Example usage for com.google.gson TypeAdapter read

Introduction

In this page you can find the example usage for com.google.gson TypeAdapter read.

Prototype

public abstract T read(JsonReader in) throws IOException;

Source Link

Document

Reads one JSON value (an array, object, string, number, boolean or null) and converts it to a Java object.

Usage

From source file:org.immutables.gson.adapter.ExpectedSubtypesAdapter.java

License:Apache License

@SuppressWarnings("unchecked")
@Override/*from  w w w. j a  v a2s.  co m*/
public T read(JsonReader in) throws IOException {
    List<Exception> exceptions = new ArrayList<>(subtypes.length);
    ReaderSupplier readerSupplier = readForSupplier(in);
    for (TypeAdapter<?> typeAdapter : adapters) {
        try {
            return (T) typeAdapter.read(readerSupplier.create());
        } catch (Exception ex) {
            exceptions.add(ex);
        }
    }
    JsonParseException failure = new JsonParseException(
            String.format("Cannot parse %s with following subtypes: %s", type, Arrays.toString(subtypes)));
    for (Exception exception : exceptions) {
        failure.addSuppressed(exception);
    }
    throw failure;
}

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From source file:org.immutables.mongo.repository.internal.BsonEncoding.java

License:Apache License

public static <T> T unmarshalDbObject(DBObject dbObject, TypeAdapter<T> adaper) throws IOException {
    BasicOutputBuffer buffer = new BasicOutputBuffer();
    encoder().writeObject(buffer, dbObject);
    BsonParser parser = BSON_FACTORY.createParser(buffer.toByteArray());
    BsonReader reader = new BsonReader(parser);
    T instance = adaper.read(reader);
    reader.close();//from   w  ww .jav a2 s.co m
    return instance;
}

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From source file:org.jclouds.json.internal.IgnoreNullFluentIterableTypeAdapterFactory.java

License:Apache License

protected <E> TypeAdapter<FluentIterable<E>> newFluentIterableAdapter(final TypeAdapter<E> elementAdapter) {
    return new TypeAdapter<FluentIterable<E>>() {
        public void write(JsonWriter out, FluentIterable<E> value) throws IOException {
            out.beginArray();/*from w ww  .  ja v  a 2  s .  co  m*/
            for (E element : value) {
                elementAdapter.write(out, element);
            }
            out.endArray();
        }

        public FluentIterable<E> read(JsonReader in) throws IOException {
            in.beginArray();
            Builder<E> builder = ImmutableList.<E>builder();
            while (in.hasNext()) {
                E element = elementAdapter.read(in);
                if (element != null)
                    builder.add(element);
            }
            in.endArray();
            return FluentIterable.from(builder.build());
        }
    }.nullSafe();
}

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From source file:org.jclouds.json.internal.IgnoreNullIterableTypeAdapterFactory.java

License:Apache License

protected <E> TypeAdapter<Iterable<E>> newIterableAdapter(final TypeAdapter<E> elementAdapter) {
    return new TypeAdapter<Iterable<E>>() {
        public void write(JsonWriter out, Iterable<E> value) throws IOException {
            out.beginArray();/*from  www . j  ava  2s  . c om*/
            for (E element : value) {
                elementAdapter.write(out, element);
            }
            out.endArray();
        }

        public Iterable<E> read(JsonReader in) throws IOException {
            in.beginArray();
            Builder<E> builder = ImmutableList.<E>builder();
            while (in.hasNext()) {
                E element = elementAdapter.read(in);
                if (element != null)
                    builder.add(element);
            }
            in.endArray();
            return builder.build();
        }
    }.nullSafe();
}

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From source file:org.jclouds.json.internal.IgnoreNullMapTypeAdapterFactory.java

License:Apache License

private <K, V> TypeAdapter<Map<K, V>> newMapAdapter(final TypeAdapter<K> keyAdapter,
        final TypeAdapter<V> valueAdapter) {
    return new TypeAdapter<Map<K, V>>() {
        public void write(JsonWriter out, Map<K, V> value) throws IOException {
            out.beginObject();// w ww  .  j  a v  a  2s .  c  om
            for (Map.Entry<K, V> element : value.entrySet()) {
                out.name(String.valueOf(element.getKey()));
                valueAdapter.write(out, element.getValue());
            }
            out.endObject();
        }

        public Map<K, V> read(JsonReader in) throws IOException {
            Map<K, V> result = Maps.newLinkedHashMap();
            in.beginObject();
            while (in.hasNext()) {
                JsonReaderInternalAccess.INSTANCE.promoteNameToValue(in);
                K name = keyAdapter.read(in);
                V value = valueAdapter.read(in);
                if (value != null)
                    result.put(name, value);
            }
            in.endObject();
            return result;
        }
    }.nullSafe();
}

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From source file:org.jclouds.json.internal.IgnoreNullMultimapTypeAdapterFactory.java

License:Apache License

private <K, V> TypeAdapter<Multimap<K, V>> newMapAdapter(final TypeAdapter<K> keyAdapter,
        final TypeAdapter<V> valueAdapter) {
    return new TypeAdapter<Multimap<K, V>>() {
        public void write(JsonWriter out, Multimap<K, V> map) throws IOException {
            out.beginObject();//from w w  w  .j  a v  a2s  . c o m
            for (K key : map.keySet()) {
                out.name(String.valueOf(key));
                out.beginArray();
                for (V value : map.get(key)) {
                    valueAdapter.write(out, value);
                }
                out.endArray();
            }
            out.endObject();
        }

        public Multimap<K, V> read(JsonReader in) throws IOException {
            ImmutableMultimap.Builder<K, V> result = ImmutableListMultimap.builder();
            in.beginObject();
            while (in.hasNext()) {
                JsonReaderInternalAccess.INSTANCE.promoteNameToValue(in);
                K name = keyAdapter.read(in);
                in.beginArray();
                while (in.hasNext()) {
                    V value = valueAdapter.read(in);
                    if (value != null)
                        result.put(name, value);
                }
                in.endArray();
            }
            in.endObject();
            return result.build();
        }
    }.nullSafe();
}

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From source file:org.jclouds.json.internal.IgnoreNullSetTypeAdapterFactory.java

License:Apache License

private <E> TypeAdapter<Set<E>> newSetAdapter(final TypeAdapter<E> elementAdapter) {
    return new TypeAdapter<Set<E>>() {
        public void write(JsonWriter out, Set<E> value) throws IOException {
            out.beginArray();// w  w  w.  j a va 2s  . c o m
            for (E element : value) {
                elementAdapter.write(out, element);
            }
            out.endArray();
        }

        public Set<E> read(JsonReader in) throws IOException {
            Set<E> result = Sets.newLinkedHashSet();
            in.beginArray();
            while (in.hasNext()) {
                E element = elementAdapter.read(in);
                if (element != null)
                    result.add(element);
            }
            in.endArray();
            return result;
        }
    }.nullSafe();
}

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From source file:org.jclouds.json.internal.OptionalTypeAdapterFactory.java

License:Apache License

protected <E> TypeAdapter<Optional<E>> newOptionalAdapter(final TypeAdapter<E> elementAdapter) {
    return new TypeAdapter<Optional<E>>() {
        public void write(JsonWriter out, Optional<E> value) throws IOException {
            if (!value.isPresent()) {
                out.nullValue();/*from w  w  w  .j a v a  2  s.  c o  m*/
                return;
            }
            elementAdapter.write(out, value.get());
        }

        public Optional<E> read(JsonReader in) throws IOException {
            Optional<E> result = Optional.absent();
            if (in.peek() == JsonToken.NULL) {
                in.nextNull();
            } else {
                E element = elementAdapter.read(in);
                if (element != null) {
                    result = Optional.of(element);
                }
            }
            return result;
        }
    };
}

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From source file:org.lanternpowered.server.script.json.CatalogTypeTypeAdapterFactory.java

License:MIT License

@Nullable
@Override// www  . j  av  a 2  s  .com
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    final Class<? super T> raw = type.getRawType();
    if (!CatalogType.class.isAssignableFrom(raw)) {
        return null;
    }
    final TypeAdapter<JsonElement> jsonElementTypeAdapter = gson.getAdapter(JsonElement.class);
    return new TypeAdapter<T>() {
        @Override
        public void write(JsonWriter out, T value) throws IOException {
            jsonElementTypeAdapter.write(out, new JsonPrimitive(((CatalogType) value).getId()));
        }

        @Override
        public T read(JsonReader in) throws IOException {
            final String id = jsonElementTypeAdapter.read(in).getAsString();
            //noinspection unchecked
            return (T) Sponge.getRegistry().getType((Class<? extends CatalogType>) raw, id)
                    .orElseThrow(() -> new IllegalArgumentException(
                            "There does not exist a " + raw.getName() + " with id: " + id));
        }
    };
}

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From source file:org.lanternpowered.server.script.json.ObjectTypeAdapterFactory.java

License:MIT License

@Nullable
@Override/*w  w  w .  j  a  va  2s. com*/
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    if (!type.isAssignableFrom(this.typeToken)) {
        return null;
    }
    final TypeAdapter<JsonElement> jsonElementTypeAdapter = gson.getAdapter(JsonElement.class);
    final TypeToken theTypeToken = type;
    return new TypeAdapter<T>() {

        @SuppressWarnings("unchecked")
        @Override
        public void write(JsonWriter out, T value) throws IOException {
            final JsonElement element = serialize((TypeToken<V>) theTypeToken, (V) value, gson);
            jsonElementTypeAdapter.write(out, element);
        }

        @SuppressWarnings("unchecked")
        @Override
        public T read(JsonReader in) throws IOException {
            final JsonElement element = jsonElementTypeAdapter.read(in);
            return (T) deserialize(theTypeToken, element, gson);
        }
    };
}

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