dsto.dfc.collections
Class EmptyPropertySet

java.lang.Object
  dsto.dfc.collections.EmptyPropertySet

All Implemented Interfaces:

PropertySet, Serializable, Cloneable

public class EmptyPropertySet
extends Object
implements PropertySet, Serializable, Cloneable

An empty, unmodifiable property set.

Version:

$Revision$

See Also:

Serialized Form

Field Summary

Fields inherited from interface dsto.dfc.collections.PropertySet

EMPTY_PROPERTY_SET

Constructor Summary

EmptyPropertySet()

Method Summary

void	addPropertyChangeListener(PropertyChangeListener l)
void	addPropertyValue(String propertyName, Object value) Add a values to the end of the list of property values.
void	addPropertyValues(String propertyName, List values) Add a set of values to a property.
Object	clone()
Set	getPropertyNames() The names of defined properties.
Object	getPropertyValue(String propertyName) Get the value of a property.
List	getPropertyValues(String propertyName) The values of a property.
boolean	hasProperty(String propertyName) True if a property has any defined values.
boolean	isModifiable() True if property set may be changed.
void	removeAll() Undefine all properties in the set
void	removeProperty(String propertyName) Remove all values of a property (ie undefine it).
void	removePropertyChangeListener(PropertyChangeListener l)
boolean	removePropertyValue(String propertyName, Object value) Remove the first occurrence of a value from a list of property values.
void	setPropertyValue(String propertyName, Object value)
void	setPropertyValues(String propertyName, List values) Set the values of a property.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyPropertySet

public EmptyPropertySet()

Method Detail

getPropertyNames

public Set getPropertyNames()

Description copied from interface: PropertySet

The names of defined properties.

Specified by:

getPropertyNames in interface PropertySet

Returns:

An immutable set of strings.

getPropertyValues

public List getPropertyValues(String propertyName)

Description copied from interface: PropertySet

The values of a property.

Specified by:

getPropertyValues in interface PropertySet

Parameters:

propertyName - The name of the property.

Returns:

The values for propertyName, or null if no values are defined.

getPropertyValue

public Object getPropertyValue(String propertyName)

Description copied from interface: PropertySet

Get the value of a property. If more than one value exists, the last added value is returned.

Specified by:

getPropertyValue in interface PropertySet

setPropertyValues

public void setPropertyValues(String propertyName,
                              List values)
                       throws UnsupportedOperationException

Description copied from interface: PropertySet

Set the values of a property.

Specified by:

setPropertyValues in interface PropertySet

Throws:

UnsupportedOperationException - if property values cannot be changed.

setPropertyValue

public void setPropertyValue(String propertyName,
                             Object value)
                      throws UnsupportedOperationException

Specified by:

setPropertyValue in interface PropertySet

Throws:

UnsupportedOperationException

removeProperty

public void removeProperty(String propertyName)
                    throws UnsupportedOperationException

Description copied from interface: PropertySet

Remove all values of a property (ie undefine it).

Specified by:

removeProperty in interface PropertySet

Throws:

UnsupportedOperationException - if property values cannot be changed.

hasProperty

public boolean hasProperty(String propertyName)

Description copied from interface: PropertySet

True if a property has any defined values.

Specified by:

hasProperty in interface PropertySet

removeAll

public void removeAll()
               throws UnsupportedOperationException

Description copied from interface: PropertySet

Undefine all properties in the set

Specified by:

removeAll in interface PropertySet

Throws:

UnsupportedOperationException - if property values cannot be changed.

addPropertyValue

public void addPropertyValue(String propertyName,
                             Object value)
                      throws UnsupportedOperationException

Description copied from interface: PropertySet

Add a values to the end of the list of property values.

Specified by:

addPropertyValue in interface PropertySet

Throws:

UnsupportedOperationException - if property values cannot be changed.

addPropertyValues

public void addPropertyValues(String propertyName,
                              List values)
                       throws UnsupportedOperationException

Description copied from interface: PropertySet

Add a set of values to a property.

Specified by:

addPropertyValues in interface PropertySet

Throws:

UnsupportedOperationException - if property values cannot be changed.

removePropertyValue

public boolean removePropertyValue(String propertyName,
                                   Object value)
                            throws UnsupportedOperationException

Description copied from interface: PropertySet

Remove the first occurrence of a value from a list of property values.

Specified by:

removePropertyValue in interface PropertySet

Returns:

True if the property set was changed (ie a value was removed).

Throws:

UnsupportedOperationException - if property values cannot be changed.

isModifiable

public boolean isModifiable()

Description copied from interface: PropertySet

True if property set may be changed.

Specified by:

isModifiable in interface PropertySet

clone

public Object clone()
             throws CloneNotSupportedException

Specified by:

clone in interface PropertySet

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener l)

Specified by:

addPropertyChangeListener in interface PropertySet

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener l)

Specified by:

removePropertyChangeListener in interface PropertySet