DocAttributeSet
, PrintJobAttributeSet
, PrintRequestAttributeSet
, PrintServiceAttributeSet
HashAttributeSet
, HashDocAttributeSet
, HashPrintJobAttributeSet
, HashPrintRequestAttributeSet
, HashPrintServiceAttributeSet
public interface AttributeSet
AttributeSet
specifies the interface for a set of printing attributes. A printing attribute is an object whose class implements interface Attribute
. An attribute set contains a group of attribute values, where duplicate values are not allowed in the set. Furthermore, each value in an attribute set is a member of some category, and at most one value in any particular category is allowed in the set. For an attribute set, the values are Attribute
objects, and the categories are Class
objects. An attribute's category is the class (or interface) at the root of the class hierarchy for that kind of attribute. Note that an attribute object's category may be a superclass of the attribute object's class rather than the attribute object's class itself. An attribute object's category is determined by calling the getCategory()
method defined in interface Attribute
.
The interfaces of an AttributeSet
resemble those of the Java Collections API's java.util.Map
interface, but is more restrictive in the types it will accept, and combines keys and values into an Attribute
.
Attribute sets are used in several places in the Print Service API. In each context, only certain kinds of attributes are allowed to appear in the attribute set, as determined by the tagging interfaces which the attribute class implements -- DocAttribute
, PrintRequestAttribute
, PrintJobAttribute
, and PrintServiceAttribute
. There are four specializations of an attribute set that are restricted to contain just one of the four kinds of attribute -- DocAttributeSet
, PrintRequestAttributeSet
, PrintJobAttributeSet
, and PrintServiceAttributeSet
, respectively. Note that many attribute classes implement more than one tagging interface and so may appear in more than one context.
DocAttributeSet
, containing DocAttribute
s, specifies the characteristics of an individual doc and the print job settings to be applied to an individual doc. PrintRequestAttributeSet
, containing PrintRequestAttribute
s, specifies the settings to be applied to a whole print job and to all the docs in the print job. PrintJobAttributeSet
, containing PrintJobAttribute
s, reports the status of a print job. PrintServiceAttributeSet
, containing PrintServiceAttribute
s, reports the status of a Print Service instance. UnmodifiableSetException
. The Print Service API provides one implementation of interface AttributeSet
, class HashAttributeSet
. A client can use class HashAttributeSet
or provide its own implementation of interface AttributeSet
. The Print Service API also provides implementations of interface AttributeSet
's subinterfaces -- classes HashDocAttributeSet
, HashPrintRequestAttributeSet
, HashPrintJobAttributeSet
, and HashPrintServiceAttributeSet
.
Modifier and Type | Method | Description |
---|---|---|
boolean |
add |
Adds the specified attribute to this attribute set if it is not already present, first removing any existing value in the same attribute category as the specified attribute value. |
boolean |
addAll |
Adds all of the elements in the specified set to this attribute. |
void |
clear() |
Removes all attributes from this attribute set. |
boolean |
containsKey |
Returns true if this attribute set contains an attribute for the specified category. |
boolean |
containsValue |
Returns true if this attribute set contains the given attribute value. |
boolean |
equals |
Compares the specified object with this attribute set for equality. |
Attribute |
get |
Returns the attribute value which this attribute set contains in the given attribute category. |
int |
hashCode() |
Returns the hash code value for this attribute set. |
boolean |
isEmpty() |
Returns true if this attribute set contains no attributes. |
boolean |
remove |
Removes any attribute for this category from this attribute set if present. |
boolean |
remove |
Removes the specified attribute from this attribute set if present. |
int |
size() |
Returns the number of attributes in this attribute set. |
Attribute[] |
toArray() |
Returns an array of the attributes contained in this set. |
Attribute get(Class<?> category)
null
if this attribute set does not contain any attribute value in the given attribute category.category
- attribute category whose associated attribute value is to be returned. It must be a Class
that implements interface Attribute
.null
if this attribute set does not contain any attribute value in the given attribute categoryNullPointerException
- if the category
is null
ClassCastException
- if the category
is not a Class
that implements interface Attribute
boolean add(Attribute attribute)
attribute
- attribute value to be added to this attribute settrue
if this attribute set changed as a result of the call, i.e., the given attribute value was not already a member of this attribute setNullPointerException
- if the attribute
is null
UnmodifiableSetException
- if this attribute set does not support the add()
operationboolean remove(Class<?> category)
category
is null
, then remove()
does nothing and returns false
.category
- attribute category to be removed from this attribute settrue
if this attribute set changed as a result of the call, i.e., the given attribute value had been a member of this attribute setUnmodifiableSetException
- if this attribute set does not support the remove()
operationboolean remove(Attribute attribute)
attribute
is null
, then remove()
does nothing and returns false
.attribute
- attribute value to be removed from this attribute settrue
if this attribute set changed as a result of the call, i.e., the given attribute value had been a member of this attribute setUnmodifiableSetException
- if this attribute set does not support the remove()
operationboolean containsKey(Class<?> category)
true
if this attribute set contains an attribute for the specified category.category
- whose presence in this attribute set is to be testedtrue
if this attribute set contains an attribute value for the specified categoryboolean containsValue(Attribute attribute)
true
if this attribute set contains the given attribute value.attribute
- attribute value whose presence in this attribute set is to be testedtrue
if this attribute set contains the given attribute valueboolean addAll(AttributeSet attributes)
add(Attribute)
operation had been applied to this attribute set successively with each element from the specified set. The behavior of the addAll(AttributeSet)
operation is unspecified if the specified set is modified while the operation is in progress. If the addAll(AttributeSet)
operation throws an exception, the effect on this attribute set's state is implementation dependent; elements from the specified set before the point of the exception may or may not have been added to this attribute set.
attributes
- whose elements are to be added to this attribute settrue
if this attribute set changed as a result of the callUnmodifiableSetException
- if this attribute set does not support the addAll(AttributeSet)
methodNullPointerException
- if some element in the specified set is null
int size()
Integer.MAX_VALUE
elements, returns Integer.MAX_VALUE
.Attribute[] toArray()
Attributes
contained in this set as an array, zero length if the AttributeSet
is emptyvoid clear()
UnmodifiableSetException
- if this attribute set does not support the clear()
operationboolean isEmpty()
true
if this attribute set contains no attributes.true
if this attribute set contains no attributesboolean equals(Object object)
true
if the given object is also an attribute set and the two attribute sets contain the same attribute category-attribute value mappings. This ensures that the equals()
method works properly across different implementations of the AttributeSet
interface.int hashCode()
AttributeSet
. This ensures that t1.equals(t2)
implies that t1.hashCode()==t2.hashCode()
for any two attribute sets t1
and t2
, as required by the general contract of Object.hashCode()
.
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Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/print/attribute/AttributeSet.html