postgresql_jdbc.rb

# Encoding: utf-8
# Cloud Foundry Java Buildpack
# Copyright 2013 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 'fileutils'
require 'java_buildpack/framework'
require 'java_buildpack/util/service_utils'
require 'java_buildpack/versioned_dependency_component'

module JavaBuildpack::Framework

  # Encapsulates the functionality for enabling the Postgres JDBC client.
  class PostgresqlJdbc < JavaBuildpack::VersionedDependencyComponent

    def initialize(context)
      super('Postgresql JDBC', context)
    end

    def compile
      download_jar jar_name
    end

    def release
    end

    protected

    def supports?
      !has_driver? && JavaBuildpack::Util::ServiceUtils.find_service(@vcap_services, SERVICE_NAME)
    end

    private

    SERVICE_NAME = /postgres/.freeze

    def jar_name
      "#{@parsable_component_name}-#{@version}.jar"
    end

    def has_driver?
      !@application.glob('postgresql-*.jar').empty?
    end

  end

end