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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) 2014 Timur Duehr <> 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.ext.ffi;
 import org.jruby.Ruby;
Represents a C enum
 @JRubyClass(name="FFI::Enums", parent="Object")
 public final class Enums extends RubyHash {
     private final RubyArray allEnums;
     private final RubyHash taggedEnums;
     public static RubyClass createEnumsClass(Ruby runtimeRubyModule ffiModule) {
         RubyClass enumsClass = ffiModule.defineClassUnder("Enums"runtime.getObject(),
         return enumsClass;
     private static final class Allocator implements ObjectAllocator {
         private static final ObjectAllocator INSTANCE = new Allocator();
         public final IRubyObject allocate(Ruby runtimeRubyClass klass) {
             return new Enums(runtimeklass);
     private Enums(Ruby runtimeRubyClass klass) {
             = RubyArray.newArray(runtime);
          = RubyHash.newHash(runtime);
     @JRubyMethod(name = "initialize", visibility = .)
     public final IRubyObject initialize(ThreadContext context) {
         return (IRubyObjectthis;
     @JRubyMethod(name = "<<")
     public IRubyObject append(final ThreadContext contextIRubyObject item){
         if(!(item instanceof Enum)){
             throw context.runtime.newTypeError(itemcontext.runtime.getFFI()..getClass("Enum"));
         if (!(item == null || item == context.nil)){
             .fastASet(((Enum)item).tag(context), item);
         merge_bang(context, ((Enum)item).symbol_map(context), .);
         return item;
    public boolean isEmpty(){
        return (super.isEmpty() && .isEmpty() && .isEmpty());
    @JRubyMethod(name = "empty?")
    public RubyBoolean empty_p(){
        return isEmpty() ?  getRuntime().getTrue() : getRuntime().getFalse();
    @JRubyMethod(name = "find")
    public IRubyObject find(final ThreadContext contextIRubyObject query){
        if (.has_key_p(query).isTrue()){
            return .fastARef(query);
        for (int i = 0; i < .getLength(); i++){
            IRubyObject item = (IRubyObject).entry(i);
            if (((RubyArray)item.callMethod(context"symbols")).include_p(contextquery).isTrue()){
                return item;
        return context.runtime.getNil();
    @JRubyMethod(name = "__map_symbol")
    public IRubyObject mapSymbol(final ThreadContext contextIRubyObject symbol){
        return op_aref(contextsymbol);
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