Examples of org.mongodb.morphia.mapping.MappingException

org.mongodb.morphia.mapping.MappingException
@author Olafur Gauti Gudmundsson

    }


    public <T> WriteResult delete(final T entity, final WriteConcern wc) {
        final T wrapped = ProxyHelper.unwrap(entity);
        if (wrapped instanceof Class<?>) {
            throw new MappingException("Did you mean to delete all documents? -- delete(ds.createQuery(???.class))");
        }
        try {
            final Object id = mapper.getId(wrapped);
            return delete(wrapped.getClass(), id, wc);

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    @SuppressWarnings("unchecked")
    public <T> T get(final T entity) {
        final T unwrapped = ProxyHelper.unwrap(entity);
        final Object id = mapper.getId(unwrapped);
        if (id == null) {
            throw new MappingException("Could not get id for " + unwrapped.getClass().getName());
        }
        return (T) get(unwrapped.getClass(), id);
    }

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    private Query<?> buildExistsQuery(final Object entityOrKey) {
        final Object unwrapped = ProxyHelper.unwrap(entityOrKey);
        final Key<?> key = mapper.getKey(unwrapped);
        final Object id = key.getId();
        if (id == null) {
            throw new MappingException("Could not get id for " + unwrapped.getClass().getName());
        }


        String collName = key.getKind();
        if (collName == null) {
            collName = getCollection(key.getKindClass()).getName();

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    }


    private <T> DBObject toDbObject(final T ent, final Map<Object, DBObject> involvedObjects) {
        final MappedClass mc = mapper.getMappedClass(ent);
        if (mc.getAnnotation(NotSaved.class) != null) {
            throw new MappingException(String.format("Entity type: %s is marked as NotSaved which means you should not try to save it!",
                                                     mc.getClazz().getName()));
        }
        DBObject dbObject = entityToDBObj(ent, involvedObjects);
        List<MappedField> versionFields = mc.getFieldsAnnotatedWith(Version.class);
        for (MappedField mappedField : versionFields) {

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     */
    @SuppressWarnings("unchecked")
    protected <T> Key<T> postSaveGetKey(final T entity, final DBObject dbObj, final DBCollection dbColl,
                                        final Map<Object, DBObject> involvedObjects) {
        if (dbObj.get(Mapper.ID_KEY) == null) {
            throw new MappingException("Missing _id after save!");
        }
        mapper.updateKeyInfo(entity, dbObj, createCache());


        postSaveOperations(involvedObjects);
        final Key<T> key = new Key<T>(dbColl.getName(), mapper.getId(entity));

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            throw new UpdateException("Can not persist a null entity");
        }


        final MappedClass mc = mapper.getMappedClass(entity);
        if (mc.getAnnotation(NotSaved.class) != null) {
            throw new MappingException(
                                          "Entity type: " + mc.getClazz().getName()
                                          + " is marked as NotSaved which means you should not try to save it!"
            );
        }

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        final DBObject dbObj = mapper.toDBObject(unwrapped, involvedObjects);
        final Key<T> key = mapper.getKey(unwrapped);
        unwrapped = ProxyHelper.unwrap(unwrapped);
        final Object id = mapper.getId(unwrapped);
        if (id == null) {
            throw new MappingException("Could not get id for " + unwrapped.getClass().getName());
        }


        //remove (immutable) _id field for update.
        final Object idValue = dbObj.get(Mapper.ID_KEY);
        dbObj.removeField(Mapper.ID_KEY);

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  protected void check(final MappedClass mc, final MappedField mf, final Set<ConstraintViolation> ve) {
    if (mf.hasAnnotation(Reference.class)) {
      final Class realType = (mf.isSingleValue()) ? mf.getType() : mf.getSubClass();


      if (realType == null) {
        throw new MappingException("Type is null for this MappedField: " + mf);
      }


      if ((!realType.isInterface() && mc.getMapper().getMappedClass(realType).getIdField() == null)) {
        ve.add(new ConstraintViolation(Level.FATAL, mc, mf, getClass(),
          mf.getFullName() + " is annotated as a @" + Reference.class.getSimpleName() + " but the " + mf.getType().getName()

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                    }
                }
            }
            return this;
        } catch (IOException e) {
            throw new MappingException("Could not get map classes from package " + packageName, e);
        } catch (ClassNotFoundException e) {
            throw new MappingException("Could not get map classes from package " + packageName, e);
        }
    }

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        return fromDBObject(entityClass, dbObject, mapper.createEntityCache());
    }


    public <T> T fromDBObject(final Class<T> entityClass, final DBObject dbObject, final EntityCache cache) {
        if (!entityClass.isInterface() && !mapper.isMapped(entityClass)) {
            throw new MappingException("Trying to map to an unmapped class: " + entityClass.getName());
        }
        try {
            return (T) mapper.fromDBObject(entityClass, dbObject, cache);
        } catch (Exception e) {
            throw new MappingException("Could not map entity from DBObject", e);
        }
    }

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