Class XSLIf

java.lang.Object
net.sf.saxon.tree.linked.NodeImpl
net.sf.saxon.tree.linked.ParentNodeImpl
net.sf.saxon.tree.linked.ElementImpl
net.sf.saxon.style.StyleElement
net.sf.saxon.style.XSLIf
All Implemented Interfaces:
Serializable, Source, SourceLocator, LocationProvider, SaxonLocator, PullEvent, Container, FingerprintedNode, Item<NodeInfo>, MutableNodeInfo, NamespaceResolver, NodeInfo, ValueRepresentation<NodeInfo>, InstructionInfo, SiblingCountingNode, Locator
public class XSLIf extends StyleElement
Handler for xsl:if elements in stylesheet.
The xsl:if element has a mandatory attribute test, a boolean expression. The content is output if the test condition is true.
See Also:

  • Constructor Details

    • XSLIf

      public XSLIf()

  • Method Details

    • isInstruction

      public boolean isInstruction()
      Determine whether this node is an instruction.
      Overrides:
      isInstruction in class StyleElement
      Returns:
      true - it is an instruction

    • getReturnedItemType

      protected ItemType getReturnedItemType()
      Determine the type of item returned by this instruction (only relevant if it is an instruction).
      Overrides:
      getReturnedItemType in class StyleElement
      Returns:
      the item type returned

    • mayContainSequenceConstructor

      public boolean mayContainSequenceConstructor()
      Determine whether this type of element is allowed to contain a template-body
      Overrides:
      mayContainSequenceConstructor in class StyleElement
      Returns:
      true: yes, it may contain a template-body

    • prepareAttributes

      public void prepareAttributes() throws XPathException
      Description copied from class: StyleElement
      Set the attribute list for the element. This is called to process the attributes (note the distinction from processAttributes in the superclass). Must be supplied in a subclass
      Specified by:
      prepareAttributes in class StyleElement
      Throws:
      XPathException - if a static error is detected

    • prepareTestAttribute

      public static Expression prepareTestAttribute(StyleElement se) throws XPathException
      Process all the attributes, for an element where the only permitted attribute is "test"
      Parameters:
      se - the containing element
      Returns:
      the expression represented by the test attribute, or null if the attribute is absent
      Throws:
      XPathException - if an error is encountered

    • validate

      public void validate(Declaration decl) throws XPathException
      Description copied from class: StyleElement
      Check that the stylesheet element is valid. This is called once for each element, after the entire tree has been built. As well as validation, it can perform first-time initialisation. The default implementation does nothing; it is normally overriden in subclasses.
      Overrides:
      validate in class StyleElement
      Parameters:
      decl - the declaration to be validated
      Throws:
      XPathException - if any error is found during validation

    • markTailCalls

      public boolean markTailCalls()
      Mark tail-recursive calls on stylesheet functions. For most instructions, this does nothing.
      Overrides:
      markTailCalls in class StyleElement
      Returns:
      true if one or more tail calls were identified

    • compile

      public Expression compile(Executable exec, Declaration decl) throws XPathException
      Description copied from class: StyleElement
      Compile the instruction on the stylesheet tree into an executable instruction for use at run-time.
      Overrides:
      compile in class StyleElement
      Parameters:
      exec - the Executable
      decl - the containing top-level declaration, for example xsl:function or xsl:template
      Returns:
      either a ComputedExpression, or null. The value null is returned when compiling an instruction that returns a no-op, or when compiling a top-level object such as an xsl:template that compiles into something other than an instruction.
      Throws:
      XPathException - if validation fails