68 lines
2.6 KiB
Java
68 lines
2.6 KiB
Java
/**
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* Copyright (C) 2016 The CyanogenMod Project
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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 org.cyanogenmod.platform.internal.common;
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import android.content.Context;
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import org.cyanogenmod.platform.internal.CMSystemService;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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/**
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* Helper methods for fetching a CMSystemService from a class declaration
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*/
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public class CMSystemServiceHelper {
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private Context mContext;
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public CMSystemServiceHelper(Context context) {
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mContext = context;
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}
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public CMSystemService getServiceFor(String className) {
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final Class<CMSystemService> serviceClass;
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try {
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serviceClass = (Class<CMSystemService>)Class.forName(className);
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} catch (ClassNotFoundException ex) {
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throw new RuntimeException("Failed to create service " + className
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+ ": service class not found", ex);
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}
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return getServiceFromClass(serviceClass);
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}
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public <T extends CMSystemService> T getServiceFromClass(Class<T> serviceClass) {
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final T service;
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try {
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Constructor<T> constructor = serviceClass.getConstructor(Context.class);
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service = constructor.newInstance(mContext);
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} catch (InstantiationException ex) {
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throw new RuntimeException("Failed to create service " + serviceClass
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+ ": service could not be instantiated", ex);
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} catch (IllegalAccessException ex) {
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throw new RuntimeException("Failed to create service " + serviceClass
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+ ": service must have a public constructor with a Context argument", ex);
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} catch (NoSuchMethodException ex) {
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throw new RuntimeException("Failed to create service " + serviceClass
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+ ": service must have a public constructor with a Context argument", ex);
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} catch (InvocationTargetException ex) {
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throw new RuntimeException("Failed to create service " + serviceClass
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+ ": service constructor threw an exception", ex);
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}
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return service;
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}
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}
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