Ruby code generator for C++.

Not yet in active use yet but two sample templates are provided.

Note: same dependency story as java codegen: distribution has pre-generated
code so ruby not required to build a distro. Only required for svn working
copy builds.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@561468 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 256 insertions, 0 deletions

diff --git a/cpp/rubygen/samples/Operations.rb b/cpp/rubygen/samples/Operations.rb
new file mode 100755
index 0000000000..1c245ca188
--- /dev/null
+++ b/cpp/rubygen/samples/Operations.rb
@@ -0,0 +1,85 @@
+#!/usr/bin/env ruby
+# Usage: output_directory xml_spec_file [xml_spec_file...]
+# 
+$: << '..'
+require 'cppgen'
+
+class OperationsGen < CppGen
+
+  def initialize(chassis, outdir, amqp)
+    super(outdir, amqp)
+    @chassis=chassis
+    @classname="AMQP_#{@chassis.caps}Operations"
+  end
+  
+  def handler_method (m)
+    gen "\nvirtual void #{m.cppname}("
+    gen m.signature.join(",\n")
+    gen ") = 0;\n"
+  end
+
+  def handler_classname(c) c.name.caps+"Handler"; end
+
+  def handler_class(c)
+    handlerclass=handler_classname c
+    gen <<EOS
+// ==================== class #{handlerclass} ====================
+class #{handlerclass} : Invocable {
+    // Constructors and destructors
+  public:
+    #{handlerclass}(){};
+    virtual ~#{handlerclass}() {}
+    // Protocol methods
+EOS
+    c.methods_on(@chassis).each { |m| handler_method(m) }
+    gen <<EOS
+}; // class #{handlerclass}
+
+
+EOS
+  end
+
+  def handler_get(c)
+    handlerclass=handler_classname c
+    gen "virtual #{handlerclass}* get#{handlerclass}() = 0;\n"
+  end
+
+  def generate()
+    h_file("#{@classname}.h") { 
+      gen <<EOS
+#include <sstream> 
+#include "qpid/framing/ProtocolVersion.h"
+
+namespace qpid {
+namespace framing {
+
+class #{@classname} {
+
+  public:
+    virtual ~#{@classname}() {}
+
+    virtual ProtocolVersion getVersion() const = 0;
+
+    // Include framing constant declarations
+    #include "AMQP_Constants.h"
+
+    // Inner classes
+EOS
+  indent { @amqp.classes.each { |c| handler_class(c) } }
+  gen <<EOS
+
+    // Method handler get methods
+
+EOS
+  indent { @amqp.classes.each { |c| handler_get(c) } }
+  gen <<EOS
+}; /* class #{@classname} */
+}
+EOS
+}
+  end
+end
+
+OperationsGen.new("client",ARGV[0], Amqp).generate()
+OperationsGen.new("server",ARGV[0], Amqp).generate()
+
diff --git a/cpp/rubygen/samples/Proxy.rb b/cpp/rubygen/samples/Proxy.rb
new file mode 100755
index 0000000000..f7765f3729
--- /dev/null
+++ b/cpp/rubygen/samples/Proxy.rb
@@ -0,0 +1,153 @@
+#!/usr/bin/env ruby
+$: << ".."                      # Include .. in load path
+require 'cppgen'
+
+class ProxyGen < CppGen
+    
+  def initialize(chassis, outdir, amqp)
+    super(outdir, amqp)
+    @chassis=chassis
+    @classname="AMQP_#{@chassis.caps}Proxy"
+  end
+
+  def include(m) gen "#include \"#{m.body_name}.h\"\n"; end
+
+  def proxy_member(c) c.name.lcaps+"Proxy"; end
+  
+  def inner_class_decl(c)
+    cname=c.name.caps
+    gen <<EOS
+    // ==================== class #{cname} ====================
+    class #{cname}
+    {
+      private:
+        ChannelAdapter& channel;
+
+      public:
+        // Constructors and destructors
+
+        #{cname}(ChannelAdapter& ch) : 
+            channel(ch) {}
+        virtual ~#{cname}() {}
+
+        static #{cname}& get(#{@classname}& proxy) { return proxy.get#{cname}();}
+
+        // Protocol methods
+EOS
+    indent(2) { c.methods_on(@chassis).each { |m| inner_method_decl(m) } }
+    gen "\n    }; // class #{cname}\n\n"
+  end
+
+  def inner_method_decl(m)
+    gen "virtual void #{m.cppname}(#{m.signature.join(",\n            ")})\n\n";
+  end
+
+  def inner_class_defn(c)
+    cname=c.cppname
+    gen "// ==================== class #{cname} ====================\n"
+    c.methods_on(@chassis).each { |m| inner_method_defn(m, cname) }
+  end
+  
+  def inner_method_defn(m,cname)
+    if m.response?
+      rettype="void"
+      ret=""
+      sigadd=["RequestId responseTo"]
+      paramadd=["channel.getVersion(), responseTo"]
+    else
+      rettype="RequestId"
+      ret="return "
+      sigadd=[]
+      paramadd=["channel.getVersion()"]
+    end
+    sig=(m.signature+sigadd).join(", ")
+    params=(paramadd+m.param_names).join(",\n            ")
+    gen <<EOS
+#{rettype} #{@classname}::#{cname}::#{m.cppname}(#{sig}) {
+    #{ret}channel.send(new #{m.body_name}(#{params}));
+}
+
+EOS
+  end
+
+  def get_decl(c)
+    cname=c.name.caps
+    gen "    #{cname}& #{@classname}::get#{cname}();\n"
+  end
+  
+  def get_defn(c)
+    cname=c.name.caps
+    gen <<EOS
+#{@classname}::#{c.name.caps}& #{@classname}::get#{c.name.caps}()
+{
+    return #{proxy_member(c)};
+}
+EOS
+  end
+
+  def generate
+    # .h file
+    h_file(@classname+".h") {
+      gen <<EOS
+#include "qpid/framing/Proxy.h"
+
+namespace qpid {
+namespace framing {
+
+class #{@classname} : public Proxy
+{
+public:
+    #{@classname}(ChannelAdapter& ch);
+
+    // Inner class definitions
+EOS
+    @amqp.classes.each{ |c| inner_class_decl(c) }
+    gen "    // Inner class instance get methods\n"
+    @amqp.classes.each{ |c| get_decl(c) }
+    gen <<EOS
+  private:
+    // Inner class instances
+EOS
+    indent { @amqp.classes.each{ |c| gen c.cppname+" "+proxy_member(c)+";\n" } }
+    gen <<EOS
+}; /* class #{@classname} */
+
+} /* namespace framing */
+} /* namespace qpid */
+EOS
+  }
+
+  # .cpp file
+  cpp_file(@classname+".cpp") {
+    gen <<EOS
+#include <sstream>
+#include "#{@classname}.h"
+#include "qpid/framing/ChannelAdapter.h"
+#include "qpid/framing/amqp_types_full.h"
+EOS
+    @amqp.methods_on(@chassis).each { |m| include(m) }
+    gen <<EOS
+namespace qpid {
+namespace framing {
+
+#{@classname}::#{@classname}(ChannelAdapter& ch) :
+EOS
+    gen "    Proxy(ch)"
+    @amqp.classes.each { |c| gen ",\n    "+proxy_member(c)+"(channel)" }
+    gen <<EOS
+    {}
+
+    // Inner class instance get methods
+EOS
+    @amqp.classes.each { |c| get_defn(c) }
+    gen "    // Inner class implementation\n\n"
+    @amqp.classes.each { |c| inner_class_defn(c) }
+    gen "}} // namespae qpid::framing"
+  }
+   end
+end
+
+
+ProxyGen.new("client", ARGV[0], Amqp).generate;
+ProxyGen.new("server", ARGV[0], Amqp).generate;
+    
diff --git a/cpp/rubygen/samples/runme b/cpp/rubygen/samples/runme
new file mode 100755
index 0000000000..e06d128707
--- /dev/null
+++ b/cpp/rubygen/samples/runme
@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+#
+# Run this script to generate code for the C++ broker.
+# 
+$: << ".."                      # Include .. in load path
+if ARGV.size < 2
+  puts "Usage: <output_directory> <amqp .xml files...>"
+  puts "Note: passing '-' as the output directory lists generated files."
+  exit 1
+end
+
+require 'amqpgen'
+Amqp=AmqpRoot.new(*ARGV[1,ARGV.size])
+
+require 'Proxy.rb'
+require 'Operations.rb'
+
+