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/*
* 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.Descriptors;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
public class RubyEnum {
/*
* call-seq:
* Enum.lookup(number) => name
*
* This module method, provided on each generated enum module, looks up an enum
* value by number and returns its name as a Ruby symbol, or nil if not found.
*/
@JRubyMethod(meta = true)
public static IRubyObject lookup(ThreadContext context, IRubyObject recv, IRubyObject number) {
RubyEnumDescriptor rubyEnumDescriptorescriptor = (RubyEnumDescriptor) getDescriptor(context, recv);
Descriptors.EnumDescriptor descriptor = rubyEnumDescriptorescriptor.getDescriptor();
Descriptors.EnumValueDescriptor value = descriptor.findValueByNumber(RubyNumeric.num2int(number));
if (value == null) return context.runtime.getNil();
return context.runtime.newSymbol(value.getName());
}
/*
* call-seq:
* Enum.resolve(name) => number
*
* This module method, provided on each generated enum module, looks up an enum
* value by name (as a Ruby symbol) and returns its name, or nil if not found.
*/
@JRubyMethod(meta = true)
public static IRubyObject resolve(ThreadContext context, IRubyObject recv, IRubyObject name) {
RubyEnumDescriptor rubyEnumDescriptorescriptor = (RubyEnumDescriptor) getDescriptor(context, recv);
Descriptors.EnumDescriptor descriptor = rubyEnumDescriptorescriptor.getDescriptor();
Descriptors.EnumValueDescriptor value = descriptor.findValueByName(name.asJavaString());
if (value == null) return context.runtime.getNil();
return context.runtime.newFixnum(value.getNumber());
}
/*
* call-seq:
* Enum.descriptor
*
* This module method, provided on each generated enum module, returns the
* EnumDescriptor corresponding to this enum type.
*/
@JRubyMethod(meta = true, name = "descriptor")
public static IRubyObject getDescriptor(ThreadContext context, IRubyObject recv) {
return ((RubyModule) recv).getInstanceVariable(Utils.DESCRIPTOR_INSTANCE_VAR);
}
}
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