Package com.tangosol.util

Class NullImplementation

java.lang.Object

java.lang.ClassLoader

com.tangosol.util.NullImplementation

public class NullImplementation
extends ClassLoader

A collection of classes that do nothing. For each class implemented, a factory method will exist following the naming convention "get" plus the class or interface name.

Author:

cp 2000.08.02

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NullImplementation.NullActionPolicy	An implementation of an ActionPolicy that allows all actions.
static class	NullImplementation.NullAddressProvider	Null implementation of AddressProvider.
static class	NullImplementation.NullBackingMapManagerContext	An implementation of BackingMapManagerContext that does nothing.
static class	NullImplementation.NullCacheStore	An implementation of an CacheStore that does nothing.
static class	NullImplementation.NullCollector<V>	A Collector implementation that does nothing.
static class	NullImplementation.NullContinuation<R>	A Continuation that does nothing.
static class	NullImplementation.NullConverter	A Converter that does nothing.
static class	NullImplementation.NullDeltaCompressor	An implementation of a DeltaCompressor that does nothing and always returns the new stream.
static class	NullImplementation.NullEntryProcessor	An implementation of an EntryProcessor that does nothing and returns Boolean.TRUE as a result of execution.
static class	NullImplementation.NullEnumerator	An empty enumerator.
static class	NullImplementation.NullLongArray<V>	An immutable empty LongArray
static class	NullImplementation.NullMap	A Map that contains nothing and does nothing.
static class	NullImplementation.NullMemberIdentityProvider	An implementation of a MemberIdentityProvider that returns null for all its methods.
static class	NullImplementation.NullObservableMap	An immutable ObservableMap which contains nothing.
static class	NullImplementation.NullOutputStream	An OutputStream that does basically nothing.
static class	NullImplementation.NullPartitionAssignmentStrategy	An implementation of PartitionAssignmentStrategy that does nothing.
static class	NullImplementation.NullPersistenceEnvironment<R>	A PersistenceEnvironment that does nothing.
static class	NullImplementation.NullPersistenceManager<R>	A PersistenceManager that does nothing.
static class	NullImplementation.NullPersistentStore<R>	A PersistentStore that does as little as possible.
static class	NullImplementation.NullPofContext	An implementation of PofContext that does nothing.
static class	NullImplementation.NullPofHandler	An implementation of PofHandler that does nothing.
static class	NullImplementation.NullReader	A reader that does basically nothing.
static class	NullImplementation.NullResourceRegistry	A ResourceRegistry implementation that does nothing.
static class	NullImplementation.NullSet	An immutable set which contains nothing.
static class	NullImplementation.NullValueExtractor	A ValueExtractor that always results in the passed-in value.
static class	NullImplementation.NullWriter	A writer that does basically nothing.

Method Summary

Modifier and Type	Method	Description
static ActionPolicy	getActionPolicy()	Factory method: Obtain a null implementation of an ActionPolicy.
static AddressProvider	getAddressProvider()	Factory method: Obtain a null implementation of an AddressProvider.
static AutoCloseable	getAutoCloseable()	Factory method: Obtain a null implementation of an AutoCloseable.
static BackingMapManagerContext	getBackingMapManagerContext()	Factory method: Obtain a null implementation of a BackingMapManagerContext.
static CacheStore	getCacheStore()	Factory method: Obtain a null implementation of a CacheStore.
static ClassLoader	getClassLoader()	Factory method: Obtain a null implementation of a ClassLoader.
static <V> Collector<V>	getCollector()	Factory method: Obtain a null implementation of a Collector.
static <R> Continuation<R>	getContinuation()	Factory method: Obtain a null implementation of a Continuation.
static <T, R> Converter<T,R>	getConverter()	Factory method: Obtain a null implementation of a Converter.
static DataOutput	getDataOutput()	Factory method: Obtain a null implementation of a DataOutput.
static DeltaCompressor	getDeltaCompressor()	Factory method: Obtain a null implementation of a DeltaCompressor.
static InvocableMap.EntryProcessor	getEntryProcessor()	Factory method: Obtain a null implementation of an EntryProcessor.
static Enumeration	getEnumeration()	Returns an instance of the null enumerator.
static <T> Iterable<T>	getIterable()	Returns an instance of the null iterable.
static <T> Iterator<T>	getIterator()	Returns an instance of the null iterator.
static <V> LongArray<V>	getLongArray()	Returns an immutable empty LongArray.
static <K, V> Map<K,V>	getMap()	Returns an instance of the NullMap.
static MemberIdentityProvider	getMemberIdentityProvider()	Return an instance of a null implementation MemberIdentityProvider.
static ObservableMap	getObservableMap()	Returns an instance of the NullObservableMap.
static OutputStream	getOutputStream()	Factory method: Obtain a null implementation of a OutputStream.
static PartitionAssignmentStrategy	getPartitionAssignmentStrategy()	Factory method: Obtain a null implementation of a PartitionAssignmentStrategy.
static <R> com.oracle.coherence.persistence.PersistenceEnvironment<R>	getPersistenceEnvironment()	Factory method: Obtain a null implementation of a PersistenceEnvironment.
static <R> com.oracle.coherence.persistence.PersistenceEnvironment<R>	getPersistenceEnvironment(Class<R> clz)	Factory method: Obtain a null implementation of a PersistenceEnvironment.
static <R> com.oracle.coherence.persistence.PersistenceManager<R>	getPersistenceManager()	Factory method: Obtain a null implementation of a PersistenceManager.
static <R> com.oracle.coherence.persistence.PersistenceManager<R>	getPersistenceManager(Class<R> clz)	Factory method: Obtain a null implementation of a PersistenceManager.
static <R> com.oracle.coherence.persistence.PersistentStore<R>	getPersistentStore()	Factory method: Obtain a null implementation of a PersistentStore.
static <R> com.oracle.coherence.persistence.PersistentStore<R>	getPersistentStore(Class<R> clz)	Factory method: Obtain a null implementation of a PersistentStore.
static PofContext	getPofContext()	Factory method: Obtain a null implementation of a PofContext.
static PofHandler	getPofHandler()	Factory method: Obtain a null implementation of a PofHandler.
static Reader	getReader()	Factory method: Obtain a null implementation of a Reader.
static ResourceRegistry	getResourceRegistry()	Factory method: Obtain a null implementation of a ResourceRegistry.
static <T> Set<T>	getSet()	Returns an instance of the NullSet.
static <T, E> ValueExtractor<T,E>	getValueExtractor()	Factory method: Obtain a null implementation of a ValueExtractor.
static Writer	getWriter()	Factory method: Obtain a null implementation of a Writer.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findClass, findLibrary, findLoadedClass, findResource, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Method Details

getEnumeration

public static Enumeration getEnumeration()

Returns an instance of the null enumerator.

Returns:

an Enumeration instance with no values to enumerate.

getIterator

public static <T> Iterator<T> getIterator()

Returns an instance of the null iterator.

Returns:

an Iterator instance with no values to enumerate.

getIterable

public static <T> Iterable<T> getIterable()

Returns an instance of the null iterable.

Returns:

an Iterable that will return a null iterator

getSet

public static <T> Set<T> getSet()

Returns an instance of the NullSet.

Returns:

an empty immutable Set

getMap

public static <K,
V> Map<K,V> getMap()

Returns an instance of the NullMap.

Returns:

an empty Map that does nothing

getObservableMap

public static ObservableMap getObservableMap()

Returns an instance of the NullObservableMap.

Returns:

an empty ObservableMap and does nothing

getReader

public static Reader getReader()

Factory method: Obtain a null implementation of a Reader.

Returns:

a conforming implementation of Reader that does as little as possible

getWriter

public static Writer getWriter()

Factory method: Obtain a null implementation of a Writer.

Returns:

a conforming implementation of Writer that does as little as possible

getOutputStream

public static OutputStream getOutputStream()

Factory method: Obtain a null implementation of a OutputStream.

Returns:

a conforming implementation of OutputStream that does as little as possible

getDataOutput

public static DataOutput getDataOutput()

Factory method: Obtain a null implementation of a DataOutput.

Returns:

a conforming implementation of DataOutput that does as little as possible

getConverter

public static <T,
R> Converter<T,R> getConverter()

Factory method: Obtain a null implementation of a Converter.

Returns:

a conforming implementation of Converter that does as little as possible

getValueExtractor

public static <T,
E> ValueExtractor<T,E> getValueExtractor()

Factory method: Obtain a null implementation of a ValueExtractor.

Returns:

a ValueExtractor that does not actually extract anything from the passed value

getClassLoader

public static ClassLoader getClassLoader()

Factory method: Obtain a null implementation of a ClassLoader.

Returns:

a conforming implementation of ClassLoader that does as little as possible

getPofContext

public static PofContext getPofContext()

Factory method: Obtain a null implementation of a PofContext.

Returns:

a conforming implementation of PofContext that does as little as possible

getPofHandler

public static PofHandler getPofHandler()

Factory method: Obtain a null implementation of a PofHandler.

Returns:

a conforming implementation of PofHandler that does as little as possible

getBackingMapManagerContext

public static BackingMapManagerContext getBackingMapManagerContext()

Factory method: Obtain a null implementation of a BackingMapManagerContext.

Returns:

a conforming implementation of BackingMapManagerContext that does as little as possible

getEntryProcessor

public static InvocableMap.EntryProcessor getEntryProcessor()

Factory method: Obtain a null implementation of an EntryProcessor.

Returns:

an EntryProcessor implementation that returns Boolean.FALSE

getDeltaCompressor

public static DeltaCompressor getDeltaCompressor()

Factory method: Obtain a null implementation of a DeltaCompressor.

Returns:

a DeltaCompressor implementation that always returns new buffer

getActionPolicy

public static ActionPolicy getActionPolicy()

Factory method: Obtain a null implementation of an ActionPolicy.

Returns:

an ActionPolicy implementation that allows all actions

getCacheStore

public static CacheStore getCacheStore()

Factory method: Obtain a null implementation of a CacheStore.

Returns:

a CacheStore implementation that does as little as possible

getPartitionAssignmentStrategy

public static PartitionAssignmentStrategy getPartitionAssignmentStrategy()

Factory method: Obtain a null implementation of a PartitionAssignmentStrategy.

Returns:

a PartitionAssignmentStrategy implementation that does as little as possible

getAddressProvider

public static AddressProvider getAddressProvider()

Factory method: Obtain a null implementation of an AddressProvider.

Returns:

an implementation of AddressProvider that does as little as possible

getCollector

public static <V> Collector<V> getCollector()

Factory method: Obtain a null implementation of a Collector.

Returns:

an implementation of Collector that does as little as possible

getContinuation

public static <R> Continuation<R> getContinuation()

Factory method: Obtain a null implementation of a Continuation.

Returns:

an implementation of Continuation that does nothing

getPersistenceEnvironment

public static <R>
com.oracle.coherence.persistence.PersistenceEnvironment<R> getPersistenceEnvironment()

Factory method: Obtain a null implementation of a PersistenceEnvironment.

Returns:

an implementation of PersistenceEnvironment that does as little as possible

getPersistenceEnvironment

public static <R>
com.oracle.coherence.persistence.PersistenceEnvironment<R> getPersistenceEnvironment(Class<R> clz)

Factory method: Obtain a null implementation of a PersistenceEnvironment.

Parameters:

clz - the type of a raw, environment specific object representation

Returns:

an implementation of PersistenceEnvironment that does as little as possible

getPersistenceManager

public static <R>
com.oracle.coherence.persistence.PersistenceManager<R> getPersistenceManager()

Factory method: Obtain a null implementation of a PersistenceManager.

Returns:

an implementation of PersistenceManager that does as little as possible

getPersistenceManager

public static <R>
com.oracle.coherence.persistence.PersistenceManager<R> getPersistenceManager(Class<R> clz)

Factory method: Obtain a null implementation of a PersistenceManager.

Parameters:

clz - the type of a raw, environment specific object representation

Returns:

an implementation of PersistenceManager that does as little as possible

getPersistentStore

public static <R>
com.oracle.coherence.persistence.PersistentStore<R> getPersistentStore()

Factory method: Obtain a null implementation of a PersistentStore.

Returns:

an implementation of PersistentStore that does as little as possible

getPersistentStore

public static <R>
com.oracle.coherence.persistence.PersistentStore<R> getPersistentStore(Class<R> clz)

Factory method: Obtain a null implementation of a PersistentStore.

Parameters:

clz - the type of a raw, environment specific object representation

Returns:

an implementation of PersistentStore that does as little as possible

getResourceRegistry

public static ResourceRegistry getResourceRegistry()

Factory method: Obtain a null implementation of a ResourceRegistry.

Returns:

an implementation of ResourceRegistry that does nothing

getAutoCloseable

public static AutoCloseable getAutoCloseable()

Factory method: Obtain a null implementation of an AutoCloseable.

Returns:

an implementation of an AutoCloseable that does nothing

getLongArray

public static <V> LongArray<V> getLongArray()

Returns an immutable empty LongArray.

Type Parameters:

V - the type of values the LongArray would hold

Returns:

an immutable empty LongArray

getMemberIdentityProvider

public static MemberIdentityProvider getMemberIdentityProvider()

Return an instance of a null implementation MemberIdentityProvider.

Returns:

an instance of a null implementation MemberIdentityProvider