Class ArgsParserImpl

  • All Implemented Interfaces:
    org.refcodes.component.Resetable, ArgsParser, ArgsParserMixin<ArgsParser>, RootConditionAccessor, org.refcodes.mixin.DescriptionAccessor.DescriptionBuilder<ArgsParser>, org.refcodes.mixin.DescriptionAccessor.DescriptionMutator, org.refcodes.mixin.NameAccessor.NameBuilder<ArgsParser>, org.refcodes.mixin.NameAccessor.NameMutator, org.refcodes.mixin.TitleAccessor.TitleBuilder<ArgsParser>, org.refcodes.mixin.TitleAccessor.TitleMutator

    public class ArgsParserImpl
    extends java.lang.Object
    implements ArgsParser
    A straightforward implementation of the ArgsParser interface. The constructor only provides means to set the required attributes as the attributes to be adjusted optionally are already sufficiently pre-configured. For adjusting them, a flavor of the Builder-Pattern is provided with which you can easily chain the configuration of this instance; as them methods return the instance of this class being configured. This helps to prevent the telescoping constructor anti-pattern.

    The SyntaxNotation is pre-set with the SyntaxNotation.REFCODES notation.

    The console width id pre-configured with the console's width as determined by the SystemUtility.getTerminalWidth().

    The standard out PrintStream is pre-configured with the System.out PrintStream.

    The newline characters to be used for line breaks is "\r\n" on Windows machines and "\"n" on all other machines as of the SystemUtility.getLineBreak().

    See Also:
    "http://en.wikipedia.org/wiki/Builder_pattern"
    • Constructor Detail

      • ArgsParserImpl

        public ArgsParserImpl​(Condition aRootCondition)
        Constructs the ArgsParser instance with the given root Condition and the default SyntaxNotation.REFCODES. The constructor only provides means to set the required attributes as the attributes to be adjusted optionally are already sufficiently pre-configured. For adjusting them, a flavor of the Builder-Pattern is provided with which you can easily chain the configuration of this instance; as them methods return the instance of this class being configured.
        Parameters:
        aRootCondition - The root condition being the node from which parsing the command line arguments starts.
      • ArgsParserImpl

        public ArgsParserImpl()
        Constructs the ArgsParser instance without any restrictions to the parsed arguments. The constructor only provides means to set the required attributes as the attributes to be adjusted optionally are already sufficiently pre-configured. For adjusting them, a flavor of the Builder-Pattern is provided with which you can easily chain the configuration of this instance; as them methods return the instance of this class being configured.
    • Method Detail

      • setStandardOut

        public void setStandardOut​(java.io.PrintStream aStandardOut)
        Set the standard out PrintStream and make other adjustments with the result (with regards to the Builder-Pattern).
        Specified by:
        setStandardOut in interface ArgsParser
        Parameters:
        aStandardOut - The standard out PrintStream to set.
      • setErrorOut

        public void setErrorOut​(java.io.PrintStream aErrorOut)
        Set the error out PrintStream and make other adjustments with the result (with regards to the Builder-Pattern).
        Specified by:
        setErrorOut in interface ArgsParser
        Parameters:
        aErrorOut - The error out PrintStream to set.
      • setConsoleWidth

        public void setConsoleWidth​(int aConsoleWidth)
        Set the console with. A setting of "-1" makes the instance use the SystemUtility.getTerminalWidth() value, i.e. the console width is set automatically to be the width of your terminal.
        Specified by:
        setConsoleWidth in interface ArgsParser
        Parameters:
        aConsoleWidth - The width to set or -1 to let the parser automatically determine the console width.
      • setLineBreak

        public void setLineBreak​(java.lang.String aLineBreak)
        Set the console's line break. A setting of null makes the instance use the SystemUtility.getLineBreak() value.
        Specified by:
        setLineBreak in interface ArgsParser
        Parameters:
        aLineBreak - the new line break
      • setDescription

        public void setDescription​(java.lang.String aDescription)
        Specified by:
        setDescription in interface org.refcodes.mixin.DescriptionAccessor.DescriptionMutator
      • setName

        public void setName​(java.lang.String aName)
        Specified by:
        setName in interface org.refcodes.mixin.NameAccessor.NameMutator
      • setCopyrightNote

        public void setCopyrightNote​(java.lang.String aCopyrightNote)
        Set the copyright note used by the ArgsParser.printHelp() method when writing out the copyright claim and make other adjustments with the result (with regards to the Builder-Pattern).
        Specified by:
        setCopyrightNote in interface ArgsParser
        Parameters:
        aCopyrightNote - The license note printed out by the ArgsParser.printHelp() method.
      • setBannerFont

        public void setBannerFont​(org.refcodes.textual.Font aBannerFont)
        Sets the banner font.
        Specified by:
        setBannerFont in interface ArgsParser
        Parameters:
        aBannerFont - the new banner font
      • setBannerFontPalette

        public void setBannerFontPalette​(char[] aColorPalette)
        Sets the banner font palette.
        Specified by:
        setBannerFontPalette in interface ArgsParser
        Parameters:
        aColorPalette - the new banner font palette
      • setTitle

        public void setTitle​(java.lang.String aTitle)
        Specified by:
        setTitle in interface org.refcodes.mixin.TitleAccessor.TitleMutator
      • setMaxConsoleWidth

        public void setMaxConsoleWidth​(int aMaxConsoleWidth)
        Set the maximum console width to use in case the console width is greater than the maximum you want. This is most useful when the console width is determined automatically to be the width of your terminal.
        Specified by:
        setMaxConsoleWidth in interface ArgsParser
        Parameters:
        aMaxConsoleWidth - the new max console width
      • evalArgs

        public java.util.List<? extends Operand<?>> evalArgs​(java.lang.String[] aArgs)
                                                      throws UnknownArgsException,
                                                             AmbiguousArgsException,
                                                             SuperfluousArgsException,
                                                             ParseArgsException
        Evaluates the provided command line arguments and determines the according values by evaluating the root Condition. In case of parsing failure, an according exception is thrown. ATTENTION: This method tests(!) for superfluous command line arguments being passed; e.g. command line arguments not being evaluated by any of the Syntaxable instance being traversed starting at the root Condition will be reported. Business logic therefore should invoke this root node's ArgsParser.evalArgs(String[]) method instead of a Condition's Syntaxable.parseArgs(String[]) method; as ignoring superfluous command line arguments will cause unexpected behavior from the point of view of the invoker.
        Specified by:
        evalArgs in interface ArgsParser
        Parameters:
        aArgs - The command line arguments to be evaluated.
        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.
        SuperfluousArgsException - Thrown in case there were arguments found not being used (superfluous arguments).
        ParseArgsException - Thrown in case the provided command line arguments do not respect the required syntax or cannot be converted to the required type
      • printLn

        public void printLn​(java.lang.String aLine)
        Prints the given line to standard out with regards to to the console width as specified by the ArgsParser.withConsoleWidth(int) method.
        Specified by:
        printLn in interface ArgsParser
        Parameters:
        aLine - The line to be printed.
      • errorLn

        public void errorLn​(java.lang.String aLine)
        Prints the given line to standard error with regards to to the console width as specified by the ArgsParser.withConsoleWidth(int) method.
        Specified by:
        errorLn in interface ArgsParser
        Parameters:
        aLine - The line to be printed.
      • printLn

        public void printLn()
        Prints an empty line / a line break.
        Specified by:
        printLn in interface ArgsParser
      • printBanner

        public void printBanner()
        Prints the banner; the banner most probably is an ASCII art text block which's look depends strongly on the taste of the author implementing this interface.
        Specified by:
        printBanner in interface ArgsParser
      • getRootCondition

        public Condition getRootCondition()
        The root condition is the starting point node of a Syntaxable hierarchy to be traversed when determining the syntax for command line arguments or when evaluating the command line arguments. Retrieves the rootCondition from the rootCondition property.
        Specified by:
        getRootCondition in interface ArgsParser
        Specified by:
        getRootCondition in interface RootConditionAccessor
        Returns:
        The root Condition in which's syntax this parser is based.
      • reset

        public void reset()
        Specified by:
        reset in interface org.refcodes.component.Resetable
      • getDelimiter

        protected char getDelimiter()
        Returns the delimiter to be used by colliding command line args when creating non colliding arg's aliases (keys for key/value-pairs).
        Returns:
        The according delimiter.
      • fromArgs

        protected static java.util.List<? extends Operand<?>> fromArgs​(java.lang.String[] aArgs,
                                                                       char aDelimiter)
        Heuristically loads the arguments without any syntax required, e.g. without any root Condition to be set.
        Parameters:
        aArgs - The arguments to be loaded.
        aDelimiter - The delimiter to resolve name clashes.
        Returns:
        A list of heuristically determined Switch and StringOperandImpl instances.