net.walend.property
Class SubsetPropertySource

java.lang.Object
  |
  +--net.walend.property.SubsetPropertySource

All Implemented Interfaces:

PropertySource

public class SubsetPropertySource

extends java.lang.Object

implements PropertySource

This class allows access to subsets of a larger PropertySource without constant reuse of the prefix.

Since:

20001130

Author:

David Walend

Field Summary

private PropertySource	parent
private java.lang.String	prefix

Constructor Summary

protected

SubsetPropertySource(java.lang.String prefix, PropertySource parent)

Method Summary

java.lang.String	getPrefix() Return the String prefix for this PropertySource.
java.lang.String	getProperty(java.lang.String key) If the property isn't there, return null.
java.lang.String	getProperty(java.lang.String key, java.lang.String def) If the property isn't there, return default.
java.lang.String	getPropertySafely(java.lang.String key)
PropertySource	getSubsetPropertySource(java.lang.String keyPrefix) Return a PropertySource that contains the subset of these properties based on the prefix.
private boolean	isKeyForSubset(java.lang.String key)
private java.lang.String	makeKey(java.lang.String key)
java.util.Iterator	propertyIterator() Return an iterator of property keys.
private java.lang.String	removePrefix(java.lang.String key)
void	setProperty(java.lang.String key, java.lang.String value) Add or change the value of a property.

Methods inherited from class java.lang.Object

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

Field Detail

parent

private PropertySource parent

prefix

private java.lang.String prefix

Constructor Detail

SubsetPropertySource

protected SubsetPropertySource(java.lang.String prefix,
                               PropertySource parent)

Method Detail

makeKey

private java.lang.String makeKey(java.lang.String key)

isKeyForSubset

private boolean isKeyForSubset(java.lang.String key)

removePrefix

private java.lang.String removePrefix(java.lang.String key)

getProperty

public java.lang.String getProperty(java.lang.String key)

Description copied from interface: PropertySource

If the property isn't there, return null.

Specified by:

getProperty in interface PropertySource

getProperty

public java.lang.String getProperty(java.lang.String key,
                                    java.lang.String def)

Description copied from interface: PropertySource

If the property isn't there, return default.

Specified by:

getProperty in interface PropertySource

getPropertySafely

public java.lang.String getPropertySafely(java.lang.String key)

Specified by:

getPropertySafely in interface PropertySource

propertyIterator

public java.util.Iterator propertyIterator()

Description copied from interface: PropertySource

Return an iterator of property keys.

Specified by:

propertyIterator in interface PropertySource

getPrefix

public java.lang.String getPrefix()

Description copied from interface: PropertySource

Return the String prefix for this PropertySource.

Specified by:

getPrefix in interface PropertySource

getSubsetPropertySource

public PropertySource getSubsetPropertySource(java.lang.String keyPrefix)

Description copied from interface: PropertySource

Return a PropertySource that contains the subset of these properties based on the prefix.

Specified by:

getSubsetPropertySource in interface PropertySource

setProperty

public void setProperty(java.lang.String key,
                        java.lang.String value)

Description copied from interface: PropertySource

Add or change the value of a property.

Specified by:

setProperty in interface PropertySource