Inheritance diagram for Attributes:
Public Methods | |
Constructors and Destructor | |
Attributes () | |
virtual | ~Attributes () |
The virtual attribute list interface | |
virtual unsigned int | getLength () const=0 |
virtual const XMLCh * | getURI (const unsigned int index) const=0 |
virtual const XMLCh * | getLocalName (const unsigned int index) const=0 |
virtual const XMLCh * | getQName (const unsigned int index) const=0 |
virtual const XMLCh * | getType (const unsigned int index) const=0 |
virtual const XMLCh * | getValue (const unsigned int index) const=0 |
virtual int | getIndex (const XMLCh *const uri, const XMLCh *const localPart) const=0 |
virtual int | getIndex (const XMLCh *const qName) const=0 |
virtual const XMLCh * | getType (const XMLCh *const uri, const XMLCh *const localPart) const=0 |
virtual const XMLCh * | getType (const XMLCh *const qName) const=0 |
virtual const XMLCh * | getValue (const XMLCh *const uri, const XMLCh *const localPart) const=0 |
virtual const XMLCh * | getValue (const XMLCh *const qName) const=0 |
The SAX2 parser implements this interface and passes an instance to the SAX2 application as the last argument of each startElement event.
The instance provided will return valid results only during the scope of the startElement invocation (to save it for future use, the application must make a copy: the AttributesImpl helper class provides a convenient constructor for doing so).
An Attributes includes only attributes that have been specified or defaulted: #IMPLIED attributes will not be included.
There are two ways for the SAX application to obtain information from the Attributes. First, it can iterate through the entire list:
public void startElement (String uri, String localpart, String qName, Attributes atts) { for (int i = 0; i < atts.getLength(); i++) { String Qname = atts.getQName(i); String URI = atts.getURI(i) String local = atts.GetLocalName(i) String type = atts.getType(i); String value = atts.getValue(i); [...] } }
(Note that the result of getLength() will be zero if there are no attributes.)
As an alternative, the application can request the value or type of specific attributes:
public void startElement (String uri, String localpart, String qName, Attributes atts) { String identifier = atts.getValue("id"); String label = atts.getValue("label"); [...] }
The AttributesImpl helper class provides a convenience implementation for use by parser or application writers.
AttributesImpl#AttributesImpl
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Default constructor |
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Destructor |
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Look up the index of an attribute by XML 1.0 qualified name.
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Look up the index of an attribute by Namespace name.
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Return the number of attributes in this list. The SAX parser may provide attributes in any arbitrary order, regardless of the order in which they were declared or specified. The number of attributes may be zero.
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Return the local name of an attribute in this list (by position). The QNames must be unique: the SAX parser shall not include the same attribute twice. Attributes without values (those declared #IMPLIED without a value specified in the start tag) will be omitted from the list.
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Return the qName of an attribute in this list (by position). The QNames must be unique: the SAX parser shall not include the same attribute twice. Attributes without values (those declared #IMPLIED without a value specified in the start tag) will be omitted from the list.
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Look up an attribute's type by XML 1.0 qualified name. See getType for a description of the possible types.
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Look up an attribute's type by Namespace name. See getType for a description of the possible types.
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Return the type of an attribute in the list (by position). The attribute type is one of the strings "CDATA", "ID", "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", or "NOTATION" (always in upper case). If the parser has not read a declaration for the attribute, or if the parser does not report attribute types, then it must return the value "CDATA" as stated in the XML 1.0 Recommentation (clause 3.3.3, "Attribute-Value Normalization"). For an enumerated attribute that is not a notation, the parser will report the type as "NMTOKEN".
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Return the namespace URI of an attribute in this list (by position). The QNames must be unique: the SAX parser shall not include the same attribute twice. Attributes without values (those declared #IMPLIED without a value specified in the start tag) will be omitted from the list.
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Look up an attribute's value by XML 1.0 qualified name. See getValue for a description of the possible values.
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Look up an attribute's value by Namespace name. See getValue for a description of the possible values.
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Return the value of an attribute in the list (by position). If the attribute value is a list of tokens (IDREFS, ENTITIES, or NMTOKENS), the tokens will be concatenated into a single string separated by whitespace.
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