001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.hivemind.impl; 016 017import java.util.ArrayList; 018import java.util.Collections; 019import java.util.List; 020 021import org.apache.hivemind.internal.Contribution; 022import org.apache.hivemind.internal.Module; 023 024/** 025 * Implements the {@link org.apache.hivemind.internal.Contribution} interface, a wrapper 026 * around objects that can provide values that plug into an extension point. 027 * 028 * @author Howard Lewis Ship 029 */ 030public final class ContributionImpl implements Contribution 031{ 032 private Module _contributingModule; 033 034 private List _elements; 035 036 public Module getContributingModule() 037 { 038 return _contributingModule; 039 } 040 041 public void setContributingModule(Module module) 042 { 043 _contributingModule = module; 044 } 045 046 public void addElements(List elements) 047 { 048 if (_elements == null) 049 _elements = new ArrayList(elements); 050 else 051 _elements.addAll(elements); 052 } 053 054 public List getElements() 055 { 056 if (_elements == null) 057 return Collections.EMPTY_LIST; 058 059 return _elements; 060 } 061}