Module org.refcodes.cli

Package org.refcodes.cli

Class Operation

java.lang.Object

org.refcodes.cli.AbstractOperand<Boolean>

org.refcodes.cli.Operation

All Implemented Interfaces:

Cloneable, Comparable<Boolean>, ArgsAccessor, Operand<Boolean>, Syntaxable, SyntaxUsage, org.refcodes.component.Resetable, org.refcodes.mixin.AliasAccessor, org.refcodes.mixin.Clonable, org.refcodes.mixin.DescriptionAccessor, org.refcodes.mixin.EnabledAccessor, org.refcodes.mixin.TypeAccessor<Boolean>, org.refcodes.mixin.ValueAccessor<Boolean>

public class Operation
extends AbstractOperand<Boolean>
implements org.refcodes.mixin.EnabledAccessor

The Operation is an argument representing a function or a method and is either provided or not provided as of isEnabled(). It must neither be prefixed with "-" nor with "--" in contrast to the Option or the Flag type.

Nested Class Summary

Nested classes/interfaces inherited from interface org.refcodes.mixin.AliasAccessor

org.refcodes.mixin.AliasAccessor.AliasBuilder<B extends org.refcodes.mixin.AliasAccessor.AliasBuilder<B>>, org.refcodes.mixin.AliasAccessor.AliasMutator, org.refcodes.mixin.AliasAccessor.AliasProperty

Nested classes/interfaces inherited from interface org.refcodes.cli.ArgsAccessor

ArgsAccessor.ArgsMutator, ArgsAccessor.ArgsProperty

Nested classes/interfaces inherited from interface org.refcodes.mixin.DescriptionAccessor

org.refcodes.mixin.DescriptionAccessor.DescriptionBuilder<B extends org.refcodes.mixin.DescriptionAccessor.DescriptionBuilder<B>>, org.refcodes.mixin.DescriptionAccessor.DescriptionMutator, org.refcodes.mixin.DescriptionAccessor.DescriptionProperty

Nested classes/interfaces inherited from interface org.refcodes.mixin.EnabledAccessor

org.refcodes.mixin.EnabledAccessor.EnabledBuilder<B extends org.refcodes.mixin.EnabledAccessor.EnabledBuilder<B>>, org.refcodes.mixin.EnabledAccessor.EnabledMutator, org.refcodes.mixin.EnabledAccessor.EnabledProperty

Nested classes/interfaces inherited from interface org.refcodes.mixin.TypeAccessor

org.refcodes.mixin.TypeAccessor.TypeBuilder<T extends Object,B extends org.refcodes.mixin.TypeAccessor.TypeBuilder<T,B>>, org.refcodes.mixin.TypeAccessor.TypeMutator<T extends Object>, org.refcodes.mixin.TypeAccessor.TypeProperty<T extends Object>

Nested classes/interfaces inherited from interface org.refcodes.mixin.ValueAccessor

org.refcodes.mixin.ValueAccessor.ValueBuilder<V extends Object,B extends org.refcodes.mixin.ValueAccessor.ValueBuilder<V,B>>, org.refcodes.mixin.ValueAccessor.ValueMutator<V extends Object>, org.refcodes.mixin.ValueAccessor.ValueProperty<V extends Object>

Field Summary

Fields inherited from class org.refcodes.cli.AbstractOperand

_value

Constructor Summary

Constructors

Constructor	Description
Operation(String aOperation, String aDescription)	Constructs a Operation with the given arguments.
Operation(String aOperation, String aAlias, String aDescription)	Constructs a Operation with the given arguments.

Method Summary

Modifier and Type	Method	Description
Object	clone()
String	getOperation()	Returns the operation's name.
boolean	isEnabled()	Returns true if the switch has been set (enabled).
List<Operand<Boolean>>	parseArgs(String[] aArgs, String[] aOptions)	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 Condition, traversing the child Syntaxable instances' Syntaxable.parseArgs(String[], String[]) methods.
String	toState()	The Syntaxable.toState() method might be used by the Object.toString() method and prints out the state of the syntaxable and (if any) its children.
String	toSyntax(SyntaxNotation aSyntaxNotation, String aOptionEscCode, String aResetEscCode)	This method is to be called from inside the Syntaxable hierarchy; use the method SyntaxUsage.toUsage(SyntaxNotation) in case you invoke syntax retrieval from the root Syntaxable.
String	toUsage(SyntaxNotation aSyntaxNotation, String aOptionEscCode, 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) is called from inside a Syntaxable hierarchy.
protected Boolean	toValue(String aArg)	Double dispatch hook to be implemented by subclasses of the AbstractOperand for converting a command line argument to the required Operand's type.

Methods inherited from class org.refcodes.cli.AbstractOperand

compareTo, getAlias, getArgs, getDescription, getType, getValue, reset, setArgs, setValue, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.refcodes.cli.Operand

get, hasValue

Methods inherited from interface org.refcodes.cli.Syntaxable

parseArgs, toSyntax

Methods inherited from interface org.refcodes.cli.SyntaxUsage

toUsage, toUsage, toUsage

Methods inherited from interface org.refcodes.mixin.ValueAccessor

getValueOr

Constructor Detail

Operation

public Operation(String aOperation,
                 String aAlias,
                 String aDescription)

Constructs a Operation with the given arguments.

Parameters:

aOperation - The operation to declare.

aAlias - The operation's name to be used when constructing the syntax.

aDescription - A description without any line breaks.

Operation

public Operation(String aOperation,
                 String aDescription)

Constructs a Operation with the given arguments.

Parameters:

aOperation - The operation to declare.

aDescription - A description without any line breaks.

Method Detail

parseArgs

public List<Operand<Boolean>> parseArgs(String[] aArgs,
                                        String[] aOptions)
                                 throws UnknownArgsException,
                                        AmbiguousArgsException,
                                        ParseArgsException

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 Condition, 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<Boolean>

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

getOperation

public String getOperation()

Returns the operation's name.

Returns:

The according operation's name.

toSyntax

public String toSyntax(SyntaxNotation aSyntaxNotation,
                       String aOptionEscCode,
                       String aResetEscCode)

This method is to be called from inside the Syntaxable hierarchy; use the method SyntaxUsage.toUsage(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 Condition, 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) 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 SyntaxUsage.toUsage(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<Boolean>

Parameters:

aSyntaxNotation - The syntax notation used for generating the command line arguments syntax.

aOptionEscCode - The escape code to be used when processing an option, e.g. this can be an ANSI Escape-Code to highlight the option parameters.

aResetEscCode - The escape code to close (reset) any Escape-Code being set before.

Returns:

The human readable (verbose) command line arguments syntax.

toState

public String toState()

The Syntaxable.toState() method might be used by the Object.toString() method and prints out the state of the syntaxable and (if any) its children. Even in case parsing command line arguments failed, the state till failure can be inspected with this method.

Specified by:

toState in interface Syntaxable

Overrides:

toState in class AbstractOperand<Boolean>

Returns:

The state of this Syntaxable instance and (if any) its children.

clone

public Object clone()
             throws CloneNotSupportedException

Specified by:

clone in interface org.refcodes.mixin.Clonable

Overrides:

clone in class AbstractOperand<Boolean>

Throws:

CloneNotSupportedException

isEnabled

public boolean isEnabled()

Returns true if the switch has been set (enabled).

Specified by:

isEnabled in interface org.refcodes.mixin.EnabledAccessor

Returns:

True in case the Flag has been provided (set), else false.

toValue

protected Boolean toValue(String aArg)
                   throws ParseArgsException

Double dispatch hook to be implemented by subclasses of the AbstractOperand for converting a command line argument to the required Operand's type. In case conversion failed, then an according exception is to be thrown.

Specified by:

toValue in class AbstractOperand<Boolean>

Parameters:

aArg - The command line argument to be converted to an instance of the given type T.

Returns:

An instance of type T from the provided command line argument.

Throws:

ParseArgsException - Thrown in case the provided command line arguments do not respect the required syntax or cannot be converted to the required type.

toUsage

public String toUsage(SyntaxNotation aSyntaxNotation,
                      String aOptionEscCode,
                      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) 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 SyntaxUsage.toUsage(SyntaxNotation), as for some notations it will for example not create the most outer braces.

Specified by:

toUsage in interface SyntaxUsage

Parameters:

aSyntaxNotation - The syntax notation used for generating the command line arguments syntax.

aOptionEscCode - The escape code to be used when processing an option, e.g. this can be an ANSI Escape-Code to highlight the option parameters (for example "--help", "-q" and so on).

aResetEscCode - The escape code to close (reset) any Escape-Code being set before.

Returns:

The human readable (verbose) command line arguments syntax.