001 /* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2008-2011 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * Sonar is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * Sonar is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public 017 * License along with Sonar; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02 019 */ 020 021 package net.sourceforge.pmd.util.filter; 022 023 /** 024 * A base class for Filters which implements behavior using delegation 025 * to an underlying filter. 026 * 027 * @param <T> 028 * The underlying type on which the filter applies. 029 */ 030 public abstract class AbstractDelegateFilter<T> implements Filter<T> { 031 protected Filter<T> filter; 032 033 public AbstractDelegateFilter() { 034 } 035 036 public AbstractDelegateFilter(Filter<T> filter) { 037 this.filter = filter; 038 } 039 040 public Filter<T> getFilter() { 041 return filter; 042 } 043 044 public void setFilter(Filter<T> filter) { 045 this.filter = filter; 046 } 047 048 // Subclass should override to do something other the simply delegate. 049 public boolean filter(T obj) { 050 return filter.filter(obj); 051 } 052 053 // Subclass should override to do something other the simply delegate. 054 public String toString() { 055 return filter.toString(); 056 } 057 }