Java Reflection Method Get from Object getMethodFirstParamType(final String methodName, final Object o)

Description

get Method First Param Type

License

Apache License

Declaration

public static Class getMethodFirstParamType(final String methodName, final Object o) 

Method Source Code

//package com.java2s;
/*//  www. ja  va2  s .  c  om
 * Copyright 2008 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.
 */

import java.lang.reflect.Method;

public class Main {
    public static Class getMethodFirstParamType(final String methodName, final Object o) {
        Class firstParamType = null;
        Method[] methods = o.getClass().getMethods();
        for (Method method : methods) {
            if (method.getName().equals(methodName)) {
                firstParamType = getMethodFirstParamType(method);
            }
        }
        return (firstParamType);
    }

    public static Class getMethodFirstParamType(final Method method) {
        Class firstParamType = null;
        Class[] types = method.getParameterTypes();
        if (types.length > 0) {
            firstParamType = types[0];

        }
        return (firstParamType);
    }
}

Related

1. getMethod(String methodName, Object instance)
2. getMethodAnnotatedWith(final Class type, final Class annotation, String fieldName, Object fieldValue)
3. getMethodByName(Object target, String methodName)
4. getMethodConfigByAnnotaton(Object instance, Class declaringClass, Class annotationType, Class type)
5. getMethodDescriptor(Object instance, String methodName, Class aClass, Class... parameters)
6. getMethodIfAny(final Object instance, final String name, final Class[] params)
7. getMethodIgnoreCaseWithNoParams(Object o, String p)
8. getMethodInHolder(String methodName, Object holder)
9. getMethodInstace(Class c, Object inst, String name, Class[] types, boolean access)