Class | REXML::Parsers::PullParser |
In: |
rexml/parsers/pullparser.rb
|
Parent: | Object |
This API is experimental, and subject to change.
parser = PullParser.new( "<a>text<b att='val'/>txet</a>" ) while parser.has_next? res = parser.next puts res[1]['att'] if res.start_tag? and res[0] == 'b' end
See the PullEvent class for information on the content of the results. The data is identical to the arguments passed for the various events to the StreamListener API.
Notice that:
parser = PullParser.new( "<a>BAD DOCUMENT" ) while parser.has_next? res = parser.next raise res[1] if res.error? end
Nat Price gave me some good ideas for the API.
# File rexml/parsers/pullparser.rb, line 36 def initialize stream @entities = {} @listeners = nil @parser = BaseParser.new( stream ) @my_stack = [] end
# File rexml/parsers/pullparser.rb, line 43 def add_listener( listener ) @listeners = [] unless @listeners @listeners << listener end
# File rexml/parsers/pullparser.rb, line 54 def peek depth=0 if @my_stack.length <= depth (depth - @my_stack.length + 1).times { e = PullEvent.new(@parser.pull) @my_stack.push(e) } end @my_stack[depth] end
# File rexml/parsers/pullparser.rb, line 64 def pull return @my_stack.shift if @my_stack.length > 0 event = @parser.pull case event[0] when :entitydecl @entities[ event[1] ] = event[2] unless event[2] =~ /PUBLIC|SYSTEM/ when :text unnormalized = @parser.unnormalize( event[1], @entities ) event << unnormalized end PullEvent.new( event ) end