List of usage examples for com.google.gson TypeAdapter TypeAdapter
TypeAdapter
From source file:BundleTypeAdapterFactory.java
License:Apache License
@SuppressWarnings("unchecked") @Override//w w w . j a v a 2 s. c o m public <T> TypeAdapter<T> create(final Gson gson, TypeToken<T> type) { if (!Bundle.class.isAssignableFrom(type.getRawType())) { return null; } return (TypeAdapter<T>) new TypeAdapter<Bundle>() { @Override public void write(JsonWriter out, Bundle bundle) throws IOException { if (bundle == null) { out.nullValue(); return; } out.beginObject(); for (String key : bundle.keySet()) { out.name(key); Object value = bundle.get(key); if (value == null) { out.nullValue(); } else { gson.toJson(value, value.getClass(), out); } } out.endObject(); } @Override public Bundle read(JsonReader in) throws IOException { switch (in.peek()) { case NULL: in.nextNull(); return null; case BEGIN_OBJECT: return toBundle(readObject(in)); default: throw new IOException("expecting object: " + in.getPath()); } } private Bundle toBundle(List<Pair<String, Object>> values) throws IOException { Bundle bundle = new Bundle(); for (Pair<String, Object> entry : values) { String key = entry.first; Object value = entry.second; if (value instanceof String) { bundle.putString(key, (String) value); } else if (value instanceof Integer) { bundle.putInt(key, ((Integer) value).intValue()); } else if (value instanceof Long) { bundle.putLong(key, ((Long) value).longValue()); } else if (value instanceof Double) { bundle.putDouble(key, ((Double) value).doubleValue()); } else if (value instanceof Parcelable) { bundle.putParcelable(key, (Parcelable) value); } else if (value instanceof List) { List<Pair<String, Object>> objectValues = (List<Pair<String, Object>>) value; Bundle subBundle = toBundle(objectValues); bundle.putParcelable(key, subBundle); } else { throw new IOException("Unparcelable key, value: " + key + ", " + value); } } return bundle; } private List<Pair<String, Object>> readObject(JsonReader in) throws IOException { List<Pair<String, Object>> object = new ArrayList<Pair<String, Object>>(); in.beginObject(); while (in.peek() != JsonToken.END_OBJECT) { switch (in.peek()) { case NAME: String name = in.nextName(); Object value = readValue(in); object.add(new Pair<String, Object>(name, value)); break; case END_OBJECT: break; default: throw new IOException("expecting object: " + in.getPath()); } } in.endObject(); return object; } private Object readValue(JsonReader in) throws IOException { switch (in.peek()) { case BEGIN_ARRAY: return readArray(in); case BEGIN_OBJECT: return readObject(in); case BOOLEAN: return in.nextBoolean(); case NULL: in.nextNull(); return null; case NUMBER: return readNumber(in); case STRING: return in.nextString(); default: throw new IOException("expecting value: " + in.getPath()); } } private Object readNumber(JsonReader in) throws IOException { double doubleValue = in.nextDouble(); if (doubleValue - Math.ceil(doubleValue) == 0) { long longValue = (long) doubleValue; if (longValue >= Integer.MIN_VALUE && longValue <= Integer.MAX_VALUE) { return (int) longValue; } return longValue; } return doubleValue; } @SuppressWarnings("rawtypes") private List readArray(JsonReader in) throws IOException { List list = new ArrayList(); in.beginArray(); while (in.peek() != JsonToken.END_ARRAY) { Object element = readValue(in); list.add(element); } in.endArray(); return list; } }; }
From source file:RestrictSerializationToBaseClassFactory.java
License:Apache License
@Override public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { Class incoming = type.getRawType(); if (subClasses != null) { boolean matched = false; for (Class<? extends B> subClass : subClasses) { if (incoming == subClass) { matched = true;//from w w w . j av a 2 s .com break; } } if (!matched) return null; } else { // restricting all sub-classes since none specified // don't match the baseClass since we want to use the default factory for it if (incoming == baseClass || !baseClass.isAssignableFrom(incoming)) return null; } TypeAdapter<T> adapter = new TypeAdapter<T>() { @Override public T read(JsonReader reader) throws IOException { final TypeAdapter subAdapter = gson.getDelegateAdapter(RestrictSerializationToBaseClassFactory.this, type); return (T) subAdapter.read(reader); } @Override public void write(JsonWriter writer, T value) throws IOException { final TypeAdapter<B> baseAdapter = gson.getAdapter(baseClass); baseAdapter.write(writer, (B) value); } }; return adapter; }
From source file:ca.ualberta.cs.team1travelexpenseapp.gsonUtils.RuntimeTypeAdapterFactory.java
License:Apache License
public <R> TypeAdapter<R> create(Gson gson, TypeToken<R> type) { if (type.getRawType() != baseType) { return null; }/*from w w w . ja v a 2 s .co m*/ final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<String, TypeAdapter<?>>(); final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<Class<?>, TypeAdapter<?>>(); for (Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) { TypeAdapter<?> delegate = gson.getDelegateAdapter(this, TypeToken.get(entry.getValue())); labelToDelegate.put(entry.getKey(), delegate); subtypeToDelegate.put(entry.getValue(), delegate); } return new TypeAdapter<R>() { @Override public R read(JsonReader in) throws IOException { JsonElement jsonElement = Streams.parse(in); JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName); if (labelJsonElement == null) { throw new JsonParseException("cannot deserialize " + baseType + " because it does not define a field named " + typeFieldName); } String label = labelJsonElement.getAsString(); @SuppressWarnings("unchecked") // registration requires that subtype extends T TypeAdapter<R> delegate = (TypeAdapter<R>) labelToDelegate.get(label); if (delegate == null) { throw new JsonParseException("cannot deserialize " + baseType + " subtype named " + label + "; did you forget to register a subtype?"); } return delegate.fromJsonTree(jsonElement); } @Override public void write(JsonWriter out, R value) throws IOException { Class<?> srcType = value.getClass(); String label = subtypeToLabel.get(srcType); @SuppressWarnings("unchecked") // registration requires that subtype extends T TypeAdapter<R> delegate = (TypeAdapter<R>) subtypeToDelegate.get(srcType); if (delegate == null) { throw new JsonParseException( "cannot serialize " + srcType.getName() + "; did you forget to register a subtype?"); } JsonObject jsonObject = delegate.toJsonTree(value).getAsJsonObject(); if (jsonObject.has(typeFieldName)) { throw new JsonParseException("cannot serialize " + srcType.getName() + " because it already defines a field named " + typeFieldName); } JsonObject clone = new JsonObject(); clone.add(typeFieldName, new JsonPrimitive(label)); for (Map.Entry<String, JsonElement> e : jsonObject.entrySet()) { clone.add(e.getKey(), e.getValue()); } Streams.write(clone, out); } }; }
From source file:cc.kave.commons.utils.json.RuntimeTypeAdapterFactory.java
License:Apache License
public <R> TypeAdapter<R> create(Gson gson, TypeToken<R> type) { if (type.getRawType() != baseType) { return null; }// ww w. ja v a 2 s . co m final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<String, TypeAdapter<?>>(); final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<Class<?>, TypeAdapter<?>>(); for (Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) { TypeAdapter<?> delegate = gson.getDelegateAdapter(this, TypeToken.get(entry.getValue())); labelToDelegate.put(entry.getKey(), delegate); subtypeToDelegate.put(entry.getValue(), delegate); } return new TypeAdapter<R>() { @Override public R read(JsonReader in) throws IOException { JsonElement jsonElement = Streams.parse(in); // (kave adaptation) was: ".remove(typeFiledName)" JsonElement labelJsonElement = jsonElement.getAsJsonObject().get(typeFieldName); if (labelJsonElement == null) { throw new JsonParseException("cannot deserialize " + baseType + " because it does not define a field named " + typeFieldName); } String label = labelJsonElement.getAsString(); @SuppressWarnings("unchecked") // registration requires that // subtype extends T TypeAdapter<R> delegate = (TypeAdapter<R>) labelToDelegate.get(label); if (delegate == null) { throw new JsonParseException("cannot deserialize " + baseType + " subtype named " + label + "; did you forget to register a subtype?"); } return delegate.fromJsonTree(jsonElement); } @Override public void write(JsonWriter out, R value) throws IOException { if (value == null) { Streams.write(null, out); return; } Class<?> srcType = value.getClass(); String label = subtypeToLabel.get(srcType); @SuppressWarnings("unchecked") // registration requires that // subtype extends T TypeAdapter<R> delegate = (TypeAdapter<R>) subtypeToDelegate.get(srcType); if (delegate == null) { throw new JsonParseException( "cannot serialize " + srcType.getName() + "; did you forget to register a subtype?"); } JsonObject jsonObject = delegate.toJsonTree(value).getAsJsonObject(); // (kave adaptation) disabled check // if (jsonObject.has(typeFieldName)) { // throw new JsonParseException("cannot serialize " + // srcType.getName() // + " because it already defines a field named " + // typeFieldName); // } JsonObject clone = new JsonObject(); clone.add(typeFieldName, new JsonPrimitive(label)); for (Map.Entry<String, JsonElement> e : jsonObject.entrySet()) { clone.add(e.getKey(), e.getValue()); } Streams.write(clone, out); } }; }
From source file:co.aurasphere.botmill.kik.util.json.LowerCaseTypeAdapterFactory.java
License:Open Source License
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class); final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { @Override//from w ww .j a va 2 s .c o m public T read(JsonReader in) throws IOException { JsonElement tree = elementAdapter.read(in); afterRead(tree); return delegate.fromJsonTree(tree); } @Override public void write(JsonWriter out, T value) throws IOException { JsonElement tree = delegate.toJsonTree(value); beforeWrite(value, tree); elementAdapter.write(out, tree); } protected void beforeWrite(T source, JsonElement toSerialize) { } protected void afterRead(JsonElement deserialized) { if (deserialized instanceof JsonObject) { JsonObject jsonObject = ((JsonObject) deserialized); Set<Map.Entry<String, JsonElement>> entrySet = jsonObject.entrySet(); for (Map.Entry<String, JsonElement> entry : entrySet) { if (entry.getValue() instanceof JsonElement) { if (entry.getKey().equalsIgnoreCase("type")) { String val = jsonObject.get(entry.getKey()).toString(); jsonObject.addProperty(entry.getKey(), val.toLowerCase()); } } else { afterRead(entry.getValue()); } } } } }; }
From source file:co.cask.cdap.common.io.CaseInsensitiveEnumTypeAdapterFactory.java
License:Apache License
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { @SuppressWarnings("unchecked") Class<T> rawType = (Class<T>) type.getRawType(); if (!rawType.isEnum()) { return null; }/*from w ww.ja va 2 s . c om*/ final Map<String, T> lowercaseToConstant = new HashMap<>(); for (T constant : rawType.getEnumConstants()) { lowercaseToConstant.put(toLowercase(constant), constant); } return new TypeAdapter<T>() { public void write(JsonWriter out, T value) throws IOException { if (value == null) { out.nullValue(); } else { out.value(toLowercase(value)); } } public T read(JsonReader reader) throws IOException { if (reader.peek() == JsonToken.NULL) { reader.nextNull(); return null; } else { return lowercaseToConstant.get(toLowercase(reader.nextString())); } } }; }
From source file:co.forsaken.projectindigo.utils.mojangtokens.EnumTypeAdapterFactory.java
License:Open Source License
@SuppressWarnings("unchecked") @Override//from w ww.j a va2 s.co m public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { if (!type.getRawType().isEnum()) { return null; } final Map<String, T> map = new HashMap<String, T>(); for (T c : (T[]) type.getRawType().getEnumConstants()) { map.put(c.toString().toLowerCase(Locale.US), c); } return new TypeAdapter<T>() { @Override public T read(JsonReader reader) throws IOException { if (reader.peek() == JsonToken.NULL) { reader.nextNull(); return null; } String name = reader.nextString(); if (name == null) { return null; } return map.get(name.toLowerCase(Locale.US)); } @Override public void write(JsonWriter writer, T value) throws IOException { if (value == null) { writer.nullValue(); } else { writer.value(value.toString().toLowerCase(Locale.US)); } } }; }
From source file:com.atlauncher.workers.EnumTypeAdapterFactory.java
License:Creative Commons License
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { if (!type.getRawType().isEnum()) return null; final Map<String, T> map = new HashMap<String, T>(); for (T c : (T[]) type.getRawType().getEnumConstants()) { map.put(c.toString().toLowerCase(Locale.US), c); }//from ww w. ja va 2 s . c o m return new TypeAdapter<T>() { @Override public T read(JsonReader reader) throws IOException { if (reader.peek() == JsonToken.NULL) { reader.nextNull(); return null; } String name = reader.nextString(); if (name == null) return null; return map.get(name.toLowerCase(Locale.US)); } @Override public void write(JsonWriter writer, T value) throws IOException { if (value == null) { writer.nullValue(); } else { writer.value(value.toString().toLowerCase(Locale.US)); } } }; }
From source file:com.codefororlando.streettrees.api.deserializer.ResponseSanitizer.java
License:Open Source License
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { public void write(JsonWriter out, T value) throws IOException { delegate.write(out, value);// w ww . j a va 2 s . c om } public T read(JsonReader in) throws IOException { T parsedObject = delegate.read(in); // NOTE(jpr): Tree names come in with errant whitespace, and its easiest to fix it here // rather than fighting retrofit during deserialization if (parsedObject instanceof Tree) { Tree tree = (Tree) parsedObject; tree.setTreeName(tree.getTreeName().trim()); } return parsedObject; } }; }
From source file:com.continuuity.loom.codec.json.LowercaseEnumTypeAdapterFactory.java
License:Apache License
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { Class<T> rawType = (Class<T>) type.getRawType(); if (!rawType.isEnum()) { return null; }/*from w w w .jav a2 s .co m*/ final Map<String, T> lowercaseToConstant = Maps.newHashMap(); for (T constant : rawType.getEnumConstants()) { lowercaseToConstant.put(toLowercase(constant), constant); } return new TypeAdapter<T>() { public void write(JsonWriter out, T value) throws IOException { if (value == null) { out.nullValue(); } else { out.value(toLowercase(value)); } } public T read(JsonReader reader) throws IOException { if (reader.peek() == JsonToken.NULL) { reader.nextNull(); return null; } else { String next = reader.nextString(); return lowercaseToConstant.get(next); } } }; }