/*
* Copyright (c) 2012 Socialize Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.socialize.util;
import java.lang.reflect.Field;
/**
* Gets the value of a reflected field.
* @author Jason
*/
public final class ReflectionUtils {
/**
* Gets the value of the given static field from the given class.
* @param fieldName
* @param clazz
* @return
* @throws Exception
*/
@SuppressWarnings("unchecked")
public static final <E extends Object> E getStaticField(String fieldName, Class<?> clazz) throws Exception {
try {
Field field = clazz.getField(fieldName);
if(field != null) {
return (E) field.get(null);
}
} catch (Exception e) {
throw e;
}
return null;
}
public static final boolean hasStaticField(String fieldName, Class<?> clazz) {
Field[] fields = clazz.getFields();
for (Field field : fields) {
if(field.getName().equals(fieldName)) {
return true;
}
}
return false;
}
/**
* Returns the name of the static field that corresponds to the given value
* @param value
* @param clazz
* @return
* @throws Exception
*/
public static final String getStaticFieldName(Object value, Class<?> clazz) throws Exception {
Field[] fields = clazz.getFields();
for (Field field : fields) {
Object fVal = field.get(null);
if(fVal != null && fVal.equals(value)) {
return field.getName();
}
}
return null;
}
}