public class SimpleAttributeSet extends Object implements MutableAttributeSet, Serializable, Cloneable
AttributeSet.CharacterAttribute, AttributeSet.ColorAttribute, AttributeSet.FontAttribute, AttributeSet.ParagraphAttribute
Modifier and Type | Field and Description |
---|---|
static AttributeSet |
EMPTY
An empty attribute set.
|
NameAttribute, ResolveAttribute
Constructor and Description |
---|
SimpleAttributeSet()
Creates a new attribute set that is initially empty.
|
SimpleAttributeSet(AttributeSet a)
Creates a new
SimpleAttributeSet with the same attributes
and resolve parent as the specified set. |
Modifier and Type | Method and Description |
---|---|
void |
addAttribute(Object name,
Object value)
Adds an attribute with the given
name and value
to the set. |
void |
addAttributes(AttributeSet attributes)
Adds all the attributes from
attributes to this set. |
Object |
clone()
Returns a clone of the attribute set.
|
boolean |
containsAttribute(Object name,
Object value)
Returns true if the given name and value represent an attribute
found either in this AttributeSet or in its resolve parent hierarchy.
|
boolean |
containsAttributes(AttributeSet attributes)
Returns
true of this AttributeSet contains all
of the specified attributes . |
AttributeSet |
copyAttributes()
Creates and returns a copy of this
AttributeSet . |
boolean |
equals(Object obj)
Checks this set for equality with an arbitrary object.
|
Object |
getAttribute(Object name)
Returns the value of the specified attribute, or
null if
there is no attribute with that name. |
int |
getAttributeCount()
Returns the number of attributes stored in this set, plus 1 if a parent
has been specified (the reference to the parent is stored as a special
attribute).
|
Enumeration<?> |
getAttributeNames()
Returns an enumeration of the attribute names.
|
AttributeSet |
getResolveParent()
Returns the resolving parent.
|
int |
hashCode()
Returns a hash code for this instance.
|
boolean |
isDefined(Object attrName)
Returns
true if the given attribute is defined in this set,
and false otherwise. |
boolean |
isEmpty()
Returns
true if the set contains no attributes, and
false otherwise. |
boolean |
isEqual(AttributeSet attr)
Returns true if the given set has the same number of attributes
as this set and
containsAttributes(attr) returns
true . |
void |
removeAttribute(Object name)
Removes the attribute with the specified
name , if this
attribute is defined. |
void |
removeAttributes(AttributeSet attributes)
Removes attributes from this set if they are found in the
given set.
|
void |
removeAttributes(Enumeration<?> names)
Removes the attributes listed in
names . |
void |
setResolveParent(AttributeSet parent)
Sets the reolving parent for this set.
|
String |
toString()
Returns a string representation of this instance, typically used for
debugging purposes.
|
public static final AttributeSet EMPTY
public SimpleAttributeSet()
public SimpleAttributeSet(AttributeSet a)
SimpleAttributeSet
with the same attributes
and resolve parent as the specified set.a
- the attributes (null
not permitted).NullPointerException
- if a
is null
.public void addAttribute(Object name, Object value)
name
and value
to the set. If the set already contains an attribute with the given
name
, the attribute value is updated.addAttribute
in interface MutableAttributeSet
name
- the attribute name (null
not permitted).value
- the value (null
not permitted).NullPointerException
- if either argument is null
.public void addAttributes(AttributeSet attributes)
attributes
to this set.addAttributes
in interface MutableAttributeSet
attributes
- the set of attributes to add (null
not
permitted).NullPointerException
- if attributes
is
null
.public boolean containsAttribute(Object name, Object value)
containsAttribute
in interface AttributeSet
name
- the key for the attributevalue
- the value for the attributepublic boolean containsAttributes(AttributeSet attributes)
true
of this AttributeSet
contains all
of the specified attributes
.containsAttributes
in interface AttributeSet
attributes
- the requested attributestrue
of this AttributeSet
contains all
of the specified attributes
public AttributeSet copyAttributes()
AttributeSet
.copyAttributes
in interface AttributeSet
AttributeSet
public boolean equals(Object obj)
equals
in class Object
obj
- the object (null
permitted).true
if this set is equal to obj
, and
false
otherwise.Object.hashCode()
public Object getAttribute(Object name)
null
if
there is no attribute with that name. If the attribute is not defined
directly in this set, the parent hierarchy (if there is one) will be
used.getAttribute
in interface AttributeSet
name
- the attribute (null
not permitted).key
or
null
if no such attribute is defined in this
AttributeSet
and its resolving parentsNullPointerException
- if name
is null
.public int getAttributeCount()
getAttributeCount
in interface AttributeSet
public Enumeration<?> getAttributeNames()
getAttributeNames
in interface AttributeSet
public AttributeSet getResolveParent()
getResolveParent
in interface AttributeSet
null
).setResolveParent(AttributeSet)
public int hashCode()
hashCode
in class Object
Object.equals(Object)
,
System.identityHashCode(Object)
public boolean isDefined(Object attrName)
true
if the given attribute is defined in this set,
and false
otherwise. The parent attribute set is not
checked.isDefined
in interface AttributeSet
attrName
- the attribute name (null
not permitted).true
if an attribute with the specified name is
defined locally in this AttributeSet
public boolean isEmpty()
true
if the set contains no attributes, and
false
otherwise. Note that the resolving parent is
stored as an attribute, so this method will return false
if
a resolving parent is set.true
if the set contains no attributes, and
false
otherwise.public boolean isEqual(AttributeSet attr)
containsAttributes(attr)
returns
true
.isEqual
in interface AttributeSet
attr
- the attribute set (null
not permitted).NullPointerException
- if attr
is null
.public void removeAttribute(Object name)
name
, if this
attribute is defined. This method will only remove an attribute from
this set, not from the resolving parent.removeAttribute
in interface MutableAttributeSet
name
- the attribute name (null
not permitted).NullPointerException
- if name
is null
.public void removeAttributes(AttributeSet attributes)
attributes
has the same resolving parent as this set, the
parent will be removed from this set.removeAttributes
in interface MutableAttributeSet
attributes
- the attributes (null
not permitted).public void removeAttributes(Enumeration<?> names)
names
.removeAttributes
in interface MutableAttributeSet
names
- the attribute names (null
not permitted).NullPointerException
- if names
is null
or contains any null
values.public void setResolveParent(AttributeSet parent)
Note that the parent is stored as an attribute, and will contribute 1 to
the count returned by getAttributeCount()
.
setResolveParent
in interface MutableAttributeSet
parent
- the parent attribute set (null
not permitted).NullPointerException
- if parent
is null
.setResolveParent(AttributeSet)
public String toString()
toString
in class Object
Object.getClass()
,
Object.hashCode()
,
Class.getName()
,
Integer.toHexString(int)