Class: Saxon::XDM::Value

Inherits:
Object
  • Object
show all
Includes:
Enumerable, SequenceLike
Defined in:
lib/saxon/xdm/value.rb

Overview

An XPath Data Model Value object, representing a Sequence.

Class Method Summary collapse

Instance Method Summary collapse

Methods included from SequenceLike

#append

Constructor Details

#initialize(s9_xdm_value) ⇒ Value

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Value.



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# File 'lib/saxon/xdm/value.rb', line 66

def initialize(s9_xdm_value)
  @s9_xdm_value = s9_xdm_value
end

Class Method Details

.create(*items) ⇒ Saxon::XDM::Value

Create a new XDM::Value sequence containing the items passed in as a Ruby enumerable.

Parameters:

  • items (Enumerable) —

    A list of members

Returns:



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# File 'lib/saxon/xdm/value.rb', line 16

def create(*items)
  items = items.flatten
  case items.size
  when 0
    XDM.EmptySequence()
  when 1
    if existing_value = maybe_xdm_value(items.first)
      return existing_value
    end
    XDM.Item(items.first)
  else
    new(Saxon::S9API::XdmValue.new(wrap_items(items)))
  end
end

Instance Method Details

#==(other) ⇒ Boolean Also known as: eql?

Compare this XDM::Value with another. Currently this requires iterating across the sequence, and the other sequence and comparing each member with the corresponding member in the other sequence.

Parameters:

Returns:

  • (Boolean) —

    whether the two XDM::Values are equal



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# File 'lib/saxon/xdm/value.rb', line 98

def ==(other)
  return false unless other.is_a?(XDM::Value)
  return false unless other.size == size
  not_okay = to_enum.zip(other.to_enum).find { |mine, theirs|
    mine != theirs
  }
  not_okay.nil? || !not_okay
end

# {|item| ... } ⇒ Object

Calls the given block once for each Item in the sequence, passing that item as a parameter. Returns the value itself.

If no block is given, an Enumerator is returned.

Yields:

  • (item) —

    The current XDM Item

Yield Parameters:



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# File 'lib/saxon/xdm/value.rb', line 83

def each(&block)
  to_enum.each(&block)
end

#hash ⇒ Fixnum

The hash code for the XDM::Value

Returns:

  • (Fixnum) —

    The hash code



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# File 'lib/saxon/xdm/value.rb', line 111

def hash
  @hash ||= to_a.hash
end

#sequence_enum ⇒ Object 



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# File 'lib/saxon/xdm/value.rb', line 125

def sequence_enum
  to_enum
end

#sequence_size ⇒ Object 



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# File 'lib/saxon/xdm/value.rb', line 129

def sequence_size
  s9_xdm_value.size
end

#size ⇒ Fixnum

Returns The size of the sequence.

Returns:

  • (Fixnum) —

    The size of the sequence



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# File 'lib/saxon/xdm/value.rb', line 71

def size
  s9_xdm_value.size
end

#to_enum ⇒ Enumerator::Lazy Also known as: enum_for

Returns a lazy Enumerator over the sequence

Returns:

  • (Enumerator::Lazy) —

    the enumerator



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# File 'lib/saxon/xdm/value.rb', line 117

def to_enum
  s9_xdm_value.enum_for(:each).lazy.map { |s9_xdm_item|
    XDM.Item(s9_xdm_item)
  }.each
end

#to_java ⇒ Saxon::S9API::XdmValue

Returns The underlying Saxon Java XDM valuee object.

Returns:

  • (Saxon::S9API::XdmValue) —

    The underlying Saxon Java XDM valuee object.



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# File 'lib/saxon/xdm/value.rb', line 88

def to_java
  @s9_xdm_value
end