Examples with Key com.google.appengine.api.datastore.Key used on opensource projects

Example 76 with Key

use of com.google.appengine.api.datastore.Key in project siena by mandubian.

the class GaePersistenceManager method _deleteSingle.

private void _deleteSingle(Object obj, List<Key> keys, final Key parentKey, final ClassInfo parentInfo, final Field parentField) {
    Class<?> clazz = obj.getClass();
    ClassInfo info = ClassInfo.getClassInfo(clazz);
    Key key;
    if (parentKey == null) {
        key = GaeMappingUtils.getKey(obj);
    } else {
        key = GaeMappingUtils.getKeyFromParent(obj, parentKey, parentInfo, parentField);
    }
    // cascading on aggregated fields
    if (!info.aggregatedFields.isEmpty()) {
        for (Field f : info.aggregatedFields) {
            if (ClassInfo.isModel(f.getType())) {
                Object aggObj = Util.readField(obj, f);
                _deleteSingle(aggObj, keys, key, info, f);
            } else if (ClassInfo.isMany(f)) {
                Many<?> lq = (Many<?>) Util.readField(obj, f);
                if (!lq.asList().isEmpty()) {
                    _deleteMultiple(lq.asQuery().fetchKeys(), keys, key, info, f);
                }
            }
        }
    }
    keys.add(key);
}

Example 77 with Key

use of com.google.appengine.api.datastore.Key in project siena by mandubian.

the class GaePersistenceManager method get.

public <T> int get(Iterable<T> objects) {
    List<Key> keys = new ArrayList<Key>();
    for (Object obj : objects) {
        keys.add(GaeMappingUtils.getKey(obj));
    }
    Map<Key, Entity> entityMap = ds.get(keys);
    for (Object obj : objects) {
        Entity e = entityMap.get(GaeMappingUtils.getKey(obj));
        if (e != null) {
            GaeMappingUtils.fillModel(obj, e);
        }
    }
    return entityMap.size();
}

Example 78 with Key

use of com.google.appengine.api.datastore.Key in project siena by mandubian.

the class GaePersistenceManager method _insertMultiple.

private <T> int _insertMultiple(Iterable<T> objects) {
    List<Entity> entities = new ArrayList<Entity>();
    for (Object obj : objects) {
        Class<?> clazz = obj.getClass();
        ClassInfo info = ClassInfo.getClassInfo(clazz);
        if (info.hasAggregator) {
            Relation rel = (Relation) Util.readField(obj, info.aggregator);
            if (rel != null && rel.mode == RelationMode.AGGREGATION) {
                ClassInfo parentInfo = ClassInfo.getClassInfo(rel.target.getClass());
                Key parentKey = GaeMappingUtils.makeKey(parentInfo, rel.target);
                _insertAddEntity(entities, obj, info, parentKey, parentInfo, (Field) rel.discriminator);
            } else {
                _insertAddEntity(entities, obj, info, null, null, null);
            }
        } else {
            _insertAddEntity(entities, obj, info, null, null, null);
        }
    }
    return _insertPutEntities(entities, objects);
}

Example 79 with Key

use of com.google.appengine.api.datastore.Key in project siena by mandubian.

the class GaePersistenceManager method mapJoins.

protected <T> T mapJoins(Query<T> query, T model) {
    try {
        // join queries
        Map<Field, ArrayList<Key>> fieldMap = GaeQueryUtils.buildJoinFieldKeysMap(query);
        // creates the list of joined entity keys to extract
        for (Field field : fieldMap.keySet()) {
            Key key = GaeMappingUtils.getKey(field.get(model));
            List<Key> keys = fieldMap.get(field);
            if (!keys.contains(key))
                keys.add(key);
        }
        Map<Field, Map<Key, Entity>> entityMap = new HashMap<Field, Map<Key, Entity>>();
        try {
            // retrieves all joined entities per field
            for (Field field : fieldMap.keySet()) {
                Map<Key, Entity> entities = ds.get(fieldMap.get(field));
                entityMap.put(field, entities);
            }
        } catch (Exception ex) {
            throw new SienaException(ex);
        }
        // associates linked models to their models
        // linkedModels is just a map to contain entities already mapped
        Map<Key, Object> linkedModels = new HashMap<Key, Object>();
        Object linkedObj;
        Entity entity;
        for (Field field : fieldMap.keySet()) {
            Object objVal = field.get(model);
            Key key = GaeMappingUtils.getKey(objVal);
            linkedObj = linkedModels.get(key);
            if (linkedObj == null) {
                entity = entityMap.get(field).get(key);
                linkedObj = objVal;
                GaeMappingUtils.fillModel(linkedObj, entity);
                linkedModels.put(key, linkedObj);
            }
            field.set(model, linkedObj);
        }
        return model;
    } catch (IllegalAccessException ex) {
        throw new SienaException(ex);
    }
}

Example 80 with Key

use of com.google.appengine.api.datastore.Key in project siena by mandubian.

the class GaePersistenceManager method mapJoins.

protected <T> List<T> mapJoins(Query<T> query, List<T> models) {
    try {
        // join queries
        Map<Field, ArrayList<Key>> fieldMap = GaeQueryUtils.buildJoinFieldKeysMap(query);
        // creates the list of joined entity keys to extract
        for (final T model : models) {
            for (Field field : fieldMap.keySet()) {
                Object objVal = Util.readField(model, field);
                // our object is not linked to another object...so it doesn't have any key
                if (objVal == null) {
                    continue;
                }
                Key key = GaeMappingUtils.getKey(objVal);
                List<Key> keys = fieldMap.get(field);
                if (!keys.contains(key))
                    keys.add(key);
            }
        }
        Map<Field, Map<Key, Entity>> entityMap = new HashMap<Field, Map<Key, Entity>>();
        try {
            // retrieves all joined entities per field
            for (Field field : fieldMap.keySet()) {
                Map<Key, Entity> entities = ds.get(fieldMap.get(field));
                // gets the future here because we need it so we wait for it
                entityMap.put(field, entities);
            }
        } catch (Exception ex) {
            throw new SienaException(ex);
        }
        // associates linked models to their models
        // linkedModels is just a map to contain entities already mapped
        Map<Key, Object> linkedModels = new HashMap<Key, Object>();
        Object linkedObj;
        Entity entity;
        for (final T model : models) {
            for (Field field : fieldMap.keySet()) {
                Object objVal = Util.readField(model, field);
                // our object is not linked to another object...so it doesn't have any key
                if (objVal == null) {
                    continue;
                }
                Key key = GaeMappingUtils.getKey(objVal);
                linkedObj = linkedModels.get(key);
                if (linkedObj == null) {
                    entity = entityMap.get(field).get(key);
                    linkedObj = objVal;
                    GaeMappingUtils.fillModel(linkedObj, entity);
                    linkedModels.put(key, linkedObj);
                }
                field.set(model, linkedObj);
            }
        }
        return models;
    } catch (IllegalAccessException ex) {
        throw new SienaException(ex);
    }
}