HashvalueAlgorithm (Apache Ant API)
Keywords: org.apache.tools.ant.types.selectors.modifiedselector.HashvalueAlgorithm class

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## org.apache.tools.ant.types.selectors.modifiedselector
Class HashvalueAlgorithm

    java.lang.Object
      org.apache.tools.ant.types.selectors.modifiedselector.HashvalueAlgorithm

All Implemented Interfaces:
  Algorithm

    public class HashvalueAlgorithm

extends java.lang.Object
implements Algorithm

Computes a 'hashvalue' for the content of file using String.hashValue(). Use of this algorithm doesn't require any additional nested s and doesn't support any.

Since:
  Ant 1.6
Version:
  2003-09-13

Constructor Summary
`HashvalueAlgorithm()`

Method Summary
`java.lang.String` | `getValue(java.io.File file)` Computes a 'hashvalue' for a file content.
`boolean` | `isValid()` This algorithm doesn't need any configuration.
`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 Detail

### HashvalueAlgorithm

    public HashvalueAlgorithm()

Method Detail

### isValid

    public boolean isValid()

  This algorithm doesn't need any configuration. Therefore it's always valid.

  Specified by:
    `isValid` in interface `Algorithm`
  Returns:
    always true

### getValue

    public java.lang.String getValue(java.io.File file)

  Computes a 'hashvalue' for a file content. It reads the content of a file, convert that to String and use the String.hashCode() method.

  Specified by:
    `getValue` in interface `Algorithm`
  Parameters:
    `file` - The file for which the value should be computed
  Returns:
    the hashvalue or null if the file couldn't be read

### toString

    public java.lang.String toString()

  Override Object.toString().

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    information about this comparator

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