| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.thrift.meta_data; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.thrift.TBase; |
| |
| /** |
| * This class is used to store meta data about thrift fields. Every field in a |
| * a struct should have a corresponding instance of this class describing it. |
| * |
| */ |
| public class FieldMetaData implements java.io.Serializable { |
| public final String fieldName; |
| public final byte requirementType; |
| public final FieldValueMetaData valueMetaData; |
| private static Map<Class<? extends TBase>, Map<Integer, FieldMetaData>> structMap; |
| |
| static { |
| structMap = new HashMap<Class<? extends TBase>, Map<Integer, FieldMetaData>>(); |
| } |
| |
| public FieldMetaData(String name, byte req, FieldValueMetaData vMetaData){ |
| this.fieldName = name; |
| this.requirementType = req; |
| this.valueMetaData = vMetaData; |
| } |
| |
| public static void addStructMetaDataMap(Class<? extends TBase> sClass, Map<Integer, FieldMetaData> map){ |
| structMap.put(sClass, map); |
| } |
| |
| /** |
| * Returns a map with metadata (i.e. instances of FieldMetaData) that |
| * describe the fields of the given class. |
| * |
| * @param sClass The TBase class for which the metadata map is requested |
| */ |
| public static Map<Integer, FieldMetaData> getStructMetaDataMap(Class<? extends TBase> sClass){ |
| if (!structMap.containsKey(sClass)){ // Load class if it hasn't been loaded |
| try{ |
| sClass.newInstance(); |
| } catch (InstantiationException e){ |
| throw new RuntimeException("InstantiationException for TBase class: " + sClass.getName() + ", message: " + e.getMessage()); |
| } catch (IllegalAccessException e){ |
| throw new RuntimeException("IllegalAccessException for TBase class: " + sClass.getName() + ", message: " + e.getMessage()); |
| } |
| } |
| return structMap.get(sClass); |
| } |
| } |