Class: REXML::Parent

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses: DocType, Document, Element
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, Child
Instance Chain: self, Enumerable, Child, Node
Inherits:	REXML::Child ::Object REXML::Child REXML::Parent
Defined in:	lib/rexml/parent.rb

Overview

A parent has children, and has methods for accessing them. The Parent class is never encountered except as the superclass for some other object.

Class Method Summary

.new(parent = nil) ⇒ Parent constructor

Constructor.

Child - Inherited

.new	Constructor.

Instance Attribute Summary

#parent? ⇒ Boolean readonly

Child - Inherited

#next_sibling	Alias for Node#next_sibling_node.
#next_sibling=	Sets the next sibling of this child.
#parent	The Parent of this object.
#parent=	Sets the parent of this child to the supplied argument.
#previous_sibling	Alias for Node#previous_sibling_node.
#previous_sibling=	Sets the previous sibling of this child.

Node - Included

#parent?

Instance Method Summary

#<<(object)

Alias for #push.
#[](index)

Fetches a child at a given index.
#[]=(*args) ⇒ Object

Set an index entry.
#add(object) (also: #push)
#children

Alias for #to_a.
#deep_clone

Deeply clones this object.
#delete(object)
#delete_at(index)
#delete_if(&block)
#each(&block) (also: #each_child)
#each_child(&block)

Alias for #each.
#each_index(&block)
#index(child) ⇒ Object

Fetches the index of a given child of this parent.
#insert_after(child1, child2) ⇒ Object

Inserts an child after another child child2 will be inserted after child1 in the child list of the parent.
#insert_before(child1, child2) ⇒ Object

Inserts an child before another child child2 will be inserted before child1 in the child list of the parent.
#length

Alias for #size.
#push(object) (also: #<<)

Alias for #add.
#replace_child(to_replace, replacement)

Replaces one child with another, making sure the nodelist is correct Child).
#size ⇒ Object (also: #length)
#to_a (also: #children)
#unshift(object)

Child - Inherited

#bytes	This doesn't yet handle encodings.
#document	Returns the document this child belongs to, or nil if this child belongs to no document.
#remove	Removes this child from the parent.
#replace_with	Replaces this object with another object.

Node - Included

#each_recursive	Visit all subnodes of `self` recursively.
#find_first_recursive	Find (and return) first subnode (recursively) for which the block evaluates to true.
#indent,
#index_in_parent	Returns the position that `self` holds in its parent's array, indexed from 1.
#next_sibling_node, #previous_sibling_node,
#to_s	indent

Constructor Details

.new(parent = nil) ⇒ `Parent`

Constructor

Parameters:

parent (defaults to: nil) —

if supplied, will be set as the parent of this object

[ GitHub ]

# File 'lib/rexml/parent.rb', line 13


def initialize parent=nil
  super(parent)
  @children = []
end

Instance Attribute Details

#parent? ⇒ `Boolean` (readonly)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 162


def parent?
  true
end

Instance Method Details

#<<(object)

Alias for #push.

[ GitHub ]

# File 'lib/rexml/parent.rb', line 25


alias :<< :push

#[](index)

Fetches a child at a given index

Parameters:

index —

the Integer index of the child to fetch

[ GitHub ]

# File 'lib/rexml/parent.rb', line 57


def []( index )
  @children[index]
end

#[]=(*args) ⇒ Object

Set an index entry. See Array.[]=

Parameters:

index —

the index of the element to set
opt —

either the object to set, or an Integer length
child —

if opt is an Integer, this is the child to set

Returns:

the parent (self)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 70


def []=( *args )
  args[-1].parent = self
  @children[*args[0..-2]] = args[-1]
end

#add(object) Also known as: #push

[ GitHub ]

# File 'lib/rexml/parent.rb', line 18


def add( object )
  object.parent = self
  @children << object
  object
end

#children

Alias for #to_a.

[ GitHub ]

# File 'lib/rexml/parent.rb', line 160


alias :children :to_a

#deep_clone

Deeply clones this object. This creates a complete duplicate of this Parent, including all descendants.

[ GitHub ]

# File 'lib/rexml/parent.rb', line 148


def deep_clone
  cl = clone()
  each do |child|
    if child.kind_of? Parent
      cl << child.deep_clone
    else
      cl << child.clone
    end
  end
  cl
end

#delete(object)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 32


def delete( object )
  found = false
  @children.delete_if {|c| c.equal?(object) and found = true }
  object.parent = nil if found
  found ? object : nil
end

#delete_at(index)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 47


def delete_at( index )
  @children.delete_at index
end

#delete_if(&block)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 43


def delete_if( &block )
  @children.delete_if(&block)
end

#each(&block) Also known as: #each_child

[ GitHub ]

# File 'lib/rexml/parent.rb', line 39


def each(&block)
  @children.each(&block)
end

#each_child(&block)

Alias for #each.

[ GitHub ]

# File 'lib/rexml/parent.rb', line 61


alias :each_child :each

#each_index(&block)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 51


def each_index( &block )
  @children.each_index(&block)
end

#index(child) ⇒ Object

Fetches the index of a given child of this parent.

Parameters:

child —

the child to get the index of

Returns:

the index of the child, or nil if the object is not a child

[ GitHub ]

# File 'lib/rexml/parent.rb', line 123


def index( child )
  count = -1
  @children.find { |i| count += 1 ; i.hash == child.hash }
  count
end

#insert_after(child1, child2) ⇒ Object

Inserts an child after another child child2 will be inserted after child1 in the child list of the parent. If an xpath, child2 will be inserted after the first child to match the xpath.

Parameters:

child1 —

this is either an xpath or an Element. If an Element,
child2 —

the child to insert

Returns:

the parent (self)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 102


def insert_after( child1, child2 )
  if child1.kind_of? String
    child1 = XPath.first( self, child1 )
    child1.parent.insert_after child1, child2
  else
    ind = index(child1)+1
    child2.parent.delete(child2) if child2.parent
    @children[ind,0] = child2
    child2.parent = self
  end
  self
end

#insert_before(child1, child2) ⇒ Object

Inserts an child before another child child2 will be inserted before child1 in the child list of the parent. If an xpath, child2 will be inserted before the first child to match the xpath.

Parameters:

child1 —

this is either an xpath or an Element. If an Element,
child2 —

the child to insert

Returns:

the parent (self)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 82


def insert_before( child1, child2 )
  if child1.kind_of? String
    child1 = XPath.first( self, child1 )
    child1.parent.insert_before child1, child2
  else
    ind = index(child1)
    child2.parent.delete(child2) if child2.parent
    @children[ind,0] = child2
    child2.parent = self
  end
  self
end

#length

Alias for #size.

[ GitHub ]

# File 'lib/rexml/parent.rb', line 134


alias :length :size

#push(object) Also known as: #<<

Alias for #add.

[ GitHub ]

# File 'lib/rexml/parent.rb', line 24


alias :push :add

#replace_child(to_replace, replacement)

Replaces one child with another, making sure the nodelist is correct Child)

Parameters:

to_replace —

the child to replace (must be a Child)
replacement —

the child to insert into the nodelist (must be a

[ GitHub ]

# File 'lib/rexml/parent.rb', line 140


def replace_child( to_replace, replacement )
  @children.map! {|c| c.equal?( to_replace ) ? replacement : c }
  to_replace.parent = nil
  replacement.parent = self
end

#size ⇒ Object Also known as: #length

Returns:

the number of children of this parent

[ GitHub ]

# File 'lib/rexml/parent.rb', line 130


def size
  @children.size
end

#to_a Also known as: #children

[ GitHub ]

# File 'lib/rexml/parent.rb', line 115


def to_a
  @children.dup
end

#unshift(object)

[ GitHub ]

# File 'lib/rexml/parent.rb', line 27


def unshift( object )
  object.parent = self
  @children.unshift object
end

Class: REXML::Parent

Overview

Class Method Summary

Child - Inherited

Instance Attribute Summary

Child - Inherited

Node - Included

Instance Method Summary

Child - Inherited

Node - Included

Constructor Details

.new(parent = nil) ⇒ Parent

Instance Attribute Details

#parent? ⇒ Boolean (readonly)

Instance Method Details

#<<(object)

#[](index)

#[]=(*args) ⇒ Object

#add(object) Also known as: #push

#children

#deep_clone

#delete(object)

#delete_at(index)

#delete_if(&block)

#each(&block) Also known as: #each_child

#each_child(&block)

#each_index(&block)

#index(child) ⇒ Object

#insert_after(child1, child2) ⇒ Object

#insert_before(child1, child2) ⇒ Object

#length

#push(object) Also known as: #<<

#replace_child(to_replace, replacement)

#size ⇒ Object Also known as: #length

#to_a Also known as: #children

#unshift(object)

.new(parent = nil) ⇒ `Parent`

#parent? ⇒ `Boolean` (readonly)