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//
// Copyright 2017, 2018 Filippo "Fil" Bergamo <fil.bergamo@riseup.net>
//
// This file is part of RepWifiApp.
//
// RepWifiApp is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// RepWifiApp is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with RepWifiApp. If not, see <http://www.gnu.org/licenses/>.
//
// ********************************************************************
package fil.libre.repwifiapp.fwproxies;
import fil.libre.repwifiapp.helpers.Logger;
import java.lang.reflect.Constructor;
/**
* Provides a base class for creating "proxy" classes that wrap up classes from
* the Android Application Framework via reflection, exposing them outside the
* framework itself.
*/
public abstract class FrameworkProxy {
protected Object inner;
protected abstract String getInnerClassName();
protected static String getStaticInnerClassName() {
return "Object";
}
protected static Class<?> getClassFromName(String className) {
try {
return Class.forName(className);
} catch (ClassNotFoundException e) {
Logger.logError(null, e);
return null;
}
}
protected Class<?> getInnerClass() {
return getClassFromName(getInnerClassName());
}
protected Class<?>[] getTypesArray(Class<?>... args) {
Class<?>[] types = new Class<?>[args.length];
for (int i = 0; i < args.length; i++) {
types[i] = args[i];
}
return types;
}
protected Object createInnerObject(Class<?> argType, Object arg) {
return createInnerObject(getTypesArray(argType), arg);
}
protected Object createInnerObject(Class<?>[] argumentTypes, Object... args) {
try {
Class<?> cls = getClassFromName(getInnerClassName());
Constructor<?> c = cls.getConstructor(argumentTypes);
this.inner = c.newInstance(getRealArgs(args));
return this.inner;
} catch (Exception e) {
Logger.logError("Exception while creating inner object via reflection.", e);
return null;
}
}
protected Object invokeMethodGetResult(String methodName, Class<?> argumentType, Object arg) {
return invokeMethodGetResult(methodName, getTypesArray(argumentType), arg);
}
protected Object invokeMethodGetResult(String methodName, Class<?>[] argumentTypes,
Object... args) {
try {
return getClassFromName(getInnerClassName()).getMethod(methodName, argumentTypes)
.invoke(inner, getRealArgs(args));
} catch (Exception e) {
Logger.logError("Exception while invoking method via reflection.", e);
return null;
}
}
protected void invokeMethod(String methodName, Class<?> argumentType, Object arg) {
invokeMethod(methodName, getTypesArray(argumentType), arg);
}
protected void invokeMethod(String methodName, Class<?>[] argumentTypes, Object... args) {
try {
getClassFromName(getInnerClassName()).getMethod(methodName, argumentTypes).invoke(
inner, getRealArgs(args));
} catch (Exception e) {
Logger.logError("Exception while invoking method via reflection.", e);
}
}
private Object[] getRealArgs(Object[] args) {
if (args == null || args.length == 0) {
return new Object[] {};
}
// if the object is just a proxy, use the inner object as an argument to
// the call.
for (int i = 0; i < args.length; i++) {
if (args[i] instanceof FrameworkProxy) {
args[i] = ((FrameworkProxy) args[i]).inner;
}
}
return args;
}
}
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