Module org.refcodes.cli
Package org.refcodes.cli

Class AbstractOption<T>

    • Constructor Detail

      • AbstractOption

        public AbstractOption​(String aShortOption,
                      String aLongOption,
                      Class<T> aType,
                      String aAlias,
                      String aDescription)
        Constructs a Option with the given arguments.
        Parameters:
        aShortOption - The short-option being a single character with the additional single hyphen-minus "-" prefix.
        aLongOption - The long-option being a multi-character sequence with at least two characters with the additional double hyphen-minus "--" prefix.
        aType - The type of the value returned by the AbstractOperand.getValue() method.
        aAlias - The option argument's name to be used when constructing the syntax.
        aDescription - A description without any line breaks.

      • AbstractOption

        protected AbstractOption​(String aShortOption,
                         String aLongOption,
                         Class<T> aType,
                         String aDescription)
        Constructs a Option with the given arguments.
        Parameters:
        aShortOption - The short-option being a single character with the additional single hyphen-minus "-" prefix.
        aLongOption - The long-option being a multi-character sequence with at least two characters with the additional double hyphen-minus "--" prefix.
        aType - The type of the value returned by the AbstractOperand.getValue() method.
        aDescription - A description without any line breaks.

      • AbstractOption

        public AbstractOption​(org.refcodes.struct.Relation<String,​T> aProperty,
                      Class<T> aType)
        Instantiates a new option.
        Parameters:
        aProperty - The key (= alias) and the value for the operand.
        aType - the type

    • Method Detail

      • parseArgs

        public List<Operand<T>> parseArgs​(String[] aArgs,
                                  String[] aOptions)
                           throws UnknownArgsException,
                                  AmbiguousArgsException,
                                  ParseArgsException,
                                  SuperfluousArgsException
        Parses the provided command line arguments and determines the according values by evaluating this Syntaxable instance or, in case of being a node in the syntax tree (such as a ArgsSyntax, traversing the child Syntaxable instances' Syntaxable.parseArgs(String[], String[]) methods. In case of successfully parsing this Syntaxable and / or the child Syntaxable instances, the evaluated command line arguments are returned: Depending on the Syntaxable subclasses representing the evaluated command line arguments, instances of Flag classes, Option classes or Operand classes may be found in the result. In case of parsing failure, an according exception is thrown. ATTENTION: This method does not test for superfluous command line arguments being passed; e.g. command line arguments not being evaluated by any of the Syntaxable instance being traversed. This method is commonly used by a root Syntaxable's ArgsParser.evalArgs(String[]) method, which delegates to the Syntaxable.parseArgs(String[], String[]) method and after which it determines whether there are superfluous arguments to be taken care of (by throwing an according exception). Business logic therefore should invoke the root node's Syntaxable.parseArgs(String[], String[]) method as ignoring superfluous command line arguments will cause unexpected behavior from the point of view of the invoker.
        Specified by:
        parseArgs in interface Syntaxable
        Overrides:
        parseArgs in class AbstractOperand<T>
        Parameters:
        aArgs - The command line arguments to be parsed.
        aOptions - The list of options (short and as well as long) which are reserved and cannot be used as value.
        Returns:
        The list of evaluated command line arguments being instances of the Operand interfaces or its sub-types.
        Throws:
        UnknownArgsException - Thrown in case not one command line argument matched regarding the provided args vs. the expected args.
        AmbiguousArgsException - Thrown in case at least one command line argument is ambiguous regarding expected args vs. provided args.
        ParseArgsException - Thrown in case the provided command line arguments do not respect the required syntax or cannot be converted to the required type
        SuperfluousArgsException - in case there were arguments found not being used (superfluous arguments), thrown only in very specific cases (throw with care!).

      • getShortOption

        public String getShortOption()
        Returns the short-option representing an Option instance. A short option usually is being prefixed with a single hyphen-minus "-" as defined in CommandArgPrefix.POSIX_SHORT_OPTION.
        Specified by:
        getShortOption in interface Option<T>
        Returns:
        The short-option String.

      • getLongOption

        public String getLongOption()
        Returns the long-option representing an Option instance. A long option usually is being prefixed with a double hyphen-minus "--" as defined in CommandArgPrefix.POSIX_LONG_OPTION.
        Specified by:
        getLongOption in interface Option<T>
        Returns:
        The long-option String.

      • toSyntax

        public String toSyntax​(SyntaxNotation aSyntaxNotation,
                       String aOptEscCode,
                       String aParamEscCode,
                       String aResetEscCode)
        This method is to be called from inside the Syntaxable hierarchy; use the method Synopsis.toSynopsis(SyntaxNotation) in case you invoke syntax retrieval from the root Syntaxable. Returns the human readable (verbose) syntax of this Syntaxable instance including, in case of being a node in the syntax tree (such as a ArgsSyntax, the syntax of the child Syntaxable instances. ATTENTION: As of different parenthesis settings for some notations regarding the root Syntaxable and the child Syntaxables, the method Syntaxable.toSyntax(SyntaxNotation, String, String, String) is called from inside the Syntaxable hierarchy. In case the syntax is to be retrieved from the root Syntaxable, then the applicable method to be called is Synopsis.toSynopsis(SyntaxNotation), as for some notations it will for example not create the most outer braces.
        Specified by:
        toSyntax in interface Syntaxable
        Overrides:
        toSyntax in class AbstractOperand<T>
        Parameters:
        aSyntaxNotation - The syntax notation used for generating the command line arguments syntax.
        aOptEscCode - The escape code to be used when processing an option, e.g. this can be an ANSI Escape-Code to highlight the option.
        aParamEscCode - The escape code to be used when processing a keyword, e.g. this can be an ANSI Escape-Code to highlight the option and/or parameters.
        aResetEscCode - The escape code to close (reset) any Escape-Code being set before.
        Returns:
        The human readable (verbose) command line arguments syntax.

      • getOptionPrefixes

        protected String[] getOptionPrefixes()
        Determines the prefixes suitable for the environment. Prefixes on Windows might differ from those on POSIX conforming systems.
        Returns:
        The prefixes to used for this runtime.

      • toSynopsis

        public String toSynopsis​(SyntaxNotation aSyntaxNotation,
                         String aOptEscCode,
                         String aParamEscCode,
                         String aResetEscCode)
        Returns the human readable (verbose) syntax of implementing class ATTENTION: As of different parenthesis settings for some notations regarding the root Syntaxable and the child Syntaxables, the method Syntaxable.toSyntax(SyntaxNotation, String, String, String) is called from inside a Syntaxable hierarchy. In case the syntax is to be retrieved from the root Syntaxable or an encapsulating and different type, then the applicable method to be called is Synopsis.toSynopsis(SyntaxNotation), as for some notations it will for example not create the most outer braces.
        Specified by:
        toSynopsis in interface Synopsis
        Parameters:
        aSyntaxNotation - The syntax notation used for generating the command line arguments syntax.
        aOptEscCode - The escape code to be used when processing an option, e.g. this can be an ANSI Escape-Code to highlight the option.
        aParamEscCode - The escape code to be used when processing am argument, e.g. this can be an ANSI Escape-Code to highlight the option.
        aResetEscCode - The escape code to close (reset) any Escape-Code being set before.
        Returns:
        The human readable (verbose) command line arguments syntax.