/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.isis.core.metamodel.services;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import com.google.common.base.Strings;
import org.apache.isis.applib.annotation.DomainService;
import org.apache.isis.core.commons.exceptions.IsisException;
public final class ServiceUtil {
private ServiceUtil() {
}
public static String id(final Class<?> serviceClass) {
final String serviceType = serviceTypeOf(serviceClass);
if (serviceType != null) {
return serviceType;
}
try {
Object object = serviceClass.newInstance();
return getIdOf(object);
} catch (InstantiationException | IllegalAccessException | NoSuchMethodException e) {
return null;
}
}
public static String id(final Object object) {
final Class<?> serviceClass = object.getClass();
final String serviceType = serviceTypeOf(serviceClass);
if(serviceType != null) {
return serviceType;
}
try {
return getIdOf(object);
} catch (final NoSuchMethodException e) {
return fqcnOf(serviceClass);
}
}
private static String serviceTypeOf(final Class<?> serviceClass) {
final String serviceType;
final DomainService domainService = serviceClass.getAnnotation(DomainService.class);
if(domainService != null) {
serviceType = domainService.objectType();
if(!Strings.isNullOrEmpty(serviceType)) {
return serviceType;
}
}
return null;
}
private static String getIdOf(final Object object) throws NoSuchMethodException {
try {
final Class<?> objectClass = object.getClass();
final Method m = objectClass.getMethod("getId");
return (String) m.invoke(object);
} catch (final SecurityException | IllegalArgumentException | IllegalAccessException | InvocationTargetException e) {
throw new IsisException(e);
}
}
private static String fqcnOf(final Class<?> serviceClass) {
return serviceClass.getName();
}
}