net.sf.molae.pipe.filter
Class KeyFilter

java.lang.Object
  |
  +--net.sf.molae.pipe.basic.ObjectProxy
        |
        +--net.sf.molae.pipe.filter.KeyFilter

All Implemented Interfaces:

Predicate

public final class KeyFilter

extends ObjectProxy

implements Predicate

Applies the given filter to the key of map entries.

See Also:

KeyFilteredMap

Constructor Summary

KeyFilter(Predicate filter)
Constructs a KeyFilter object.

Method Summary

boolean

evaluate(Object input) Applies the underlying filter to the key of the specified map entry.

Methods inherited from class net.sf.molae.pipe.basic.ObjectProxy

assertNotNull, equals, getBase, hashCode, toString, toVerboseString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

KeyFilter

public KeyFilter(Predicate filter)

Constructs a KeyFilter object.

Parameters:

filter - The filter to apply to the keys.

Throws:

NullPointerException - if the specified object is null.

Method Detail

evaluate

public boolean evaluate(Object input)

Applies the underlying filter to the key of the specified map entry.

Specified by:

evaluate in interface Predicate

Parameters:

input - the map entry to evaluate.

Returns:

true, iff the specified object is a Map.Entry and its key fulfils the condition of the filter associated with this object.