1 /* 2 * Copyright 2013 AndroidPlot.com 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.androidplot.util; 18 import java.util.List; 19 import java.util.Set; 20 21 /** 22 * Utility class for obtaining synch lock across multiple objects. 23 */ 24 public abstract class MultiSynch { 25 26 /** 27 * Callback class for doing work from within a MultiSynch. 28 */ 29 public interface Action { 30 31 /** 32 * Invoked by MultiSynch.run(...) 33 * @param params 34 */ 35 public void run(Object[] params); 36 } 37 38 39 /** 40 * 41 * @param params 42 * @param synchSet Set of objects to be synchronized upon 43 * @param action Action to be invoked once full synchronization has been obtained. 44 */ 45 public static void run(Object[] params, Set synchSet, Action action) { 46 run(params, synchSet.toArray(), action, 0); 47 } 48 49 /** 50 * @param params 51 * @param synchList List of objects to be synchronized upon 52 * @param action Action to be invoked once full synchronization has been obtained. 53 */ 54 public static void run(Object[] params, List synchList, Action action) { 55 run(params, synchList.toArray(), action, 0); 56 } 57 58 /** 59 * @param params 60 * @param synchArr Array of objects to be synchronized upon 61 * @param action Action to be invoked once full synchronization has been obtained. 62 */ 63 public static void run(Object[] params, Object[] synchArr, Action action) { 64 run(params, synchArr, action, 0); 65 } 66 67 /** 68 * Recursively synchs on each item in SynchList 69 * @param params 70 * @param synchArr 71 * @param action 72 * @param depth 73 */ 74 private static void run(Object[] params, Object[] synchArr, Action action, int depth) { 75 if (synchArr != null) { 76 synchronized (synchArr[depth]) { 77 if (depth < synchArr.length - 1) { 78 run(params, synchArr, action, ++depth); 79 } else { 80 action.run(params); 81 } 82 } 83 } 84 action.run(params); 85 } 86 } 87
