1 /* 2 * Copyright (C) 2013 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 android.animation; 18 19 /** 20 * Abstract base class used convert type T to another type V. This 21 * is necessary when the value types of in animation are different 22 * from the property type. 23 * @see PropertyValuesHolder#setConverter(TypeConverter) 24 */ 25 public abstract class TypeConverter<T, V> { 26 private Class<T> mFromClass; 27 private Class<V> mToClass; 28 29 public TypeConverter(Class<T> fromClass, Class<V> toClass) { 30 mFromClass = fromClass; 31 mToClass = toClass; 32 } 33 34 /** 35 * Returns the target converted type. Used by the animation system to determine 36 * the proper setter function to call. 37 * @return The Class to convert the input to. 38 */ 39 Class<V> getTargetType() { 40 return mToClass; 41 } 42 43 /** 44 * Returns the source conversion type. 45 */ 46 Class<T> getSourceType() { 47 return mFromClass; 48 } 49 50 /** 51 * Converts a value from one type to another. 52 * @param value The Object to convert. 53 * @return A value of type V, converted from <code>value</code>. 54 */ 55 public abstract V convert(T value); 56 } 57
