uk.ac.starlink.ttools.cone
Class ConeErrorPolicyParameter

java.lang.Object
  extended by uk.ac.starlink.task.Parameter<ConeErrorPolicy>
      extended by uk.ac.starlink.ttools.cone.ConeErrorPolicyParameter

public class ConeErrorPolicyParameter
extends Parameter<ConeErrorPolicy>

Parameter for selecting ConeErrorPolicy objects.

Since:
24 Jan 2008
Author:
Mark Taylor

Field Summary
 
Fields inherited from class uk.ac.starlink.task.Parameter
BY_NAME
 
Constructor Summary
ConeErrorPolicyParameter(String name)
          Constructor.
 
Method Summary
 ConeErrorPolicy policyValue(Environment env)
          Returns the value of this parameter as a ConeErrorPolicy.
 ConeErrorPolicy stringToObject(Environment env, String stringVal)
          Takes a non-blank string, as supplied by the execution environment, and turns it into a typed value for this parameter.
 
Methods inherited from class uk.ac.starlink.task.Parameter
clearValue, getDescription, getName, getPosition, getPreferExplicit, getPrompt, getStringDefault, getUsage, getValueClass, isNullPermitted, objectToString, objectValue, setDescription, setDescription, setName, setNullPermitted, setPosition, setPreferExplicit, setPrompt, setStringDefault, setUsage, setValue, setValueFromObject, setValueFromString, stringValue, toArray, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ConeErrorPolicyParameter

public ConeErrorPolicyParameter(String name)
Constructor.

Parameters:
name - parameter name
Method Detail

policyValue

public ConeErrorPolicy policyValue(Environment env)
                            throws TaskException
Returns the value of this parameter as a ConeErrorPolicy.

Parameters:
env - execution environment
Returns:
error policy value
Throws:
TaskException

stringToObject

public ConeErrorPolicy stringToObject(Environment env,
                                      String stringVal)
                               throws TaskException
Description copied from class: Parameter
Takes a non-blank string, as supplied by the execution environment, and turns it into a typed value for this parameter. This method also performs validation, so if the string value is unacceptable in any way, a ParameterValueException should be thrown.

It is an error to supply a null or empty string value.

If this method fails (throws a ParameterValueException) and if allowClassnameValue is set, then a subsequent attempt will be made to interpret the stringVal as the classname of a suitable class with a no-arg constructor.

Specified by:
stringToObject in class Parameter<ConeErrorPolicy>
Parameters:
env - execution environment; in most cases this is not required but for some purposes environment-specific characteristics may influence the result
stringVal - non-null, non-empty string value
Returns:
typed value
Throws:
TaskException


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