A piece of Java code

gistfile1.java

public class RenamedClass extends Iterator {
	protected Iterator iterator;
	protected Predicate[] predicates;
	protected Tuple currentTuple;

	public RenamedClass(Iterator iter, Predicate... preds) {
		this.schema = iter.schema;
		this.iterator = iter;
		this.predicates = preds;
		this.currentTuple = null;
	}

	public void explain(int depth) {
		indent(depth);

		System.out.print("What? ");

		for (int i = 0; i < this.predicates.length - 1; i++)
			System.out.print(this.predicates[i].toString() + " OR ");

		System.out.println(this.predicates[(this.predicates.length - 1)]);

		this.iterator.explain(depth + 1);
	}

	public void restart() {
		this.iterator.restart();
		this.currentTuple = null;
	}

	public boolean isOpen() {
		return this.iterator != null;
	}

	public void close() {
		if (this.iterator != null) {
			this.iterator.close();
			this.iterator = null;
		}
	}

	public boolean hasNext() {
		while (this.iterator.hasNext()) {
			this.currentTuple = this.iterator.getNext();

			for (int i = 0; i < this.predicates.length; i++)
				if (this.predicates[i].evaluate(this.currentTuple))
					return true;
		}

		return false;
	}

	public Tuple getNext() {
		if (this.currentTuple == null)
			throw new IllegalStateException("No next tuple.");

		return this.currentTuple;
	}

}