Package org.apache.tools.ant.types.selectors.modifiedselector

Class PropertiesfileCache

java.lang.Object

org.apache.tools.ant.types.selectors.modifiedselector.PropertiesfileCache

All Implemented Interfaces:

Cache

public class PropertiesfileCache
extends Object
implements Cache

Use java.util.Properties for storing the values. The use of this Cache-implementation requires the use of the parameter <param name="cache.cachefile" .../> for defining, where to store the properties file. The ModifiedSelector sets the cachefile to the default value cache.properties. Supported <param>s are:

Cache parameters

name	values	description	required
cache.cachefile	path to file	the name of the properties file	yes

Since:

Ant 1.6

Version:

2003-09-13

Constructor Summary

Constructors

Constructor	Description
PropertiesfileCache()	Bean-Constructor.
PropertiesfileCache(File cachefile)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	delete()	Deletes the cache and its underlying file.
Object	get(Object key)	Returns a value for a given key from the cache.
File	getCachefile()	Getter.
boolean	isValid()	This cache is valid if the cachefile is set.
Iterator<String>	iterator()	Returns an iterator over the keys in the cache.
void	load()	Load the cache from underlying properties file.
void	put(Object key, Object value)	Saves a key-value-pair in the cache.
void	save()	Saves modification of the cache.
void	setCachefile(File file)	Setter.
String	toString()	Override Object.toString().

Methods inherited from class java.lang.Object

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

Constructor Details

PropertiesfileCache

public PropertiesfileCache()

Bean-Constructor.

PropertiesfileCache

public PropertiesfileCache(File cachefile)

Constructor.

Parameters:

cachefile - set the cachefile

Method Details

setCachefile

public void setCachefile(File file)

Setter.

Parameters:

file - new value

getCachefile

public File getCachefile()

Getter.

Returns:

the cachefile

isValid

public boolean isValid()

This cache is valid if the cachefile is set.

Specified by:

isValid in interface Cache

Returns:

true if all is ok false otherwise

load

public void load()

Load the cache from underlying properties file.

Specified by:

load in interface Cache

save

public void save()

Saves modification of the cache. Cache is only saved if there is one ore more entries. Because entries can not be deleted by this API, this Cache implementation checks the existence of entries before creating the file for performance optimisation.

Specified by:

save in interface Cache

delete

public void delete()

Deletes the cache and its underlying file.

Specified by:

delete in interface Cache

get

public Object get(Object key)

Returns a value for a given key from the cache.

Specified by:

get in interface Cache

Parameters:

key - the key

Returns:

the stored value

put

public void put(Object key,
 Object value)

Saves a key-value-pair in the cache.

Specified by:

put in interface Cache

Parameters:

key - the key

value - the value

iterator

public Iterator<String> iterator()

Returns an iterator over the keys in the cache.

Specified by:

iterator in interface Cache

Returns:

An iterator over the keys.

toString

public String toString()

Override Object.toString().

Overrides:

toString in class Object

Returns:

information about this cache