uk.ac.starlink.task
Class StringParameter

java.lang.Object
  extended by uk.ac.starlink.task.Parameter<String>
      extended by uk.ac.starlink.task.StringParameter
Direct Known Subclasses:
InputFormatParameter, OutputFormatParameter, SkyCoordParameter

public class StringParameter
extends Parameter<String>

Parameter for holding string values.

Since:
20 Aug 2014
Author:
Mark Taylor

Field Summary
 
Fields inherited from class uk.ac.starlink.task.Parameter
BY_NAME
 
Constructor Summary
StringParameter(String name)
          Constructor.
 
Method Summary
 String stringToObject(Environment env, String sval)
          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

StringParameter

public StringParameter(String name)
Constructor.

Parameters:
name - parameter name
Method Detail

stringToObject

public String stringToObject(Environment env,
                             String sval)
                      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<String>
Parameters:
env - execution environment; in most cases this is not required but for some purposes environment-specific characteristics may influence the result
sval - non-null, non-empty string value
Returns:
typed value
Throws:
TaskException


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