org.apache.camel.util
Class CollectionHelper

java.lang.Object
  org.apache.camel.util.CollectionHelper

public final class CollectionHelper
extends Object

A number of helper methods for working with collections

Version:

$Revision: 785479 $

Method Summary

static void	appendValue(Map map, Object key, Object value) Sets the value of the entry in the map for the given key, though if the map already contains a value for the given key then the value is appended to a list of values.
static String	collectionAsCommaDelimitedString(Collection col)
static String	collectionAsCommaDelimitedString(String[] col)
static <T> Set<T>	createSetContaining(T... contents)
static List	filterList(List list, Object... filters) Filters the given list to skip instanceof filter objects.
static Integer	size(Object value) Returns the size of the collection if it can be determined to be a collection

Methods inherited from class java.lang.Object

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

Method Detail

size

public static Integer size(Object value)

Returns the size of the collection if it can be determined to be a collection

Parameters:

value - the collection

Returns:

the size, or null if not a collection

appendValue

public static void appendValue(Map map,
                               Object key,
                               Object value)

Sets the value of the entry in the map for the given key, though if the map already contains a value for the given key then the value is appended to a list of values.

Parameters:

map - the map to add the entry to

key - the key in the map

value - the value to put in the map

filterList

public static List filterList(List list,
                              Object... filters)

Filters the given list to skip instanceof filter objects.

Parameters:

list - the list

filters - objects to skip

Returns:

a new list without the filtered objects

createSetContaining

public static <T> Set<T> createSetContaining(T... contents)

collectionAsCommaDelimitedString

public static String collectionAsCommaDelimitedString(String[] col)

collectionAsCommaDelimitedString

public static String collectionAsCommaDelimitedString(Collection col)