package de.fhdw.wtf.parser;
   
   import de.fhdw.wtf.common.ast.Name;
   import de.fhdw.wtf.common.ast.UnqualifiedName;
   import de.fhdw.wtf.common.exception.parser.NoIdentifierException;
   import de.fhdw.wtf.common.stream.TokenStream;
   
   /**
    * Parser to parse the given TokenStream to {@link Name}s.
   */
  final class NameParser {
  	
  	/**
  	 * TokenStream.
  	 */
  	private final TokenStream stream;
  	
  	/**
  	 * Constructor of {@link NameParser}.
  	 * 
  	 * @param stream
  	 *            tokenStream
  	 */
  	private NameParser(final TokenStream stream) {
  		this.stream = stream;
  	}
  	
  	/**
  	 * FactoryMethod for {@link NameParser}.
  	 * 
  	 * @param stream
  	 *            tokenStream
  	 * @return The {@link NameParser}-Object.
  	 */
  	static NameParser createNameParser(final TokenStream stream) {
  		return new NameParser(stream);
  	}
  	
  	/**
  	 * Parses the next series of Token of stream to Name.
  	 * 
  	 * @return Name
  	 * @throws NoIdentifierException
  	 *             NoIdentifierException
  	 */
  	Name parse() throws NoIdentifierException {
  		Name newName = UnqualifiedName.create(ParserUtils.requireAndRemoveIdentifier(this.stream), this.stream.peek());
  		
  		while (this.stream.hasNext() && this.stream.peek().isGreaterSymbolToken()) {
  			this.stream.removeFirst();
  			newName = newName.addName(ParserUtils.requireAndRemoveIdentifier(this.stream));
  		}
  		return newName;
  	}
  	
  }