uk.ac.starlink.ttools.task
Class TableFactoryParameter
java.lang.Object
uk.ac.starlink.task.Parameter<StarTableFactory>
uk.ac.starlink.ttools.task.TableFactoryParameter
public class TableFactoryParameter
- extends Parameter<StarTableFactory>
Parameter whose value is a StarTableFactory.
- Author:
- Mark Taylor
Method Summary |
static StarTableFactory |
createTableFactory(String sval)
Decodes a string value which represents a particular
prescription for resolving table names to table data,
returning a functioning StarTableFactory object which
embodies this behaviour. |
StarTableFactory |
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 |
TableFactoryParameter
public TableFactoryParameter(String name)
- Constructor.
- Parameters:
name
- parameter name
stringToObject
public StarTableFactory 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<StarTableFactory>
- Parameters:
env
- execution environment; in most cases this is not required
but for some purposes environment-specific characteristics
may influence the resultsval
- non-null, non-empty string value
- Returns:
- typed value
- Throws:
TaskException
createTableFactory
public static StarTableFactory createTableFactory(String sval)
throws UsageException
- Decodes a string value which represents a particular
prescription for resolving table names to table data,
returning a functioning StarTableFactory object which
embodies this behaviour.
- Parameters:
sval
- string representation of behaviour
- Returns:
- table factory
- Throws:
UsageException
- if the string value cannot be decoded
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