org.springframework.roo.shell

Interface Converter<T>

Type Parameters:

T - the type being converted to/from

All Known Subinterfaces:

StaticFieldConverter

All Known Implementing Classes:

AvailableCommandsConverter, StaticFieldConverterImpl

public interface Converter<T>

Converts between Strings (as displayed by and entered via the shell) and Java objects

Author:

Ben Alex

Method Summary

Modifier and Type	Method and Description
T	convertFromText(String value, Class<?> targetType, String optionContext) Converts from the given String value to type T
boolean	getAllPossibleValues(List<Completion> completions, Class<?> targetType, String existingData, String optionContext, MethodTarget target) Populates the given list with the possible completions
boolean	supports(Class<?> type, String optionContext) Indicates whether this converter supports the given type in the given option context

Method Detail

convertFromText

T convertFromText(String value,
                  Class<?> targetType,
                  String optionContext)

Converts from the given String value to type T

Parameters:

value - the value to convert

targetType - the type being converted to; can't be null

optionContext - a non-null string that customises the behaviour of this converter for a given CliOption of a given CliCommand; the contents will have special meaning to this converter (e.g. be a comma-separated list of keywords known to this converter)

Returns:

see above

Throws:

RuntimeException - if the given value could not be converted

getAllPossibleValues

boolean getAllPossibleValues(List<Completion> completions,
                             Class<?> targetType,
                             String existingData,
                             String optionContext,
                             MethodTarget target)

Populates the given list with the possible completions

Parameters:

completions - the list to populate; can't be null

targetType - the type of parameter for which a string is being entered

existingData - what the user has typed so far

optionContext - a non-null string that customises the behaviour of this converter for a given CliOption of a given CliCommand; the contents will have special meaning to this converter (e.g. be a comma-separated list of keywords known to this converter)

target -

Returns:

true if all the added completions are complete values, or false if the user can press TAB to add further information to some or all of them

supports

boolean supports(Class<?> type,
                 String optionContext)

Indicates whether this converter supports the given type in the given option context

Parameters:

type - the type being checked

optionContext - a non-null string that customises the behaviour of this converter for a given CliOption of a given CliCommand; the contents will have special meaning to this converter (e.g. be a comma-separated list of keywords known to this converter)

Returns:

see above