XMLList objects. Adobe Flex, FLEX 2-PROGRAMMING ACTIONSCRIPT 3.0

XML objects

An XML object may represent an XML element, attribute, comment, processing instruction, or text element.

An XML object is classified as having either simple content or complex content . An XML object that has child nodes is classified as having complex content. An XML object is said to have simple content if it is any one of the following: an attribute, a comment, a processing instruction, or a text node.

For example, the following XML object contains complex content, including a comment and a processing instruction:

XML.ignoreComments = false;

XML.ignoreProcessingInstructions = false; var x1:XML =

<order>

<!--This is a comment. -->

<?PROC_INSTR sample ?>

<item id='1'>

<menuName>burger</menuName>

<price>3.95</price>

</item>

<item id='2'>

<menuName>fries</menuName>

<price>1.45</price>

</item>

</order>

As the following example shows, you can now use the comments() and processingInstructions() methods to create new XML objects, a comment and a processing instruction: var x2:XML = x1.comments()[0]; var x3:XML = x1.processingInstructions()[0];

XML properties

The XML class has five static properties:

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The ignoreComments and ignoreProcessingInstructions properties determine whether comments or processing instructions are ignored when the XML object is parsed.

The ignoreWhitespace property determines whether white space characters are ignored in element tags and embedded expressions that are separated only by white space characters.

The prettyIndent a nd prettyPrinting properties are used to format the text that is returned by the toString() and toXMLString() methods of the XML class.

XML objects 315

For details on these properties, see the ActionScript 3.0 Language Reference .

XML methods

The following methods allow you to work with the hierarchical structure of XML objects:

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■ appendChild() child()

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■ childIndex() children() descendants() elements() insertChildAfter()

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■ insertChildBefore() parent()

■ prependChild()

The following methods allow you to work with XML object attributes:

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■ attribute() attributes()

The following methods allow you to you work with XML object properties:

■ hasOwnProperty() propertyIsEnumerable() replace() setChildren()

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The following methods are for working with qualified names and namespaces: addNamespace() inScopeNamespaces() localName() name() namespace() namespaceDeclarations() removeNamespace() setLocalName() setName() setNamespace()

316 Working with XML