issrg.pba.rbac.xmlpolicy.ifstatement
Class Types

java.lang.Object
  issrg.pba.rbac.xmlpolicy.ifstatement.Types

public final class Types
extends java.lang.Object

This class maintains a registry of known types, so that the string encoding of the values of these types can be decoded from the XML Policy. When registering the type, the impelementing class should have a constructor with a single String parameter to it.

By default there are three types known: BOOLEAN_TYPE, INTEGER_TYPE and STRING_TYPE ("Boolean", "Integer" and "String" respectively).

Author:

A.Otenko

Field Summary

static java.lang.String	BOOLEAN_TYPE
static java.lang.String	DOUBLE_TYPE
static java.lang.String	INTEGER_TYPE
protected static java.util.Map	knownTypes
static java.lang.String	STRING_TYPE

Constructor Summary

Types()

Method Summary

static java.lang.Object	construct(java.lang.String type, java.lang.String value) This is the method for building the objects of known types out of their String encoding.
static void	registerType(java.lang.String type, java.lang.Class c) This method registers a class to be used to instantiate values of the given type from String encoding.

Methods inherited from class java.lang.Object

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

Field Detail

knownTypes

protected static final java.util.Map knownTypes

INTEGER_TYPE

public static final java.lang.String INTEGER_TYPE

See Also:

Constant Field Values

DOUBLE_TYPE

public static final java.lang.String DOUBLE_TYPE

See Also:

Constant Field Values

BOOLEAN_TYPE

public static final java.lang.String BOOLEAN_TYPE

See Also:

Constant Field Values

STRING_TYPE

public static final java.lang.String STRING_TYPE

See Also:

Constant Field Values

Constructor Detail

Types

public Types()

Method Detail

registerType

public static void registerType(java.lang.String type,
                                java.lang.Class c)

This method registers a class to be used to instantiate values of the given type from String encoding.

Parameters:

type - - the type of the value

c - - the Class that represents the values of that type; it must have a public constructor with a single String argument

construct

public static java.lang.Object construct(java.lang.String type,
                                         java.lang.String value)
                                  throws EvaluationException

This is the method for building the objects of known types out of their String encoding.

Parameters:

type - is the type of the object, as it appears in the XML Policy

value - is the String encoding of the object

Returns:

the constructed type-specific Object

Throws:

EvaluationException - if the constructor is not found or the value is not properly encoded