Package proguard.io

Class NonClosingDataEntryWriter

java.lang.Object
proguard.io.NonClosingDataEntryWriter
All Implemented Interfaces:
AutoCloseable, DataEntryWriter
public class NonClosingDataEntryWriter extends Object implements DataEntryWriter
This DataEntryWriter delegates to another DataEntryWriter, except for any close() calls.

For example: 

     DataEntryWriter writer = ...

     NonClosingDataEntryWriter nonClosingDataEntryWriter =
         new NonClosingDataEntryWriter(writer);

     DataEntryWriter writer1 = new NonClosingDataEntryWriter(writer);
     DataEntryWriter writer2 = writer;

     ...

     writer1.close();

     ...

     writer2.close();

  • Constructor Details

    • NonClosingDataEntryWriter

      public NonClosingDataEntryWriter(DataEntryWriter dataEntryWriter)
      Creates a new NonClosingDataEntryWriter that won't close its delegate.
      Parameters:
      dataEntryWriter - the DataEntryWriter to which the writing will be delegated.

  • Method Details

    • createDirectory

      public boolean createDirectory(DataEntry dataEntry) throws IOException
      Description copied from interface: DataEntryWriter
      Creates a directory.
      Specified by:
      createDirectory in interface DataEntryWriter
      Parameters:
      dataEntry - the data entry for which the directory is to be created.
      Returns:
      whether the directory has been created.
      Throws:
      IOException

    • sameOutputStream

      public boolean sameOutputStream(DataEntry dataEntry1, DataEntry dataEntry2) throws IOException
      Description copied from interface: DataEntryWriter
      Returns whether the two given data entries would result in the same output stream.
      Specified by:
      sameOutputStream in interface DataEntryWriter
      Parameters:
      dataEntry1 - the first data entry.
      dataEntry2 - the second data entry.
      Throws:
      IOException

    • createOutputStream

      public OutputStream createOutputStream(DataEntry dataEntry) throws IOException
      Description copied from interface: DataEntryWriter
      Creates a new output stream for writing data. The caller is responsible for closing the stream.
      Specified by:
      createOutputStream in interface DataEntryWriter
      Parameters:
      dataEntry - the data entry for which the output stream is to be created.
      Returns:
      the output stream. The stream may be null to indicate that the data entry should not be written.
      Throws:
      IOException

    • close

      public void close() throws IOException
      Description copied from interface: DataEntryWriter
      Finishes writing all data entries.

      Implementations typically create graphs of writers that can split and merge again, possibly even with cycles.

      For splits and merges, implementations need to be idempotent; once closed, subsequent attempts to close a writer have no effect. If needed, the wrapper NonClosingDataEntryWriter can avoid closing a branch prematurely.

      For cycles, implementations must perform any custom behavior, then delegate DataEntryWriter.close() invocations, and only finally clean up. It is possible that delegates call DataEntryWriter.createOutputStream(DataEntry) while DataEntryWriter.close() is in progress.

      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface DataEntryWriter
      Throws:
      IOException

    • println

      public void println(PrintWriter pw, String prefix)
      Description copied from interface: DataEntryWriter
      Prints out the structure of the data entry writer.
      Specified by:
      println in interface DataEntryWriter
      Parameters:
      pw - the print stream to which the structure should be printed.
      prefix - a prefix for every printed line.