Class: REXML::Document

new( source = nil, context = {} )

Constructor @param source if supplied, must be a Document, String, or IO. Documents have their context and Element attributes cloned. Strings are expected to be valid XML documents. IOs are expected to be sources of valid XML documents. @param context if supplied, contains the context of the document; this should be a Hash.

[Source]

# File rexml/document.rb, line 34
                def initialize( source = nil, context = {} )
                        super()
                        @context = context
                        return if source.nil?
                        if source.kind_of? Document
                                @context = source.context
                                super source
                        else
                                build(  source )
                        end
                end

parse_stream( source, listener )

[Source]

# File rexml/document.rb, line 199
                def Document::parse_stream( source, listener )
                        Parsers::StreamParser.new( source, listener ).parse
                end

<<( child )

Alias for add

add( child )

We override this, because XMLDecls and DocTypes must go at the start of the document

[Source]

# File rexml/document.rb, line 66
                def add( child )
                        if child.kind_of? XMLDecl
                                @children.unshift child
        child.parent = self
                        elsif child.kind_of? DocType
        # Find first Element or DocType node and insert the decl right 
        # before it.  If there is no such node, just insert the child at the
        # end.  If there is a child and it is an DocType, then replace it.
        insert_before_index = 0
        @children.find { |x| 
          insert_before_index += 1
          x.kind_of?(Element) || x.kind_of?(DocType)
        }
        if @children[ insert_before_index ] # Not null = not end of list
          if @children[ insert_before_index ].kind_of DocType
            @children[ insert_before_index ] = child
          else
            @children[ index_before_index-1, 0 ] = child
          end
        else  # Insert at end of list
          @children[insert_before_index] = child
        end
                                child.parent = self
                        else
                                rv = super
                                raise "attempted adding second root element to document" if @elements.size > 1
                                rv
                        end
                end

add_element(arg=nil, arg2=nil)

[Source]

# File rexml/document.rb, line 97
                def add_element(arg=nil, arg2=nil)
                        rv = super
                        raise "attempted adding second root element to document" if @elements.size > 1
                        rv
                end

clone()

Should be obvious

[Source]

# File rexml/document.rb, line 51
                def clone
                        Document.new self
                end

doctype()

@return the DocType child of the document, if one exists, and nil otherwise.

[Source]

# File rexml/document.rb, line 113
                def doctype
                        @children.find { |item| item.kind_of? DocType }
                end

encoding()

@return the XMLDecl encoding of this document as a String. If no XMLDecl has been set, returns the default encoding.

[Source]

# File rexml/document.rb, line 133
                def encoding
                        xml_decl().encoding
                end

expanded_name()

According to the XML spec, a root node has no expanded name

[Source]

# File rexml/document.rb, line 56
                def expanded_name
                        ''
                        #d = doc_type
                        #d ? d.name : "UNDEFINED"
                end

name()

Alias for expanded_name

node_type()

[Source]

# File rexml/document.rb, line 46
    def node_type
      :document
    end

root()

@return the root Element of the document, or nil if this document has no children.

[Source]

# File rexml/document.rb, line 105
                def root
      elements[1]
      #self
      #@children.find { |item| item.kind_of? Element }
                end

stand_alone?()

@return the XMLDecl standalone value of this document as a String. If no XMLDecl has been set, returns the default setting.

[Source]

# File rexml/document.rb, line 139
                def stand_alone?
                        xml_decl().stand_alone?
                end

version()

@return the XMLDecl version of this document as a String. If no XMLDecl has been set, returns the default version.

[Source]

# File rexml/document.rb, line 127
                def version
                        xml_decl().version
                end

write( output=$stdout, indent=-1, trans=false, ie_hack=false )

Write the XML tree out, optionally with indent. This writes out the entire XML document, including XML declarations, doctype declarations, and processing instructions (if any are given).

A controversial point is whether Document should always write the XML declaration (<?xml version=‘1.0’?>) whether or not one is given by the user (or source document). REXML does not write one if one was not specified, because it adds unneccessary bandwidth to applications such as XML-RPC.

See also the classes in the rexml/formatters package for the proper way to change the default formatting of XML output

Examples

  Document.new("<a><b/></a>").serialize

  output_string = ""
  tr = Transitive.new( output_string )
  Document.new("<a><b/></a>").serialize( tr )

output:

output an object which supports ’<< string’; this is where the

  document will be written.

indent:	An integer. If -1, no indenting will be used; otherwise, the indentation will be twice this number of spaces, and children will be indented an additional amount. For a value of 3, every item will be indented 3 more levels, or 6 more spaces (2 * 3). Defaults to -1
trans:	If transitive is true and indent is >= 0, then the output will be pretty-printed in such a way that the added whitespace does not affect the absolute value of the document — that is, it leaves the value and number of Text nodes in the document unchanged.
ie_hack:	Internet Explorer is the worst piece of crap to have ever been written, with the possible exception of Windows itself. Since IE is unable to parse proper XML, we have to provide a hack to generate XML that IE‘s limited abilities can handle. This hack inserts a space before the /> on empty tags. Defaults to false

[Source]

# File rexml/document.rb, line 182
                def write( output=$stdout, indent=-1, trans=false, ie_hack=false )
      if xml_decl.encoding != "UTF-8" && !output.kind_of?(Output)
        output = Output.new( output, xml_decl.encoding )
      end
      formatter = if indent > -1
          if trans
            REXML::Formatters::Transitive.new( indent, ie_hack )
          else
            REXML::Formatters::Pretty.new( indent, ie_hack )
          end
        else
          REXML::Formatters::Default.new( ie_hack )
        end
      formatter.write( self, output )
                end

xml_decl()

@return the XMLDecl of this document; if no XMLDecl has been set, the default declaration is returned.

[Source]

# File rexml/document.rb, line 119
                def xml_decl
                        rv = @children[0]
      return rv if rv.kind_of? XMLDecl
      rv = @children.unshift(XMLDecl.default)[0]
                end

Methods

Constants

Public Class methods

Public Instance methods