com.romb.hashfon.helper.Helper.java Source code

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Here is the source code for com.romb.hashfon.helper.Helper.java

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package com.romb.hashfon.helper;

import com.romb.hashfon.domain.Hr;
import com.romb.hashfon.domain.Student;
import java.lang.reflect.Field;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

/**
 *
 * @author Marko
 */
public class Helper {

    AbstractTokenCreator tokenHelper;

    public AbstractTokenCreator getAbstractToken() {
        return tokenHelper;
    }

    public Helper() {
        tokenHelper = new Base64Token();
    }

    public String getJson(List list) {
        JSONArray jsonList = new JSONArray();
        for (Object o : list) {
            JSONObject obj1 = new JSONObject();
            for (Field field : o.getClass().getDeclaredFields()) {
                if (!field.getName().equals("serialVersionUID")) {
                    field.setAccessible(true);
                    String s = "";
                    try {
                        s = field.get(o) + "";
                    } catch (IllegalArgumentException | IllegalAccessException ex) {
                        Logger.getLogger(Helper.class.getName()).log(Level.SEVERE, null, ex);
                    }
                    obj1.put(field.getName(), s);
                }
            }
            jsonList.add(obj1);
        }
        return jsonList.toJSONString();
    }

    public boolean isStudentLogged(String[] token) {
        try {
            EntityManager em = getEntityManager();
            if (token[1].equals("STUDENT")) {
                Student s = em.find(Student.class, Long.parseLong(token[2]));
                return s != null;
            } else {
                return false;
            }
        } catch (Exception e) {
            return false;
        }
    }

    public boolean isKompanijaLogged(String[] token) {
        try {
            EntityManager em = getEntityManager();
            if (token[1].equals("KOMPANIJA")) {
                Hr hr = (Hr) em.createNamedQuery("Hr.findById").setParameter("id", Long.parseLong(token[2]))
                        .getSingleResult();
                return hr != null;
            } else {
                return false;
            }
        } catch (Exception e) {
            return false;
        }
    }

    public boolean isLogged(String[] token) {
        try {
            EntityManager em = getEntityManager();
            if (token[1].equals("STUDENT")) {
                Student s = em.find(Student.class, Long.parseLong(token[2]));
                return s != null;
            } else {
                Hr hr = (Hr) em.createNamedQuery("Hr.findById").setParameter("id", Long.parseLong(token[2]))
                        .getSingleResult();
                return hr != null;
            }
        } catch (Exception e) {
            return false;
        }
    }

    public EntityManager getEntityManager() {
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("com.romb_hashfon_war_1.0PU");
        EntityManager ecm = emf.createEntityManager();
        return ecm;
    }

    public void persistObject(EntityManager em, Object o) {
        em.getTransaction().begin();
        em.persist(o);
        em.getTransaction().commit();
    }

    public void removeObject(EntityManager em, Object o, Long id) {
        em.getTransaction().begin();
        em.remove(o);
        em.getTransaction().commit();
    }

    public void mergeObject(EntityManager em, Object o) {
        em.getTransaction().begin();
        em.merge(o);
        em.getTransaction().commit();
    }

}