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com.tangosol.util
Class NullImplementation

java.lang.Object
java.lang.ClassLoader
com.tangosol.util.NullImplementation

public class NullImplementation

extends java.lang.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

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 A Collector implementation that does nothing.
static class	NullImplementation.NullContinuation 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.NullMap A Map that contains nothing and does nothing.
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 A PersistenceEnvironment that does nothing.
static class	NullImplementation.NullPersistenceManager A PersistenceManager that does nothing.
static class	NullImplementation.NullPersistentStore 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.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

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 BackingMapManagerContext	getBackingMapManagerContext() Factory method: Obtain a null implementation of a BackingMapManagerContext.
static CacheStore	getCacheStore() Factory method: Obtain a null implementation of a CacheStore.
static java.lang.ClassLoader	getClassLoader() Factory method: Obtain a null implementation of a ClassLoader.
static com.oracle.common.base.Collector	getCollector() Factory method: Obtain a null implementation of a Collector.
static com.oracle.common.base.Continuation	getContinuation() Factory method: Obtain a null implementation of a Continuation.
static Converter	getConverter() Factory method: Obtain a null implementation of a Converter.
static java.io.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 java.util.Enumeration	getEnumeration() Returns an instance of the null enumerator.
static java.lang.Iterable	getIterable() Returns an instance of the null iterable.
static java.util.Iterator	getIterator() Returns an instance of the null iterator.
static java.util.Map	getMap() Returns an instance of the NullMap.
static ObservableMap	getObservableMap() Returns an instance of the NullObservableMap.
static java.io.OutputStream	getOutputStream() Factory method: Obtain a null implementation of a OutputStream.
static PartitionAssignmentStrategy	getPartitionAssignmentStrategy() Factory method: Obtain a null implementation of a PartitionAssignmentStrategy.
static com.oracle.datagrid.persistence.PersistenceEnvironment	getPersistenceEnvironment() Factory method: Obtain a null implementation of a PersistenceEnvironment.
static com.oracle.datagrid.persistence.PersistenceEnvironment	getPersistenceEnvironment(java.lang.Class clz) Factory method: Obtain a null implementation of a PersistenceEnvironment.
static com.oracle.datagrid.persistence.PersistenceManager	getPersistenceManager() Factory method: Obtain a null implementation of a PersistenceManager.
static com.oracle.datagrid.persistence.PersistenceManager	getPersistenceManager(java.lang.Class clz) Factory method: Obtain a null implementation of a PersistenceManager.
static com.oracle.datagrid.persistence.PersistentStore	getPersistentStore() Factory method: Obtain a null implementation of a PersistentStore.
static com.oracle.datagrid.persistence.PersistentStore	getPersistentStore(java.lang.Class 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 java.io.Reader	getReader() Factory method: Obtain a null implementation of a Reader.
static java.util.Set	getSet() Returns an instance of the NullSet.
static ValueExtractor	getValueExtractor() Factory method: Obtain a null implementation of a ValueExtractor.
static java.io.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, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Method Detail

getEnumeration

public static java.util.Enumeration getEnumeration()

Returns an instance of the null enumerator.

Returns:

an Enumeration instance with no values to enumerate.

getIterator

public static java.util.Iterator getIterator()

Returns an instance of the null iterator.

Returns:

an Iterator instance with no values to enumerate.

getIterable

public static java.lang.Iterable getIterable()

Returns an instance of the null iterable.

Returns:

an Iterable that will return a null iterator

getSet

public static java.util.Set getSet()

Returns an instance of the NullSet.

Returns:

an empty immutable Set

getMap

public static java.util.Map 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 java.io.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 java.io.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 java.io.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 java.io.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 Converter 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 ValueExtractor 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 java.lang.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 com.oracle.common.base.Collector getCollector()

Factory method: Obtain a null implementation of a Collector.

Returns:

an implementation of Collector that does as little as possible

getContinuation

public static com.oracle.common.base.Continuation getContinuation()

Factory method: Obtain a null implementation of a Continuation.

Returns:

an implementation of Continuation that does nothing

getPersistenceEnvironment

public static com.oracle.datagrid.persistence.PersistenceEnvironment getPersistenceEnvironment()

Factory method: Obtain a null implementation of a PersistenceEnvironment.

Returns:

an implementation of PersistenceEnvironment that does as little as possible

getPersistenceEnvironment

public static com.oracle.datagrid.persistence.PersistenceEnvironment getPersistenceEnvironment(java.lang.Class 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 com.oracle.datagrid.persistence.PersistenceManager getPersistenceManager()

Factory method: Obtain a null implementation of a PersistenceManager.

Returns:

an implementation of PersistenceManager that does as little as possible

getPersistenceManager

public static com.oracle.datagrid.persistence.PersistenceManager getPersistenceManager(java.lang.Class 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 com.oracle.datagrid.persistence.PersistentStore getPersistentStore()

Factory method: Obtain a null implementation of a PersistentStore.

Returns:

an implementation of PersistentStore that does as little as possible

getPersistentStore

public static com.oracle.datagrid.persistence.PersistentStore getPersistentStore(java.lang.Class 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

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