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/*
* Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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 org.traccar.helper;
import java.beans.Introspector;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public final class Clazz {
private Clazz() {
}
public static Class getGenericArgumentType(Class currentClass, Class genericSuperClass) {
return getGenericArgumentType(currentClass, genericSuperClass, 0);
}
public static Class getGenericArgumentType(Class currentClass, int argumentIndex) {
return getGenericArgumentType(currentClass, null, argumentIndex);
}
public static Class getGenericArgumentType(Class currentClass) {
return getGenericArgumentType(currentClass, null, 0);
}
public static Class getGenericArgumentType(Class currentClass, Class genericSuperClass, int argumentIndex) {
Type superType = currentClass.getGenericSuperclass();
if (superType == null) {
throw new IllegalArgumentException();
}
if (!(superType instanceof ParameterizedType)
|| genericSuperClass != null
&& ((ParameterizedType) superType).getRawType() != genericSuperClass) {
return getGenericArgumentType(currentClass.getSuperclass(), genericSuperClass, argumentIndex);
}
Object[] args = ((ParameterizedType) superType).getActualTypeArguments();
if (argumentIndex >= args.length) {
throw new IllegalArgumentException();
}
return cast(Class.class, args[argumentIndex]);
}
public static <T> T newInstance(Class<T> clazz) {
try {
return clazz.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw new IllegalArgumentException();
}
}
public static <T> T cast(Class<T> classe, Object objeto) {
if (classe.isAssignableFrom(objeto.getClass())) {
return classe.cast(objeto);
}
throw new ClassCastException();
}
public static Class forName(String className) {
try {
return Class.forName(className, false, Thread.currentThread().getContextClassLoader());
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException(e);
}
}
public static long getId(Object entity) throws Exception {
Method[] methods = entity.getClass().getMethods();
for (final Method method : methods) {
if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) {
final String name = Introspector.decapitalize(method.getName().substring(3));
if (name.equals("id")) {
return Long.parseLong(method.invoke(entity).toString());
}
}
}
throw new IllegalArgumentException();
}
public static void setId(Object entity, long id) throws Exception {
Method[] methods = entity.getClass().getMethods();
for (final Method method : methods) {
if (method.getName().startsWith("set") && method.getParameterTypes().length == 1) {
final String name = Introspector.decapitalize(method.getName().substring(3));
if (name.equals("id")) {
method.invoke(entity, id);
break;
}
}
}
}
}
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