Class ChangeSetPerformer

java.lang.Object
org.apache.commons.compress.changes.ChangeSetPerformer

public class ChangeSetPerformer extends Object
Performs ChangeSet operations on a stream. This class is thread safe and can be used multiple times. It operates on a copy of the ChangeSet. If the ChangeSet changes, a new Performer must be created.
  • Field Details

    • changes

      private final Set<Change> changes
  • Constructor Details

    • ChangeSetPerformer

      public ChangeSetPerformer(ChangeSet changeSet)
      Constructs a ChangeSetPerformer with the changes from this ChangeSet
      Parameters:
      changeSet - the ChangeSet which operations are used for performing
  • Method Details

    • perform

      Performs all changes collected in this ChangeSet on the input stream and streams the result to the output stream. Perform may be called more than once. This method finishes the stream, no other entries should be added after that.
      Parameters:
      in - the InputStream to perform the changes on
      out - the resulting OutputStream with all modifications
      Returns:
      the results of this operation
      Throws:
      IOException - if an read/write error occurs
    • perform

      public ChangeSetResults perform(ZipFile in, ArchiveOutputStream out) throws IOException
      Performs all changes collected in this ChangeSet on the ZipFile and streams the result to the output stream. Perform may be called more than once. This method finishes the stream, no other entries should be added after that.
      Parameters:
      in - the ZipFile to perform the changes on
      out - the resulting OutputStream with all modifications
      Returns:
      the results of this operation
      Throws:
      IOException - if an read/write error occurs
      Since:
      1.5
    • perform

      Performs all changes collected in this ChangeSet on the input entries and streams the result to the output stream. This method finishes the stream, no other entries should be added after that.
      Parameters:
      entryIterator - the entries to perform the changes on
      out - the resulting OutputStream with all modifications
      Returns:
      the results of this operation
      Throws:
      IOException - if an read/write error occurs
    • isDeletedLater

      private boolean isDeletedLater(Set<Change> workingSet, ArchiveEntry entry)
      Checks if an ArchiveEntry is deleted later in the ChangeSet. This is necessary if an file is added with this ChangeSet, but later became deleted in the same set.
      Parameters:
      entry - the entry to check
      Returns:
      true, if this entry has an deletion change later, false otherwise
    • copyStream

      private void copyStream(InputStream in, ArchiveOutputStream out, ArchiveEntry entry) throws IOException
      Copies the ArchiveEntry to the Output stream
      Parameters:
      in - the stream to read the data from
      out - the stream to write the data to
      entry - the entry to write
      Throws:
      IOException - if data cannot be read or written