Class: Jing

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

Constant Summary collapse

VERSION = 
"0.0.3"
DEFAULT_JAR = 
File.join(File.dirname(__FILE__), "jing-20091111.jar")
Error = 
Class.new(StandardError)
ExecutionError = 
Class.new(Error)
OptionError = 
Class.new(Error)
@@option_builder = 
Optout.options do
  on :java,     :required => true, :default => "java"
  on :java_opts,        String
  on :jar,      "-jar", Optout::File.exists, :default => DEFAULT_JAR
  on :compact,  "-c",   Optout::Boolean
  on :encoding, "-e",   String
  on :id_check, "-i",   Optout::Boolean,     :default  => false
  on :schema,           Optout::File.exists, :required => true
  on :xmlfile,          Optout::File.exists, :required => true
end

Instance Method Summary collapse

Constructor Details

#initialize(schema, options = nil) ⇒ Jing

Cretae an instance to validate against the given schema. The schema can be in the XML or compact syntax.

jing = Jing.new("schema.rng", options)

Arguments

[schema (String)] Path to the schema [options (Hash)] Jing options, optional

Options

[:java (String)] Name and/or location of the java executable. Defaults to "java". [:jar (String)] Path to the Jing JAR file. Defaults to the bundled JAR. [:compact (Boolean)] Set to true if the schema uses the RELAX NG compact syntax. Defaults to false, will be set to true is the schema has a .rnc extension. [:encoding (String)] Encoding of the XML document. [:id_check (Boolean)] Disable checking of ID/IDREF/IDREFS. Defaults to false

Errors

[ArgumentError] If the options are not nil or a Hash.



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# File 'lib/jing.rb', line 44

def initialize(schema, options = nil)
  if options
    raise ArgumentError, "options must be a Hash" unless Hash === options
    @options = options.dup
  end

  @options ||= {}
  @options[:schema] = schema
  @options[:compact] = true if @options[:compact].nil? and @options[:schema] =~ /\.rnc\Z/i   # Don't override an explicit setting
  # Optout quirk: true will *include* the switch, which means we *don't* want to check
  @options[:id_check] = !@options[:id_check] if @options.include?(:id_check)
  if @options[:encoding]
    @options[:java_opts] = "-Dfile.encoding=#{@options[:encoding]}"
  end
end

Instance Method Details

#valid?(xml) ⇒ Boolean

Validate an XML document against the schema. To receive a list of validation errors use #validate.

puts "yay!" if jing.valid?("doc.xml")

Arguments

[xml (String)] Path to the XML file

Errors

Same as #validate

Returns

[Boolean] true if valid, false if invalid

Returns:

  • (Boolean) 


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# File 'lib/jing.rb', line 113

def valid?(xml)
  errors = validate(xml)
  errors.none?
end

#validate(xml) ⇒ Object

Validate an XML document against the schema.

errors = jing.validate("doc.xml")

Arguments

[xml (String)] Path to the XML file

Errors

[Jing::OptionError] A Jing option was invalid. Note that this does not apply to an invalid :java option. [Jing::ExecutionError] Problems were encountered trying to execute Jing.

Returns

[Array] The errors, each element is a Hash. See Error Hash for more info.

Error Hash

The error hash contains the following keys/values

[:source (String)] File containing the error, can be the schema or the instance XML. [:line (Fixnum)] Line number [:column (Fixnum)] Column number [:message (String)] The problem



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# File 'lib/jing.rb', line 87

def validate(xml)
  @options[:xmlfile] = xml

  out = execute(@options)
  return [] if $?.success? and out.empty?

  parse_output(out)
end