org.springframework.util
Class CollectionUtils

java.lang.Object
  org.springframework.util.CollectionUtils

public abstract class CollectionUtils

extends Object

Miscellaneous collection utility methods. Mainly for internal use within the framework.

Since:

1.1.3

Author:

Juergen Hoeller

Constructor Summary

CollectionUtils()

Method Summary

static Object	findValueOfType(Collection coll, Class type) Find a value of the given type in the given collection.
static Object	findValueOfType(Collection coll, Class[] types) Find a value of one of the given types in the given collection: searching the collection for a value of the first type, then searching for a value of the second type, etc.

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionUtils

public CollectionUtils()

Method Detail

findValueOfType

public static Object findValueOfType(Collection coll,
                                     Class type)
                              throws IllegalArgumentException

Find a value of the given type in the given collection.

Parameters:

coll - the collection to search

type - the type to look for

Returns:

a value of the given type found, or null if none

Throws:

IllegalArgumentException - if more than one value of the given type found

findValueOfType

public static Object findValueOfType(Collection coll,
                                     Class[] types)
                              throws IllegalArgumentException

Find a value of one of the given types in the given collection: searching the collection for a value of the first type, then searching for a value of the second type, etc.

Parameters:

coll - the collection to search

types - the types to look for, in prioritized order

Returns:

a of one of the given types found, or null if none

Throws:

IllegalArgumentException - if more than one value of the given type found