Java Reflection Method Parameter getMethodFromClassName(String classAndMethodName, Class... parameterTypes)

Description

Returns a method from the class and method name string.

License

Open Source License

Declaration

private static Method getMethodFromClassName(String classAndMethodName, Class<?>... parameterTypes)
        throws Exception 

Method Source Code

//package com.java2s;
/**//from w  ww  .j  a v  a 2 s  .  c om
 * The MIT License
 * Copyright (c) 2015 Estonian Information System Authority (RIA), Population Register Centre (VRK)
 *
 * 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.
 */

import java.lang.reflect.Method;

public class Main {
    /**
     * Returns a method from the class and method name string. Assumes, the
     * class name is in form [class].[method]
     */
    private static Method getMethodFromClassName(String classAndMethodName, Class<?>... parameterTypes)
            throws Exception {
        int lastIdx = classAndMethodName.lastIndexOf('.');
        if (lastIdx == -1) {
            throw new IllegalArgumentException("classAndMethodName must be in form of <class>.<method>");
        }

        String className = classAndMethodName.substring(0, lastIdx);
        String methodName = classAndMethodName.substring(lastIdx + 1);

        Class<?> clazz = Class.forName(className);
        return clazz.getMethod(methodName, parameterTypes);
    }
}

Related

1. getMethod0(Class target, String name, Class[] parameterTypes)
2. getMethodAnnotations(String className, String methodName, Class[] parameterTypes)
3. getMethodByName(Class clazz, String name, Class... parameterTypes)
4. getMethodByParametersWithAnnotation(final Class source, final Class[] params, final Class annotation)
5. getMethodFromClass(String className, String methodName, Class... parameterTypes)
6. getMethodFullName(Method m, boolean includeClassPackage, boolean includeParametersType, boolean includeTypesPackage)
7. getMethodGenericParameterTypes(Method method, int index)
8. getMethodHandle(final Lookup lookup, final Class receiver, final String methodName, final Class... parameterTypes)
9. getMethodName(Method method, Class[] parameterClasses, String rightCode)