| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds licenses this file |
| * to you 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.jclouds.json.config; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Type; |
| import java.util.Date; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| import javax.inject.Inject; |
| import javax.inject.Singleton; |
| |
| import org.jclouds.crypto.CryptoStreams; |
| import org.jclouds.date.DateService; |
| import org.jclouds.domain.JsonBall; |
| import org.jclouds.json.Json; |
| import org.jclouds.json.internal.EnumTypeAdapterThatReturnsFromValue; |
| import org.jclouds.json.internal.GsonWrapper; |
| import org.jclouds.json.internal.JsonLiteral; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableMap.Builder; |
| import com.google.common.collect.Maps; |
| import com.google.common.primitives.Bytes; |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| import com.google.gson.JsonDeserializationContext; |
| import com.google.gson.JsonDeserializer; |
| import com.google.gson.JsonElement; |
| import com.google.gson.JsonParseException; |
| import com.google.gson.JsonSerializationContext; |
| import com.google.gson.JsonSerializer; |
| import com.google.gson.TypeAdapter; |
| import com.google.gson.internal.JsonReaderInternalAccess; |
| import com.google.gson.reflect.TypeToken; |
| import com.google.gson.stream.JsonReader; |
| import com.google.gson.stream.JsonWriter; |
| import com.google.inject.AbstractModule; |
| import com.google.inject.ImplementedBy; |
| import com.google.inject.Provides; |
| import com.google.inject.TypeLiteral; |
| |
| /** |
| * Contains logic for parsing objects from Strings. |
| * |
| * @author Adrian Cole |
| */ |
| public class GsonModule extends AbstractModule { |
| |
| @SuppressWarnings("rawtypes") |
| @Provides |
| @Singleton |
| Gson provideGson(JsonBallAdapter jsonAdapter, DateAdapter adapter, ByteListAdapter byteListAdapter, |
| ByteArrayAdapter byteArrayAdapter, PropertiesAdapter propertiesAdapter, JsonAdapterBindings bindings) |
| throws ClassNotFoundException, Exception { |
| GsonBuilder builder = new GsonBuilder(); |
| |
| // simple (type adapters) |
| builder.registerTypeAdapter(Properties.class, propertiesAdapter.nullSafe()); |
| builder.registerTypeAdapter(Date.class, adapter.nullSafe()); |
| builder.registerTypeAdapter(new TypeToken<List<Byte>>() { |
| }.getType(), byteListAdapter.nullSafe()); |
| builder.registerTypeAdapter(byte[].class, byteArrayAdapter.nullSafe()); |
| |
| // complicated (serializers/deserializers as they need context to operate) |
| builder.registerTypeHierarchyAdapter(Enum.class, new EnumTypeAdapterThatReturnsFromValue()); |
| builder.registerTypeAdapter(JsonBall.class, jsonAdapter); |
| |
| for (Map.Entry<Type, Object> binding : bindings.getBindings().entrySet()) { |
| builder.registerTypeAdapter(binding.getKey(), binding.getValue()); |
| } |
| |
| return builder.create(); |
| } |
| |
| // http://code.google.com/p/google-gson/issues/detail?id=326 |
| @ImplementedBy(JsonBallAdapterImpl.class) |
| public static interface JsonBallAdapter extends JsonSerializer<JsonBall>, JsonDeserializer<JsonBall> { |
| |
| } |
| |
| @Singleton |
| public static class JsonBallAdapterImpl implements JsonBallAdapter { |
| |
| public JsonElement serialize(JsonBall src, Type typeOfSrc, JsonSerializationContext context) { |
| return new JsonLiteral(src); |
| } |
| |
| public JsonBall deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) |
| throws JsonParseException { |
| return new JsonBall(json.toString()); |
| } |
| |
| } |
| |
| @ImplementedBy(CDateAdapter.class) |
| public static abstract class DateAdapter extends TypeAdapter<Date> { |
| |
| } |
| |
| @ImplementedBy(HexByteListAdapter.class) |
| public static abstract class ByteListAdapter extends TypeAdapter<List<Byte>> { |
| |
| } |
| |
| @ImplementedBy(HexByteArrayAdapter.class) |
| public static abstract class ByteArrayAdapter extends TypeAdapter<byte[]> { |
| |
| } |
| |
| @Singleton |
| public static class HexByteListAdapter extends ByteListAdapter { |
| |
| @Override |
| public void write(JsonWriter writer, List<Byte> value) throws IOException { |
| writer.value(CryptoStreams.hex(Bytes.toArray(value))); |
| } |
| |
| @Override |
| public List<Byte> read(JsonReader reader) throws IOException { |
| return Bytes.asList(CryptoStreams.hex(reader.nextString())); |
| } |
| |
| } |
| |
| @Singleton |
| public static class HexByteArrayAdapter extends ByteArrayAdapter { |
| |
| @Override |
| public void write(JsonWriter writer, byte[] value) throws IOException { |
| writer.value(CryptoStreams.hex(value)); |
| } |
| |
| @Override |
| public byte[] read(JsonReader reader) throws IOException { |
| return CryptoStreams.hex(reader.nextString()); |
| } |
| } |
| |
| @Singleton |
| public static class Iso8601DateAdapter extends DateAdapter { |
| private final DateService dateService; |
| |
| @Inject |
| public Iso8601DateAdapter(DateService dateService) { |
| this.dateService = dateService; |
| } |
| |
| public void write(JsonWriter writer, Date value) throws IOException { |
| writer.value(dateService.iso8601DateFormat(value)); |
| } |
| |
| public Date read(JsonReader reader) throws IOException { |
| return parseDate(reader.nextString()); |
| } |
| |
| protected Date parseDate(String toParse) { |
| try { |
| return dateService.iso8601DateParse(toParse); |
| } catch (RuntimeException e) { |
| return dateService.iso8601SecondsDateParse(toParse); |
| } |
| } |
| |
| } |
| |
| @Singleton |
| public static class PropertiesAdapter extends TypeAdapter<Properties> { |
| private final Json json; |
| private final Type mapType = new TypeLiteral<Map<String, String>>() { |
| }.getRawType(); |
| |
| @Inject |
| public PropertiesAdapter(Json json) { |
| this.json = json; |
| } |
| |
| @Override |
| public void write(JsonWriter out, Properties value) throws IOException { |
| Builder<String, String> srcMap = ImmutableMap.<String, String> builder(); |
| for (Enumeration<?> propNames = value.propertyNames(); propNames.hasMoreElements();) { |
| String propName = (String) propNames.nextElement(); |
| srcMap.put(propName, value.getProperty(propName)); |
| } |
| out.value(new JsonLiteral(json.toJson(srcMap.build(), mapType))); |
| } |
| |
| @Override |
| public Properties read(JsonReader in) throws IOException { |
| Properties props = new Properties(); |
| in.beginObject(); |
| while (in.hasNext()) { |
| JsonReaderInternalAccess.INSTANCE.promoteNameToValue(in); |
| props.setProperty(in.nextString(), in.nextString()); |
| } |
| in.endObject(); |
| return props; |
| } |
| |
| } |
| |
| @Singleton |
| public static class CDateAdapter extends DateAdapter { |
| private final DateService dateService; |
| |
| @Inject |
| public CDateAdapter(DateService dateService) { |
| this.dateService = dateService; |
| } |
| |
| public void write(JsonWriter writer, Date value) throws IOException { |
| writer.value(dateService.cDateFormat(value)); |
| } |
| |
| public Date read(JsonReader reader) throws IOException { |
| return dateService.cDateParse(reader.nextString()); |
| } |
| |
| } |
| |
| @Singleton |
| public static class LongDateAdapter extends DateAdapter { |
| |
| public void write(JsonWriter writer, Date value) throws IOException { |
| writer.value(value.getTime()); |
| } |
| |
| public Date read(JsonReader reader) throws IOException { |
| long toParse = reader.nextLong(); |
| if (toParse == -1) |
| return null; |
| return new Date(toParse); |
| } |
| } |
| |
| @Singleton |
| public static class JsonAdapterBindings { |
| private final Map<Type, Object> bindings = Maps.newHashMap(); |
| |
| @com.google.inject.Inject(optional = true) |
| public void setBindings(Map<Type, Object> bindings) { |
| this.bindings.putAll(bindings); |
| } |
| |
| public Map<Type, Object> getBindings() { |
| return bindings; |
| } |
| } |
| |
| @Override |
| protected void configure() { |
| bind(Json.class).to(GsonWrapper.class); |
| } |
| } |