Class: CFPropertyList::List

Inherits:
Object
  • Object
show all
Defined in:
lib/rbCFPropertyList.rb

Overview

Class representing a CFPropertyList. Instanciate with #new

Constant Summary collapse

FORMAT_BINARY =

Format constant for binary format

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FORMAT_XML =

Format constant for XML format

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FORMAT_AUTO =

Format constant for automatic format recognizing

0
@@parsers = 
[Binary, CFPropertyList.xml_parser_interface]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ List

initialize a new CFPropertyList, arguments are:

:file

Parse a file

:format

Format is one of FORMAT_BINARY or FORMAT_XML. Defaults to FORMAT_AUTO

:data

Parse a string

All arguments are optional



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# File 'lib/rbCFPropertyList.rb', line 244

def initialize(opts={})
  @filename = opts[:file]
  @format = opts[:format] || FORMAT_AUTO
  @data = opts[:data]
  @formatted = opts[:formatted]

  load(@filename) unless @filename.nil?
  load_str(@data) unless @data.nil?
end

Instance Attribute Details

#filename ⇒ Object

Path of PropertyList



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# File 'lib/rbCFPropertyList.rb', line 229

def filename
  @filename
end

#format ⇒ Object

the original format of the PropertyList



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# File 'lib/rbCFPropertyList.rb', line 231

def format
  @format
end

#formatted ⇒ Object

default value for XML generation; if true generate formatted XML



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# File 'lib/rbCFPropertyList.rb', line 235

def formatted
  @formatted
end

#value ⇒ Object

the root value in the plist file



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# File 'lib/rbCFPropertyList.rb', line 233

def value
  @value
end

Class Method Details

.parsers ⇒ Object

returns a list of registered parsers



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# File 'lib/rbCFPropertyList.rb', line 255

def self.parsers
  @@parsers
end

.parsers=(val) ⇒ Object

set a list of parsers



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# File 'lib/rbCFPropertyList.rb', line 260

def self.parsers=(val)
  @@parsers = val
end

Instance Method Details

#load(file = nil, format = nil) ⇒ Object

Read a plist file

file = nil

The filename of the file to read. If nil, use filename instance variable

format = nil

The format of the plist file. Auto-detect if nil

Raises:

  • (IOError) 


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# File 'lib/rbCFPropertyList.rb', line 322

def load(file=nil,format=nil)
  file = @filename if file.nil?
  format = @format if format.nil?
  @value = {}

  raise IOError.new("File #{file} not readable!") unless File.readable? file

  case format
  when List::FORMAT_BINARY, List::FORMAT_XML then
    prsr = @@parsers[format-1].new
    @value = prsr.load({:file => file})

  when List::FORMAT_AUTO then # what we now do is ugly, but neccessary to recognize the file format
    magic_number = IO.read(file,8)
    raise IOError.new("File #{file} is empty.") unless magic_number
    filetype = magic_number[0..5]
    version = magic_number[6..7]

    prsr = nil
    if filetype == "bplist" then
      raise CFFormatError.new("Wong file version #{version}") unless version == "00"
      prsr = Binary.new
      @format = List::FORMAT_BINARY
    else
      prsr = CFPropertyList.xml_parser_interface.new
      @format = List::FORMAT_XML
    end

    @value = prsr.load({:file => file})
  end

  raise CFFormatError.new("Invalid format or parser error!") if @value.nil?
end

#load_binary(filename = nil) ⇒ Object

read a binary plist file

filename = nil

The filename to read from; if nil, read from the file defined by instance variable filename



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# File 'lib/rbCFPropertyList.rb', line 272

def load_binary(filename=nil)
  load(filename,List::FORMAT_BINARY)
end

#load_binary_str(str = nil) ⇒ Object

load a plist from a binary string

str

The string containing the plist



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# File 'lib/rbCFPropertyList.rb', line 284

def load_binary_str(str=nil)
  load_str(str,List::FORMAT_BINARY)
end

#load_str(str = nil, format = nil) ⇒ Object

load a plist from a string

str = nil

The string containing the plist

format = nil

The format of the plist



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# File 'lib/rbCFPropertyList.rb', line 291

def load_str(str=nil,format=nil)
  str = @data if str.nil?
  format = @format if format.nil?

  @value = {}
  case format
  when List::FORMAT_BINARY, List::FORMAT_XML then
    prsr = @@parsers[format-1].new
    @value = prsr.load({:data => str})

  when List::FORMAT_AUTO then # what we now do is ugly, but neccessary to recognize the file format
    filetype = str[0..5]
    version = str[6..7]

    prsr = nil
    if filetype == "bplist" then
      raise CFFormatError.new("Wrong file version #{version}") unless version == "00"
      prsr = Binary.new
      @format = List::FORMAT_BINARY
    else
      prsr = CFPropertyList.xml_parser_interface.new
      @format = List::FORMAT_XML
    end

    @value = prsr.load({:data => str})
  end
end

#load_xml(filename = nil) ⇒ Object

Load an XML PropertyList

filename = nil

The filename to read from; if nil, read from the file defined by instance variable filename



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# File 'lib/rbCFPropertyList.rb', line 266

def load_xml(filename=nil)
  load(filename,List::FORMAT_XML)
end

#load_xml_str(str = nil) ⇒ Object

load a plist from a XML string

str

The string containing the plist



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# File 'lib/rbCFPropertyList.rb', line 278

def load_xml_str(str=nil)
  load_str(str,List::FORMAT_XML)
end

#save(file = nil, format = nil, opts = {}) ⇒ Object

Serialize CFPropertyList object to specified format and write it to file

file = nil

The filename of the file to write to. Uses filename instance variable if nil

format = nil

The format to save in. Uses format instance variable if nil

Raises:



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# File 'lib/rbCFPropertyList.rb', line 359

def save(file=nil,format=nil,opts={})
  format = @format if format.nil?
  file = @filename if file.nil?

  raise CFFormatError.new("Format #{format} not supported, use List::FORMAT_BINARY or List::FORMAT_XML") if format != FORMAT_BINARY && format != FORMAT_XML

  if(!File.exists?(file)) then
    raise IOError.new("File #{file} not writable!") unless File.writable?(File.dirname(file))
  elsif(!File.writable?(file)) then
    raise IOError.new("File #{file} not writable!")
  end

  opts[:root] = @value
  opts[:formatted] = @formatted unless opts.has_key?(:formatted)

  prsr = @@parsers[format-1].new

  content = prsr.to_str(opts)

  File.open(file, 'wb') {
    |fd|
    fd.write content
  }
end

#to_str(format = List::FORMAT_BINARY, opts = {}) ⇒ Object

convert plist to string

format = List::FORMAT_BINARY

The format to save the plist

opts={}

Pass parser options

Raises:



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# File 'lib/rbCFPropertyList.rb', line 387

def to_str(format=List::FORMAT_BINARY,opts={})
  raise CFFormatError.new("Format #{format} not supported, use List::FORMAT_BINARY or List::FORMAT_XML") if format != FORMAT_BINARY && format != FORMAT_XML

  prsr = @@parsers[format-1].new

  opts[:root] = @value
  opts[:formatted] = @formatted unless opts.has_key?(:formatted)

  return prsr.to_str(opts)
end