| // Copyright 2008 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.internal.hibernate; |
| |
| import org.apache.tapestry.ValueEncoder; |
| import org.apache.tapestry.ioc.internal.util.Defense; |
| import org.apache.tapestry.ioc.internal.util.InternalUtils; |
| import org.apache.tapestry.ioc.services.PropertyAccess; |
| import org.apache.tapestry.ioc.services.PropertyAdapter; |
| import org.apache.tapestry.ioc.services.TypeCoercer; |
| import org.hibernate.Session; |
| import org.hibernate.mapping.PersistentClass; |
| import org.hibernate.mapping.Property; |
| import org.slf4j.Logger; |
| |
| import java.io.Serializable; |
| |
| public final class HibernateEntityValueEncoder<E> implements ValueEncoder<E> |
| { |
| private final Class<E> entityClass; |
| |
| private final Session session; |
| |
| private final TypeCoercer typeCoercer; |
| |
| private final String idPropertyName; |
| |
| private final PropertyAdapter propertyAdapter; |
| |
| private final Logger logger; |
| |
| public HibernateEntityValueEncoder(Class<E> entityClass, PersistentClass persistentClass, Session session, |
| PropertyAccess propertyAccess, TypeCoercer typeCoercer, Logger logger) |
| { |
| this.entityClass = entityClass; |
| this.session = session; |
| this.typeCoercer = typeCoercer; |
| this.logger = logger; |
| |
| Property property = persistentClass.getIdentifierProperty(); |
| |
| idPropertyName = property.getName(); |
| |
| propertyAdapter = propertyAccess.getAdapter(this.entityClass).getPropertyAdapter(idPropertyName); |
| } |
| |
| |
| public String toClient(E value) |
| { |
| if (value == null) return null; |
| |
| Object id = propertyAdapter.get(value); |
| |
| if (id == null) |
| throw new IllegalStateException(String.format( |
| "Entity %s has an %s property of null; this probably means that it has not been persisted yet.", |
| value, idPropertyName)); |
| |
| return typeCoercer.coerce(id, String.class); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public E toValue(String clientValue) |
| { |
| if (InternalUtils.isBlank(clientValue)) return null; |
| |
| Object id = typeCoercer.coerce(clientValue, propertyAdapter.getType()); |
| |
| Serializable ser = Defense.cast(id, Serializable.class, "id"); |
| |
| E result = (E) session.get(entityClass, ser); |
| |
| if (result == null) |
| { |
| // We don't identify the entity type in the message because the logger is based on the entity type. |
| logger.error(String.format("Unable to convert client value '%s' into an entity instance.", clientValue)); |
| } |
| |
| return result; |
| } |
| |
| } |