contrib/jwrapper: Added basic UI

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>

diff --git a/contrib/jwrapper/src/jwrapper.nit b/contrib/jwrapper/src/jwrapper.nit
new file mode 100644 (file)
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+++ b/contrib/jwrapper/src/jwrapper.nit
@@ -0,0 +1,80 @@
+# This file is part of NIT (http://www.nitlanguage.org).
+#
+# Copyright 2014 Frédéric Vachon <fredvac@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# jwrapper is a Nit extern class generator `in "Java"`.
+# It takes a .class file and output a Nit file. For further details on installation and usage, refer to the README file.
+#
+# Here's an overview of the project design :
+# * Grammar and lexer : `grammar/javap.sablecc`
+# * The `javap_visitor` implements the visitor that extracts data from the AST
+# * The `code_generator` takes these data and converts it to Nit code via the `jtype_converter` module and generate the output Nit file.
+# * The `types` contains data structures used to represent the data
+# * The `jwrapper` module implements the user interface
+module jwrapper
+
+import opts
+import javap_test_parser
+import code_generator
+import javap_visitor
+
+var opts = new OptionContext
+
+var opt_attr = new OptionBool("Generate attributes", "-a", "--with-attributes")
+var opt_comment = new OptionBool("Comment methods/attributes containing unknown types", "-c", "--comment")
+var opt_wrap = new OptionBool("Create extern classes wrapping unknown types (Default)", "-w", "--wrap")
+var opt_help = new OptionBool("Show this help message", "-h", "--help")
+
+opts.add_option(opt_attr, opt_comment, opt_wrap, opt_help)
+
+opts.parse(args)
+
+if opt_wrap.value and opt_comment.value then
+       print "Error: Can't use both '-c' and '-w'"
+       exit 1
+end
+
+if not opts.errors.is_empty or opts.rest.length != 2 or opt_help.value then
+       print "USAGE: jwrapper [OPTIONS] class_file nit_file"
+       print "Options:"
+       opts.usage
+
+       if opt_help.value then exit 0
+       exit 1
+end
+
+var dot_class = opts.rest[0]
+var out_file = opts.rest[1]
+
+if not "javap".program_is_in_path then
+       print "ERROR: 'javap' not found."
+       exit 1
+end
+
+var javap = new IProcess("javap", "-public", dot_class)
+
+# Eat the superfluous output line
+javap.read_line
+
+var p = new TestParser_javap
+var tree = p.work(javap.read_all)
+
+var converter = new JavaTypeConverter
+
+var visitor = new JavaVisitor(converter)
+visitor.enter_visit(tree)
+
+var generator = new CodeGenerator(out_file, visitor.java_class, opt_attr.value, opt_comment.value)
+generator.generate