Example usage for com.fasterxml.jackson.databind KeyDeserializer deserializeKey

Introduction

In this page you can find the example usage for com.fasterxml.jackson.databind KeyDeserializer deserializeKey.

Prototype

public abstract Object deserializeKey(String paramString, DeserializationContext paramDeserializationContext);

Source Link

Usage

From source file:net.nullschool.grains.jackson.datatype.AbstractBasicConstMapDeserializer.java

@Override
public T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
    JsonToken token = jp.getCurrentToken();
    if (token == JsonToken.START_OBJECT) {
        token = jp.nextToken();/*  ww w. j  a  va2s  . c  o m*/
    } else if (token != JsonToken.FIELD_NAME) {
        throw ctxt.mappingException(mapType.getRawClass());
    }

    if (token == JsonToken.END_OBJECT) {
        return emptyResult();
    }

    KeyDeserializer kd = keyDeserializer;
    JsonDeserializer<?> vd = valueDeserializer;
    TypeDeserializer vtd = valueTypeDeserializer;

    List<Object> keys = null;
    List<Object> values = null;
    Object key;
    Object value;
    do {
        String name = jp.getCurrentName();
        key = kd == null ? name : kd.deserializeKey(name, ctxt);
        value = jp.nextToken() != JsonToken.VALUE_NULL
                ? vtd == null ? vd.deserialize(jp, ctxt) : vd.deserializeWithType(jp, ctxt, vtd)
                : null;

        token = jp.nextToken();
        if (keys == null) {
            if (token == JsonToken.END_OBJECT) {
                return resultOf(key, value);
            }
            keys = new ArrayList<>();
            values = new ArrayList<>();
        }
        keys.add(key);
        values.add(value);
    } while (token != JsonToken.END_OBJECT);

    return asResult(keys, values);
}

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From source file:com.kaaprotech.satu.jackson.SatuDeserializers.java

@Override
public JsonDeserializer<?> findMapDeserializer(final MapType type, final DeserializationConfig config,
        BeanDescription beanDesc, final KeyDeserializer keyDeserializer,
        final TypeDeserializer elementTypeDeserializer, final JsonDeserializer<?> elementDeserializer)
        throws JsonMappingException {

    if (ImmutableMap.class.isAssignableFrom(type.getRawClass())) {
        return new StdDeserializer<Object>(type) {
            private static final long serialVersionUID = 1L;

            @Override// ww w  . j  a va2 s.  c  o m
            public Object deserialize(JsonParser jp, DeserializationContext context) throws IOException {

                JsonToken t = jp.getCurrentToken();
                if (t == JsonToken.START_OBJECT) {
                    t = jp.nextToken();
                }
                if (t != JsonToken.FIELD_NAME && t != JsonToken.END_OBJECT) {
                    throw context.mappingException(type.getRawClass());
                }

                MutableMap<Object, Object> m = Maps.mutable.of();

                for (; jp.getCurrentToken() == JsonToken.FIELD_NAME; jp.nextToken()) {
                    // Pointing to field name
                    String fieldName = jp.getCurrentName();
                    Object key = (keyDeserializer == null) ? fieldName
                            : keyDeserializer.deserializeKey(fieldName, context);
                    t = jp.nextToken();

                    Object value;
                    if (t == JsonToken.VALUE_NULL) {
                        value = null;
                    } else if (elementDeserializer == null) {
                        value = jp.readValueAs(type.getContentType().getRawClass());
                    } else if (elementTypeDeserializer == null) {
                        value = elementDeserializer.deserialize(jp, context);
                    } else {
                        value = elementDeserializer.deserializeWithType(jp, context, elementTypeDeserializer);
                    }
                    m.put(key, value);
                }
                return m.toImmutable();
            }
        };
    }

    return super.findMapDeserializer(type, config, beanDesc, keyDeserializer, elementTypeDeserializer,
            elementDeserializer);
}

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