| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed 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 android.databinding; |
| |
| import java.io.Serializable; |
| |
| /** |
| * An object wrapper to make it observable. |
| * <p> |
| * Observable field classes may be used instead of creating an Observable object: |
| * <pre><code>public class MyDataObject { |
| * public final ObservableField<String> name = new ObservableField<String>(); |
| * public final ObservableInt age = new ObservableInt(); |
| * }</code></pre> |
| * Fields of this type should be declared final because bindings only detect changes in the |
| * field's value, not of the field itself. |
| * |
| * @param <T> The type parameter for the actual object. |
| * @see android.databinding.ObservableParcelable |
| */ |
| public class ObservableField<T> extends BaseObservable implements Serializable { |
| static final long serialVersionUID = 1L; |
| private T mValue; |
| |
| /** |
| * Wraps the given object and creates an observable object |
| * |
| * @param value The value to be wrapped as an observable. |
| */ |
| public ObservableField(T value) { |
| mValue = value; |
| } |
| |
| /** |
| * Creates an empty observable object |
| */ |
| public ObservableField() { |
| } |
| |
| /** |
| * @return the stored value. |
| */ |
| public T get() { |
| return mValue; |
| } |
| |
| /** |
| * Set the stored value. |
| */ |
| public void set(T value) { |
| if (value != mValue) { |
| mValue = value; |
| notifyChange(); |
| } |
| } |
| } |