com.icl.saxon.expr
Class AttributeReference
(package private) class AttributeReference
An expression that represents a reference to a named attribute
containsReferences , display , enumerate , evaluate , evaluateAsBoolean , evaluateAsNodeSet , evaluateAsNumber , evaluateAsString , getDataType , getDependencies , getStaticContext , indent , isContextDocumentNodeSet , make , outputStringValue , reduce , setStaticContext , simplify , usesCurrent |
AttributeReference
public AttributeReference(int fingerprint)
Constructor
bindParentNode
public void bindParentNode(NodeInfo node)
Bind the reference to a particular node
display
public void display(int level)
Diagnostic print of expression structure
- display in interface Expression
evaluateAsBoolean
public boolean evaluateAsBoolean(Context context)
throws XPathException
Evaluate as a boolean. Returns true if there are any nodes
selected by the NodeSetExpression
- evaluateAsBoolean in interface SingletonExpression
context
- The context in which the expression is to be evaluated
- true if there are any nodes selected by the NodeSetExpression
evaluateAsString
public String evaluateAsString(Context context)
throws XPathException
Evaluate as a string. Returns the string value of the attribute if it exists
- evaluateAsString in interface SingletonExpression
context
- The context in which the expression is to be evaluated
- true if there are any nodes selected by the NodeSetExpression
getDependencies
public int getDependencies()
Determine which aspects of the context the expression depends on. The result is
a bitwise-or'ed value composed from constants such as Context.VARIABLES and
Context.CURRENT_NODE
- getDependencies in interface Expression
reduce
public Expression reduce(int dependencies,
Context context)
throws XPathException
Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
- reduce in interface Expression
dependencies
- The dependencies to be removedcontext
- The context to be used for the partial evaluation
- a new expression that does not have any of the specified
dependencies