| /* |
| * Copyright (c) 2012, Paul Merlin. All Rights Reserved. |
| * |
| * 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.qi4j.api.value; |
| |
| import java.io.InputStream; |
| import org.qi4j.api.type.ValueType; |
| import org.qi4j.functional.Function; |
| import org.qi4j.functional.Function2; |
| |
| /** |
| * Use a ValueDeserializer to create new values instances from serialized state. |
| * |
| * <p> |
| * Serialized state must be one of: |
| * </p> |
| * <ul> |
| * <li>a ValueComposite,</li> |
| * <li>an EntityReference,</li> |
| * <li>a Collection,</li> |
| * <li>a Map,</li> |
| * <li>a Plain Value.</li> |
| * </ul> |
| * <p> |
| * Nested plain values, EntityReferences, Collections, Maps, ValueComposites are supported. |
| * EntityReferences are deserialized as their identity string. |
| * </p> |
| * <p> |
| * Plain values can be one of: |
| * </p> |
| * <ul> |
| * <li>String,</li> |
| * <li>Character or char,</li> |
| * <li>Boolean or boolean,</li> |
| * <li>Integer or int,</li> |
| * <li>Long or long,</li> |
| * <li>Short or short,</li> |
| * <li>Byte or byte,</li> |
| * <li>Float or float,</li> |
| * <li>Double or double,</li> |
| * <li>BigInteger,</li> |
| * <li>BigDecimal,</li> |
| * <li>Date,</li> |
| * <li>DateTime (JodaTime),</li> |
| * <li>LocalDateTime (JodaTime),</li> |
| * <li>LocalDate (JodaTime).</li> |
| * </ul> |
| * <p> |
| * Values of unknown types and all arrays are considered as {@link java.io.Serializable} and by so are deserialized |
| * from base64 encoded bytes using pure Java serialization. If it happens that the input is invalid, a |
| * ValueSerializationException is thrown. |
| * </p> |
| * <p> |
| * Having type information in the serialized payload allows to keep actual ValueComposite types and by so |
| * circumvent {@link org.qi4j.api.composite.AmbiguousTypeException} when deserializing. |
| * </p> |
| */ |
| public interface ValueDeserializer |
| { |
| /** |
| * Factory method for a typed deserialize function. |
| * |
| * <p>The returned Function may throw {@link ValueSerializationException}.</p> |
| * |
| * @param type the value type |
| * @param <T> the parametrized function return type |
| * @return a deserialization function |
| */ |
| <T> Function<String, T> deserialize( Class<T> type ); |
| |
| /** |
| * Factory method for a typed deserialize function. |
| * |
| * <p>The returned Function may throw {@link ValueSerializationException}.</p> |
| * |
| * @param valueType the value type |
| * @param <T> the parametrized function return type |
| * @return a deserialization function |
| */ |
| <T> Function<String, T> deserialize( ValueType valueType ); |
| |
| /** |
| * Factory method for an untyped deserialize function. |
| * |
| * <p>The returned Function may throw {@link ValueSerializationException}.</p> |
| * |
| * @param <T> the parametrized function return type |
| * @return a deserialization function |
| */ |
| <T> Function2<ValueType, String, T> deserialize(); |
| |
| /** |
| * Deserialize a value from a state. |
| * |
| * @param <T> the parametrized returned type |
| * @param type the value type |
| * @param input the state |
| * @return the value |
| * @throws ValueSerializationException if the deserialization failed |
| */ |
| <T> T deserialize( Class<?> type, String input ) |
| throws ValueSerializationException; |
| |
| /** |
| * Deserialize a value from a state. |
| * |
| * @param <T> the parametrized returned type |
| * @param valueType the value type |
| * @param input the state |
| * @return the value |
| * @throws ValueSerializationException if the deserialization failed |
| */ |
| <T> T deserialize( ValueType valueType, String input ) |
| throws ValueSerializationException; |
| |
| /** |
| * Deserialize a value from a state. |
| * |
| * @param <T> the parametrized returned type |
| * @param type the value type |
| * @param input the state stream |
| * @return the value |
| * @throws ValueSerializationException if the deserialization failed |
| */ |
| <T> T deserialize( Class<?> type, InputStream input ) |
| throws ValueSerializationException; |
| |
| /** |
| * Deserialize a value from a state. |
| * |
| * @param <T> the parametrized returned type |
| * @param valueType the value type |
| * @param input the state stream |
| * @return the value |
| * @throws ValueSerializationException if the deserialization failed |
| */ |
| <T> T deserialize( ValueType valueType, InputStream input ) |
| throws ValueSerializationException; |
| } |