org.apache.tools.ant.util

Class LazyHashtable

public class LazyHashtable extends Hashtable

Hashtable implementation that allows delayed construction of expensive objects All operations that need access to the full list of objects will call initAll() first. Get and put are cheap.

Since: Ant 1.6

Field Summary
protected boolean	initAllDone

Constructor Summary
	LazyHashtable() No arg constructor.

Method Summary
boolean	contains(Object value) Check if the table contains a particular value.
boolean	containsKey(Object value) Check if the table contains a particular key.
boolean	containsValue(Object value) Delegates to `contains`.
Enumeration	elements() Get a enumeration over the elements.
protected void	initAll() Used to be part of init.
boolean	isEmpty() Check if the table is empty.
Enumeration	keys() Get an enumeration over the keys.
int	size() Get the size of the table.

Field Detail

initAllDone

protected boolean initAllDone

Constructor Detail

LazyHashtable

public LazyHashtable()

No arg constructor.

Method Detail

contains

public boolean contains(Object value)

Check if the table contains a particular value.

Parameters: value the value to look for.

Returns: true if the table contains the value.

containsKey

public boolean containsKey(Object value)

Check if the table contains a particular key.

Parameters: value the key to look for.

Returns: true if the table contains key.

containsValue

public boolean containsValue(Object value)

Delegates to contains.

Parameters: value the value to look for.

Returns: true if the table contains the value.

elements

public Enumeration elements()

Get a enumeration over the elements.

Returns: an enumeration.

initAll

protected void initAll()

Used to be part of init. It must be done once - but we delay it until we do need _all_ tasks. Otherwise we just get the tasks that we need, and avoid costly init.

isEmpty

public boolean isEmpty()

Check if the table is empty.

Returns: true if it is.

keys

public Enumeration keys()

Get an enumeration over the keys.

Returns: an enumeration.

size

public int size()

Get the size of the table.

Returns: the size.