content: /*
   * Protocol Buffers - Google's data interchange format
   * Copyright 2014 Google Inc.  All rights reserved.
   * https://developers.google.com/protocol-buffers/
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package com.google.protobuf.jruby;
  
  import com.google.protobuf.DescriptorProtos;
  import com.google.protobuf.Descriptors;
  import org.jruby.Ruby;
  import org.jruby.RubyClass;
  import org.jruby.RubyModule;
  import org.jruby.RubyObject;
  import org.jruby.RubyNumeric;
  import org.jruby.anno.JRubyClass;
  import org.jruby.anno.JRubyMethod;
  import org.jruby.runtime.Block;
  import org.jruby.runtime.ObjectAllocator;
  import org.jruby.runtime.ThreadContext;
  import org.jruby.runtime.builtin.IRubyObject;
  
  @JRubyClass(name = "EnumDescriptor", include = "Enumerable")
  public class RubyEnumDescriptor extends RubyObject {
      public static void createRubyEnumDescriptor(Ruby runtime) {
          RubyModule mProtobuf = runtime.getClassFromPath("Google::Protobuf");
          RubyClass cEnumDescriptor = mProtobuf.defineClassUnder("EnumDescriptor", runtime.getObject(), new ObjectAllocator() {
              @Override
              public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
                  return new RubyEnumDescriptor(runtime, klazz);
              }
          });
          cEnumDescriptor.includeModule(runtime.getEnumerable());
          cEnumDescriptor.defineAnnotatedMethods(RubyEnumDescriptor.class);
      }
  
      public RubyEnumDescriptor(Ruby runtime, RubyClass klazz) {
          super(runtime, klazz);
      }
  
      /*
       * call-seq:
       *     EnumDescriptor.new => enum_descriptor
       *
       * Creates a new, empty, enum descriptor. Must be added to a pool before the
       * enum type can be used. The enum type may only be modified prior to adding to
       * a pool.
       */
      @JRubyMethod
      public IRubyObject initialize(ThreadContext context) {
          this.builder = DescriptorProtos.EnumDescriptorProto.newBuilder();
          return this;
      }
  
      /*
       * call-seq:
       *     EnumDescriptor.name => name
       *
       * Returns the name of this enum type.
       */
      @JRubyMethod(name = "name")
      public IRubyObject getName(ThreadContext context) {
          return this.name;
      }
  
      /*
       * call-seq:
       *     EnumDescriptor.name = name
       *
       * Sets the name of this enum type. Cannot be called if the enum type has
       * already been added to a pool.
       */
      @JRubyMethod(name = "name=")
      public IRubyObject setName(ThreadContext context, IRubyObject name) {
          this.name = name;
          this.builder.setName(Utils.escapeIdentifier(name.asJavaString()));
          return context.runtime.getNil();
      }
  
      /*
       * call-seq:
       *     EnumDescriptor.add_value(key, value)
       *
       * Adds a new key => value mapping to this enum type. Key must be given as a
       * Ruby symbol. Cannot be called if the enum type has already been added to a
       * pool. Will raise an exception if the key or value is already in use.
       */
      @JRubyMethod(name = "add_value")
      public IRubyObject addValue(ThreadContext context, IRubyObject name, IRubyObject number) {
          DescriptorProtos.EnumValueDescriptorProto.Builder valueBuilder = DescriptorProtos.EnumValueDescriptorProto.newBuilder();
          valueBuilder.setName(name.asJavaString());
          valueBuilder.setNumber(RubyNumeric.num2int(number));
          this.builder.addValue(valueBuilder);
          return context.runtime.getNil();
      }
  
      /*
       * call-seq:
       *     EnumDescriptor.each(&block)
       *
       * Iterates over key => value mappings in this enum's definition, yielding to
       * the block with (key, value) arguments for each one.
       */
      @JRubyMethod
      public IRubyObject each(ThreadContext context, Block block) {
          Ruby runtime = context.runtime;
          for (Descriptors.EnumValueDescriptor enumValueDescriptor : descriptor.getValues()) {
              block.yield(context, runtime.newArray(runtime.newSymbol(enumValueDescriptor.getName()),
                      runtime.newFixnum(enumValueDescriptor.getNumber())));
          }
          return runtime.getNil();
      }
  
      /*
       * call-seq:
       *     EnumDescriptor.enummodule => module
       *
       * Returns the Ruby module corresponding to this enum type. Cannot be called
       * until the enum descriptor has been added to a pool.
       */
      @JRubyMethod
      public IRubyObject enummodule(ThreadContext context) {
          if (this.klazz == null) {
              this.klazz = buildModuleFromDescriptor(context);
          }
          return this.klazz;
      }
  
      public void setDescriptor(Descriptors.EnumDescriptor descriptor) {
          this.descriptor = descriptor;
      }
  
      public Descriptors.EnumDescriptor getDescriptor() {
          return this.descriptor;
      }
  
      public DescriptorProtos.EnumDescriptorProto.Builder getBuilder() {
          return this.builder;
      }
  
      private RubyModule buildModuleFromDescriptor(ThreadContext context) {
          Ruby runtime = context.runtime;
          Utils.checkNameAvailability(context, name.asJavaString());
  
          RubyModule enumModule = RubyModule.newModule(runtime);
          for (Descriptors.EnumValueDescriptor value : descriptor.getValues()) {
              enumModule.defineConstant(value.getName(), runtime.newFixnum(value.getNumber()));
          }
  
          enumModule.instance_variable_set(runtime.newString(Utils.DESCRIPTOR_INSTANCE_VAR), this);
          enumModule.defineAnnotatedMethods(RubyEnum.class);
          return enumModule;
      }
  
      private IRubyObject name;
      private RubyModule klazz;
      private Descriptors.EnumDescriptor descriptor;
      private DescriptorProtos.EnumDescriptorProto.Builder builder;
  }
  