Examples of com.github.jmkgreen.morphia.Key

com.github.jmkgreen.morphia.Key

The key object; this class is take from the app-engine datastore (mostly) implementation. It is also Serializable and GWT-safe, enabling your entity objects to be used for GWT RPC should you so desire.

You may use normal DBRef objects as relationships in your entities if you desire neither type safety nor GWTability.
@author Jeff Schnitzer (from Objectify codebase) @author Scott Hernandez (adapted to morphia/mongodb)

            }
            MappedClass mappedClass = mapr.getMappedClass(entity);
            Object id = mappedClass.getIdField().get(entity);
            if (id == null)
                throw new MappingException("@Id field cannot be null!");
            Key key = new Key(mappedClass.getCollectionName(), id);
            return key;
        } catch (IllegalAccessException iae) {
            throw new RuntimeException(iae);
        }
    }

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            mf.setFieldValue(entity, references);
        }
    }


    boolean exists(Class c, final DBRef dbRef, EntityCache cache, Mapper mapr) {
        Key key = mapr.refToKey(dbRef);
        Boolean cached = cache.exists(key);
        if (cached != null)
            return cached;


        Datastore dsi = mapr.getDatastoreProvider().get();

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    Object resolveObject(final DBRef dbRef, final MappedField mf, EntityCache cache, Mapper mapr) {
        if (dbRef == null)
            return null;


        Key key = mapr.createKey(mf.isSingleValue() ? mf.getType() : mf.getSubClass(), dbRef.getId());


        Object cached = cache.getEntity(key);
        if (cached != null)
            return cached;

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        }
        mf.setFieldValue(entity, m);
    }


    private Object createOrReuseProxy(final Class referenceObjClass, final DBRef dbRef, EntityCache cache, Mapper mapr) {
        Key key = mapr.refToKey(dbRef);
        Object proxyAlreadyCreated = cache.getProxy(key);
        if (proxyAlreadyCreated != null) {
            return proxyAlreadyCreated;
        }
        Object newProxy = mapr.getProxyFactory().createProxy(referenceObjClass, key, mapr.getDatastoreProvider());

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        // check the history key (a key is the namespace + id)


        if (dbObject.containsField(ID_KEY) && getMappedClass(entity).getIdField() != null
                && getMappedClass(entity).getEntityAnnotation() != null) {
            Key key = new Key(entity.getClass(), dbObject.get(ID_KEY));
            Object cachedInstance = cache.getEntity(key);
            if (cachedInstance != null)
                return cachedInstance;
            else
                cache.putEntity(key, entity); // to avoid stackOverflow in recursive refs
        }


        MappedClass mc = getMappedClass(entity);


        dbObject = (DBObject) mc.callLifecycleMethods(PreLoad.class, entity, dbObject, this);
        try {
            for (MappedField mf : mc.getMappedFields()) {
                readMappedField(dbObject, mf, entity, cache);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }


        if (dbObject.containsField(ID_KEY) && getMappedClass(entity).getIdField() != null) {
            Key key = new Key(entity.getClass(), dbObject.get(ID_KEY));
            cache.putEntity(key, entity);
        }
        mc.callLifecycleMethods(PostLoad.class, entity, dbObject, this);
        return entity;
    }

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Related Classes of com.github.jmkgreen.morphia.Key

com.github.jmkgreen.morphia.mapping.DefaultMapper

com.github.jmkgreen.morphia.mapping.ReferenceMapper

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