Class SimpleAttributeSet

public class SimpleAttributeSet
extends Object
implements MutableAttributeSet, Serializable, Cloneable

A straightforward implementation of MutableAttributeSet using a hash table.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.

Fields

EMPTY

public static final AttributeSet EMPTY

An empty attribute set.

Constructors

SimpleAttributeSet

public SimpleAttributeSet()

Creates a new attribute set.

SimpleAttributeSet

public SimpleAttributeSet(AttributeSet source)

Creates a new attribute set based on a supplied set of attributes.

Parameters:

source - the set of attributes

Methods

isEmpty

public boolean isEmpty()

Checks whether the set of attributes is empty.

Returns:

true if the set is empty else false

getAttributeCount

public int getAttributeCount()

Gets a count of the number of attributes.

Specified by:

getAttributeCount in interface AttributeSet

Returns:

the count

isDefined

public boolean isDefined(Object attrName)

Tells whether a given attribute is defined.

Specified by:

isDefined in interface AttributeSet

Parameters:

attrName - the attribute name

Returns:

true if the attribute is defined

isEqual

public boolean isEqual(AttributeSet attr)

Compares two attribute sets.

Specified by:

isEqual in interface AttributeSet

Parameters:

attr - the second attribute set

Returns:

true if the sets are equal, false otherwise

copyAttributes

public AttributeSet copyAttributes()

Makes a copy of the attributes.

Specified by:

copyAttributes in interface AttributeSet

Returns:

the copy

getAttributeNames

public Enumeration<?> getAttributeNames()

Gets the names of the attributes in the set.

Specified by:

getAttributeNames in interface AttributeSet

Returns:

the names as an Enumeration

getAttribute

public Object getAttribute(Object name)

Gets the value of an attribute.

Specified by:

getAttribute in interface AttributeSet

Parameters:

name - the attribute name

Returns:

the value

containsAttribute

public boolean containsAttribute(Object name,
                                 Object value)

Checks whether the attribute list contains a specified attribute name/value pair.

Specified by:

containsAttribute in interface AttributeSet

Parameters:

name - the name

value - the value

Returns:

true if the name/value pair is in the list

containsAttributes

public boolean containsAttributes(AttributeSet attributes)

Checks whether the attribute list contains all the specified name/value pairs.

Specified by:

containsAttributes in interface AttributeSet

Parameters:

attributes - the attribute list

Returns:

true if the list contains all the name/value pairs

addAttribute

public void addAttribute(Object name,
                         Object value)

Adds an attribute to the list.

Specified by:

addAttribute in interface MutableAttributeSet

Parameters:

name - the attribute name

value - the attribute value

addAttributes

public void addAttributes(AttributeSet attributes)

Adds a set of attributes to the list.

Specified by:

addAttributes in interface MutableAttributeSet

Parameters:

attributes - the set of attributes to add

removeAttribute

public void removeAttribute(Object name)

Removes an attribute from the list.

Specified by:

removeAttribute in interface MutableAttributeSet

Parameters:

name - the attribute name

removeAttributes

public void removeAttributes(Enumeration<?> names)

Removes a set of attributes from the list.

Specified by:

removeAttributes in interface MutableAttributeSet

Parameters:

names - the set of names to remove

removeAttributes

public void removeAttributes(AttributeSet attributes)

Removes a set of attributes from the list.

Specified by:

removeAttributes in interface MutableAttributeSet

Parameters:

attributes - the set of attributes to remove

getResolveParent

public AttributeSet getResolveParent()

Gets the resolving parent. This is the set of attributes to resolve through if an attribute isn't defined locally. This is null if there are no other sets of attributes to resolve through.

Specified by:

getResolveParent in interface AttributeSet

Returns:

the parent

setResolveParent

public void setResolveParent(AttributeSet parent)

Sets the resolving parent.

Specified by:

setResolveParent in interface MutableAttributeSet

Parameters:

parent - the parent

clone

public Object clone()

Clones a set of attributes.

Overrides:

clone in class Object

Returns:

the new set of attributes

See Also:

Cloneable

hashCode

public int hashCode()

Returns a hashcode for this set of attributes.

Overrides:

hashCode in class Object

Returns:

a hashcode value for this set of attributes.

See Also:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

equals

public boolean equals(Object obj)

Compares this object to the specified object. The result is true if the object is an equivalent set of attributes.

Overrides:

equals in class Object

Parameters:

obj - the object to compare this attribute set with

Returns:

true if the objects are equal; false otherwise

See Also:

Object.hashCode(), HashMap

toString

public String toString()

Converts the attribute set to a String.

Overrides:

toString in class Object

Returns:

the string