List of usage examples for com.google.gson TypeAdapter TypeAdapter
TypeAdapter
From source file:com.ibm.og.json.type.ChoiceConfigTypeAdapterFactory.java
License:Open Source License
@Override @SuppressWarnings("unchecked") public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { final Class<T> rawType = (Class<T>) type.getRawType(); if (!ChoiceConfig.class.equals(rawType)) { return null; }/*from ww w. j ava2s. c o m*/ final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { @Override public void write(final JsonWriter out, final T value) throws IOException { delegate.write(out, value); } @Override @SuppressWarnings("rawtypes") public T read(final JsonReader in) throws IOException { final Class<?> genericType = (Class<?>) ((ParameterizedType) type.getType()) .getActualTypeArguments()[0]; final TypeAdapter<JsonElement> jsonElementAdapter = gson.getAdapter(JsonElement.class); // the tree api is used here rather than the stream api so that the full object can be // inspected and we can differentiate between a ChoiceConfig<T> object or the underlying T // object itself. With the stream api there would be no way to rewind the stream once this // determination is made // // this logic allows the user to configure a choice of T in both the standard form, or // compactly if the default choice weight is sufficient e.g. // // standard form // {"choice": {fields for T object}, "weight": 1.0} <- weight is optional here // // compact form where default weight is acceptable // {fields for T object} final JsonElement element = jsonElementAdapter.read(in); if (element.isJsonObject()) { final JsonObject object = element.getAsJsonObject(); if (object.entrySet().size() <= 2 && object.has("choice")) { return delegate.fromJsonTree(element); } } return (T) new ChoiceConfig(gson.getAdapter(TypeToken.get(genericType)).fromJsonTree(element)); } }.nullSafe(); }
From source file:com.ibm.og.json.type.ContainerConfigTypeAdapterFactory.java
License:Open Source License
@Override @SuppressWarnings("unchecked") public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { final Class<T> rawType = (Class<T>) type.getRawType(); if (!ContainerConfig.class.equals(rawType)) { return null; }//from w w w . jav a2 s . c o m final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { @Override public void write(final JsonWriter out, final T value) throws IOException { delegate.write(out, value); } @Override public T read(final JsonReader in) throws IOException { if (JsonToken.STRING == in.peek()) { return (T) new ContainerConfig(in.nextString()); } return delegate.read(in); } }.nullSafe(); }
From source file:com.ibm.og.json.type.FilesizeConfigTypeAdapterFactory.java
License:Open Source License
@Override @SuppressWarnings("unchecked") public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { final Class<T> rawType = (Class<T>) type.getRawType(); if (!FilesizeConfig.class.equals(rawType)) { return null; }/*from w w w .j a va 2 s . c o m*/ final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { @Override public void write(final JsonWriter out, final T value) throws IOException { delegate.write(out, value); } @Override public T read(final JsonReader in) throws IOException { if (JsonToken.NUMBER == in.peek()) { return (T) new FilesizeConfig(in.nextDouble()); } return delegate.read(in); } }.nullSafe(); }
From source file:com.ibm.og.json.type.OperationConfigTypeAdapterFactory.java
License:Open Source License
@Override @SuppressWarnings("unchecked") public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { final Class<T> rawType = (Class<T>) type.getRawType(); if (!OperationConfig.class.equals(rawType)) { return null; }/* w ww .j a va2 s.com*/ final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { @Override public void write(final JsonWriter out, final T value) throws IOException { delegate.write(out, value); } @Override public T read(final JsonReader in) throws IOException { if (JsonToken.NUMBER == in.peek()) { return (T) new OperationConfig(in.nextDouble()); } return delegate.read(in); } }.nullSafe(); }
From source file:com.ibm.og.json.type.SelectionConfigTypeAdapterFactory.java
License:Open Source License
@Override @SuppressWarnings("unchecked") public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { final Class<T> rawType = (Class<T>) type.getRawType(); if (!SelectionConfig.class.equals(rawType)) { return null; }/*from w w w. j a v a 2 s . c o m*/ final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); return new TypeAdapter<T>() { @Override public void write(final JsonWriter out, final T value) throws IOException { delegate.write(out, value); } @Override public T read(final JsonReader in) throws IOException { final Class<?> genericType = (Class<?>) ((ParameterizedType) type.getType()) .getActualTypeArguments()[0]; final JsonElement element = gson.getAdapter(JsonElement.class).read(in); if (element.isJsonObject()) { final JsonObject object = element.getAsJsonObject(); if (object.entrySet().size() <= 2 && object.has("choices")) { return delegate.fromJsonTree(object); } else { return (T) choice(genericType, object); } } else if (element.isJsonArray()) { return (T) choiceList(genericType, element.getAsJsonArray()); } return (T) choice(genericType, element); } private <S> SelectionConfig<S> choice(final Class<S> clazz, final JsonElement element) throws IOException { final SelectionConfig<S> config = new SelectionConfig<S>(); config.choices.add(gson.getAdapter(choiceToken(clazz)).fromJsonTree(element)); return config; } private <S> SelectionConfig<S> choiceList(final Class<S> clazz, final JsonArray array) throws IOException { final SelectionConfig<S> config = new SelectionConfig<S>(); config.choices = gson.getAdapter(choiceListToken(clazz)).fromJsonTree(array); return config; } // must use guava's TypeToken implementation to create a TypeToken instance with a dynamic // type; then convert back to gson's TypeToken implementation for use in calling code. See: // https://groups.google.com/forum/#!topic/guava-discuss/HdBuiO44uaw private <S> TypeToken<ChoiceConfig<S>> choiceToken(final Class<S> clazz) { @SuppressWarnings("serial") final com.google.common.reflect.TypeToken<ChoiceConfig<S>> choiceToken = new com.google.common.reflect.TypeToken<ChoiceConfig<S>>() { }.where(new TypeParameter<S>() { }, com.google.common.reflect.TypeToken.of(clazz)); return (TypeToken<ChoiceConfig<S>>) TypeToken.get(choiceToken.getType()); } private <S> TypeToken<List<ChoiceConfig<S>>> choiceListToken(final Class<S> clazz) { @SuppressWarnings("serial") final com.google.common.reflect.TypeToken<List<ChoiceConfig<S>>> choiceToken = new com.google.common.reflect.TypeToken<List<ChoiceConfig<S>>>() { }.where(new TypeParameter<S>() { }, com.google.common.reflect.TypeToken.of(clazz)); return (TypeToken<List<ChoiceConfig<S>>>) TypeToken.get(choiceToken.getType()); } }.nullSafe(); }
From source file:com.ibm.og.util.json.type.CaseInsensitiveEnumTypeAdapterFactory.java
License:Open Source License
@Override public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> type) { @SuppressWarnings("unchecked") final Class<T> rawType = (Class<T>) type.getRawType(); if (!rawType.isEnum()) { return null; }/* w ww.j av a 2s. co m*/ return new TypeAdapter<T>() { @Override public void write(final JsonWriter out, final T value) throws IOException { out.value(value.toString().toLowerCase(Locale.US)); } @Override @SuppressWarnings("unchecked") public T read(final JsonReader in) throws IOException { final String s = in.nextString().toUpperCase(Locale.US); for (final Object enumEntry : rawType.getEnumConstants()) { if (enumEntry.toString().equals(s)) { return (T) enumEntry; } } throw new JsonSyntaxException(String.format("Could not parse into enum [%s]", s)); } }.nullSafe(); }
From source file:com.kotcrab.vis.editor.serializer.json.RuntimeTypeAdapterFactory.java
License:Apache License
public <R> TypeAdapter<R> create(Gson gson, TypeToken<R> type) { if (baseType.isAssignableFrom(type.getRawType()) == false) { return null; }//from ww w . j a va 2 s . c om 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:com.learn.mobile.library.dmobi.helper.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 . j a v a 2s .c o 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); // Do not remove typeFieldName 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 { 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); } }.nullSafe(); }
From source file:com.metinkale.prayerapp.vakit.times.gson.RuntimeTypeAdapterFactory.java
License:Apache License
@Override public <R> TypeAdapter<R> create(@NonNull Gson gson, @NonNull TypeToken<R> type) { if (type.getRawType() != baseType) { return null; }/*from w w w . j a v a 2 s . co m*/ final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<>(); final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<>(); 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, @NonNull 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); } }.nullSafe(); }
From source file:com.michaelfotiadis.crossyscore.core.data.parsers.gson.RuntimeTypeAdapterFactory.java
License:Apache License
public <R> TypeAdapter<R> create(final Gson gson, final TypeToken<R> type) { if (!type.getRawType().equals(baseType)) { return null; }//from w w w . j a v a 2 s. co m final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<>(); final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<>(); for (final Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) { final 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 void write(final JsonWriter out, final R value) throws IOException { if (value != null) { final Class<?> srcType = value.getClass(); final String label = subtypeToLabel.get(srcType); @SuppressWarnings("unchecked") final // 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?"); } final 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); } final JsonObject clone = new JsonObject(); clone.add(typeFieldName, new JsonPrimitive(label)); for (final Map.Entry<String, JsonElement> e : jsonObject.entrySet()) { clone.add(e.getKey(), e.getValue()); } Streams.write(clone, out); } else { out.nullValue(); } } @Override public R read(final JsonReader in) throws IOException { final JsonElement jsonElement = Streams.parse(in); // fix for null Json Elements if (jsonElement.isJsonNull()) { return null; } final JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName); final String label = getBaseTypeLabel(labelJsonElement); @SuppressWarnings("unchecked") // registration requires that subtype extends T final 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); } private String getBaseTypeLabel(final JsonElement labelJsonElement) { final String label; if (labelJsonElement == null) { if (defaultSubTypeLabel == null) { throw new JsonParseException("cannot deserialize " + baseType + " because it does not define a field named " + typeFieldName); } else { label = defaultSubTypeLabel; if (!labelToDelegate.containsKey(label)) { throw new IllegalStateException( "WTF: Was looking for " + label + " in " + labelToDelegate.keySet()); } } } else { label = labelJsonElement.getAsString(); } return label; } }; }