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RubyBuilder.java
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RubyBuilder.java
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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 org.jruby.*;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.*;
import org.jruby.runtime.builtin.IRubyObject;
@JRubyClass(name = "Builder")
public class RubyBuilder extends RubyObject {
public static void createRubyBuilder(Ruby runtime) {
RubyModule internal = runtime.getClassFromPath("Google::Protobuf::Internal");
RubyClass cBuilder = internal.defineClassUnder("Builder", runtime.getObject(), new ObjectAllocator() {
@Override
public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
return new RubyBuilder(runtime, klazz);
}
});
cBuilder.defineAnnotatedMethods(RubyBuilder.class);
}
public RubyBuilder(Ruby runtime, RubyClass metaClass) {
super(runtime, metaClass);
this.cFileBuilderContext = (RubyClass) runtime.getClassFromPath("Google::Protobuf::Internal::FileBuilderContext");
}
/*
* call-seq:
* Builder.new => builder
*
* Creates a new Builder. A Builder can accumulate a set of new message and enum
* descriptors and atomically register them into a pool in a way that allows for
* (co)recursive type references.
*/
@JRubyMethod
public IRubyObject initialize(ThreadContext context, IRubyObject descriptorPool) {
this.descriptorPool = (RubyDescriptorPool) descriptorPool;
return this;
}
/*
* call-seq:
* Builder.add_message(name, &block)
*
* Old and deprecated way to create a new descriptor.
* See FileBuilderContext.add_message for the recommended way.
*
* Exists for backwards compatibility to allow building descriptor pool for
* files generated by protoc which don't add messages within "add_file" block.
* Descriptors created this way get assigned to a default empty FileDescriptor.
*/
@JRubyMethod(name = "add_message")
public IRubyObject addMessage(ThreadContext context, IRubyObject name, Block block) {
ensureDefaultFileBuilder(context);
defaultFileBuilder.addMessage(context, name, block);
return context.nil;
}
/*
* call-seq:
* Builder.add_enum(name, &block)
*
* Old and deprecated way to create a new enum descriptor.
* See FileBuilderContext.add_enum for the recommended way.
*
* Exists for backwards compatibility to allow building descriptor pool for
* files generated by protoc which don't add enums within "add_file" block.
* Enum descriptors created this way get assigned to a default empty
* FileDescriptor.
*/
@JRubyMethod(name = "add_enum")
public IRubyObject addEnum(ThreadContext context, IRubyObject name, Block block) {
ensureDefaultFileBuilder(context);
defaultFileBuilder.addEnum(context, name, block);
return context.nil;
}
/*
* call-seq:
* Builder.add_file(name, options = nil, &block)
*
* Creates a new, file descriptor with the given name and options and invokes
* the block in the context of a FileBuilderContext on that descriptor. The
* block can then call FileBuilderContext#add_message or
* FileBuilderContext#add_enum to define new messages or enums, respectively.
*
* This is the recommended, idiomatic way to build file descriptors.
*/
@JRubyMethod(name = "add_file")
public IRubyObject addFile(ThreadContext context, IRubyObject name, IRubyObject options, Block block) {
RubyFileBuilderContext ctx = (RubyFileBuilderContext) cFileBuilderContext.newInstance(context, descriptorPool, name, options, Block.NULL_BLOCK);
ctx.instance_eval(context, block);
ctx.build(context);
return context.nil;
}
/*
* Used to trigger the build when using the deprecated syntax
*/
protected void build(ThreadContext context) {
if (defaultFileBuilder != null) {
defaultFileBuilder.build(context);
}
}
private void ensureDefaultFileBuilder(ThreadContext context) {
if (defaultFileBuilder == null) {
this.defaultFileBuilder = (RubyFileBuilderContext) cFileBuilderContext.newInstance(context, descriptorPool, context.runtime.newString("ruby_default_file.proto"), Block.NULL_BLOCK);
}
}
private RubyClass cFileBuilderContext;
private RubyDescriptorPool descriptorPool;
private RubyFileBuilderContext defaultFileBuilder;
}