com.getperka.flatpack.codexes.DefaultCodexMapper Maven / Gradle / Ivy
/*
* #%L
* FlatPack serialization code
* %%
* Copyright (C) 2012 Perka Inc.
* %%
* 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.
* #L%
*/
package com.getperka.flatpack.codexes;
import static com.getperka.flatpack.util.FlatPackTypes.BOXED_TYPES;
import static com.getperka.flatpack.util.FlatPackTypes.PRIMITIVE_TYPES;
import static com.getperka.flatpack.util.FlatPackTypes.box;
import static com.getperka.flatpack.util.FlatPackTypes.erase;
import static com.getperka.flatpack.util.FlatPackTypes.getParameterization;
import static com.getperka.flatpack.util.FlatPackTypes.getSingleParameterization;
import java.lang.reflect.Constructor;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.Map;
import java.util.UUID;
import org.joda.time.DateTimeZone;
import com.getperka.flatpack.HasUuid;
import com.getperka.flatpack.ext.Codex;
import com.getperka.flatpack.ext.CodexMapper;
import com.getperka.flatpack.ext.TypeContext;
import com.getperka.flatpack.ext.TypeHint;
import com.google.gson.JsonElement;
/**
* Support for all built-in types.
*/
public class DefaultCodexMapper implements CodexMapper {
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public Codex getCodex(TypeContext context, Type type) {
Codex toReturn = null;
Class erased = erase(type);
// Collections and collection-like objects
if (Collection.class.isAssignableFrom(erased)) {
Type valueType = getSingleParameterization(type, Collection.class);
toReturn = new CollectionCodex(erased, context.getCodex(valueType));
} else if (erased.isArray()) {
// Treat an array like a list
Class valueType = erased.getComponentType();
toReturn = new ArrayCodex(valueType, context.getCodex(valueType));
} else if (Map.class.isAssignableFrom(erased)) {
// Maps can be or
Type[] params = getParameterization(Map.class, type);
if (HasUuid.class.isAssignableFrom(erase(params[0]))) {
toReturn = new EntityMapCodex((EntityCodex) context.getCodex(params[0]),
context.getCodex(params[1]));
} else {
toReturn = new StringMapCodex(context.getCodex(params[1]));
}
// Scalar types below here
} else if (Boolean.class.equals(erased) || boolean.class.equals(erased)) {
toReturn = new BooleanCodex();
} else if (CharSequence.class.isAssignableFrom(erased)) {
toReturn = new StringCodex();
} else if (Class.class.equals(erased)) {
toReturn = new HasUuidClassCodex();
} else if (DateTimeZone.class.isAssignableFrom(erased)) {
toReturn = new DateTimeZoneCodex();
} else if (Enum.class.isAssignableFrom(erased)) {
toReturn = new EnumCodex(erased);
} else if (HasUuid.class.isAssignableFrom(erased)) {
toReturn = new EntityCodex(erased);
} else if (JsonElement.class.isAssignableFrom(erased)) {
toReturn = new JsonElementCodex();
} else if (TypeHint.class.isAssignableFrom(erased)) {
toReturn = new TypeHintCodex();
} else if (UUID.class.equals(erased)) {
toReturn = new UUIDCodex();
} else if (Void.class.equals(erased) || void.class.equals(erased)) {
toReturn = new VoidCodex();
} else if (BOXED_TYPES.contains(erased)) {
toReturn = new NumberCodex(erased);
} else if (PRIMITIVE_TYPES.contains(erased)) {
toReturn = new NumberCodex(box(erased));
} else {
/*
* Try to find a one-arg String or Object constructor. This is kind of shady, but it works for
* a number of the auxiliary value types used in the model classes, mainly joda-time.
*/
try {
Constructor constructor = erased.getConstructor(String.class);
toReturn = new ToStringCodex(constructor);
} catch (NoSuchMethodException expected) {}
try {
Constructor constructor = erased.getConstructor(Object.class);
toReturn = new ToStringCodex(constructor);
} catch (NoSuchMethodException expected) {}
}
return toReturn;
}
}