org.jdom
Class Attribute

java.lang.Object
  org.jdom.Attribute

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class Attribute
extends java.lang.Object
implements java.io.Serializable, java.lang.Cloneable

An XML attribute. Methods allow the user to obtain the value of the attribute as well as namespace and type information.

Version:

$Revision: 1.1 $, $Date: 2012/04/08 22:47:59 $

Author:

Brett McLaughlin, Jason Hunter, Elliotte Rusty Harold, Wesley Biggs, Victor Toni

See Also:

Serialized Form

Field Summary

static int	CDATA_TYPE Attribute type: the attribute value is a string.
static int	ENTITIES_TYPE Attribute type: the attribute value is a list of entity names.
static int	ENTITY_TYPE Attribute type: the attribute value is the name of an entity.
static int	ENUMERATED_TYPE Attribute type: the attribute value is a name token from an enumeration.
static int	ID_TYPE Attribute type: the attribute value is a unique identifier.
static int	IDREF_TYPE Attribute type: the attribute value is a reference to a unique identifier.
static int	IDREFS_TYPE Attribute type: the attribute value is a list of references to unique identifiers.
protected java.lang.String	name The local name of the Attribute
protected Namespace	namespace The Namespace of the Attribute
static int	NMTOKEN_TYPE Attribute type: the attribute value is a name token.
static int	NMTOKENS_TYPE Attribute type: the attribute value is a list of name tokens.
static int	NOTATION_TYPE Attribute type: the attribute value is the name of a notation.
protected Element	parent Parent element, or null if none
protected int	type The type of the Attribute
static int	UNDECLARED_TYPE Attribute type: the attribute has not been declared or type is unknown.
protected java.lang.String	value The value of the Attribute

Constructor Summary

protected	Attribute() Default, no-args constructor for implementations to use if needed.
	Attribute(java.lang.String name, java.lang.String value) This will create a new Attribute with the specified (local) name and value, and does not place the attribute in a Namespace.
	Attribute(java.lang.String name, java.lang.String value, int type) This will create a new Attribute with the specified (local) name, value and type, and does not place the attribute in a Namespace.
	Attribute(java.lang.String name, java.lang.String value, int type, Namespace namespace) This will create a new Attribute with the specified (local) name, value, and type, and in the provided Namespace.
	Attribute(java.lang.String name, java.lang.String value, Namespace namespace) This will create a new Attribute with the specified (local) name and value, and in the provided Namespace.

Method Summary

java.lang.Object	clone() This will return a clone of this Attribute.
Attribute	detach() This detaches the Attribute from its parent, or does nothing if the Attribute has no parent.
boolean	equals(java.lang.Object ob) This tests for equality of this Attribute to the supplied Object.
int	getAttributeType() This will return the actual declared type of this Attribute.
boolean	getBooleanValue() This gets the effective boolean value of the attribute, or throws a DataConversionException if a conversion can't be performed.
Document	getDocument() This retrieves the owning Document for this Attribute, or null if not a currently a member of a Document.
double	getDoubleValue() This gets the value of the attribute, in double form, and if no conversion can occur, throws a DataConversionException
float	getFloatValue() This gets the value of the attribute, in float form, and if no conversion can occur, throws a DataConversionException
int	getIntValue() This gets the value of the attribute, in int form, and if no conversion can occur, throws a DataConversionException
long	getLongValue() This gets the value of the attribute, in long form, and if no conversion can occur, throws a DataConversionException
java.lang.String	getName() This will retrieve the local name of the Attribute.
Namespace	getNamespace() This will return this Attribute's Namespace.
java.lang.String	getNamespacePrefix() This will retrieve the namespace prefix of the Attribute.
java.lang.String	getNamespaceURI() This returns the URI mapped to this Attribute's prefix.
Element	getParent() This will return the parent of this Attribute.
java.lang.String	getQualifiedName() This will retrieve the qualified name of the Attribute.
java.lang.String	getValue() This will return the actual textual value of this Attribute.
int	hashCode() This returns the hash code for this Attribute.
Attribute	setAttributeType(int type) This will set the type of the Attribute.
Attribute	setName(java.lang.String name) This sets the local name of the Attribute.
Attribute	setNamespace(Namespace namespace) This sets this Attribute's Namespace.
protected Attribute	setParent(Element parent) This will set the parent of this Attribute.
Attribute	setValue(java.lang.String value) This will set the value of the Attribute.
java.lang.String	toString() This returns a String representation of the Attribute, suitable for debugging.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

UNDECLARED_TYPE

public static final int UNDECLARED_TYPE

Attribute type: the attribute has not been declared or type is unknown.

See Also:

getAttributeType(), Constant Field Values

CDATA_TYPE

public static final int CDATA_TYPE

Attribute type: the attribute value is a string.

See Also:

getAttributeType(), Constant Field Values

ID_TYPE

public static final int ID_TYPE

Attribute type: the attribute value is a unique identifier.

See Also:

getAttributeType(), Constant Field Values

IDREF_TYPE

public static final int IDREF_TYPE

Attribute type: the attribute value is a reference to a unique identifier.

See Also:

getAttributeType(), Constant Field Values

IDREFS_TYPE

public static final int IDREFS_TYPE

Attribute type: the attribute value is a list of references to unique identifiers.

See Also:

getAttributeType(), Constant Field Values

ENTITY_TYPE

public static final int ENTITY_TYPE

Attribute type: the attribute value is the name of an entity.

See Also:

getAttributeType(), Constant Field Values

ENTITIES_TYPE

public static final int ENTITIES_TYPE

Attribute type: the attribute value is a list of entity names.

See Also:

getAttributeType(), Constant Field Values

NMTOKEN_TYPE

public static final int NMTOKEN_TYPE

Attribute type: the attribute value is a name token.

According to SAX 2.0 specification, attributes of enumerated types should be reported as "NMTOKEN" by SAX parsers. But the major parsers (Xerces and Crimson) provide specific values that permit to recognize them as ENUMERATED_TYPE.

See Also:

getAttributeType(), Constant Field Values

NMTOKENS_TYPE

public static final int NMTOKENS_TYPE

Attribute type: the attribute value is a list of name tokens.

See Also:

getAttributeType(), Constant Field Values

NOTATION_TYPE

public static final int NOTATION_TYPE

Attribute type: the attribute value is the name of a notation.

See Also:

getAttributeType(), Constant Field Values

ENUMERATED_TYPE

public static final int ENUMERATED_TYPE

Attribute type: the attribute value is a name token from an enumeration.

See Also:

getAttributeType(), Constant Field Values

name

protected java.lang.String name

The local name of the Attribute

namespace

protected transient Namespace namespace

The Namespace of the Attribute

value

protected java.lang.String value

The value of the Attribute

type

protected int type

The type of the Attribute

parent

protected Element parent

Parent element, or null if none

Constructor Detail

Attribute

protected Attribute()

Default, no-args constructor for implementations to use if needed.

Attribute

public Attribute(java.lang.String name,
                 java.lang.String value,
                 Namespace namespace)

This will create a new Attribute with the specified (local) name and value, and in the provided Namespace.

Parameters:

name - String name of Attribute.

value - String value for new attribute.

namespace - Namespace namespace for new attribute.

Throws:

IllegalNameException - if the given name is illegal as an attribute name or if if the new namespace is the default namespace. Attributes cannot be in a default namespace.

IllegalDataException - if the given attribute value is illegal character data (as determined by Verifier.checkCharacterData(java.lang.String)).

Attribute

public Attribute(java.lang.String name,
                 java.lang.String value,
                 int type,
                 Namespace namespace)

This will create a new Attribute with the specified (local) name, value, and type, and in the provided Namespace.

Parameters:

name - String name of Attribute.

value - String value for new attribute.

type - int type for new attribute.

namespace - Namespace namespace for new attribute.

Throws:

IllegalNameException - if the given name is illegal as an attribute name or if if the new namespace is the default namespace. Attributes cannot be in a default namespace.

IllegalDataException - if the given attribute value is illegal character data (as determined by Verifier.checkCharacterData(java.lang.String)) or if the given attribute type is not one of the supported types.

Attribute

public Attribute(java.lang.String name,
                 java.lang.String value)

This will create a new Attribute with the specified (local) name and value, and does not place the attribute in a Namespace.

Note: This actually explicitly puts the Attribute in the "empty" Namespace (Namespace.NO_NAMESPACE).

Parameters:

name - String name of Attribute.

value - String value for new attribute.

Throws:

IllegalNameException - if the given name is illegal as an attribute name.

IllegalDataException - if the given attribute value is illegal character data (as determined by Verifier.checkCharacterData(java.lang.String)).

Attribute

public Attribute(java.lang.String name,
                 java.lang.String value,
                 int type)

This will create a new Attribute with the specified (local) name, value and type, and does not place the attribute in a Namespace.

Note: This actually explicitly puts the Attribute in the "empty" Namespace (Namespace.NO_NAMESPACE).

Parameters:

name - String name of Attribute.

value - String value for new attribute.

type - int type for new attribute.

Throws:

IllegalNameException - if the given name is illegal as an attribute name.

IllegalDataException - if the given attribute value is illegal character data (as determined by Verifier.checkCharacterData(java.lang.String)) or if the given attribute type is not one of the supported types.

Method Detail

getParent

public Element getParent()

This will return the parent of this Attribute. If there is no parent, then this returns null.

Returns:

parent of this Attribute

getDocument

public Document getDocument()

This retrieves the owning Document for this Attribute, or null if not a currently a member of a Document.

Returns:

Document owning this Attribute, or null.

setParent

protected Attribute setParent(Element parent)

This will set the parent of this Attribute.

Parameters:

parent - Element to be new parent.

Returns:

this Attribute modified.

detach

public Attribute detach()

This detaches the Attribute from its parent, or does nothing if the Attribute has no parent.

Returns:

Attribute - this Attribute modified.

getName

public java.lang.String getName()

This will retrieve the local name of the Attribute. For any XML attribute which appears as [namespacePrefix]:[attributeName], the local name of the attribute would be [attributeName]. When the attribute has no namespace, the local name is simply the attribute name.

To obtain the namespace prefix for this attribute, the getNamespacePrefix() method should be used.

Returns:

String - name of this attribute, without any namespace prefix.

setName

public Attribute setName(java.lang.String name)

This sets the local name of the Attribute.

Parameters:

name - the new local name to set

Returns:

Attribute - the attribute modified.

Throws:

IllegalNameException - if the given name is illegal as an attribute name.

getQualifiedName

public java.lang.String getQualifiedName()

This will retrieve the qualified name of the Attribute. For any XML attribute whose name is [namespacePrefix]:[elementName], the qualified name of the attribute would be everything (both namespace prefix and element name). When the attribute has no namespace, the qualified name is simply the attribute's local name.

To obtain the local name of the attribute, the getName() method should be used.

To obtain the namespace prefix for this attribute, the getNamespacePrefix() method should be used.

Returns:

String - full name for this element.

getNamespacePrefix

public java.lang.String getNamespacePrefix()

This will retrieve the namespace prefix of the Attribute. For any XML attribute which appears as [namespacePrefix]:[attributeName], the namespace prefix of the attribute would be [namespacePrefix]. When the attribute has no namespace, an empty String is returned.

Returns:

String - namespace prefix of this attribute.

getNamespaceURI

public java.lang.String getNamespaceURI()

This returns the URI mapped to this Attribute's prefix. If no mapping is found, an empty String is returned.

Returns:

String - namespace URI for this Attribute.

getNamespace

public Namespace getNamespace()

This will return this Attribute's Namespace.

Returns:

Namespace - Namespace object for this Attribute

setNamespace

public Attribute setNamespace(Namespace namespace)

This sets this Attribute's Namespace. If the provided namespace is null, the attribute will have no namespace. The namespace must have a prefix.

Parameters:

namespace - the new namespace

Returns:

Element - the element modified.

Throws:

IllegalNameException - if the new namespace is the default namespace. Attributes cannot be in a default namespace.

getValue

public java.lang.String getValue()

This will return the actual textual value of this Attribute. This will include all text within the quotation marks.

Returns:

String - value for this attribute.

setValue

public Attribute setValue(java.lang.String value)

This will set the value of the Attribute.

Parameters:

value - String value for the attribute.

Returns:

Attribute - this Attribute modified.

Throws:

IllegalDataException - if the given attribute value is illegal character data (as determined by Verifier.checkCharacterData(java.lang.String)).

getAttributeType

public int getAttributeType()

This will return the actual declared type of this Attribute.

Returns:

int - type for this attribute.

setAttributeType

public Attribute setAttributeType(int type)

This will set the type of the Attribute.

Parameters:

type - int type for the attribute.

Returns:

Attribute - this Attribute modified.

Throws:

IllegalDataException - if the given attribute type is not one of the supported types.

toString

public java.lang.String toString()

This returns a String representation of the Attribute, suitable for debugging.

Overrides:

toString in class java.lang.Object

Returns:

String - information about the Attribute

equals

public final boolean equals(java.lang.Object ob)

This tests for equality of this Attribute to the supplied Object.

Overrides:

equals in class java.lang.Object

Parameters:

ob - Object to compare to.

Returns:

boolean - whether the Attribute is equal to the supplied Object.

hashCode

public final int hashCode()

This returns the hash code for this Attribute.

Overrides:

hashCode in class java.lang.Object

Returns:

int - hash code.

clone

public java.lang.Object clone()

This will return a clone of this Attribute.

Overrides:

clone in class java.lang.Object

Returns:

Object - clone of this Attribute.

getIntValue

public int getIntValue()
                throws DataConversionException

This gets the value of the attribute, in int form, and if no conversion can occur, throws a DataConversionException

Returns:

int value of attribute.

Throws:

DataConversionException - when conversion fails.

getLongValue

public long getLongValue()
                  throws DataConversionException

This gets the value of the attribute, in long form, and if no conversion can occur, throws a DataConversionException

Returns:

long value of attribute.

Throws:

DataConversionException - when conversion fails.

getFloatValue

public float getFloatValue()
                    throws DataConversionException

This gets the value of the attribute, in float form, and if no conversion can occur, throws a DataConversionException

Returns:

float value of attribute.

Throws:

DataConversionException - when conversion fails.

getDoubleValue

public double getDoubleValue()
                      throws DataConversionException

This gets the value of the attribute, in double form, and if no conversion can occur, throws a DataConversionException

Returns:

double value of attribute.

Throws:

DataConversionException - when conversion fails.

getBooleanValue

public boolean getBooleanValue()
                        throws DataConversionException

This gets the effective boolean value of the attribute, or throws a DataConversionException if a conversion can't be performed. True values are: "true", "on", "1", and "yes". False values are: "false", "off", "0", and "no". Values are trimmed before comparison. Values other than those listed here throw the exception.

Returns:

boolean value of attribute.

Throws:

DataConversionException - when conversion fails.