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diff --git a/src/google/protobuf/compiler/java/java_generator.cc b/src/google/protobuf/compiler/java/java_generator.cc
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://code.google.com/p/protobuf/
+//
+// 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.
+
+// Author: kenton@google.com (Kenton Varda)
+//  Based on original Protocol Buffers design by
+//  Sanjay Ghemawat, Jeff Dean, and others.
+
+#include <google/protobuf/compiler/java/java_generator.h>
+#include <google/protobuf/compiler/java/java_file.h>
+#include <google/protobuf/compiler/java/java_helpers.h>
+#include <google/protobuf/io/printer.h>
+#include <google/protobuf/io/zero_copy_stream.h>
+#include <google/protobuf/descriptor.pb.h>
+#include <google/protobuf/stubs/strutil.h>
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+namespace java {
+
+JavaGenerator::JavaGenerator() {}
+JavaGenerator::~JavaGenerator() {}
+
+bool JavaGenerator::Generate(const FileDescriptor* file,
+                             const string& parameter,
+                             OutputDirectory* output_directory,
+                             string* error) const {
+  vector<pair<string, string> > options;
+  ParseGeneratorParameter(parameter, &options);
+
+  // -----------------------------------------------------------------
+  // parse generator options
+
+  // Name a file where we will write a list of generated file names, one
+  // per line.
+  string output_list_file;
+
+  for (int i = 0; i < options.size(); i++) {
+    if (options[i].first == "output_list_file") {
+      output_list_file = options[i].second;
+    } else {
+      *error = "Unknown generator option: " + options[i].first;
+      return false;
+    }
+  }
+
+
+  // -----------------------------------------------------------------
+
+
+  FileGenerator file_generator(file);
+  if (!file_generator.Validate(error)) {
+    return false;
+  }
+
+  string package_dir =
+    StringReplace(file_generator.java_package(), ".", "/", true);
+  if (!package_dir.empty()) package_dir += "/";
+
+  vector<string> all_files;
+
+  string java_filename = package_dir;
+  java_filename += file_generator.classname();
+  java_filename += ".java";
+  all_files.push_back(java_filename);
+
+  // Generate main java file.
+  scoped_ptr<io::ZeroCopyOutputStream> output(
+    output_directory->Open(java_filename));
+  io::Printer printer(output.get(), '$');
+  file_generator.Generate(&printer);
+
+  // Generate sibling files.
+  file_generator.GenerateSiblings(package_dir, output_directory, &all_files);
+
+  // Generate output list if requested.
+  if (!output_list_file.empty()) {
+    // Generate output list.  This is just a simple text file placed in a
+    // deterministic location which lists the .java files being generated.
+    scoped_ptr<io::ZeroCopyOutputStream> srclist_raw_output(
+      output_directory->Open(output_list_file));
+    io::Printer srclist_printer(srclist_raw_output.get(), '$');
+    for (int i = 0; i < all_files.size(); i++) {
+      srclist_printer.Print("$filename$\n", "filename", all_files[i]);
+    }
+  }
+
+  return true;
+}
+
+}  // namespace java
+}  // namespace compiler
+}  // namespace protobuf
+}  // namespace google