class_file_utils.rb

# Cloud Foundry Java Buildpack
# Copyright 2013-2017 the original author or authors.
#
# 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 'java_buildpack/util'
require 'pathname'

module JavaBuildpack
  module Util

    # Utilities for dealing with .class files
    class ClassFileUtils

      private_class_method :new

      class << self

        # Returns all the .class files in the given directory
        #
        # @param [JavaBuildpack::Component::Application] application the application to search
        # @return [Array<Pathname>] a possibly empty list of files
        def class_files(application)
          (application.root + CLASS_FILE_PATTERN).glob.reject(&:directory?).sort
        end

        CLASS_FILE_PATTERN = '**/*.class'.freeze

        private_constant :CLASS_FILE_PATTERN

      end

    end

  end
end