/*
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* Copyright (c) 2020 WildFireChat. All rights reserved.
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*/
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/*
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* Copyright 2017 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cn.wildfire.chat.kit;
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/**
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* Used as a wrapper for data that is exposed via a LiveData that represents an event.
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*/
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public class Event<T> {
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private T mContent;
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private boolean hasBeenHandled = false;
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public Event(T content) {
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if (content == null) {
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throw new IllegalArgumentException("null values in Event are not allowed.");
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}
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mContent = content;
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}
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public T getContentIfNotHandled() {
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if (hasBeenHandled) {
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return null;
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} else {
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hasBeenHandled = true;
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return mContent;
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}
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}
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public boolean hasBeenHandled() {
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return hasBeenHandled;
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}
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}
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