main.okapi.cf.annotations.AnnotationsInfo.java Source code

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Here is the source code for main.okapi.cf.annotations.AnnotationsInfo.java

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/**
 * Copyright 2014 Grafos.ml
 *
 * 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.
 */
package main.okapi.cf.annotations;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Field;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * Used to get JSON info for auto-tuning purposes. Uses reflection to find
 * methods and parameter ranges and spit it out into the stdout.
 * 
 * @author linas
 * 
 */
public class AnnotationsInfo {

    private String topPackage;

    public AnnotationsInfo(String pack) {
        this.topPackage = pack;
    }

    private Iterable<Class> getClasses(String packageName) throws ClassNotFoundException, IOException {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        String path = packageName.replace('.', '/');
        Enumeration<URL> resources = classLoader.getResources(path);
        List<File> dirs = new ArrayList<File>();
        while (resources.hasMoreElements()) {
            URL resource = resources.nextElement();
            dirs.add(new File(resource.getFile()));
        }
        List<Class> classes = new ArrayList<Class>();
        for (File directory : dirs) {
            classes.addAll(findClasses(directory, packageName));
        }

        return classes;
    }

    private List<Class> findClasses(File directory, String packageName) throws ClassNotFoundException {
        List<Class> classes = new ArrayList<Class>();
        if (!directory.exists()) {
            return classes;
        }
        File[] files = directory.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                classes.addAll(findClasses(file, packageName + "." + file.getName()));
            } else if (file.getName().endsWith(".class")) {
                classes.add(Class
                        .forName(packageName + '.' + file.getName().substring(0, file.getName().length() - 6)));
            }
        }
        return classes;
    }

    public JSONObject getInfo() throws ClassNotFoundException, IOException, JSONException {
        JSONObject obj = new JSONObject();
        ArrayList<JSONObject> cl = new ArrayList<JSONObject>();
        Iterable<Class> classes = getClasses(this.topPackage);
        for (Class c : classes) {
            JSONObject forClass = new JSONObject();
            if (c.getAnnotations().length > 0) {

                ArrayList<JSONObject> parameters = new ArrayList<JSONObject>();
                for (Field field : c.getDeclaredFields()) {
                    if (field.isAnnotationPresent(HyperParameter.class)) {
                        HyperParameter hp = field.getAnnotation(HyperParameter.class);
                        JSONObject parJSON = new JSONObject();
                        parJSON.put("parameterName", hp.parameterName());
                        parJSON.put("defaultValue", hp.defaultValue());
                        parJSON.put("minimumValue", hp.minimumValue());
                        parJSON.put("maximumValue", hp.maximumValue());
                        parameters.add(parJSON);
                    }
                }
                JSONObject method = new JSONObject();
                method.put("hyperParameters", parameters);
                method.put("class", c.getCanonicalName());
                cl.add(method);
            }
        }
        obj.put("methods", cl);
        return obj;
    }

    public static void main(String[] args) throws ClassNotFoundException, IOException, JSONException {
        AnnotationsInfo info = new AnnotationsInfo("es.tid.recsys.giraph.ranking");
        System.out.println(info.getInfo());
    }
}