ruby/src/main/java/com/google/protobuf/jruby/RubyEnumBuilderContext.java

/*
 * 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,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.google.protobuf.jruby;

import com.google.protobuf.DescriptorProtos.EnumDescriptorProto;
import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.RubyObject;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

@JRubyClass(name = "EnumBuilderContext")
public class RubyEnumBuilderContext extends RubyObject {
    public static void createRubyEnumBuilderContext(Ruby runtime) {
        RubyModule internal = runtime.getClassFromPath("Google::Protobuf::Internal");
        RubyClass cEnumBuilderContext = internal.defineClassUnder("EnumBuilderContext", runtime.getObject(), new ObjectAllocator() {
            @Override
            public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
                return new RubyEnumBuilderContext(runtime, klazz);
            }
        });
        cEnumBuilderContext.defineAnnotatedMethods(RubyEnumBuilderContext.class);
    }

    public RubyEnumBuilderContext(Ruby ruby, RubyClass klazz) {
        super(ruby, klazz);
    }

    @JRubyMethod
    public IRubyObject initialize(ThreadContext context, IRubyObject fileBuilderContext, IRubyObject name) {
        this.fileBuilderContext = (RubyFileBuilderContext) fileBuilderContext;
        this.builder = this.fileBuilderContext.getNewEnumBuilder();
        this.builder.setName(name.asJavaString());
        this.builder.getOptionsBuilder().setAllowAlias(true);

        return this;
    }

    /*
     * call-seq:
     *     EnumBuilder.add_value(name, number)
     *
     * Adds the given name => number mapping to the enum type. Name must be a Ruby
     * symbol.
     */
    @JRubyMethod
    public IRubyObject value(ThreadContext context, IRubyObject name, IRubyObject number) {
        this.builder.addValueBuilder()
            .setName(name.asJavaString())
            .setNumber(RubyNumeric.num2int(number));
        return context.nil;
    }

    private EnumDescriptorProto.Builder builder;
    private RubyFileBuilderContext fileBuilderContext;
}