Module org.refcodes.cli

Package org.refcodes.cli

Class XorCondition

java.lang.Object

org.refcodes.cli.AbstractCondition

org.refcodes.cli.XorCondition

All Implemented Interfaces:

Condition, Syntaxable, SyntaxUsage, org.refcodes.component.Resetable

public class XorCondition
extends AbstractCondition
implements Condition

An XorCondition represents a list of Condition (Syntaxable) instances of which only one is allowed to be parsed successfully when the Syntaxable.parseArgs(String[], String[]) methods are invoked. The command line arguments syntax { -a ^ -b ^ -c } specifies that only "-a", only "-b" or only "-c" must be set. In case more then one is set or none, then the XorCondition will terminate the parseArgs(String[], String[]) method with an exception.

Constructor Summary

Constructors

Constructor	Description
XorCondition(Syntaxable... aArgs)	Instantiates a new XorCondition with the Syntaxable (Condition) instances to be nested.

Method Summary

Modifier and Type	Method	Description
List<? extends Operand<?>>	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.

Methods inherited from class org.refcodes.cli.AbstractCondition

addChild, get, getChildren, reset, toOperands, toString

Methods inherited from interface org.refcodes.cli.Condition

toOperands

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.refcodes.component.Resetable

reset

Methods inherited from interface org.refcodes.cli.Syntaxable

get, parseArgs, toSyntax

Methods inherited from interface org.refcodes.cli.SyntaxUsage

toUsage, toUsage

Constructor Detail

XorCondition

public XorCondition(Syntaxable... aArgs)

Instantiates a new XorCondition with the Syntaxable (Condition) instances to be nested.

Parameters:

aArgs - The Syntaxable (Condition) instances to be nested

Method Detail

parseArgs

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

Description copied from interface: Syntaxable

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

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

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 AbstractCondition

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.

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.

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

Returns:

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