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package org.jruby.ir.operands;

import org.jruby.ir.IRVisitor;
import org.jruby.ir.Interp;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

public class GlobalVariable extends Reference {
    public GlobalVariable(String name) {
        super(name);
    }

    public int compareTo(Object arg0) {
        // ENEBO: what should compareTo when it is not comparable?
        if (!(arg0 instanceof GlobalVariable)) return 0;

        return getName().compareTo(((GlobalVariable) arg0).getName());
    }
    
    @Interp
    @Override
    public Object retrieve(ThreadContext context, IRubyObject self, DynamicScope currDynScope, Object[] temp) {
        return context.runtime.getGlobalVariables().get(getName());
    }

    @Override
    public void visit(IRVisitor visitor) {
        visitor.GlobalVariable(this);
    }
}