net.sf.saxon.expr.instruct

Class GlobalParameterSet

java.lang.Object

net.sf.saxon.expr.instruct.GlobalParameterSet

public class GlobalParameterSet
extends Object

A GlobalParameterSet is a set of parameters supplied when invoking a stylesheet or query. It is a collection of name-value pairs, the names being represented by StructuredQName objects. The values are objects, as supplied by the caller: conversion of the object to a required type takes place when the parameter is actually used.

Constructor Summary

Constructors

Constructor and Description
GlobalParameterSet() Create an empty parameter set

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clear all values
boolean	containsKey(StructuredQName qName)
Sequence	convertParameterValue(StructuredQName qName, SequenceType requiredType, boolean convert, XPathContext context) Get the value of a parameter, converted to a Sequence object
Object	get(StructuredQName qName) Get a parameter
Collection<StructuredQName>	getKeys() Get all the keys that have been allocated
int	getNumberOfKeys() Get the number of entries in the result of getKeys() that are significant
void	put(StructuredQName qName, Object value) Add a parameter to the ParameterSet

Methods inherited from class java.lang.Object

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

Constructor Detail

GlobalParameterSet

public GlobalParameterSet()

Create an empty parameter set

Method Detail

put

public void put(StructuredQName qName,
       Object value)

Add a parameter to the ParameterSet

Parameters:

qName - The fingerprint of the parameter name.

value - The value of the parameter, or null if the parameter is to be removed

get

public Object get(StructuredQName qName)

Get a parameter

Parameters:

qName - The parameter name.

Returns:

The value of the parameter, or null if not defined

containsKey

public boolean containsKey(StructuredQName qName)

convertParameterValue

public Sequence convertParameterValue(StructuredQName qName,
                             SequenceType requiredType,
                             boolean convert,
                             XPathContext context)
                               throws XPathException

Get the value of a parameter, converted to a Sequence object

Parameters:

qName - the name of the parameter

requiredType - the required type of the parameter

convert - set to true if function conversion rules are to be applied, or to false if the value is simply to be checked against the required type

context - dynamic evaluation context

Returns:

the value after conversion and type checking; or null if there is no value for this parameter

Throws:

XPathException - if the value is of the wrong type

clear

public void clear()

Clear all values

getKeys

public Collection<StructuredQName> getKeys()

Get all the keys that have been allocated

Returns:

the names of the parameter keys (QNames)

getNumberOfKeys

public int getNumberOfKeys()

Get the number of entries in the result of getKeys() that are significant

Returns:

the number of entries