import from svn

MIT-LICENSE

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+Copyright (c) 2010 [name of plugin creator]
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README

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+ODataServer
+===========
+
+Introduction goes here.
+
+
+Example
+=======
+
+Example goes here.
+
+
+Copyright (c) 2010 [name of plugin creator], released under the MIT license

Rakefile

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+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+desc 'Default: run unit tests.'
+task :default => :test
+
+desc 'Test the o_data_server plugin.'
+Rake::TestTask.new(:test) do |t|
+  t.libs << 'lib'
+  t.libs << 'test'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = true
+end
+
+desc 'Generate documentation for the o_data_server plugin.'
+Rake::RDocTask.new(:rdoc) do |rdoc|
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title    = 'ODataServer'
+  rdoc.options << '--line-numbers' << '--inline-source'
+  rdoc.rdoc_files.include('README')
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end

app/controllers/o_data_controller.rb

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+class ODataController < ApplicationController
+  cattr_reader :path_param
+  @@path_param = :__path__.freeze
+
+  cattr_reader :schema
+  @@schema = OData::ActiveRecordSchema::Base.new.freeze
+
+  cattr_reader :parser
+  @@parser = OData::AbstractQuery::Parser.new(@@schema).freeze
+
+  rescue_from OData::ODataException, :with => :handle_exception
+  rescue_from ActiveRecord::RecordNotFound, :with => :handle_exception
+
+  before_filter :extract_resource_path_and_query_string, :only => [:resource]
+  before_filter :parse_resource_path_and_query_string!,  :only => [:resource]
+  before_filter :set_request_format!,                    :only => [:resource]
+
+  %w{service metadata resource}.each do |method_name|
+    define_method(:"redirect_to_#{method_name}") do
+      # redirect_to(send(:"o_data_#{method_name}_url"))
+      redirect_to(params.merge(:action => method_name.to_s))
+    end
+  end
+
+  def service
+    respond_to do |format|
+      format.xml  # service.xml.builder
+      format.json { render :json => @@schema.to_json }
+    end
+  end
+
+  def metadata
+    respond_to do |format|
+      format.xml  # metadata.xml.builder
+    end
+  end
+
+  def resource
+    @last_segment = @query.segments.last
+
+    @results = @query.execute!
+
+    case @last_segment.class.segment_name
+    when OData::AbstractQuery::Segments::CountSegment.segment_name
+      render :text => @results.to_i
+    when OData::AbstractQuery::Segments::LinksSegment.segment_name
+      request.format = :xml unless request.format == :json
+
+      respond_to do |format|
+        format.xml  { render :inline => "xml.instruct!; @results.empty? ? xml.links('xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices') : xml.links('xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices') { @results.each { |r| xml.uri(o_data_resource_url(r[1])) } }", :type => :builder }
+        format.json { render :json => { "links" => @results.collect { |r| { "uri" => r } } }.to_json }
+      end
+    when OData::AbstractQuery::Segments::ValueSegment.segment_name
+      render :text => @results.to_s
+    when OData::AbstractQuery::Segments::PropertySegment.segment_name
+      request.format = :xml unless request.format == :json
+
+      respond_to do |format|
+        format.xml  { render :inline => "xml.instruct!; value.blank? ? xml.tag!(key.to_sym, 'm:null' => true, 'xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices', 'xmlns:m' => 'http://schemas.microsoft.com/ado/2007/08/dataservices') : xml.tag!(key.to_sym, value, 'edm:Type' => type, 'xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices', 'xmlns:edm' => 'http://schemas.microsoft.com/ado/2007/05/edm')", :locals => { :key => @results.keys.first.name, :type => @results.keys.first.return_type, :value => @results.values.first }, :type => :builder }
+        format.json { render :json => { @results.keys.first.name => @results.values.first }.to_json }
+      end
+    when OData::AbstractQuery::Segments::NavigationPropertySegment.segment_name
+      @countable = @last_segment.countable?
+
+      @navigation_property = @last_segment.navigation_property
+      @polymorphic = @navigation_property.to_end.polymorphic?
+
+      if @polymorphic
+        @entity_type = nil
+        @entity_type_name = @navigation_property.to_end.name.singularize
+      else
+        @entity_type = @navigation_property.to_end.entity_type
+        @entity_type_name = @entity_type.name
+      end
+
+      @collection_name = @entity_type_name.pluralize
+
+      @expand_navigation_property_paths = {}
+      if expand_option = @query.options.find { |o| o.option_name == OData::AbstractQuery::Options::ExpandOption.option_name }
+        @expand_navigation_property_paths = expand_option.navigation_property_paths
+      end
+
+      respond_to do |format|
+        format.atom # resource.atom.builder
+        format.json # resource.json.erb
+      end
+    when OData::AbstractQuery::Segments::CollectionSegment.segment_name
+      @countable = @last_segment.countable?
+
+      @navigation_property = nil
+      @polymorphic = true
+
+      @entity_type = @last_segment.entity_type
+
+      @expand_navigation_property_paths = {}
+      if expand_option = @query.options.find { |o| o.option_name == OData::AbstractQuery::Options::ExpandOption.option_name }
+        @expand_navigation_property_paths = expand_option.navigation_property_paths
+      end
+
+      respond_to do |format|
+        format.atom # resource.atom.builder
+        format.json # resource.json.erb
+      end
+    else
+      # in theory, this branch is unreachable because the <tt>parse_resource_path_and_query_string!</tt>
+      # method will throw an exception if the <tt>OData::AbstractQuery::Parser</tt> fails to match any
+      # segment of the resource path.
+      raise OData::AbstractQuery::Errors::AbstractQueryException.new(@query)
+    end
+  end
+
+  private
+
+  def extract_resource_path_and_query_string
+    @resource_path = params[@@path_param].join('/')
+
+    @query_string = params.inject({}) { |acc, pair|
+      key, value = pair
+      acc[key.to_sym] = value unless [@@path_param, :controller, :action].include?(key.to_sym)
+      acc
+    }.collect { |key, value|
+      key.to_s + '=' + value.to_s
+    }.join('&')
+  end
+
+  def parse_resource_path_and_query_string!
+    @query = @@parser.parse!([@resource_path, @query_string].compact.join('?'))
+  end
+
+  def set_request_format!
+    if format_option = @query.options.find { |o| o.option_name == OData::AbstractQuery::Options::FormatOption.option_name }
+      if format_value = format_option.value
+        request.format = format_value.to_sym
+      end
+    end
+  end
+
+  def handle_exception(ex)
+    request.format = :xml
+
+    respond_to do |format|
+      format.xml { render :inline => "xml.instruct!; xml.error('xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices/metadata') { xml.code(code.to_s); xml.message(message); xml.uri(uri) }", :type => :builder, :locals => { :code => nil, :message => ex.message, :uri => request.url } }
+    end
+  end
+end