# Cloud Foundry Java Buildpack

# Copyright (c) 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 'java_buildpack/framework'

require 'shellwords'

module JavaBuildpack::Framework

# Encapsulates the detect, compile, and release functionality for contributing custom Java options to an application

# at runtime.

class JavaOpts

# Creates an instance, passing in an arbitrary collection of options.

#

# @param [Hash] context the context that is provided to the instance

# @option context [Array<String>] :java_opts an array that Java options can be added to

# @option context [Hash] :configuration the properties provided by the user

def initialize(context = {})

@java_opts = context[:java_opts]

@configuration = context[:configuration]

end

# Detects whether this application contributes Java options.

#

# @return [String] returns +java-opts+ if Java options have been set by the user

def detect

@configuration.has_key?(CONFIGURATION_PROPERTY) ? CONTAINER_NAME : nil

end

# Does nothing as no transformations are required when contributing Java options

#

# @return [void]

def compile

end

# Adds the contents of +java.opts+ to the +context[:java_opts]+ for use when running the application

#

# @return [void]

def release

@configuration[CONFIGURATION_PROPERTY].shellsplit.map do |java_opt|

@java_opts << java_opt.gsub(/([\s])/, '\\\\\1')

end

end

private

CONFIGURATION_PROPERTY = 'java_opts'.freeze

CONTAINER_NAME = 'java-opts'.freeze

end

end