com.antelmann.util
Class MethodFilter<T>

java.lang.Object
  com.antelmann.util.MethodFilter<T>

All Implemented Interfaces:

Filter<T>

public class MethodFilter<T>
extends Object
implements Filter<T>

a special filter that can filter objects based on the return values of methods that take no parameters and return something but void.

Since:

26. März 2007, 20:22

Author:

Holger Antelmann

Field Summary

Fields inherited from interface com.antelmann.util.Filter

EXCLUDE_ALL_FILTER, INCLUDE_ALL_FILTER

Constructor Summary

MethodFilter(Class<T> type, Map<String,Object> restrictions)
constructs a MethodFilter based on some type and a given map of restrictions.

Method Summary

boolean	accept(T entry) returns true only if the given entry is accepted by this filter
static String[]	getUsableMethodNames(Class<?> c) lists all method names of the given class that take no parameters and return something but void - and are therefore usable as a restriction.

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodFilter

public MethodFilter(Class<T> type,
                    Map<String,Object> restrictions)
             throws IllegalArgumentException

constructs a MethodFilter based on some type and a given map of restrictions.

Parameters:

restrictions - maps method names to their allowed return values. the method names must be methods without parameters that return something but void. The mapped values are compared for equals; in addition, special supported restriction values are Range and Object[] values, unless the return value of the method is just that.

Throws:

IllegalArgumentException

See Also:

Range

Method Detail

accept

public boolean accept(T entry)

Description copied from interface: Filter

returns true only if the given entry is accepted by this filter

Specified by:

accept in interface Filter<T>

getUsableMethodNames

public static String[] getUsableMethodNames(Class<?> c)

lists all method names of the given class that take no parameters and return something but void - and are therefore usable as a restriction. If comparableReturnValuesOnly is true, the return values of the methods must also implement Comparable.