1 /* 2 * Copyright (C) 2012 The Android Open Source Project 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 com.android.tradefed.config; 18 19 import com.android.tradefed.log.LogUtil.CLog; 20 21 import java.lang.reflect.Field; 22 import java.util.Collection; 23 import java.util.HashMap; 24 import java.util.Map; 25 26 /** 27 * A helper class that can copy {@link Option} field values with same names from one object to 28 * another. 29 */ 30 public class OptionCopier { 31 32 /** 33 * Copy the values from {@link Option} fields in <var>origObject</var> to <var>destObject</var> 34 * 35 * @param origObject the {@link Object} to copy from 36 * @param destObject the {@link Object} tp copy to 37 * @throws ConfigurationException if options failed to copy 38 */ copyOptions(Object origObject, Object destObject)39 public static void copyOptions(Object origObject, Object destObject) 40 throws ConfigurationException { 41 Collection<Field> origFields = OptionSetter.getOptionFieldsForClass(origObject.getClass()); 42 Map<String, Field> destFieldMap = getFieldOptionMap(destObject); 43 for (Field origField : origFields) { 44 final Option option = origField.getAnnotation(Option.class); 45 Field destField = destFieldMap.remove(option.name()); 46 if (destField != null) { 47 Object origValue = OptionSetter.getFieldValue(origField, 48 origObject); 49 OptionSetter.setFieldValue(option.name(), destObject, destField, origValue); 50 } 51 } 52 } 53 54 /** 55 * Identical to {@link #copyOptions(Object, Object)} but will log instead of throw if exception 56 * occurs. 57 */ copyOptionsNoThrow(Object source, Object dest)58 public static void copyOptionsNoThrow(Object source, Object dest) { 59 try { 60 copyOptions(source, dest); 61 } catch (ConfigurationException e) { 62 CLog.e(e); 63 } 64 } 65 66 /** 67 * Build a map of {@link Option#name()} to {@link Field} for given {@link Object}. 68 * 69 * @param destObject 70 * @return a {@link Map} 71 */ getFieldOptionMap(Object destObject)72 private static Map<String, Field> getFieldOptionMap(Object destObject) { 73 Collection<Field> destFields = OptionSetter.getOptionFieldsForClass(destObject.getClass()); 74 Map<String, Field> fieldMap = new HashMap<String, Field>(destFields.size()); 75 for (Field field : destFields) { 76 Option o = field.getAnnotation(Option.class); 77 fieldMap.put(o.name(), field); 78 } 79 return fieldMap; 80 } 81 } 82