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## org.apache.commons.compress.changes
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.

This class is immutable
This class is thread-safe

Constructor Summary
`ChangeSetPerformer(ChangeSet changeSet)` Constructs a ChangeSetPerformer with the changes from this ChangeSet

Method Summary
`ChangeSetResults` | `perform(ArchiveInputStream in, ArchiveOutputStream out)` Performs all changes collected in this ChangeSet on the input stream and streams the result to the output stream.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### 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 Detail

### perform

    public ChangeSetResults perform(ArchiveInputStream in,
                                    ArchiveOutputStream out)
                             throws IOException

  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

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Copyright © 2011 The Apache Software Foundation. All Rights Reserved.