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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /xmerge/source/xmerge/java/org/openoffice/xmerge/converter/palm/package-info.java | |
parent | Initial commit. (diff) | |
download | libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xmerge/source/xmerge/java/org/openoffice/xmerge/converter/palm/package-info.java')
-rw-r--r-- | xmerge/source/xmerge/java/org/openoffice/xmerge/converter/palm/package-info.java | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/xmerge/source/xmerge/java/org/openoffice/xmerge/converter/palm/package-info.java b/xmerge/source/xmerge/java/org/openoffice/xmerge/converter/palm/package-info.java new file mode 100644 index 000000000..4cc9fcd90 --- /dev/null +++ b/xmerge/source/xmerge/java/org/openoffice/xmerge/converter/palm/package-info.java @@ -0,0 +1,122 @@ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * 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 . + */ + +/** + * Provides classes for converting Palm database data to/from a + * {@code PalmDocument} object, which can be used by the framework. + * + * <p>This package provides classes that handle the writing of data to an + * {@code OutputStream} object for the {@link + * org.openoffice.xmerge.DocumentSerializer DocumentSerializer} interface for; + * as well as the reading of data from an {@code InputStream} object for the + * framework's {@link org.openoffice.xmerge.DocumentDeserializer + * DocumentDeserializer} interface. Both these framework interfaces are simply + * converters from server-side documents to device specific documents and + * vice-versa. + * Since all Palm databases have a general record oriented format, a Palm + * database converter specific I/O stream format is specified for the Palm sync + * client application to handle the byte stream in a generic way. + * This also means that Palm database converters should read and/or write using + * this I/O stream format as specified in the next section.</p> + * + * <a name="streamformat"></a> + * + * <h2>Palm database converter specific I/O stream format</h2> + * + * <p>Note that the format of the byte stream is not exactly that of a PDB file + * encoding. It does not need to contain the PDB header information nor record + * indices section. Instead, it contains the following ...</p> + * <pre> + * set header + * 4 bytes - creator id + * 4 bytes - type id + * 2 bytes - PDB header version + * 2 bytes - PDB header attribute + * unsigned 2 bytes - number of PDB data to follow + * + * for each PDB, + * 32 bytes - name of PDB i + * unsigned 2 bytes - number of records in PDB i + * + * for each record contained in PDB i, + * 1 byte - record attributes + * unsigned 2 bytes - size of record j in PDB i + * x bytes - data + * </pre> + * + * <p>Note that each PDB section is appended by another if there is more than + * one.</p> + * + * <p>Since the {@code PalmDocument} class takes care of the writing and reading + * of this format through its {@code write} and {@code read} methods, + * respectively, this format shall also be referred to as the <b>PalmDocument + * stream format</b>.</p> + * + * <h2>Usage of the classes for the specified I/O stream</h2> + * + * <p>When converting from a server document to device document(s), the + * framework requires writing the device document(s) to an {@code OutputStream} + * object via the {@code DocumentSerializer} interface. Note that a single + * server document may be converted into multiple PDB's on the Palm device. + * Each worksheet in the document is converted into a {@code PalmDocument}. + * Thus, if there is more than one worksheet in the document, more than one + * {@code PalmDocument} will be produced by the {@code DocumentSerializer}.</p> + * + * <p>A {@code DocumentSerializer} creates a {@code ConvertData} object, which + * contains all of the {@code PalmDocuments}. The {@link + * org.openoffice.xmerge.converter.palm.PalmDocument#write write} method to + * write to the given {@code OutputStream}. + * The {@code PalmDocument} object will take care of writing the data in the + * <a href=#streamformat>specified format</a>.</p> + * + * <p>A {@code DocumentDeserializer} can use the {@code PalmDocument} object's + * {@link org.openoffice.xmerge.converter.palm.PalmDocument#read read} method + * to fill in all the {@code PalmDocument} object's data.</p> + * + * <h2>PDB file encoding/decoding</h2> + * + * <p>The {@code PalmDocument} object's read and write functions are provided by + * the {@code PdbDecoder} and {@code PdbEncoder} objects. + * The {@code PdbEncoder} class provides the functionality of encoding a + * {@code PalmDB} object into an {@code InputStream}, while the + * {@code PdbDecoder} class provides the functionality of decoding a PDB file + * into an {@code OutputStream}.</p> + * + * <p>Refer to the class description of each for usage.</p> + * + * <h2>Important Note</h2> + * + * <p>Methods in these classes are not thread safe for performance reasons. + * Users of these classes will have to make sure that the usage of these classes + * are done in a proper manner. Possibly more on this later.</p> + * + * <h2>TODO list</h2> + * + * <ol> + * <li>Merge the PalmDB, PdbDecoder and PdbEncoder classes into the PalmDocument + * class.</li> + * <li>After reading more on the palm file format spec, I realized that there + * are certain optional fields that may need to be addressed still, like the + * appInfo block and sortInfo block.</li> + * <li>The current PdbDecoder only returns a PalmDB object. There are other + * information that we may want to expose from the PDB decoding process.</li> + * <li>Investigate on different language encoding on the Palm and how that + * affects the PDB name.</li> + * </ol> + */ +package org.openoffice.xmerge.converter.palm; |