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< > BotCompany Repo | #1034357 // Zip4j_CopySubSetOfZipFile working backup 3 (full speed)

JavaX fragment (include)

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!include once #1034352 // zip4j
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import java.nio.charset.Charset;
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srecord noeq Zip4j_CopySubSetOfZipFile(File zipIn, File zipOut, IPred<S> fileFilter) {
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  delegate ProgressMonitor to net.lingala.zip4j.progress.
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  ZipModel zipModel;
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  new HeaderWriter headerWriter;
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  new ProgressMonitor progressMonitor;
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  int bufferSize = InternalZipConstants.BUFF_SIZE;
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  Charset charset;
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  run {
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    try (var randomAccessFile = new RandomAccessFile(zipIn, RandomAccessFileMode.READ.getValue())) {
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      zipModel = new HeaderReader().readAllHeaders(randomAccessFile, buildConfig());
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      zipModel.setZipFile(zipIn);
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    }
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    temp outputStream = new SplitOutputStream(zipOut);
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    temp inputStream = new RandomAccessFile(zipModel.getZipFile(), RandomAccessFileMode.READ.getValue());
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    long currentFileCopyPointer = 0, runningOffset = 0;
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    L<FileHeader> sortedFileHeaders = sortedByComparator(zipModel.getCentralDirectory().getFileHeaders(), (o1, o2) -> {
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      if (eq(o1.getFileName(), o2.getFileName())) ret 0;
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      ret cmp(o1.getOffsetLocalHeader(), o2.getOffsetLocalHeader());
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    });
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    int count = 0;
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    new L<FileHeader> filteredFileHeaders;
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    for iFileHeader over sortedFileHeaders: {
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      var fileHeader = sortedFileHeaders.get(iFileHeader);
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      var fileHeaderOffset = fileHeader.getOffsetLocalHeader();
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      var nextOffset = getOffsetOfNextEntry(sortedFileHeaders, iFileHeader, zipModel);
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      long fp = outputStream.getFilePointer();
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      long lengthOfCurrentEntry = nextOffset + runningOffset - fp;
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      if (count++ < 10)
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        printVars(+fileHeaderOffset, +nextOffset, +runningOffset, +lengthOfCurrentEntry, +fp);
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      if (!fileFilter.get(fileHeader.getFileName())) {
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        runningOffset -= lengthOfCurrentEntry;
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        currentFileCopyPointer += lengthOfCurrentEntry;
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      } else {
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        addOffsetToFileHeader(fileHeader, runningOffset);
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        filteredFileHeaders.add(fileHeader);
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        // copy complete entry without any changes
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        currentFileCopyPointer += copyFile(inputStream, outputStream,
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          currentFileCopyPointer,
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          lengthOfCurrentEntry, progressMonitor,
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          buildConfig().getBufferSize());
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      }
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    }
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    var endOfCDR = zipModel.getEndOfCentralDirectoryRecord();
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    endOfCDR.setTotalNumberOfEntriesInCentralDirectory(l(filteredFileHeaders));
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    endOfCDR.setTotalNumberOfEntriesInCentralDirectoryOnThisDisk(l(filteredFileHeaders));
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    if (zipModel.isZip64Format()) {
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      zipModel.getZip64EndOfCentralDirectoryRecord().setOffsetStartCentralDirectoryWRTStartDiskNumber(
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        zipModel.getZip64EndOfCentralDirectoryRecord().getOffsetStartCentralDirectoryWRTStartDiskNumber() + runningOffset);
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      zipModel.getZip64EndOfCentralDirectoryRecord().setTotalNumberOfEntriesInCentralDirectoryOnThisDisk(l(filteredFileHeaders));
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      zipModel.getZip64EndOfCentralDirectoryLocator().setOffsetZip64EndOfCentralDirectoryRecord(
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          zipModel.getZip64EndOfCentralDirectoryLocator().getOffsetZip64EndOfCentralDirectoryRecord() + runningOffset);
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    }
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    zipModel.getCentralDirectory().setFileHeaders(filteredFileHeaders);
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    headerWriter.finalizeZipFile(zipModel, outputStream, buildConfig().getCharset());
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  }
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  long getOffsetOfNextEntry(L<FileHeader> sortedFileHeaders,
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    int indexOfFileHeader, ZipModel zipModel) throws ZipException {
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    if (indexOfFileHeader == sortedFileHeaders.size() - 1)
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      ret HeaderUtil.getOffsetStartOfCentralDirectory(zipModel);
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    else
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      ret sortedFileHeaders.get(indexOfFileHeader + 1).getOffsetLocalHeader();
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  }
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  long copyFile(RandomAccessFile randomAccessFile,
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    OutputStream outputStream, long start, long length,
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    ProgressMonitor progressMonitor, int bufferSize) throws IOException {
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    net.lingala.zip4j.util.FileUtils.copyFile(randomAccessFile, outputStream, start, start + length, progressMonitor, bufferSize);
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    ret length;
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  }
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  Zip4jConfig buildConfig() {
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    return new Zip4jConfig(charset, bufferSize);
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  }
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  void addOffsetToFileHeader(FileHeader fileHeader, long offsetToAdd) {
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    fileHeader.setOffsetLocalHeader(fileHeader.getOffsetLocalHeader() + offsetToAdd);
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    if (zipModel.isZip64Format()
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        && fileHeader.getZip64ExtendedInfo() != null
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        && fileHeader.getZip64ExtendedInfo().getOffsetLocalHeader() != -1)
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      fileHeader.getZip64ExtendedInfo().setOffsetLocalHeader(
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        fileHeader.getZip64ExtendedInfo().getOffsetLocalHeader() + offsetToAdd
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      );
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  }
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}

Author comment

Began life as a copy of #1034351

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Travelled to 3 computer(s): bhatertpkbcr, mowyntqkapby, mqqgnosmbjvj

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Snippet ID: #1034357
Snippet name: Zip4j_CopySubSetOfZipFile working backup 3 (full speed)
Eternal ID of this version: #1034357/1
Text MD5: a84eb02a0e1a4555f51603a329586652
Author: stefan
Category: javax / io
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2022-02-03 06:26:00
Source code size: 4573 bytes / 104 lines
Pitched / IR pitched: No / No
Views / Downloads: 146 / 166
Referenced in: [show references]