Java Reflection Method Setter Invoke invokeSetters(final T instance, final Map vars)

Description

Invoke the setters for the given variables on the given instance.

License

Apache License

Parameter

Parameter	Description
T	the instance type
instance	the instance to inject with the variables
vars	the variables to inject

Exception

Parameter	Description
ReflectiveOperationException	if there was a problem finding or invoking a setter method

Return

the instance

Declaration

public static <T> T invokeSetters(final T instance, final Map<String, Object> vars)
        throws ReflectiveOperationException 

Method Source Code

//package com.java2s;
/*/*from w w w .j a  v  a 2 s.c o  m*/
 * Copyright 2011 Greg Haines
 * 
 * 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;

import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;

public class Main {
    /**
     * Invoke the setters for the given variables on the given instance.
     * @param <T> the instance type
     * @param instance the instance to inject with the variables
     * @param vars the variables to inject
     * @return the instance
     * @throws ReflectiveOperationException if there was a problem finding or invoking a setter method
     */
    public static <T> T invokeSetters(final T instance, final Map<String, Object> vars)
            throws ReflectiveOperationException {
        if (instance != null && vars != null) {
            final Class<?> clazz = instance.getClass();
            final Method[] methods = clazz.getMethods();
            for (final Entry<String, Object> entry : vars.entrySet()) {
                final String methodName = "set" + entry.getKey().substring(0, 1).toUpperCase(Locale.US)
                        + entry.getKey().substring(1);
                boolean found = false;
                for (final Method method : methods) {
                    if (methodName.equals(method.getName()) && method.getParameterTypes().length == 1) {
                        method.invoke(instance, entry.getValue());
                        found = true;
                        break;
                    }
                }
                if (!found) {
                    throw new NoSuchMethodException(
                            "Expected setter named '" + methodName + "' for var '" + entry.getKey() + "'");
                }
            }
        }
        return instance;
    }
}

Related

1. invokeSetter(Method setter, Object object, Object propValue)
2. invokeSetter(Object entity, String propertyName, Object propertyValue)
3. invokeSetter(Object o, String name, Class value1clazz, Object value)
4. invokeSetter(Object o, String name, Object value, Class clazz)
5. invokeSetterMethod(Method method, Object oBean, Object oValue)