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## edu.stanford.smi.protege.util
Class CollectionUtilities

    java.lang.Object
      edu.stanford.smi.protege.util.CollectionUtilities

    public class CollectionUtilities

extends Object

Description of the class

Author:
  Ray Fergerson

Field Summary
`static ArrayList` | `EMPTY_ARRAY_LIST`

Constructor Summary
`CollectionUtilities()`

Method Summary
`static
`<X,Y> void`
` | `apply(Collection<? extends X> c, UnaryFunction<X,Y> function)`
`static boolean` | `containSameItems(Collection c1, Collection c2)`
`static boolean` | `containsAny(Collection c1, Collection c2)` Returns true if there is any element that is common to both collections.
`static
`<X> Collection<X>`
` | `createCollection(X o)`
`static
`<X> List<X>`
` | `createList(X o)`
`static
`<X,Y> Map<X,Y>`
` | `createSmallMap()`
`static boolean` | `equalsList(Collection<?> c1, Collection<?> c2)`
`static boolean` | `equalsSet(Collection c1, Collection c2)`
`static
`<X> X`
` | `getFirstItem(Collection<X> c)` Returns the first item in the collection or null if the collection is empty
`static
`<X> X`
` | `getSoleItem(Collection<X> c)` Returns the first item in the collection.
`static
`<X> Collection<X>`
` | `removeFirst(Collection<X> c)`
`static String` | `toString(Collection collection)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### EMPTY_ARRAY_LIST

    public static final ArrayList EMPTY_ARRAY_LIST

Constructor Detail

### CollectionUtilities

    public CollectionUtilities()

Method Detail

### containSameItems

    public static boolean containSameItems(Collection c1,
                                           Collection c2)

### containsAny

    public static boolean containsAny(Collection c1,
                                      Collection c2)

  Returns true if there is any element that is common to both collections.

### createCollection

    public static <X> Collection<X> createCollection(X o)

### createList

    public static <X> List<X> createList(X o)

### createSmallMap

    public static <X,Y> Map<X,Y> createSmallMap()

### equalsSet

    public static boolean equalsSet(Collection c1,
                                    Collection c2)

### equalsList

    public static boolean equalsList(Collection<?> c1,
                                     Collection<?> c2)

### getFirstItem

    public static <X> X getFirstItem(Collection<X> c)

  Returns the first item in the collection or null if the collection is empty

### getSoleItem

    public static <X> X getSoleItem(Collection<X> c)

  Returns the first item in the collection. Throws an AssertionFailureError if there is not exactly 1 item in the collection. Use getFirstItem() to get the first item of a collection if it is possible that there is either 0 items or more than 1 item in the collection.

### removeFirst

    public static <X> Collection<X> removeFirst(Collection<X> c)

### toString

    public static String toString(Collection collection)

### apply

    public static <X,Y> void apply(Collection<? extends X> c,
                                   UnaryFunction<X,Y> function)

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