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**** BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2011 Yoko Harada <> Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. **** END LICENSE BLOCK *****
 package org.jruby.embed.variable;
 import java.util.List;

 public class Argv extends AbstractVariable {
     private static String pattern = "ARGV";

Returns an instance of this class. This factory method is used when an ARGV is put in org.jruby.embed.internal.BiVariableMap.

name a variable name
javaObject Java object that should be assigned to.
the instance of Constant
     public static BiVariable getInstance(RubyObject receiverString nameObject... javaObject) {
         if (name.matches()) {
             return new Argv(receivernamejavaObject);
         return null;
     private Argv(RubyObject receiverString nameObject... javaObjects) {
         assert javaObjects != null;
          = javaObjects[0];
         if ( == null) {
              = null;
         } else if (javaObjects.length > 1) {
              = (ClassjavaObjects[1];
         } else {
              = .getClass();
     private void updateArgvByJavaObject() {
         RubyArray ary = RubyArray.newArray(.getRuntime());
         if ( instanceof Collection) {
         } else if ( instanceof String[]) {
             for (String s : (String[])) {
          = ary;

A constructor used when ARGV is retrieved from Ruby.

receiver a receiver object that this variable/constant is originally in. When the variable/constant is originated from Ruby, receiver may not be null.
name the constant name
irubyObject Ruby constant object
     Argv(IRubyObject receiverString nameIRubyObject irubyObject) {

Returns enum type of this variable defined in BiVariable.

this enum type, BiVariable.Type.InstanceVariable.
    public Type getType() {
        return .;
Returns true if the given name is ARGV. Unless returns false.

name is a name to be checked.
true if the given name is ARGV.
    public static boolean isValidName(Object name) {
        return isValidName(name);

Injects ARGV values to a parsed Ruby script. This method is invoked during EvalUnit#run() is executed.

runtime is environment where a variable injection occurs
receiver is the instance that will have variable injection.
    public void inject() {
        RubyModule rubyModule = getRubyClass(.getRuntime());
        if (rubyModule == nullrubyModule = .getRuntime().getCurrentContext().getRubyClass();
        if (rubyModule == nullreturn;
         = true;

Removes this object from org.jruby.embed.internal.BiVariableMap. Also, initialize this variable in top self.
    public void remove() {
         = new ArrayList();
Retrieves ARGV from Ruby after the evaluation or method invocation.

runtime Ruby runtime
receiver receiver object returned when a script is evaluated.
vars map to save retrieved constants.
    public static void retrieve(RubyObject receiverBiVariableMap vars) {
        if (vars.isLazy()) return;
    private static void updateARGV(IRubyObject receiverBiVariableMap vars) {
        String name = "ARGV".intern();
        IRubyObject argv = receiver.getRuntime().getTopSelf().getMetaClass().getConstant(name);
        if (argv == null || (argv instanceof RubyNil)) return;
        BiVariable var;  // This var is for ARGV.
        // ARGV constant should be only one
        if (vars.containsKey((Object)name)) {
            var = vars.getVariable((RubyObject)receiver.getRuntime().getTopSelf(), name);
        } else {
            var = new Constant(receiver.getRuntime().getTopSelf(), nameargv);
Retrieves ARGV by key from Ruby runtime after the evaluation. This method is used when eager retrieval is off.

receiver receiver object returned when a script is evaluated.
vars map to save retrieved instance variables.
key instace varible name
    public static void retrieveByKey(RubyObject receiverBiVariableMap varsString key) {
        assert key.equals("ARGV");
    public Object getJavaObject() {
        if ( == null || !) {
            return ;
        RubyArray ary = (RubyArray);
        if ( == null) { // firstly retrieved from Ruby
             = new ArrayList<String>();
            return ;
        } else if ( == String[].class) {
             = new String[ary.size()];
            for (int i=0; i<ary.size(); i++) {
                ((String[]))[i] = (Stringary.get(i);
            return ;
        } else if ( instanceof List) {
            try {
            } catch (UnsupportedOperationException e) {
                // no op. no way to update.
            return ;
        return null;
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