uk.ac.starlink.task

Class OutputStreamParameter

java.lang.Object

uk.ac.starlink.task.Parameter<Destination>

uk.ac.starlink.task.OutputStreamParameter

public class OutputStreamParameter
extends Parameter<Destination>

Parameter for selecting an output stream to write to.

Since:

9 May 2006

Author:

Mark Taylor

Field Summary

Fields inherited from class uk.ac.starlink.task.Parameter

BY_NAME

Constructor Summary

Constructors

Constructor and Description
OutputStreamParameter(String name) Constructor.

Method Summary

Modifier and Type	Method and Description
Destination	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

OutputStreamParameter

public OutputStreamParameter(String name)

Constructor.

Parameters:

name - parameter name

Method Detail

stringToObject

public Destination stringToObject(Environment env,
                                  String sval)
                           throws ParameterValueException

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<Destination>

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:

ParameterValueException