CollectionFactory (OWLAPI Model Interfaces and utilities 3.5.0 API)

java.lang.Object
- org.semanticweb.owlapi.util.CollectionFactory

```
public class CollectionFactory
extends Object
```
Author:

Matthew Horridge, The University Of Manchester, Bio-Health Informatics Group, Date: 10-Jan-2007

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`CollectionFactory.ConditionalCopySet<T>` a set implementation that uses a delegate collection for all read-only operations and makes a copy if changes are attempted.
`static class`	`CollectionFactory.ThreadSafeConditionalCopySet<T>` this class behaves like ConditionalCopySet except it is designed to be threadsafe; multiple thread access is regulated by a readwritelock; modifications will create a copy based on SyncSet.

Constructor Summary

Constructors
Constructor and Description

CollectionFactory()

Constructors
Constructor and Description
`CollectionFactory()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static <T> List<T>`	`createList()`
`static <K,V> Map<K,V>`	`createMap()`
`static <T> Set<T>`	`createSet()`
`static <T> Set<T>`	`createSet(Collection<T> c)`
`static <T> Set<T>`	`createSet(int initialCapacity)`
`static <T> Set<T>`	`createSet(T... elements)`
`static <K,V> ConcurrentHashMap<K,V>`	`createSyncMap()`
`static <T> Set<T>`	`createSyncSet()`
`static <K,V> Map<K,WeakReference<V>>`	`createSyncWeakMap()`
`static <T> Set<T>`	`getCopyOnRequestSet(Collection<T> source)`
`static <T> Set<T>`	`getCopyOnRequestSetFromImmutableCollection(Collection<T> source)`
`static <T> Set<T>`	`getCopyOnRequestSetFromMutableCollection(Collection<T> source)`
`static int`	`getExpectedThreads()`
`static <T> Set<T>`	`getThreadSafeCopyOnRequestSet(Set<T> source)`
`static void`	`setExpectedThreads(int value)`

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

- Constructor Detail
  - CollectionFactory
```
public CollectionFactory()
```
- Method Detail
  - setExpectedThreads
```
public static void setExpectedThreads(int value)
```
    Parameters:
    
    value - the number of expected threads that will access threadsafe collections; useful for increasing the concurrency in ConcurrentHashMaps
  - getExpectedThreads
```
public static int getExpectedThreads()
```
    Returns:
    
    The current number of expected threads.
  - createSet
```
public static <T> Set<T> createSet()
```
    Type Parameters:
    
    T - axiom type
    
    Returns:
    
    fresh non threadsafe set
  - createList
```
public static <T> List<T> createList()
```
    Type Parameters:
    
    T - axiom type
    
    Returns:
    
    fresh non threadsafe list
  - createSet
```
public static <T> Set<T> createSet(Collection<T> c)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    c - values to add to the set
    
    Returns:
    
    fresh non threadsafe set
  - createSet
```
public static <T> Set<T> createSet(int initialCapacity)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    initialCapacity - initial capacity for the new set
    
    Returns:
    
    fresh non threadsafe set
  - createMap
```
public static <K,V> Map<K,V> createMap()
```
    Type Parameters:
    
    K - key type
    
    V - value type
    
    Returns:
    
    fresh map
  - createSyncWeakMap
```
public static <K,V> Map<K,WeakReference<V>> createSyncWeakMap()
```
    Type Parameters:
    
    K - key type
    
    V - value type
    
    Returns:
    
    a new weak hashmap wrapped as a synchronized map
  - createSet
```
public static <T> Set<T> createSet(T... elements)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    elements - values to add to the set
    
    Returns:
    
    fresh non threadsafe set
  - createSyncSet
```
public static <T> Set<T> createSyncSet()
```
    Type Parameters:
    
    T - set type
    
    Returns:
    
    fresh threadsafe set
  - createSyncMap
```
public static <K,V> ConcurrentHashMap<K,V> createSyncMap()
```
    Type Parameters:
    
    K - key type
    
    V - value type
    
    Returns:
    
    fresh threadsafe hashmap
  - getCopyOnRequestSet
```
public static <T> Set<T> getCopyOnRequestSet(Collection<T> source)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    source - the collection to lazily copy
    
    Returns:
    
    a lazy defensive copy for source; the source collection will not be copied until a method that modifies the collection gets called, e.g., add(), addAll()
  - getCopyOnRequestSetFromMutableCollection
```
public static <T> Set<T> getCopyOnRequestSetFromMutableCollection(Collection<T> source)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    source - source collection
    
    Returns:
    
    copy on request that builds a list from the input set
  - getCopyOnRequestSetFromImmutableCollection
```
public static <T> Set<T> getCopyOnRequestSetFromImmutableCollection(Collection<T> source)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    source - the source collection
    
    Returns:
    
    copy on request that does not build a list immediately
  - getThreadSafeCopyOnRequestSet
```
public static <T> Set<T> getThreadSafeCopyOnRequestSet(Set<T> source)
```
    Type Parameters:
    
    T - axiom type
    
    Parameters:
    
    source - initial values
    
    Returns:
    
    a threadsafe copy on request set

Class CollectionFactory

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CollectionFactory

Method Detail

setExpectedThreads

getExpectedThreads

createSet

createList

createSet

createSet

createMap

createSyncWeakMap

createSet

createSyncSet

createSyncMap

getCopyOnRequestSet

getCopyOnRequestSetFromMutableCollection

getCopyOnRequestSetFromImmutableCollection

getThreadSafeCopyOnRequestSet