package dk.itu.oop.lecture5;

public class DropParenthesis implements OOPIterator {
	private OOPIterator in;

	public DropParenthesis(OOPIterator in){
		this.in = in;
		skipParenthesis();
	}

	private void skipParenthesis(){
		if ( !in.hasNext() )
			return;

		char c = ( (Character) in.peek() ).charValue();
		if ( c=='(' ){
			while ( in.hasNext() &&c != ')' ){
				in.next();
				c = ( (Character) in.peek() ).charValue();
			}
			if ( in.hasNext() && c == ')' )
				in.next();
		}
	}


	public boolean hasNext(){ return in.hasNext(); }

	public Object peek(){ return in.peek(); }

	public Object next(){
		Object o = peek();
		in.next();
		skipParenthesis();
		return o;
	}

	public OOPIterator cloneMe(){
		try{
			DropParenthesis clone = (DropParenthesis)super.clone();
			clone.in = in.cloneMe();
			return clone;
		}catch(CloneNotSupportedException e){
			return null;
		}
	}

	public static void main(String[] args){
		String haddock = "You #!@ Miserable (earthworms!) Numbskulls! and Carpet-sellers!";
		OOPIterator itr = new DropParenthesis(new CharacterIterator( haddock ) );
		while (itr.hasNext())
			System.out.print( itr.next() );
		System.out.println();
	}
}