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f67539c2 TL |
1 | /* |
2 | * Licensed to the Apache Software Foundation (ASF) under one | |
3 | * or more contributor license agreements. See the NOTICE file | |
4 | * distributed with this work for additional information | |
5 | * regarding copyright ownership. The ASF licenses this file | |
6 | * to you under the Apache License, Version 2.0 (the | |
7 | * "License"); you may not use this file except in compliance | |
8 | * with the License. You may obtain a copy of the License at | |
9 | * | |
10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
11 | * | |
12 | * Unless required by applicable law or agreed to in writing, | |
13 | * software distributed under the License is distributed on an | |
14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
15 | * KIND, either express or implied. See the License for the | |
16 | * specific language governing permissions and limitations | |
17 | * under the License. | |
18 | */ | |
19 | ||
20 | package org.apache.thrift; | |
21 | ||
22 | import java.lang.NoSuchMethodException; | |
23 | import java.lang.IllegalAccessException; | |
24 | import java.lang.reflect.InvocationTargetException; | |
25 | import java.lang.reflect.Method; | |
26 | ||
27 | /** | |
28 | * Utility class with static methods for interacting with TEnum | |
29 | */ | |
30 | public class TEnumHelper { | |
31 | ||
32 | /** | |
33 | * Given a TEnum class and integer value, this method will return | |
34 | * the associated constant from the given TEnum class. | |
35 | * This method MUST be modified should the name of the 'findByValue' method | |
36 | * change. | |
37 | * | |
38 | * @param enumClass TEnum from which to return a matching constant. | |
39 | * @param value Value for which to return the constant. | |
40 | * | |
41 | * @return The constant in 'enumClass' whose value is 'value' or null if | |
42 | * something went wrong. | |
43 | */ | |
44 | public static TEnum getByValue(Class<? extends TEnum> enumClass, int value) { | |
45 | try { | |
46 | Method method = enumClass.getMethod("findByValue", int.class); | |
47 | return (TEnum) method.invoke(null, value); | |
48 | } catch (NoSuchMethodException nsme) { | |
49 | return null; | |
50 | } catch (IllegalAccessException iae) { | |
51 | return null; | |
52 | } catch (InvocationTargetException ite) { | |
53 | return null; | |
54 | } | |
55 | } | |
56 | } |