||
* <p>This exception is provided as a way for API users to throw
|
||||
* exceptions from their event handling code. By doing so they
|
||||
* abort file processing by the HSSFEventFactory and by
|
||||
* catching it from outside the HSSFEventFactory.processEvents
|
||||
* method they can diagnose the cause for the abort.</p>
|
||||
*
|
||||
* <p>The HSSFUserException supports a nested "reason"
|
||||
* throwable, i.e. an exception that caused this one to be thrown.</p>
|
||||
*
|
||||
* <p>The HSSF package does not itself throw any of these
|
||||
* exceptions.</p>
|
||||
*
|
||||
* @author Rainer Klute (klute@rainer-klute.de)
|
||||
* @author Carey Sublette (careysub@earthling.net)
|
||||
* @version HSSFUserException.java,v 1.0
|
||||
* @since 2002-04-19
|
||||
*/
|
||||
public class HSSFUserException extends Exception
|
||||
{
|
||||
|
||||
private Throwable reason;
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* <p>Creates a new {@link HSSFUserException}.</p>
|
||||
*/
|
||||
public HSSFUserException()
|
||||
{
|
||||
super();
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* <p>Creates a new {@link HSSFUserException} with a message
|
||||
* string.</p>
|
||||
*/
|
||||
public HSSFUserException(final String msg)
|
||||
{
|
||||
super(msg);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* <p>Creates a new {@link HSSFUserException} with a reason.</p>
|
||||
*/
|
||||
public HSSFUserException(final Throwable reason)
|
||||
{
|
||||
super();
|
||||
this.reason = reason;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* <p>Creates a new {@link HSSFUserException} with a message string
|
||||
* and a reason.</p>
|
||||
*/
|
||||
public HSSFUserException(final String msg, final Throwable reason)
|
||||
{
|
||||
super(msg);
|
||||
this.reason = reason;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* <p>Returns the {@link Throwable} that caused this exception to
|
||||
* be thrown or <code>null</code> if there was no such {@link
|
||||
* Throwable}.</p>
|
||||
*/
|
||||
public Throwable getReason()
|
||||
{
|
||||
return reason;
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user