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package org.jsoup.parser;
import org.jsoup.helper.DescendableLinkedList;
import org.jsoup.helper.Validate;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
/**
* @author Jonathan Hedley
*/
abstract class TreeBuilder {
CharacterReader reader;
Tokeniser tokeniser;
protected Document doc; // current doc we are building into
protected DescendableLinkedList<Element> stack; // the stack of open
// elements
protected String baseUri; // current base uri, for creating new elements
protected Token currentToken; // currentToken is used only for error
// tracking.
protected ParseErrorList errors; // null when not tracking errors
protected void initialiseParse(String input, String baseUri,
ParseErrorList errors) {
Validate.notNull(input, "String input must not be null");
Validate.notNull(baseUri, "BaseURI must not be null");
doc = new Document(baseUri);
reader = new CharacterReader(input);
this.errors = errors;
tokeniser = new Tokeniser(reader, errors);
stack = new DescendableLinkedList<Element>();
this.baseUri = baseUri;
}
Document parse(String input, String baseUri) {
return parse(input, baseUri, ParseErrorList.noTracking());
}
Document parse(String input, String baseUri, ParseErrorList errors) {
initialiseParse(input, baseUri, errors);
runParser();
return doc;
}
protected void runParser() {
while (true) {
Token token = tokeniser.read();
process(token);
if (token.type == Token.TokenType.EOF) {
break;
}
}
}
protected abstract boolean process(Token token);
protected Element currentElement() {
return stack.getLast();
}
}
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