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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.serialization.queryformats.utils;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Set;
import javax.ws.rs.core.MultivaluedMap;
import org.onap.aai.serialization.queryformats.exceptions.QueryParamInjectionException;
import org.onap.aai.serialization.queryformats.params.Inject;
import org.onap.aai.serialization.queryformats.params.Setter;
import org.reflections.Reflections;
public class QueryParamInjector {
private final Set<Class<?>> results;
private QueryParamInjector () {
Reflections reflections = new Reflections("org.onap.aai.serialization.queryformats.params");
results = reflections.getTypesAnnotatedWith(Inject.class);
}
private static class Helper {
private static final QueryParamInjector INSTANCE = new QueryParamInjector();
}
public static QueryParamInjector getInstance() {
return Helper.INSTANCE;
}
public <T> T injectParams(T obj, MultivaluedMap<String, String> params) throws QueryParamInjectionException{
try {
for (Class<?> item : results) {
if (item.isAssignableFrom(obj.getClass())) {
String name = item.getAnnotation(Inject.class).name();
if (params.containsKey(name)) {
String value = params.getFirst(name);
for (Method method : item.getMethods()) {
if (method.isAnnotationPresent(Setter.class)) {
Class<?>[] args = method.getParameterTypes();
if (args.length == 1) {
Object o = args[0].getConstructor(String.class).newInstance(value);
method.invoke(obj, o);
} else {
method.invoke(obj);
}
}
}
}
}
}
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException | NoSuchMethodException
| SecurityException e) {
throw new QueryParamInjectionException("issue with query params", e);
}
return obj;
}
}
|
