    1   /* AcceptRule
    2   *
    3   * $Id: PredicatedDecideRule.java 4914 2007-02-18 21:53:01Z gojomo $
    4   *
    5   * Created on Mar 3, 2005
    6   *
    7   * Copyright (C) 2005 Internet Archive.
    8   *
    9   * This file is part of the Heritrix web crawler (crawler.archive.org).
    10  *
    11  * Heritrix is free software; you can redistribute it and/or modify
    12  * it under the terms of the GNU Lesser Public License as published by
    13  * the Free Software Foundation; either version 2.1 of the License, or
    14  * any later version.
    15  *
    16  * Heritrix is distributed in the hope that it will be useful,
    17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    19  * GNU Lesser Public License for more details.
    20  *
    21  * You should have received a copy of the GNU Lesser Public License
    22  * along with Heritrix; if not, write to the Free Software
    23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    24  */
    25  package org.archive.crawler.deciderules;
    26
    27  /***
    28   * Rule which applies the configured decision only if a
    29   * test evaluates to true. Subclasses override evaluate()
    30   * to establish the test.
    31   *
    32   * @author gojomo
    33   */
    34  public abstract class PredicatedDecideRule extends ConfiguredDecideRule {
    35      public PredicatedDecideRule(String name) {
    36          super(name);
    37          setDescription("ABSTRACT: Should not appear as choice.");
    38      }
    39
    40      public Object decisionFor(Object object) {
    41          if(evaluate(object)) {
    42              return super.decisionFor(object);
    43          }
    44          return PASS;
    45      }
    46
    47      protected abstract boolean evaluate(Object object);
    48  }