1d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd/* 2d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * Copyright (C) 2015 The Android Open Source Project 3d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * 4d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * Licensed under the Apache License, Version 2.0 (the "License"); 5d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * you may not use this file except in compliance with the License. 6d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * You may obtain a copy of the License at 7d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * 8d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * http://www.apache.org/licenses/LICENSE-2.0 9d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * 10d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * Unless required by applicable law or agreed to in writing, software 11d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * distributed under the License is distributed on an "AS IS" BASIS, 12d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * See the License for the specific language governing permissions and 14d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * limitations under the License. 15d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd */ 16d3b009ae55651f1e60950342468e3c37fdeb0796Mike Doddpackage com.android.messaging.datamodel.binding; 17d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd 18d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd/** 19d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * A BindableData that's only used to be bound once. If the client needs to rebind, it needs 20d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * to create a new instance of the BindableOnceData. 21d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd */ 22d3b009ae55651f1e60950342468e3c37fdeb0796Mike Doddpublic abstract class BindableOnceData extends BindableData { 23d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd private boolean boundOnce = false; 24d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd 25d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd @Override 26d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd public void bind(final String bindingId) { 27d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd // Ensures that we can't re-bind again after the first binding. 28d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd if (boundOnce) { 29d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd throw new IllegalStateException(); 30d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd } 31d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd super.bind(bindingId); 32d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd boundOnce = true; 33d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd } 34d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd 35d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd /** 36d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd * Checks if the instance is bound to anything. 37d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd */ 38d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd @Override 39d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd public boolean isBound() { 40d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd return super.isBound(); 41d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd } 42d3b009ae55651f1e60950342468e3c37fdeb0796Mike Dodd} 43