W3cubDocs

/Crystal

class XML::Node

Direct Known Subclasses

Defined in:

xml/node.cr
xml/node/type.cr

Constant Summary

LOOKS_LIKE_XPATH = /^(\.\/|\/|\.\.|\.$)/

Instance Method Summary

Instance methods inherited from class Reference

==(other : self)
==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==, dup dup, hash(hasher) hash, initialize initialize, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference) : Bool
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Constructor methods inherited from class Reference

new new, unsafe_construct(address : Pointer, *args, **opts) : self unsafe_construct

Class methods inherited from class Reference

pre_initialize(address : Pointer) pre_initialize

Instance methods inherited from class Object

! : Bool !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as

Class methods inherited from class Object

from_json(string_or_io : String | IO, root : String)
from_json(string_or_io : String | IO) from_json, from_yaml(string_or_io : String | IO) from_yaml

Macros inherited from class Object

class_getter(*names, &block) class_getter, class_getter!(*names) class_getter!, class_getter?(*names, &block) class_getter?, class_property(*names, &block) class_property, class_property!(*names) class_property!, class_property?(*names, &block) class_property?, class_setter(*names) class_setter, def_clone def_clone, def_equals(*fields) def_equals, def_equals_and_hash(*fields) def_equals_and_hash, def_hash(*fields) def_hash, delegate(*methods, to object) delegate, forward_missing_to(delegate) forward_missing_to, getter(*names, &block) getter, getter!(*names) getter!, getter?(*names, &block) getter?, property(*names, &block) property, property!(*names) property!, property?(*names, &block) property?, setter(*names) setter

Instance Method Detail

def ==(other : Node)Source

Compares with other.

def [](attribute : String) : StringSource

Gets the attribute content for the attribute given by name. Raises KeyError if attribute is not found.

def []=(name : String, value)Source

Sets attribute of this node to value. Raises XML::Error if this node does not support attributes.

def []?(attribute : String) : String | NilSource

Gets the attribute content for the attribute given by name. Returns nil if attribute is not found.

def attribute? : BoolSource

Returns true if this is an attribute node.

def attributes : XML::AttributesSource

Returns attributes of this node as an XML::Attributes.

def cdata? : BoolSource

Returns true if this is a CDATA section node.

def children : XML::NodeSetSource

Gets the list of children for this node as a XML::NodeSet.

def comment?Source

Returns true if this is a comment node.

def content : StringSource

Returns the content for this Node. An empty string is returned if the node has no content.

def content=(content)Source

Sets the Node's content to a Text node containing string. The string gets XML escaped, not interpreted as markup.

def delete(name : String) : String | NilSource

Deletes attribute given by name. Returns attributes value, or nil if attribute not found.

def document : DocumentSource

Gets the document for this node.

def document? : BoolSource

Returns true if this is a Document or HTML Document node.

def element? : BoolSource

Returns true if this is an Element node.

def encoding : String | NilSource

Returns the encoding of this node's document.

def errors : Array(XML::Error) | NilSource

DEPRECATED Use XML::Document#errors instead.

def first_element_child : XML::Node | NilSource

Returns the first child node of this node that is an element. Returns nil if not found.

def fragment? : BoolSource

Returns true if this is a DocumentFragment.

def hash(hasher)Source

See Object#hash(hasher)

def inner_text : StringSource

Returns the content for this Node.

def inspect(io : IO) : NilSource

Returns detailed information for this node including node type, name, attributes and children.

def name : StringSource

Returns the name for this Node.

def name=(name)Source

Sets the name for this Node.

def namespace : Namespace | NilSource

Returns the namespace for this node or nil if not found.

def namespace_definitions : Array(Namespace)Source

Returns namespaces defined on this node directly.

def namespace_scopes : Array(Namespace)Source

Returns namespaces in scope for this node – those defined on this node directly or any ancestor node – as an Array of XML::Namespace objects.

Default namespaces ("xmlns=" style) for this node are included in this array; default namespaces for ancestors, however, are not.

See also #namespaces

def namespaces : Hash(String, String | Nil)Source

Returns a Hash(String, String?) of prefix => href for all namespaces on this node and its ancestors.

This method returns the same namespaces as #namespace_scopes.

Returns namespaces in scope for this node – those defined on this node directly or any ancestor node – as a Hash of attribute-name/value pairs.

NOTE Note that the keys in this hash XML attributes that would be used to define this namespace, such as "xmlns:prefix", not just the prefix.

def next : XML::Node | NilSource

Returns the next sibling node or nil if not found.

def next_element : XML::Node | NilSource

Returns the next element node sibling or nil if not found.

def next_sibling : XML::Node | NilSource

Returns the next sibling node or nil if not found.

def object_id : UInt64Source

Returns the address of underlying LibXML::Node* in memory.

def parent : XML::Node | NilSource

Returns the parent node or nil if not found.

def pretty_print(pp : PrettyPrint) : NilSource

Description copied from class Object

Pretty prints self into the given printer.

By default appends a text that is the result of invoking #inspect on self. Subclasses should override for custom pretty printing.

def previous : XML::Node | NilSource

Returns the previous sibling node or nil if not found.

def previous_element : XML::Node | NilSource

Returns the previous sibling node that is an element or nil if not found.

def previous_sibling : XML::Node | NilSource

Returns the previous sibling node or nil if not found. Same with #previous.

def processing_instruction?Source

Returns true if this is a Processing Instruction node.

def root : XML::Node | NilSource

Returns the root node for this document or nil.

def text : StringSource

Same as #content.

def text=(text)Source

Same as #content=.

def text? : BoolSource

Returns true if this is a Text node.

def to_s(io : IO) : NilSource

Serialize this Node as XML to io using default options.

See #to_xml.

def to_xml(indent : Int = 2, indent_text = " ", options : SaveOptions = SaveOptions.xml_default) : StringSource

Serialize this Node as XML and return a String using default options.

See XML::SaveOptions.xml_default for default options.

def to_xml(io : IO, indent = 2, indent_text = " ", options : SaveOptions = SaveOptions.xml_default)Source

Serialize this Node as XML to io using default options.

See XML::SaveOptions.xml_default for default options.

def type : XML::Node::TypeSource

Returns the type for this Node as XML::Node::Type.

def unlink : NilSource

Removes the node from the XML document.

def version : String | NilSource

Returns the version of this node's document.

def xml?Source

Returns true if this is an xml Document node.

def xpath(path, namespaces = nil, variables = nil)Source

Searches this node for XPath path. Returns result with appropriate type (Bool | Float64 | String | XML::NodeSet).

Raises XML::Error on evaluation error.

def xpath_bool(path, namespaces = nil, variables = nil)Source

Searches this node for XPath path and restricts the return type to Bool.

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_bool("count(//person) > 0") # => true

def xpath_float(path, namespaces = nil, variables = nil)Source

Searches this node for XPath path and restricts the return type to Float64.

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_float("count(//person)") # => 1.0

def xpath_node(path, namespaces = nil, variables = nil)Source

Searches this node for XPath path for nodes and returns the first one. or nil if not found

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_node("//person")  # => #<XML::Node:0x2013e80 name="person">
doc.xpath_node("//invalid") # => nil

def xpath_nodes(path, namespaces = nil, variables = nil)Source

Searches this node for XPath path and restricts the return type to NodeSet.

require "xml"

doc = XML.parse("<person></person>")

nodes = doc.xpath_nodes("//person")
nodes.class       # => XML::NodeSet
nodes.map(&.name) # => ["person"]

def xpath_string(path, namespaces = nil, variables = nil)Source

Searches this node for XPath path and restricts the return type to String.

require "xml"

doc = XML.parse("<person></person>")

doc.xpath_string("string(/persons/person[1])")

© 2012–2026 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/1.19.0/XML/Node.html