1 /* 2 * Copyright (C) 2010 Google Inc. 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 benchmarks.regression; 18 19 import java.security.AccessController; 20 import java.security.PrivilegedAction; 21 22 public class DoPrivilegedBenchmark { 23 public void timeDirect(int reps) throws Exception { 24 for (int i = 0; i < reps; ++i) { 25 String lineSeparator = System.getProperty("line.separator"); 26 } 27 } 28 29 public void timeFastAndSlow(int reps) throws Exception { 30 for (int i = 0; i < reps; ++i) { 31 String lineSeparator; 32 if (System.getSecurityManager() == null) { 33 lineSeparator = System.getProperty("line.separator"); 34 } else { 35 lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() { 36 public String run() { 37 return System.getProperty("line.separator"); 38 } 39 }); 40 } 41 } 42 } 43 44 public void timeNewAction(int reps) throws Exception { 45 for (int i = 0; i < reps; ++i) { 46 String lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() { 47 public String run() { 48 return System.getProperty("line.separator"); 49 } 50 }); 51 } 52 } 53 54 public void timeReusedAction(int reps) throws Exception { 55 final PrivilegedAction<String> action = new ReusableAction("line.separator"); 56 for (int i = 0; i < reps; ++i) { 57 String lineSeparator = AccessController.doPrivileged(action); 58 } 59 } 60 61 private static final class ReusableAction implements PrivilegedAction<String> { 62 private final String propertyName; 63 64 public ReusableAction(String propertyName) { 65 this.propertyName = propertyName; 66 } 67 68 public String run() { 69 return System.getProperty(propertyName); 70 } 71 } 72 } 73
