Class Document

public Value evaluate(Context c)
            throws XPathException

evaluate() handles evaluation of the function

Overrides:

evaluate in interface Expression

public int getDataType()

Determine the data type of the expression

Overrides:

getDataType in interface Expression

Returns:

Value.NODESET

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

Overrides:

getDependencies in interface Expression

public NodeSetValue getDocuments(Value arg0,
                                 NodeSetValue arg1,
                                 String styleSheetURL,
                                 Context context)
            throws XPathException

getDocuments() evaluates the function.

Parameters:

arg0 - The value of the first argument

arg1 - The value of the second argument, if there is one; otherwise null

styleSheetURL - The URI of the node in the stylesheet containing the expression. Needed only when the first argument is not a nodeset and the second argument is omitted.

context - The evaluation context

Returns:

a NodeSetValue containing the root nodes of the selected documents (or element nodes if the URI references contain fragment identifiers)

public String getName()

Overrides:

getName in interface Function

public Expression reduce(int dep,
                         Context context)
            throws XPathException

Remove dependencies.

Overrides:

reduce in interface Expression

public Expression simplify()
            throws XPathException

Simplify and validate.

Overrides:

simplify in interface Expression