Module: XapianDb::Utilities

Instance Method Summary collapse

Instance Method Details

#assert_valid_keys(hash, *valid_keys) ⇒ Object

Taken from Rails

Raises:

  • (ArgumentError)

45
46
47
48
# File 'lib/xapian_db/utilities.rb', line 45

def assert_valid_keys(hash, *valid_keys)
  unknown_keys = hash.keys - [valid_keys].flatten
  raise(ArgumentError, "Unsupported option(s) detected: #{unknown_keys.join(", ")}") unless unknown_keys.empty?
end

#camelize(string) ⇒ String

Convert a string to camel case


13
14
15
# File 'lib/xapian_db/utilities.rb', line 13

def camelize(string)
  string.split(/[^a-z0-9]/i).map{|w| w.capitalize}.join
end

#constantize(camel_cased_word) ⇒ Object

Taken from Rails


18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
# File 'lib/xapian_db/utilities.rb', line 18

def constantize(camel_cased_word)
  names = camel_cased_word.split('::')
  names.shift if names.empty? || names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      # Go down the ancestors to check it it's owned
      # directly before we reach Object or the end of ancestors.
      constant = constant.ancestors.inject do |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
        const
      end

      # owner is in Object, so raise
      constant.const_get(name, false)
    end
  end
end