# REXML::SAX2Listener (Module)

In: | rexml/sax2listener.rb

A template for stream parser listeners. Note that the declarations (attlistdecl, elementdecl, etc) are trivially processed; REXML doesn’t yet handle doctype entity declarations, so you have to parse them out yourself.

### Missing methods from SAX2

     ignorable_whitespace

### Methods extending SAX2

`WARNING` These methods are certainly going to change, until DTDs are fully supported. Be aware of this.

     start_document
     end_document
     doctype
     elementdecl
     attlistdecl
     entitydecl
     notationdecl
     cdata
     xmldecl
     comment

## Methods

attlistdecl cdata characters comment doctype elementdecl end_document end_element end_prefix_mapping entitydecl notationdecl processing_instruction start_document start_element start_prefix_mapping xmldecl

## Public Instance methods

start_document()

[Source]

    # File rexml/sax2listener.rb, line 23
                    def start_document
                    end

end_document()

[Source]

    # File rexml/sax2listener.rb, line 25
                    def end_document
                    end

start_prefix_mapping(prefix, uri)

[Source]

    # File rexml/sax2listener.rb, line 27
                    def start_prefix_mapping prefix, uri
                    end

end_prefix_mapping(prefix)

[Source]

    # File rexml/sax2listener.rb, line 29
                    def end_prefix_mapping prefix
                    end

start_element(uri, localname, qname, attributes)

[Source]

    # File rexml/sax2listener.rb, line 31
                    def start_element uri, localname, qname, attributes
                    end

end_element(uri, localname, qname)

[Source]

    # File rexml/sax2listener.rb, line 33
                    def end_element uri, localname, qname
                    end

characters(text)

[Source]

    # File rexml/sax2listener.rb, line 35
                    def characters text
                    end

processing_instruction(target, data)

[Source]

    # File rexml/sax2listener.rb, line 37
                    def processing_instruction target, data
                    end

doctype(name, pub_sys, long_name, uri)

Handles a doctype declaration. Any attributes of the doctype which are not supplied will be nil. # EG, <!DOCTYPE me PUBLIC "foo" "bar"> @p name the name of the doctype; EG, "me" @p pub_sys "PUBLIC", "SYSTEM", or nil. EG, "PUBLIC" @p long_name the supplied long name, or nil. EG, "foo" @p uri the uri of the doctype, or nil. EG, "bar"

[Source]

    # File rexml/sax2listener.rb, line 45
                    def doctype name, pub_sys, long_name, uri
                    end

attlistdecl(element, pairs, contents)

If a doctype includes an ATTLIST declaration, it will cause this method to be called. The content is the declaration itself, unparsed. EG, <!ATTLIST el attr CDATA REQUIRED> will come to this method as "el attr CDATA REQUIRED". This is the same for all of the .*decl methods.

[Source]

    # File rexml/sax2listener.rb, line 52
                    def attlistdecl(element, pairs, contents)
                    end

elementdecl(content)

<!ELEMENT …>

[Source]

    # File rexml/sax2listener.rb, line 55
                    def elementdecl content
                    end

entitydecl(content)

<!ENTITY …> The argument passed to this method is an array of the entity declaration. It can be in a number of formats, but in general it returns (example, result):

     <!ENTITY % YN '"Yes"'>
     ["%", "YN", "'\"Yes\"'", "\""]
     <!ENTITY % YN 'Yes'>
     ["%", "YN", "'Yes'", "s"]
     <!ENTITY WhatHeSaid "He said %YN;">
     ["WhatHeSaid", "\"He said %YN;\"", "YN"]
     <!ENTITY open-hatch SYSTEM "http://www.textuality.com/boilerplate/OpenHatch.xml">
     ["open-hatch", "SYSTEM", "\"http://www.textuality.com/boilerplate/OpenHatch.xml\""]
     <!ENTITY open-hatch PUBLIC "-//Textuality//TEXT Standard open-hatch boilerplate//EN" "http://www.textuality.com/boilerplate/OpenHatch.xml">
     ["open-hatch", "PUBLIC", "\"-//Textuality//TEXT Standard open-hatch boilerplate//EN\"", "\"http://www.textuality.com/boilerplate/OpenHatch.xml\""]
     <!ENTITY hatch-pic SYSTEM "../grafix/OpenHatch.gif" NDATA gif>
     ["hatch-pic", "SYSTEM", "\"../grafix/OpenHatch.gif\"", "\n\t\t\t\t\t\t\tNDATA gif", "gif"]

[Source]

    # File rexml/sax2listener.rb, line 73
                    def entitydecl content
                    end

notationdecl(content)

<!NOTATION …>

[Source]

    # File rexml/sax2listener.rb, line 76
                    def notationdecl content
                    end

cdata(content)

Called when <![CDATA[ … ]]> is encountered in a document. @p content "…"

[Source]

    # File rexml/sax2listener.rb, line 80
                    def cdata content
                    end

xmldecl(version, encoding, standalone)

Called when an XML PI is encountered in the document. EG: <?xml version="1.0" encoding="utf"?> @p version the version attribute value. EG, "1.0" @p encoding the encoding attribute value, or nil. EG, "utf" @p standalone the standalone attribute value, or nil. EG, nil

[Source]

    # File rexml/sax2listener.rb, line 87
                    def xmldecl version, encoding, standalone
                    end

comment(comment)

Called when a comment is encountered. @p comment The content of the comment

[Source]

    # File rexml/sax2listener.rb, line 91
                    def comment comment
                    end

[Validate]