org.apache.juneau.svl.vars

Class ArgsVar

java.lang.Object

org.apache.juneau.svl.Var

org.apache.juneau.svl.SimpleVar

org.apache.juneau.svl.DefaultingVar

org.apache.juneau.svl.vars.ArgsVar

public class ArgsVar
extends DefaultingVar

JVM args variable resolver.

The format for this var is "$A{arg[,default]}".

This variable resolver requires that the command-line arguments be made available through any of the following:

• "sun.java.command" system property.
• "juneau.args" system property.
• init(Args) has been called.

Example:

// Create an args object from the main(String[]) method. Args args = new Args(argv); ArgsVar.init(args); // Create a variable resolver that resolves JVM arguments (e.g. "$A{1}") VarResolver r = new VarResolver().addVars(ArgsVar.class); // Use it! System.out.println(r.resolve("Arg #1 is set to $A{1}"));

Since this is a SimpleVar, any variables contained in the result will be recursively resolved. Likewise, if the arguments contain any variables, those will be resolved before they are passed to this var.

See Also:

Args, org.apache.juneau.svl

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME The name of this variable.

Constructor Summary

Constructors

Constructor and Description
ArgsVar() Constructor.

Method Summary

Modifier and Type	Method and Description
static void	init(Args args) Initialize the args for this variable.
String	resolve(VarResolverSession session, String key) The interface that needs to be implemented for subclasses of SimpleVar.

Methods inherited from class org.apache.juneau.svl.DefaultingVar

doResolve

Methods inherited from class org.apache.juneau.svl.SimpleVar

resolveTo

Methods inherited from class org.apache.juneau.svl.Var

allowNested, allowRecurse, canResolve, getName

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

The name of this variable.

See Also:

Constant Field Values

Constructor Detail

ArgsVar

public ArgsVar()

Constructor.

Method Detail

init

public static void init(Args args)

Initialize the args for this variable.

Parameters:

args - The parsed command-line arguments.

resolve

public String resolve(VarResolverSession session,
                      String key)

Description copied from class: Var

The interface that needs to be implemented for subclasses of SimpleVar.

Specified by:

resolve in class Var

Parameters:

session - The session object used for a single instance of a var resolution.

key - The inside argument of the variable.

Returns:

The resolved value.