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Resource.java
/* * Copyright (C) 2017 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 com.android.example.github.vo; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import static com.android.example.github.vo.Status.ERROR; import static com.android.example.github.vo.Status.LOADING; import static com.android.example.github.vo.Status.SUCCESS; /** * A generic class that holds a value with its loading status. * @param
*/ public class Resource
{ @NonNull public final Status status; @Nullable public final String message; @Nullable public final T data; public Resource(@NonNull Status status, @Nullable T data, @Nullable String message) { this.status = status; this.data = data; this.message = message; } public static
Resource
success(@Nullable T data) { return new Resource<>(SUCCESS, data, null); } public static
Resource
error(String msg, @Nullable T data) { return new Resource<>(ERROR, data, msg); } public static
Resource
loading(@Nullable T data) { return new Resource<>(LOADING, data, null); } @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } Resource> resource = (Resource>) o; if (status != resource.status) { return false; } if (message != null ? !message.equals(resource.message) : resource.message != null) { return false; } return data != null ? data.equals(resource.data) : resource.data == null; } @Override public int hashCode() { int result = status.hashCode(); result = 31 * result + (message != null ? message.hashCode() : 0); result = 31 * result + (data != null ? data.hashCode() : 0); return result; } @Override public String toString() { return "Resource{" + "status=" + status + ", message='" + message + '\'' + ", data=" + data + '}'; } }