j2bson (json to bson) executable (neomantra)

bin/j2bson

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+#!/usr/bin/ruby
+# encoding: UTF-8
+
+# --
+# Copyright (C) 2008-2010 10gen Inc.
+#
+# 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.
+# ++
+
+require 'rubygems'
+require 'bson'
+
+# We don't use YAJL because we need to specify the class
+# to store the JSON object in.  BSON is ordered so we need BSON::OrderedHash
+#
+# We use json/pure because json/ext is broken with BSON::OrderedHash
+# (probably for the same reasons that we can't use YAJL).
+begin
+require 'json/pure'  # broken with 'json/ext'
+rescue LoadError
+  puts "This script requires json/pure. Please install one of the following:"
+  puts "  gem install json_pure" 
+  puts "  gem install json" 
+  Process.exit
+end
+
+# Convert all JSON objects in an IO into BSON.
+def print_j2bson(io)
+  io.each_line do |line|
+    jsonobj = JSON.parse(line, { :object_class => BSON::OrderedHash } )
+    bsonobj = BSON.serialize(jsonobj)
+    STDOUT << bsonobj.to_s
+  end
+end
+
+# print usage
+def usage()
+    STDERR << <<END_OF_USAGE
+usage:  j2bson [-h] [file1 [file2]]
+
+   Converts a JSON file to BSON on STDOUT.
+   You can pass multiple filenames.
+   If no filenames are passed, then STDIN is consumed.
+
+END_OF_USAGE
+    exit
+end
+
+# no arg, use STDIN
+# -h, print usage and exit
+# otherwise loop of filenames
+if ARGV.empty? then
+    print_j2bson(STDIN)
+    exit
+elsif ARGV[0] == "-h" then
+    usage()
+else
+    ARGV.each { |fname| print_j2bson(File.new(fname)) }
+end