Class: OMF::SFA::Resource::OProperty

Inherits:
Base::LObject
  • Object
show all
Includes:
DataMapper::Resource
Defined in:
lib/omf-sfa/resource/oproperty.rb

Overview

Each resource will have a few properties.

Constant Summary collapse

@@name2class = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

._analyse_value(val) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 159

def self._analyse_value(val)

  if val.is_a? Numeric
    return {v: val, t: ((val.is_a? Integer) ? 'i' : 'f'), f: :n_value}
  elsif val.is_a? String
    return {v: val, t: 's', f: :s_value}
  elsif val.is_a? Symbol
    return {v: val.to_s, t: 's', f: :s_value}
  elsif val.is_a? OResource
    return {v: val.uuid.to_s, t: 'r', f: :s_value}
  elsif val.is_a? Time
    return {v: val.to_i, t: 't', f: :n_value}
  elsif val.class.included_modules.include?(DataMapper::Resource)
    #puts "SET>>>>> #{val}:#{val.class}"
    return {v: "#{val.class}@#{val.id}", t: 'd', f: :s_value}
  else
    #debug "SETTING VALUE>  Class: #{val.class}"
    return {v: JSON.generate([val]), t: 'o', f: :s_value}
  end
end

._build_query(query, resource_class = nil) ⇒ Object

Query:

resource: Resource to find properties for
name: Name of property
value: Value of property

Return the FROM and WHERE elements for ‘query’

TODO: THIS IS REALLY BROKEN! Need to define what a query is in this context



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# File 'lib/omf-sfa/resource/oproperty.rb', line 95

def self._build_query(query, resource_class = nil)
  #puts ">>>QUERY>>> #{query}"
  i = 0
  resource = nil
  where = query.map do |pn, v|
    tbl = "p#{i}"
    case pn.to_sym
    when :resource
      unless v.is_a? OResource
        raise "Expected type OResource for :resource, but got '#{v}::#{v.class}'"
      end
      resource = v
      "r.id = #{resource.id}"
      #"#{tbl}.o_resource_id = #{v.id}"
    # resource property 'name' is not stored as a property but as a column in the resource
    # when :name
    #   "r.name = '#{v}'"
    else
      h = _analyse_value(v)
      i += 1
      if (val = h[:v]).is_a? String
        val = "'#{val}'"
      end
      op = (h[:t] == 's' ? 'LIKE' : '=')
      # TODO: Would also need to add a where clause "#{tbl}.name = #{pn} "
      "#{tbl}.#{h[:f]} #{op} #{val}"
    end
  end

  i.times do |j|
    where << "r.id = p#{j}.o_resource_id"
  end
  where << "r.type = '#{resource_class}'" if resource_class
  table = storage_names[:default]
  from = i.times.map {|j| "#{table} AS p#{j}" }
  from << "omf_sfa_resource_o_resources AS r" # TODO: Shouldn't hard-code that (why not?)
  [from, where]
end

._create_resource(query_result) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 135

def self._create_resource(query_result)
  qr = query_result
  unless klass = @@name2class[qr.type]
    begin
    klass = qr.type.split('::').inject(Object) do |mod, class_name|
      mod.const_get(class_name)
    end
    rescue Exception => ex
      warn "Can't find class '#{qr.type}' for resource - #{ex}"
      return nil
    end
    @@name2class[qr.type] = klass
  end
  klass.first(id: qr.id, uuid: qr.uuid, name: qr.name) # TODO: Does this create a DB call?
end

.count(query) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 78

def self.count(query)
  from, where = self._build_query(query)
  q = "SELECT COUNT(r.id) FROM #{from.join(', ')} WHERE #{where.join(' AND ')};"
  res = repository(:default).adapter.select(q)
  #debug "count res: #{res} q: #{query} sql: #{q}"
  res[0]
end

.create(attr = {}) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 50

def self.create(attr = {})
  if (value = attr.delete(:value))
    h = self._analyse_value(value)
    attr[h[:f]] = h[:v]
    attr[:type] = h[:t]
  end
  super
end

.prop_all(query, opts = {}, resource_class = nil) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 59

def self.prop_all(query, opts = {}, resource_class = nil)
  from, where = self._build_query(query, resource_class)
  q = "SELECT DISTINCT r.id, r.type, r.uuid, r.name FROM #{from.join(', ')} WHERE #{where.join(' AND ')};"
  if l = opts[:limit]
    q += " LIMIT #{l} OFFSET #{opts[:offset] || 0}"
  end
  debug "prop_all q: #{q}"
  res = repository(:default).adapter.select(q)
  ores = res.map do |qr|
    if resource_class
      resource_class.first(id: qr.id, uuid: qr.uuid, name: qr.name) # TODO: Does this create a DB call?
    else
      _create_resource(qr)
    end
  end
  #puts "RES>>> #{ores}"
  ores
end

Instance Method Details

#_dirty_self? ⇒ Object

end



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# File 'lib/omf-sfa/resource/oproperty.rb', line 228

alias_method :_dirty_self?, :dirty_self?

#dirty_self? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/omf-sfa/resource/oproperty.rb', line 229

def dirty_self?
  #puts "#{object_id} DIRTY CHECK #{@value_dirty}"
  return true if @value_dirty || _dirty_self?
  if @old_value_
    return @old_value_ != @value_
  end
  false
end

#to_hash ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 238

def to_hash
  {name: self.name, value: self.value}
end

#to_json(*args) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 242

def to_json(*args)
  to_hash.to_json(*args)
end

#to_s ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 246

def to_s()
  "#<#{self.class} id: #{self.id} subj: #{self.o_resource} name: #{self.name} value: #{self.value}>"
end

#valid?(context = :default) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/omf-sfa/resource/oproperty.rb', line 217

def valid?(context = :default)
  self.name != nil #&& self.value != nil
end

#value ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 180

def value()
  case type = attribute_get(:type)
  when 'i'
    val =  attribute_get(:n_value).to_i
  when 'f'
    val =  attribute_get(:n_value)
  when 's'
    val = attribute_get(:s_value)
  when 'r'
    uuid_s = attribute_get(:s_value)
    uuid = UUIDTools::UUID.parse(uuid_s)
    #puts "RRRR >> #{uuid}"
    #puts "OOOO >> #{OResource.all.to_a}"
    val = OResource.first(uuid: uuid)
  when 't'
    val = Time.at(attribute_get(:n_value))
  when 'd'
    v = attribute_get(:s_value)
    klass_s, id_s = v.split('@')
    klass = klass_s.split('::').inject(Kernel) {|k, s| k.const_get(s) }
    val = klass.first(id: id_s.to_i)
    #puts "GET>>>>> #{v} - #{val}"
  when 'o'
    js = attribute_get(:s_value)
    #debug "GET VALUE>  <#{js}>"
    # http://www.ruby-lang.org/en/news/2013/02/22/json-dos-cve-2013-0269/
    val = JSON.load(js)[0]
    #puts "VALUE: #{js.inspect}-#{val.inspect}-#{val.class}"
    if val.kind_of? Array
      #val.tap {|v| v.extend(OPropertyArray).instance_variable_set(:@oproperty, self) }
    end
  else
    throw "Unknown property type '#{type}'"
  end
  return val
end

#value=(val) ⇒ Object 



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# File 'lib/omf-sfa/resource/oproperty.rb', line 151

def value=(val)
  h = self.class._analyse_value(val)
  #puts "VALUE>>> #{h}"
  attribute_set(h[:f], h[:v])
  attribute_set(:type, h[:t])
  save
end