Package org.apache.tools.ant.types.selectors.modifiedselector

Class ChecksumAlgorithm

java.lang.Object
org.apache.tools.ant.types.selectors.modifiedselector.ChecksumAlgorithm
All Implemented Interfaces:
Algorithm
public class ChecksumAlgorithm
extends java.lang.Object
implements Algorithm
Computes a 'checksum' for the content of file using java.util.zip.CRC32 and java.util.zip.Adler32. Use of this algorithm doesn't require any additional nested <param>s. Supported <param>s are:
Checksum algorithm parameters
namevaluesdescriptionrequired
algorithm.algorithm ADLER | CRC (default) name of the algorithm the checksum should use no, defaults to CRC
Since:
Ant 1.7
Version:
2004-06-17

  • Constructor Summary

    Constructors 
    Constructor Description
    ChecksumAlgorithm()  

  • Method Summary

    Modifier and Type Method Description
    java.lang.String getValue​(java.io.File file)
    Computes a value for a file content with the specified checksum algorithm.
    void initChecksum()
    Initialize the checksum interface.
    boolean isValid()
    This algorithm supports only CRC and Adler.
    void setAlgorithm​(java.lang.String algorithm)
    Specifies the algorithm to be used to compute the checksum.
    java.lang.String toString()
    Override Object.toString().

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

  • Constructor Details

  • Method Details

    • setAlgorithm

      public void setAlgorithm​(java.lang.String algorithm)
      Specifies the algorithm to be used to compute the checksum. Defaults to "CRC". Other popular algorithms like "ADLER" may be used as well.
      Parameters:
      algorithm - the digest algorithm to use

    • initChecksum

      public void initChecksum()
      Initialize the checksum interface.

    • isValid

      public boolean isValid()
      This algorithm supports only CRC and Adler.
      Specified by:
      isValid in interface Algorithm
      Returns:
      true if all is ok, otherwise false.

    • getValue

      public java.lang.String getValue​(java.io.File file)
      Computes a value for a file content with the specified checksum algorithm.
      Specified by:
      getValue in interface Algorithm
      Parameters:
      file - File object for which the value should be evaluated.
      Returns:
      The value for that file

    • toString

      public java.lang.String toString()
      Override Object.toString().
      Overrides:
      toString in class java.lang.Object
      Returns:
      some information about this algorithm.