/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.nutsnbolts.reflection.aop;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.smallmind.nutsnbolts.reflection.bean.BeanAccessException;
import org.smallmind.nutsnbolts.reflection.bean.BeanInvocationException;
import org.smallmind.nutsnbolts.reflection.bean.BeanUtility;
public class AOPUtility {
public static Object getParameterValue (JoinPoint joinPoint, String parameterName, boolean nullable)
throws BeanAccessException, BeanInvocationException {
Object argumentValue;
MethodSignature methodSignature = ((MethodSignature) joinPoint.getSignature());
String[] parameterNames;
String baseParameter;
String parameterGetter = null;
int dotPos;
if ((dotPos = parameterName.indexOf('.')) < 0) {
baseParameter = parameterName;
} else {
baseParameter = parameterName.substring(0, dotPos);
parameterGetter = parameterName.substring(dotPos + 1);
}
parameterNames = methodSignature.getParameterNames();
for (int index = 0; index < parameterNames.length; index++) {
if (parameterNames[index].equals(baseParameter)) {
argumentValue = (parameterGetter == null) ? joinPoint.getArgs()[index] : BeanUtility.executeGet(joinPoint.getArgs()[index], parameterGetter, nullable);
if (argumentValue == null) {
if (methodSignature.getParameterTypes()[index].isPrimitive()) {
throw new BeanAccessException("A 'null' parameter can't be assigned to the primitive type '%s'", methodSignature.getParameterTypes()[index]);
} else if (!nullable) {
throw new NullPointerException("Null value in a non-nullable parameter access");
}
}
return argumentValue;
}
}
throw new BeanAccessException("The parameter(%s) was not found as part of the method(%s) signature", baseParameter, methodSignature.getName());
}
}