What Is poi-5.2.3.jar?

poi-5.2.3.jar is one of the JAR files for Apache POI 5.2.3, which provides an API for Microsoft document files of Word, Excel, PowerPoint, and Visio.

poi-5.2.3.jar supports Apache POI components that read and write Microsoft's OLE 2 Compound document format, which is used in early versions of Microsoft Office tools like Word 97, Excel 97, PowerPoint 97, etc.

poi-5.2.3.jar is distributed as part of the poi-bin-5.2.3-20220909.zip download file.

JAR File Size and Download Location:

JAR name: poi-5.2.3.jar
Target JDK version: 9

File name: poi.jar, poi-5.2.3.jar
File size: 2964641 bytes
Release date: 09-09-2022
Download: Apache POI Website

Here are Java Source Code files for poi-5.2.3.jar:

⏎ org/apache/poi/poifs/eventfilesystem/POIFSReaderRegistry.java

/* ====================================================================
   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.poifs.eventfilesystem;

import java.util.*;

import org.apache.poi.poifs.filesystem.DocumentDescriptor;
import org.apache.poi.poifs.filesystem.POIFSDocumentPath;

/**
 * A registry for POIFSReaderListeners and the DocumentDescriptors of
 * the documents those listeners are interested in
 */

class POIFSReaderRegistry
{

    // the POIFSReaderListeners who listen to all POIFSReaderEvents
    private Set<POIFSReaderListener> omnivorousListeners;

    // Each mapping in this Map has a key consisting of a
    // POIFSReaderListener and a value cosisting of a Set of
    // DocumentDescriptors for the documents that POIFSReaderListener
    // is interested in; used to efficiently manage the registry
    private Map<POIFSReaderListener, Set<DocumentDescriptor>> selectiveListeners;

    // Each mapping in this Map has a key consisting of a
    // DocumentDescriptor and a value consisting of a Set of
    // POIFSReaderListeners for the document matching that
    // DocumentDescriptor; used when a document is found, to quickly
    // get the listeners interested in that document
    private Map<DocumentDescriptor,Set<POIFSReaderListener>> chosenDocumentDescriptors;

    /**
     * Construct the registry
     */

    POIFSReaderRegistry()
    {
        omnivorousListeners       = new HashSet<>();
        selectiveListeners        = new HashMap<>();
        chosenDocumentDescriptors = new HashMap<>();
    }

    /**
     * register a POIFSReaderListener for a particular document
     *
     * @param listener the listener
     * @param path the path of the document of interest
     * @param documentName the name of the document of interest
     */

    void registerListener(final POIFSReaderListener listener,
                          final POIFSDocumentPath path,
                          final String documentName)
    {
        if (!omnivorousListeners.contains(listener))
        {

            // not an omnivorous listener (if it was, this method is a
            // no-op)
            Set<DocumentDescriptor> descriptors =
                    selectiveListeners.computeIfAbsent(listener, k -> new HashSet<>());

            // this listener has not registered before
            DocumentDescriptor descriptor = new DocumentDescriptor(path, documentName);

            if (descriptors.add(descriptor)) {

                // this listener wasn't already listening for this
                // document -- add the listener to the set of
                // listeners for this document
                Set<POIFSReaderListener> listeners =
                        chosenDocumentDescriptors.computeIfAbsent(descriptor, k -> new HashSet<>());

                // nobody was listening for this document before
                listeners.add(listener);
            }
        }
    }

    /**
     * register for all documents
     *
     * @param listener the listener who wants to get all documents
     */

    void registerListener(final POIFSReaderListener listener)
    {
        if (!omnivorousListeners.contains(listener))
        {

            // wasn't already listening for everything, so drop
            // anything listener might have been listening for and
            // then add the listener to the set of omnivorous
            // listeners
            removeSelectiveListener(listener);
            omnivorousListeners.add(listener);
        }
    }

    /**
     * get am iterator of listeners for a particular document
     *
     * @param path the document path
     * @param name the name of the document
     *
     * @return an Iterator POIFSReaderListeners; may be empty
     */

    Iterable<POIFSReaderListener> getListeners(final POIFSDocumentPath path, final String name)
    {
        Set<POIFSReaderListener> rval = new HashSet<>(omnivorousListeners);
        Set<POIFSReaderListener> selectiveListenersInner =
            chosenDocumentDescriptors.get(new DocumentDescriptor(path, name));

        if (selectiveListenersInner != null)
        {
            rval.addAll(selectiveListenersInner);
        }
        return rval;
    }

    private void removeSelectiveListener(final POIFSReaderListener listener)
    {
        Set<DocumentDescriptor> selectedDescriptors = selectiveListeners.remove(listener);

        if (selectedDescriptors != null) {
            for (DocumentDescriptor selectedDescriptor : selectedDescriptors) {
                dropDocument(listener, selectedDescriptor);
            }
        }
    }

    private void dropDocument(final POIFSReaderListener listener,
                              final DocumentDescriptor descriptor) {
        Set<POIFSReaderListener> listeners = chosenDocumentDescriptors.get(descriptor);

        listeners.remove(listener);
        if (listeners.isEmpty()) {
            chosenDocumentDescriptors.remove(descriptor);
        }
    }
}   // end package scope class POIFSReaderRegistry

⏎ org/apache/poi/poifs/eventfilesystem/POIFSReaderRegistry.java

Or download all of them as a single archive file:

File name: poi-5.2.3-src.zip
File size: 2479830 bytes
Release date: 2022-09-09
Download 

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