1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.hc.core5.util;
29
30 import java.lang.reflect.Method;
31
32 import org.apache.hc.core5.annotation.Internal;
33
34 @Internal
35 public final class ReflectionUtils {
36
37 public static void callSetter(final Object object, final String setterName, final Class<?> type, final Object value) {
38 try {
39 final Class<?> clazz = object.getClass();
40 final Method method = clazz.getMethod("set" + setterName, type);
41 method.setAccessible(true);
42 method.invoke(object, value);
43 } catch (final Exception ignore) {
44 }
45 }
46
47 public static <T> T callGetter(final Object object, final String getterName, final Class<T> resultType) {
48 try {
49 final Class<?> clazz = object.getClass();
50 final Method method = clazz.getMethod("get" + getterName);
51 method.setAccessible(true);
52 return resultType.cast(method.invoke(object));
53 } catch (final Exception ignore) {
54 return null;
55 }
56 }
57
58 public static int determineJRELevel() {
59 final String s = System.getProperty("java.version");
60 final String[] parts = s.split("\\.");
61 if (parts.length > 0) {
62 try {
63 final int majorVersion = Integer.parseInt(parts[0]);
64 if (majorVersion > 1) {
65 return majorVersion;
66 } else if (majorVersion == 1 && parts.length > 1) {
67 return Integer.parseInt(parts[1]);
68 }
69 } catch (final NumberFormatException ignore) {
70 }
71 }
72 return 7;
73 }
74
75 }