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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 | * Licensed to the Apache Software Foundation (ASF) under one | |
21 | * or more contributor license agreements. See the NOTICE file | |
22 | * distributed with this work for additional information | |
23 | * regarding copyright ownership. The ASF licenses this file | |
24 | * to you under the Apache License, Version 2.0 (the | |
25 | * "License"); you may not use this file except in compliance | |
26 | * with the License. You may obtain a copy of the License at | |
27 | * | |
28 | * http://www.apache.org/licenses/LICENSE-2.0 | |
29 | * | |
30 | * Unless required by applicable law or agreed to in writing, | |
31 | * software distributed under the License is distributed on an | |
32 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
33 | * KIND, either express or implied. See the License for the | |
34 | * specific language governing permissions and limitations | |
35 | * under the License. | |
36 | */ | |
37 | ||
38 | package org.apache.thrift.meta_data; | |
39 | ||
40 | import org.apache.thrift.TBase; | |
41 | ||
42 | import java.util.Hashtable; | |
43 | ||
44 | ||
45 | /** | |
46 | * This class is used to store meta data about thrift fields. Every field in a | |
47 | * a struct should have a corresponding instance of this class describing it. | |
48 | * | |
49 | */ | |
50 | public class FieldMetaData { | |
51 | public final String fieldName; | |
52 | public final byte requirementType; | |
53 | public final FieldValueMetaData valueMetaData; | |
54 | private static Hashtable structMap; | |
55 | ||
56 | static { | |
57 | structMap = new Hashtable(); | |
58 | } | |
59 | ||
60 | public FieldMetaData(String name, byte req, FieldValueMetaData vMetaData){ | |
61 | this.fieldName = name; | |
62 | this.requirementType = req; | |
63 | this.valueMetaData = vMetaData; | |
64 | } | |
65 | ||
66 | public static synchronized void addStructMetaDataMap(Class sClass, Hashtable map){ | |
67 | structMap.put(sClass, map); | |
68 | } | |
69 | ||
70 | /** | |
71 | * Returns a map with metadata (i.e. instances of FieldMetaData) that | |
72 | * describe the fields of the given class. | |
73 | * | |
74 | * @param sClass The TBase class for which the metadata map is requested | |
75 | */ | |
76 | public static synchronized Hashtable getStructMetaDataMap(Class sClass){ | |
77 | if (!structMap.containsKey(sClass)){ // Load class if it hasn't been loaded | |
78 | try{ | |
79 | sClass.newInstance(); | |
80 | } catch (InstantiationException e){ | |
81 | throw new RuntimeException("InstantiationException for TBase class: " + sClass.getName() + ", message: " + e.getMessage()); | |
82 | } catch (IllegalAccessException e){ | |
83 | throw new RuntimeException("IllegalAccessException for TBase class: " + sClass.getName() + ", message: " + e.getMessage()); | |
84 | } | |
85 | } | |
86 | return (Hashtable) structMap.get(sClass); | |
87 | } | |
88 | } |