/*
* Copyright 2011 the original author or authors.
* 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 com.jayway.jaxrs.hateoas.support;
import com.jayway.jaxrs.hateoas.HateoasInjectException;
import java.lang.reflect.Field;
/**
* General reflection utilities. Not intended for external use.
*
* @author Mattias Hellborg Arthursson
* @author Kalle Stenflo
*/
public class ReflectionUtils {
private ReflectionUtils() {
}
public static boolean hasField(Object entity, String fieldName) {
try {
getField(entity, fieldName);
return true;
} catch (NoSuchFieldException e) {
return false;
}
}
public static void setFieldAccessible(Field field) {
if (!field.isAccessible()) {
field.setAccessible(true);
}
}
public static Object getFieldValue(Object entity, String fieldName) {
try {
Field field = getField(entity, fieldName);
return field.get(entity);
} catch (Exception e) {
throw new HateoasInjectException(e);
}
}
public static Field getField(Object entity, String fieldName)
throws NoSuchFieldException {
Field field = entity.getClass().getDeclaredField(fieldName);
setFieldAccessible(field);
return field;
}
public static void setField(Object entity, String fieldName, Object value) {
try {
Field field = getField(entity, fieldName);
field.set(entity, value);
} catch (Exception e) {
throw new HateoasInjectException(e);
}
}
}