Example usage for com.fasterxml.jackson.core JsonParser getClass

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonParser getClass.

Prototype

@HotSpotIntrinsicCandidate
public final native Class<?> getClass();

Source Link

Document

Returns the runtime class of this Object .

Usage

From source file:org.mongojack.internal.DBRefDeserializer.java

@Override
public DBRef deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException {
    // First of all, make sure that we can get a copy of the DBCollection
    if (jp instanceof JacksonDBCollectionProvider) {
        K id = null;//from  w ww  .j a  va 2  s  .  c  o  m
        String collectionName = null;
        JsonToken token = jp.getCurrentToken();
        if (token == JsonToken.VALUE_NULL) {
            return null;
        }
        if (token == JsonToken.VALUE_EMBEDDED_OBJECT) {
            // Someones already kindly decoded it for us
            Object object = jp.getEmbeddedObject();
            if (object instanceof com.mongodb.DBRef) {
                if (keyDeserializer != null) {
                    id = keyDeserializer.deserialize(jp, ctxt);
                } else {
                    id = (K) ((com.mongodb.DBRef) object).getId();
                }
                collectionName = ((com.mongodb.DBRef) object).getRef();
            } else {
                throw ctxt.instantiationException(DBRef.class,
                        "Don't know what to do with embedded object: " + object);
            }
        } else if (token == JsonToken.START_OBJECT) {
            token = jp.nextValue();
            while (token != JsonToken.END_OBJECT) {
                if (jp.getCurrentName().equals("$id")) {
                    if (keyDeserializer != null) {
                        id = keyDeserializer.deserialize(jp, ctxt);
                    } else {
                        id = (K) jp.getEmbeddedObject();
                    }
                } else if (jp.getCurrentName().equals("$ref")) {
                    collectionName = jp.getText();
                } else {
                    // Ignore the rest
                }
                token = jp.nextValue();
            }
        }
        if (id == null) {
            return null;
        }
        if (collectionName == null) {
            throw ctxt.instantiationException(DBRef.class, "DBRef contains no collection name");
        }

        JacksonDBCollection coll = ((JacksonDBCollectionProvider) jp).getDBCollection();
        JacksonDBCollection<T, K> refColl = coll.getReferenceCollection(collectionName, type, keyType);
        return new FetchableDBRef<T, K>(id, refColl);
    } else {
        throw ctxt.instantiationException(DBRef.class,
                "DBRef can only be deserialised by this deserializer if parser implements "
                        + JacksonDBCollectionProvider.class.getName() + " parser is actually "
                        + jp.getClass().getName());
    }
}

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