net.fortuna.ical4j.util

Class ParameterValidator

java.lang.Object

net.fortuna.ical4j.util.ParameterValidator

public final class ParameterValidator
extends java.lang.Object

$Id$ [15-May-2004] Defines methods for validating parameters and parameter lists.

Author:

Ben Fortuna

Method Summary

Methods

Modifier and Type	Method and Description
void	assertNone(java.lang.String paramName, ParameterList parameters) Ensure a parameter doesn't occur in the specified list.
void	assertNullOrEqual(Parameter param, ParameterList parameters)
void	assertOne(java.lang.String paramName, ParameterList parameters) Ensure a parameter occurs once.
void	assertOneOrLess(java.lang.String paramName, ParameterList parameters) Ensure a parameter occurs no more than once.
static ParameterValidator	getInstance()

Methods inherited from class java.lang.Object

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

Method Detail

assertOneOrLess

public void assertOneOrLess(java.lang.String paramName,
                   ParameterList parameters)
                     throws ValidationException

Ensure a parameter occurs no more than once.

Parameters:

paramName - the parameter name

parameters - a list of parameters to query

Throws:

ValidationException - when the specified parameter occurs more than once

assertOne

public void assertOne(java.lang.String paramName,
             ParameterList parameters)
               throws ValidationException

Ensure a parameter occurs once.

Parameters:

paramName - the parameter name

parameters - a list of parameters to query

Throws:

ValidationException - when the specified parameter does not occur once

assertNone

public void assertNone(java.lang.String paramName,
              ParameterList parameters)
                throws ValidationException

Ensure a parameter doesn't occur in the specified list.

Parameters:

paramName - the name of a parameter

parameters - a list of parameters

Throws:

ValidationException - thrown when the specified property is found in the list of properties

assertNullOrEqual

public void assertNullOrEqual(Parameter param,
                     ParameterList parameters)
                       throws ValidationException

Parameters:

param - a parameter instance

parameters - a list of parameters

Throws:

ValidationException - where the assertion fails

getInstance

public static ParameterValidator getInstance()

Returns:

Returns the instance.