Handler.java revision 4e867904c8295537803c1c8a076e130df5674b58 
1package org.owasp.html;
2
3import com.google.common.base.Throwables;
4
5/**
6 * Receives notification of problems.
7 *
8 * @author Mike Samuel <mikesamuel@gmail.com>
9 */
10public interface Handler<T> {
11
12  void handle(T x);
13
14  /** A handler that does nothing given any input. */
15  public static final Handler<?> DO_NOTHING = new Handler<Object>() {
16    public void handle(Object x) {
17      // Really, do nothing.
18    }
19  };
20
21  /**
22   * A handler that re-raises an error, wrapping it in a runtime exception if
23   * necessary.
24   */
25  public static final Handler<Throwable> PROPAGATE = new Handler<Throwable>() {
26    public void handle(Throwable th) {
27      Throwables.propagate(th);
28    }
29  };
30}
31