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com.tangosol.util
Class NullImplementation.NullFlatRegistry

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

Enclosing class:

NullImplementation

public static class NullImplementation.NullFlatRegistry

extends java.lang.Object

A FlatRegistry that contains nothing.

Field Summary

static NullImplementation.NullFlatRegistry

INSTANCE Since the FlatRegistry contains no information, only one ever has to exist.

Method Summary

boolean	equals(java.lang.Object o)
Entry	getById(int nId) Get a Registry Entry by its ID.
Entry	getByName(java.lang.String sName) Get a Registry Entry by its name.
int	getSize() Determine the number of Entry items that are registered.
int	hashCode()
java.util.Iterator	iterator() Obtain an Iterator of the Entry items in the registry.
void	register(Entry entry) Register an Entry.
void	unregister(Entry entry) Unregister an Entry.

Field Detail

INSTANCE

public static final NullImplementation.NullFlatRegistry INSTANCE

Since the FlatRegistry contains no information, only one ever has to exist.

Method Detail

getByName

public Entry getByName(java.lang.String sName)

Get a Registry Entry by its name.

Parameters:

sName - the name of the Entry to get

Returns:

the Entry that is uniquely identified by the specified name, or null if no Entry is registered with that name

getById

public Entry getById(int nId)

Get a Registry Entry by its ID.

Parameters:

nId - the ID of the Entry to get

Returns:

the Entry that is uniquely identified by the specified ID, or null if no Entry is registered with that ID

getSize

public int getSize()

Determine the number of Entry items that are registered.

Returns:

the number of registered Entry items

iterator

public java.util.Iterator iterator()

Obtain an Iterator of the Entry items in the registry.

Returns:

an Iterator of Entry items

register

public void register(Entry entry)
              throws RegistryException

Register an Entry.

Parameters:

entry - an Entry object

Throws:

java.lang.NullPointerException - if the passed Entry is null

RegistryException - if registration fails

DuplicateIdException - if the Entry ID is not unique

DuplicateNameException - if the Entry name is not unique

InvalidIdException - if the Entry ID is -1 and the registry does not assign IDs, or if the ID is out of range

unregister

public void unregister(Entry entry)
                throws RegistryException

Unregister an Entry.

Parameters:

entry - an Entry object

Throws:

RegistryException

equals

public boolean equals(java.lang.Object o)

hashCode

public int hashCode()

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