/sigmah/src/test/java/org/sigmah/MockDb.java

http://sigma-h.googlecode.com/ · Java · 86 lines · 60 code · 22 blank · 4 comment · 13 complexity · 66ebfa6859be21bdcb2716a5e477e390 MD5 · raw file

  1. /*
  2. * All Sigmah code is released under the GNU General Public License v3
  3. * See COPYRIGHT.txt and LICENSE.txt.
  4. */
  5. package org.sigmah;
  6. import javax.persistence.Id;
  7. import org.sigmah.shared.dao.DAO;
  8. import java.lang.reflect.*;
  9. import java.util.ArrayList;
  10. import java.util.List;
  11. public class MockDb {
  12. private List entities = new ArrayList(0);
  13. public MockDb() {
  14. }
  15. public Object findById(Class entityClass, Object primaryKey) {
  16. if (primaryKey == null) {
  17. return null;
  18. }
  19. for (Object entity : entities) {
  20. if (entity.getClass().equals(entityClass) && primaryKey.equals(getId(entity))) {
  21. return entity;
  22. }
  23. }
  24. return null;
  25. }
  26. public void persist(Object entity) {
  27. entities.add(entity);
  28. }
  29. private Object getId(Object t) {
  30. for (Method method : t.getClass().getMethods()) {
  31. if (method.getAnnotation(Id.class) != null) {
  32. try {
  33. return method.invoke(t);
  34. } catch (Exception e) {
  35. throw new RuntimeException(e);
  36. }
  37. }
  38. }
  39. throw new RuntimeException("No @Id field!");
  40. }
  41. public <S extends DAO> S getDAO(Class<S> daoSubClass) {
  42. ClassLoader cl = daoSubClass.getClassLoader();
  43. Type daoClass = daoSubClass.getGenericInterfaces()[0];
  44. Class persistentClass = (Class)((ParameterizedType) daoClass).getActualTypeArguments()[0];
  45. return (S) Proxy.newProxyInstance(cl, new Class[]{daoSubClass}, new Handler(persistentClass));
  46. }
  47. public class Handler implements InvocationHandler {
  48. private final Class persistentClass;
  49. public Handler(Class persistentClass) {
  50. this.persistentClass = persistentClass;
  51. }
  52. @Override
  53. public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
  54. if (method.getName().equals("findById")) {
  55. return findById(persistentClass, args[0]);
  56. } else if (method.getName().equals("persist")) {
  57. persist(args[0]);
  58. } else if (method.getReturnType().equals(Boolean.TYPE)) {
  59. return false;
  60. }
  61. return null;
  62. }
  63. }
  64. }