com.arangodb.entity.EntityFactory Maven / Gradle / Ivy
/*
* Copyright (C) 2012 tamtam180
*
* 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 com.arangodb.entity;
import java.io.StringWriter;
import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.Iterator;
import com.arangodb.annotations.DocumentKey;
import com.arangodb.annotations.Exclude;
import com.arangodb.entity.CollectionEntity.Figures;
import com.arangodb.entity.EntityDeserializers.CollectionKeyOptionDeserializer;
import com.arangodb.entity.marker.VertexEntity;
import com.arangodb.http.JsonSequenceEntity;
import com.google.gson.ExclusionStrategy;
import com.google.gson.FieldAttributes;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.FieldNamingStrategy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
/**
* Entity factory , internally used.
*
* @author tamtam180 - kirscheless at gmail.com
*/
public class EntityFactory {
private static Gson gson;
private static Gson gsonNull;
private EntityFactory() {
// this is a helper class
}
public static GsonBuilder getGsonBuilder() {
return new GsonBuilder().addSerializationExclusionStrategy(new ExcludeExclusionStrategy(true))
.addDeserializationExclusionStrategy(new ExcludeExclusionStrategy(false))
.setFieldNamingStrategy(new ArangoFieldNamingStrategy())
.registerTypeAdapter(CollectionStatus.class, new CollectionStatusTypeAdapter())
.registerTypeAdapter(CollectionEntity.class, new EntityDeserializers.CollectionEntityDeserializer())
.registerTypeAdapter(DocumentEntity.class, new EntityDeserializers.DocumentEntityDeserializer())
.registerTypeAdapter(DocumentsEntity.class, new EntityDeserializers.DocumentsEntityDeserializer())
.registerTypeAdapter(AqlFunctionsEntity.class, new EntityDeserializers.AqlfunctionsEntityDeserializer())
.registerTypeAdapter(JobsEntity.class, new EntityDeserializers.JobsEntityDeserializer())
.registerTypeAdapter(ArangoVersion.class, new EntityDeserializers.VersionDeserializer())
.registerTypeAdapter(ArangoUnixTime.class, new EntityDeserializers.ArangoUnixTimeDeserializer())
.registerTypeAdapter(DefaultEntity.class, new EntityDeserializers.DefaultEntityDeserializer())
.registerTypeAdapter(Figures.class, new EntityDeserializers.FiguresDeserializer())
.registerTypeAdapter(CursorEntity.class, new EntityDeserializers.CursorEntityDeserializer())
.registerTypeAdapter(IndexEntity.class, new EntityDeserializers.IndexEntityDeserializer())
.registerTypeAdapter(IndexesEntity.class, new EntityDeserializers.IndexesEntityDeserializer())
.registerTypeAdapter(ScalarExampleEntity.class,
new EntityDeserializers.ScalarExampleEntityDeserializer())
.registerTypeAdapter(SimpleByResultEntity.class,
new EntityDeserializers.SimpleByResultEntityDeserializer())
.registerTypeAdapter(TransactionResultEntity.class,
new EntityDeserializers.TransactionResultEntityDeserializer())
.registerTypeAdapter(AdminLogEntity.class, new EntityDeserializers.AdminLogEntryEntityDeserializer())
.registerTypeAdapter(StatisticsEntity.class, new EntityDeserializers.StatisticsEntityDeserializer())
.registerTypeAdapter(StatisticsDescriptionEntity.class,
new EntityDeserializers.StatisticsDescriptionEntityDeserializer())
.registerTypeAdapter(UserEntity.class, new EntityDeserializers.UserEntityDeserializer())
.registerTypeAdapter(ImportResultEntity.class, new EntityDeserializers.ImportResultEntityDeserializer())
.registerTypeAdapter(DatabaseEntity.class, new EntityDeserializers.DatabaseEntityDeserializer())
.registerTypeAdapter(StringsResultEntity.class,
new EntityDeserializers.StringsResultEntityDeserializer())
.registerTypeAdapter(BooleanResultEntity.class,
new EntityDeserializers.BooleanResultEntityDeserializer())
.registerTypeAdapter(Endpoint.class, new EntityDeserializers.EndpointDeserializer())
.registerTypeAdapter(DocumentResultEntity.class,
new EntityDeserializers.DocumentResultEntityDeserializer())
.registerTypeAdapter(CollectionKeyOptionDeserializer.class,
new EntityDeserializers.CollectionKeyOptionDeserializer())
.registerTypeAdapter(ReplicationInventoryEntity.class,
new EntityDeserializers.ReplicationInventoryEntityDeserializer())
.registerTypeAdapter(ReplicationDumpRecord.class,
new EntityDeserializers.ReplicationDumpRecordDeserializer())
.registerTypeAdapter(ReplicationSyncEntity.class,
new EntityDeserializers.ReplicationSyncEntityDeserializer())
.registerTypeAdapter(MapAsEntity.class, new EntityDeserializers.MapAsEntityDeserializer())
.registerTypeAdapter(ReplicationLoggerConfigEntity.class,
new EntityDeserializers.ReplicationLoggerConfigEntityDeserializer())
.registerTypeAdapter(ReplicationApplierConfigEntity.class,
new EntityDeserializers.ReplicationApplierConfigEntityDeserializer())
.registerTypeAdapter(ReplicationApplierState.class,
new EntityDeserializers.ReplicationApplierStateDeserializer())
.registerTypeAdapter(ReplicationApplierStateEntity.class,
new EntityDeserializers.ReplicationApplierStateEntityDeserializer())
.registerTypeAdapter(ReplicationLoggerStateEntity.class,
new EntityDeserializers.ReplicationLoggerStateEntityDeserializer())
.registerTypeAdapter(ReplicationLoggerStateEntity.Client.class,
new EntityDeserializers.ReplicationLoggerStateEntityClientDeserializer())
.registerTypeAdapter(BaseDocument.class, new EntityDeserializers.BaseDocumentDeserializer())
.registerTypeAdapter(BaseDocument.class, new EntitySerializers.BaseDocumentSerializer())
.registerTypeAdapter(GraphEntity.class, new EntityDeserializers.GraphEntityDeserializer())
.registerTypeAdapter(GraphsEntity.class, new EntityDeserializers.GraphsEntityDeserializer())
.registerTypeAdapter(DeletedEntity.class, new EntityDeserializers.DeleteEntityDeserializer())
.registerTypeAdapter(VertexEntity.class, new EntityDeserializers.VertexEntityDeserializer())
.registerTypeAdapter(EdgeEntity.class, new EntityDeserializers.EdgeEntityDeserializer())
.registerTypeAdapter(TraversalEntity.class, new EntityDeserializers.TraversalEntityDeserializer())
.registerTypeAdapter(ShortestPathEntity.class, new EntityDeserializers.ShortestPathEntityDeserializer())
.registerTypeAdapter(QueryCachePropertiesEntity.class,
new EntityDeserializers.QueryCachePropertiesEntityDeserializer())
.registerTypeAdapter(QueriesResultEntity.class,
new EntityDeserializers.QueriesResultEntityDeserializer())
.registerTypeAdapter(QueryTrackingPropertiesEntity.class,
new EntityDeserializers.QueryTrackingPropertiesEntityDeserializer())
.setDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
}
static {
configure(getGsonBuilder());
}
/**
* Configures instances of Gson used by this factory.
*
* @param builders
* one or two GsonBuilder instances. If only one is provided it
* will be used for initializing both gson and
* gsonNull fields (latter with
* serializeNulls() called prior to creating). If
* two are given - first initializes gson field,
* second initializes gsonNull (used when
* serialization of nulls is requested).
*/
public static void configure(GsonBuilder... builders) {
if (builders.length < 1) {
throw new IllegalArgumentException("builders");
}
gson = builders[0].create();
if (builders.length > 1) {
gsonNull = builders[1].create();
} else {
// use the first one again, but with nulls serialization turned on
gsonNull = builders[0].serializeNulls().create();
}
}
public static T createEntity(String jsonText, Type type) {
return gson.fromJson(jsonText, type);
}
public static String toJsonString(T obj) {
return toJsonString(obj, false);
}
public static JsonSequenceEntity toJsonSequenceEntity(Iterator itr) {
return new JsonSequenceEntity(itr, gson);
}
public static String toImportHeaderValues(Collection> headerValues) {
StringWriter writer = new StringWriter();
for (Collection array : headerValues) {
gson.toJson(array, writer);
writer.write('\n');
}
writer.flush();
return writer.toString();
}
public static String toJsonString(T obj, boolean includeNullValue) {
return includeNullValue ? gsonNull.toJson(obj) : gson.toJson(obj);
}
/**
* @param obj
* @param includeNullValue
* @return a JsonElement object
* @since 1.4.0
*/
public static JsonElement toJsonElement(T obj, boolean includeNullValue) {
return includeNullValue ? gsonNull.toJsonTree(obj) : gson.toJsonTree(obj);
}
/**
* @author tamtam180 - kirscheless at gmail.com
* @since 1.4.0
*/
private static class ExcludeExclusionStrategy implements ExclusionStrategy {
private boolean serialize;
public ExcludeExclusionStrategy(boolean serialize) {
this.serialize = serialize;
}
@Override
public boolean shouldSkipField(FieldAttributes f) {
Exclude annotation = f.getAnnotation(Exclude.class);
if (annotation != null && (serialize ? annotation.serialize() : annotation.deserialize())) {
return true;
}
return false;
}
@Override
public boolean shouldSkipClass(Class clazz) {
return false;
}
}
private static class ArangoFieldNamingStrategy implements FieldNamingStrategy {
private static final String KEY = "_key";
@Override
public String translateName(Field f) {
DocumentKey key = f.getAnnotation(DocumentKey.class);
if (key == null) {
return FieldNamingPolicy.IDENTITY.translateName(f);
}
return KEY;
}
}
}
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