Java Method Call invoke(Object target, Method method)

Description

invoke

License

Apache License

Declaration

static Object invoke(Object target, Method method) throws MBeanException, ReflectionException 

Method Source Code

//package com.java2s;
/*/* ww w .ja v a2 s. c  o m*/
 *  Copyright 2010 Dain Sundstrom
 *
 *  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 javax.management.MBeanException;
import javax.management.ReflectionException;
import javax.management.RuntimeErrorException;
import javax.management.RuntimeOperationsException;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import static java.util.Objects.requireNonNull;

public class Main {
    static Object invoke(Object target, Method method) throws MBeanException, ReflectionException {
        requireNonNull(target, "target is null");
        requireNonNull(method, "method is null");

        try {
            return method.invoke(target);
        } catch (InvocationTargetException e) {
            // unwrap exception
            Throwable targetException = e.getTargetException();
            if (targetException instanceof RuntimeException) {
                throw new MBeanException((RuntimeException) targetException,
                        "RuntimeException occurred while invoking " + toSimpleName(method));
            } else if (targetException instanceof ReflectionException) {
                // allow ReflectionException to passthrough
                throw (ReflectionException) targetException;
            } else if (targetException instanceof MBeanException) {
                // allow MBeanException to passthrough
                throw (MBeanException) targetException;
            } else if (targetException instanceof Exception) {
                throw new MBeanException((Exception) targetException,
                        "Exception occurred while invoking " + toSimpleName(method));
            } else if (targetException instanceof Error) {
                throw new RuntimeErrorException((Error) targetException,
                        "Error occurred while invoking " + toSimpleName(method));
            } else {
                throw new RuntimeErrorException(new AssertionError(targetException),
                        "Unexpected throwable occurred while invoking " + toSimpleName(method));
            }
        } catch (RuntimeException e) {
            throw new RuntimeOperationsException(e,
                    "RuntimeException occurred while invoking " + toSimpleName(method));
        } catch (IllegalAccessException e) {
            throw new ReflectionException(e,
                    "IllegalAccessException occurred while invoking " + toSimpleName(method));
        } catch (Error err) {
            throw new RuntimeErrorException(err, "Error occurred while invoking " + toSimpleName(method));
        } catch (Exception e) {
            throw new ReflectionException(e, "Exception occurred while invoking " + toSimpleName(method));
        }
    }

    private static String toSimpleName(Method method) {
        return method.getName() + "()";
    }
}

Related

1. invoke(Object owner, String methodName)
2. invoke(Object proxy, java.lang.reflect.Method method, Object[] args)
3. invoke(Object source, String key)
4. invoke(Object target, Class clazz, String methodName, Class[] parameterTypes, Object... args)
5. invoke(Object target, Class clazz, String method)
6. invoke(Object target, String methodName)
7. invoke(Object target, String methodName, Object... args)
8. invoke(Object target, String methodName, Object[] args)
9. invoke(Object target, String name, Class[] params, Object[] args)