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package org.jruby;

import org.jruby.anno.JRubyMethod;
import org.jruby.anno.JRubyClass;
import org.jruby.runtime.Block;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.builtin.IRubyObject;

@JRubyClass(name="NoMethodError", parent="NameError")
public class RubyNoMethodError extends RubyNameError {
    private IRubyObject args;

    private static final ObjectAllocator NOMETHODERROR_ALLOCATOR = new ObjectAllocator() {
        public IRubyObject allocate(Ruby runtime, RubyClass klass) {
            return new RubyNoMethodError(runtime, klass);
        }
    };

    public static RubyClass createNoMethodErrorClass(Ruby runtime, RubyClass nameErrorClass) {
        RubyClass noMethodErrorClass = runtime.defineClass("NoMethodError", nameErrorClass, NOMETHODERROR_ALLOCATOR);
        
        noMethodErrorClass.defineAnnotatedMethods(RubyNoMethodError.class);

        return noMethodErrorClass;
    }

    protected RubyNoMethodError(Ruby runtime, RubyClass exceptionClass) {
        super(runtime, exceptionClass, exceptionClass.getName());
        this.args = runtime.getNil();
    }
    
    public RubyNoMethodError(Ruby runtime, RubyClass exceptionClass, String message, String name, IRubyObject args) {
        super(runtime, exceptionClass, message,  name);
        this.args = args;
    }    

    @JRubyMethod(name = "initialize", optional = 3, frame = true)
    public IRubyObject initialize(IRubyObject[] args, Block block) {
        if (args.length > 2) {
            this.args = args[args.length - 1];
            IRubyObject []tmpArgs = new IRubyObject[args.length - 1];
            System.arraycopy(args, 0, tmpArgs, 0, tmpArgs.length);
            args = tmpArgs;
        } else {
            this.args = getRuntime().getNil();
        }

        super.initialize(args, block);
        return this;
    }
    
    @JRubyMethod(name = "args")
    public IRubyObject args() {
        return args;
    }

    @Override
    public void copySpecialInstanceVariables(IRubyObject clone) {
        super.copySpecialInstanceVariables(clone);
        RubyNoMethodError exception = (RubyNoMethodError)clone;
        exception.args = args;
    }
}
