picocli

Class CommandLine.UseDefaultConverter

java.lang.Object

picocli.CommandLine.UseDefaultConverter

All Implemented Interfaces:

CommandLine.ITypeConverter<Object>

Enclosing class:

CommandLine

public static final class CommandLine.UseDefaultConverter
extends Object
implements CommandLine.ITypeConverter<Object>

Converter that can be used to signal to picocli that it should use the default converter. This can be useful with maps:

   class App {
       @Option(names = "-D", converter = {UseDefaultConverter.class, GenericValueConverter.class})
       Map<String, GenericValue<?>> values;
  }
 

The convert(String) method of this class always throws an UnsupportedOperationException.

Since:

4.7.6

Constructor Summary

Constructors

Constructor and Description
UseDefaultConverter()

Method Summary

Modifier and Type	Method and Description
Object	convert(String value) Always throws UnsupportedOperationException.

Methods inherited from class java.lang.Object

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

Constructor Detail

UseDefaultConverter

public UseDefaultConverter()

Method Detail

convert

public Object convert(String value)
               throws Exception

Always throws UnsupportedOperationException.

Specified by:

convert in interface CommandLine.ITypeConverter<Object>

Parameters:

value - the command line argument String value

Returns:

the resulting domain object

Throws:

UnsupportedOperationException - always

Exception - an exception detailing what went wrong during the conversion. Any exception thrown from this method will be caught and shown to the end user. An example error message shown to the end user could look something like this: Invalid value for option '--some-option': cannot convert 'xxxinvalidinput' to SomeType (java.lang.IllegalArgumentException: Invalid format: must be 'x:y:z' but was 'xxxinvalidinput')

CommandLine.TypeConversionException - throw this exception to have more control over the error message that is shown to the end user when type conversion fails. An example message shown to the user could look like this: Invalid value for option '--some-option': Invalid format: must be 'x:y:z' but was 'xxxinvalidinput'