protected Object _unwrapAndDeserialize( JsonParser jp, DeserializationContext ctxt, JavaType rootType, JsonDeserializer<Object> deser) throws IOException, JsonParseException, JsonMappingException { SerializedString rootName = _provider.findExpectedRootName(ctxt.getConfig(), rootType); if (jp.getCurrentToken() != JsonToken.START_OBJECT) { throw JsonMappingException.from( jp, "Current token not START_OBJECT (needed to unwrap root name '" + rootName + "'), but " + jp.getCurrentToken()); } if (jp.nextToken() != JsonToken.FIELD_NAME) { throw JsonMappingException.from( jp, "Current token not FIELD_NAME (to contain expected root name '" + rootName + "'), but " + jp.getCurrentToken()); } String actualName = jp.getCurrentName(); if (!rootName.getValue().equals(actualName)) { throw JsonMappingException.from( jp, "Root name '" + actualName + "' does not match expected ('" + rootName + "') for type " + rootType); } // ok, then move to value itself.... jp.nextToken(); Object result; if (_valueToUpdate == null) { result = deser.deserialize(jp, ctxt); } else { deser.deserialize(jp, ctxt, _valueToUpdate); result = _valueToUpdate; } // and last, verify that we now get matching END_OBJECT if (jp.nextToken() != JsonToken.END_OBJECT) { throw JsonMappingException.from( jp, "Current token not END_OBJECT (to match wrapper object with root name '" + rootName + "'), but " + jp.getCurrentToken()); } return result; }
/** Method called to locate deserializer for the passed root-level value. */ protected JsonDeserializer<Object> _findRootDeserializer( DeserializationConfig cfg, JavaType valueType) throws JsonMappingException { // First: have we already seen it? JsonDeserializer<Object> deser = _rootDeserializers.get(valueType); if (deser != null) { return deser; } // Nope: need to ask provider to resolve it deser = _provider.findTypedValueDeserializer(cfg, valueType, null); if (deser == null) { // can this happen? throw new JsonMappingException("Can not find a deserializer for type " + valueType); } _rootDeserializers.put(valueType, deser); return deser; }