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/ss/formula/FormulaCellCacheEntrySet.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.ss.formula;

/**
 * A custom implementation of {@link java.util.HashSet} in order to reduce memory consumption.
 *
 * Profiling tests (Oct 2008) have shown that each element {@link FormulaCellCacheEntry} takes
 * around 32 bytes to store in a HashSet, but around 6 bytes to store here.  For Spreadsheets with
 * thousands of formula cells with multiple interdependencies, the savings can be very significant.
 */
final class FormulaCellCacheEntrySet {
    private static final FormulaCellCacheEntry[] EMPTY_ARRAY = { };

    private int _size;
    private FormulaCellCacheEntry[] _arr;

    public FormulaCellCacheEntrySet() {
        _arr = EMPTY_ARRAY;
    }

    public FormulaCellCacheEntry[] toArray() {
        int nItems = _size;
        if (nItems < 1) {
            return EMPTY_ARRAY;
        }
        FormulaCellCacheEntry[] result = new FormulaCellCacheEntry[nItems];
        int j=0;
        for (FormulaCellCacheEntry cce : _arr) {
            if (cce != null) {
                result[j++] = cce;
            }
        }
        if (j!= nItems) {
            throw new IllegalStateException("size mismatch");
        }
        return result;
    }


    public void add(CellCacheEntry cce) {
        if (_size * 3 >= _arr.length * 2) {
            // re-hash
            FormulaCellCacheEntry[] prevArr = _arr;
            FormulaCellCacheEntry[] newArr = new FormulaCellCacheEntry[4 + _arr.length * 3 / 2]; // grow 50%
            for(int i=0; i<prevArr.length; i++) {
                FormulaCellCacheEntry prevCce = _arr[i];
                if (prevCce != null) {
                    addInternal(newArr, prevCce);
                }
            }
            _arr = newArr;
        }
        if (addInternal(_arr, cce)) {
            _size++;
        }
    }


    private static boolean addInternal(CellCacheEntry[] arr, CellCacheEntry cce) {
        int startIx = Math.abs(cce.hashCode() % arr.length);

        for(int i=startIx; i<arr.length; i++) {
            CellCacheEntry item = arr[i];
            if (item == cce) {
                // already present
                return false;
            }
            if (item == null) {
                arr[i] = cce;
                return true;
            }
        }
        for(int i=0; i<startIx; i++) {
            CellCacheEntry item = arr[i];
            if (item == cce) {
                // already present
                return false;
            }
            if (item == null) {
                arr[i] = cce;
                return true;
            }
        }
        throw new IllegalStateException("No empty space found");
    }

    public boolean remove(CellCacheEntry cce) {
        FormulaCellCacheEntry[] arr = _arr;

        if (_size * 3 < _arr.length && _arr.length > 8) {
            // re-hash
            boolean found = false;
            FormulaCellCacheEntry[] prevArr = _arr;
            FormulaCellCacheEntry[] newArr = new FormulaCellCacheEntry[_arr.length / 2]; // shrink 50%
            for(int i=0; i<prevArr.length; i++) {
                FormulaCellCacheEntry prevCce = _arr[i];
                if (prevCce != null) {
                    if (prevCce == cce) {
                        found=true;
                        _size--;
                        // skip it
                        continue;
                    }
                    addInternal(newArr, prevCce);
                }
            }
            _arr = newArr;
            return found;
        }
        // else - usual case
        // delete single element (without re-hashing)

        int startIx = Math.abs(cce.hashCode() % arr.length);

        // note - can't exit loops upon finding null because of potential previous deletes
        for(int i=startIx; i<arr.length; i++) {
            FormulaCellCacheEntry item = arr[i];
            if (item == cce) {
                // found it
                arr[i] = null;
                _size--;
                return true;
            }
        }
        for(int i=0; i<startIx; i++) {
            FormulaCellCacheEntry item = arr[i];
            if (item == cce) {
                // found it
                arr[i] = null;
                _size--;
                return true;
            }
        }
        return false;
    }
}

⏎ org/apache/poi/ss/formula/FormulaCellCacheEntrySet.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
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