PluginUtils.java

/*
       This file is part of mjprof.

        mjprof 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.

        mjprof 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 mjprof.  If not, see <http://www.gnu.org/licenses/>.
*/

package com.performizeit.mjprof.plugin;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Set;

import com.performizeit.mjprof.api.*;
import com.performizeit.mjprof.plugin.types.*;
import org.reflections.Reflections;


public class PluginUtils {


  public static Object initObj(Class<?> clazz, Class[] paramTypes, Object[] paramArgs) {
    try {
      Constructor<?> constructor = clazz.getConstructor(paramTypes);
      return constructor.newInstance(paramArgs);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }


  //conParameter - constructor parameters
  public static HashMap<Class, Class> getAllPlugins() throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException, ClassNotFoundException {
    HashMap<Class, Class> map = new HashMap<>();
    //TODO
    Reflections reflections = new Reflections("com.performizeit");
    Set<Class<?>> annotatedPlugin = reflections.getTypesAnnotatedWith(Plugin.class);

    for (Class cla : annotatedPlugin) {
      if (BasePlugin.class.isAssignableFrom(cla)) {
        invokeGetHelpLine(cla);
        map.put(cla, cla);
      } else {
        System.out.println("ERROR: class " + cla.getName() + " needs to extend BasePlugin child");
      }
    }
    return map;
  }

  private static String invokeGetHelpLine(Class<?> cla) {
    Plugin pluginAnnotation = cla.getAnnotation(Plugin.class);
    return pluginAnnotation.description();
  }


  public static boolean isDataSource(Object o) {
    return DataSource.class.isAssignableFrom(o.getClass());
  }

  public static boolean isDataSourceClass(Class c) {
    return DataSource.class.isAssignableFrom(c);
  }

  public static boolean isOutputerClass(Class c) {
    return Outputer.class.isAssignableFrom(c);
  }

}