: Class StringFn

com.icl.saxon.functions
Class StringFn

java.lang.Object

  |

  +--com.icl.saxon.expr.Expression

        |

        +--com.icl.saxon.expr.Function

              |

              +--com.icl.saxon.functions.StringFn

public class StringFn

extends Function

Fields inherited from class com.icl.saxon.expr.Function

argument

Fields inherited from class com.icl.saxon.expr.Expression

staticContext

Constructor Summary

StringFn()

Method Summary

Value	evaluate(Context c) Evaluate in a general context
java.lang.String	evaluateAsString(Context c) Evaluate the function in a string context
int	getDataType() Determine the data type of the expression
int	getDependencies() Determine the dependencies
java.lang.String	getName() Function name (for diagnostics)
Expression	reduce(int dep, Context c) Reduce the dependencies
Expression	simplify() Simplify and validate.

Methods inherited from class com.icl.saxon.expr.Function

addArgument, checkArgumentCount, display, getNumberOfArguments

Methods inherited from class com.icl.saxon.expr.Expression

containsReferences, enumerate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsNumber, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, setStaticContext, usesCurrent

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StringFn

public StringFn()

Method Detail

getName

public java.lang.String getName()

Function name (for diagnostics)

Overrides:

getName in class Function

Following copied from class: com.icl.saxon.expr.Function

Returns:

the name of the function, as used in XSL expressions, but excluding its namespace prefix

getDataType

public int getDataType()

Determine the data type of the expression

Overrides:

getDataType in class Expression

Returns:

Value.STRING

simplify

public Expression simplify()
                    throws XPathException

Simplify and validate. This is a pure function so it can be simplified in advance if the arguments are known

Overrides:

simplify in class Expression

Following copied from class: com.icl.saxon.expr.Expression

Returns:

the simplified expression

evaluateAsString

public java.lang.String evaluateAsString(Context c)
                                  throws XPathException

Evaluate the function in a string context

Overrides:

evaluateAsString in class Expression

Following copied from class: com.icl.saxon.expr.Expression

Parameters:

context - The context in which the expression is to be evaluated

Returns:

the value of the expression, evaluated in the current context

evaluate

public Value evaluate(Context c)
               throws XPathException

Evaluate in a general context

Overrides:

evaluate in class Expression

Following copied from class: com.icl.saxon.expr.Expression

Parameters:

context - The context in which the expression is to be evaluated

Returns:

the value of the expression, evaluated in the current context

getDependencies

public int getDependencies()

Determine the dependencies

Overrides:

getDependencies in class Expression

reduce

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

Reduce the dependencies

Overrides:

reduce in class Expression

Following copied from class: com.icl.saxon.expr.Expression

Parameters:

dependencies - The dependencies to be removed, e.g. Context.VARIABLES

context - The context to be used for the partial evaluation

Returns:

a new expression (or Value) that does not have any of the specified dependencies