Module: XMLHash

Defined in:
lib/lyrics/utils/xmlhash.rb

Class Method Summary collapse

Class Method Details

.read(file, hash, only_hash_keys = true) ⇒ Object 



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# File 'lib/lyrics/utils/xmlhash.rb', line 62

def XMLHash.read( file, hash, only_hash_keys=true )

  begin
    read_file = nil
    read_file = file.is_a?( File ) ? file : File.new( file, "r" )
    elements = REXML::Document.new( read_file ).root.elements
    return false if elements == nil
  rescue Exception => e
    return false
  ensure
    read_file.close() if read_file && read_file != file
  end

  requested_keys = hash.keys

  keys = hash.keys
  if ! only_hash_keys
    elements.each() do |element|
      key = element.name
      keys << key if ! keys.include?( key )
    end
  end

  read_keys = []
  keys.each() do |key|
    if elements[key]
      value = elements[key].text.to_s()
      type = elements[key].attribute( "type" ).to_s()
      if type == "array"
        hash[key] = value.split( "\n" )
      elsif ( type == "fixnum" )
        hash[key] = value.to_i()
      elsif ( type == "float" )
        hash[key] = value.to_f()
      elsif ( type == "trueclass" )
        hash[key] = true
      elsif ( type == "falseclass" )
        hash[key] = false
      else
        hash[key] = value
      end
      read_keys << key
    end
  end

  return (requested_keys - read_keys).empty?

end

.write(file, hash) ⇒ Object 



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# File 'lib/lyrics/utils/xmlhash.rb', line 23

def XMLHash.write( file, hash )

  begin
    read_file = nil
    read_file = file.is_a?( File ) ? file : File.new( file, "r" )
    root = REXML::Document.new( read_file ).root
  rescue Exception
    root = REXML::Document.new( "<?xml version='1.0' encoding='UTF-8' ?>" ).add_element( "settings" )
  ensure
    read_file.close() if read_file
  end

  begin
    write_file = nil
    if ( file.is_a?( File ) )
      file.reopen( file.path, "w+" )
      write_file = file
    else
      write_file = File.new( file, "w+" )
    end
    hash.each do |key, value|
      element = root.elements[key]
      element = root.add_element( key ) if ! element
      element.text = value.is_a?( Array ) ? value.join( "\n" ) : value.to_s()
      element.add_attribute( "type", value.class.name.downcase )
    end
    root.parent.write( write_file )
    write_file.flush()
    return true
  rescue Exception => e
    puts e
    puts e.backtrace
    return false
  ensure
    write_file.close() if write_file != file
  end

end