com.angstoverseer.util.ReflectionUtil.java Source code

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Here is the source code for com.angstoverseer.util.ReflectionUtil.java

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/* 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.angstoverseer.util;

import com.angstoverseer.service.command.router.CommandRouterImpl;
import org.apache.commons.lang.StringUtils;
import org.apache.tapestry5.func.F;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

public final class ReflectionUtil {
    private ReflectionUtil() {
    }

    public static Method extractMethod(Object target, String methodName) {
        final Method[] declaredMethods = target.getClass().getDeclaredMethods();
        for (Method method : declaredMethods) {
            if (method.getName().equals(methodName)) {
                return method;
            }
        }

        throw new RuntimeException("Method not found: " + methodName);
    }

    public static Object getPropertyValue(Object target, String propertyName) {
        try {
            final Method getter = extractMethod(target, "get" + StringUtils.capitalize(propertyName));
            getter.setAccessible(true);
            return getter.invoke(target);
        } catch (Exception e) {
            throw new RuntimeException("Could not invoke method.", e);
        }
    }

    public static Object invokeMethod(Object target, String methodName, Object... parameters) {
        try {
            final Method method = extractMethod(target, methodName);
            method.setAccessible(true);
            return method.invoke(target, parameters);
        } catch (Exception e) {
            throw new RuntimeException("Could not invoke method.", e);
        }
    }

    public static void setField(String fieldName, Object target, Object value) {
        final Field field = ReflectionUtils.findField(target.getClass(), fieldName);
        field.setAccessible(true);
        ReflectionUtils.setField(field, target, value);
    }

}