Java Code Examples for com.fasterxml.jackson.databind.JsonDeserializer#deserializeWithType()

The following examples show how to use com.fasterxml.jackson.databind.JsonDeserializer#deserializeWithType() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: GuavaMultisetDeserializer.java    From jackson-datatypes-collections with Apache License 2.0 6 votes vote down vote up 
@Override
protected T _deserializeContents(JsonParser p, DeserializationContext ctxt) throws IOException,
        JsonProcessingException {
    JsonDeserializer<?> valueDes = _valueDeserializer;
    JsonToken t;
    final TypeDeserializer typeDeser = _valueTypeDeserializer;
    T set = createMultiset();

    while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
        Object value;

        if (t == JsonToken.VALUE_NULL) {
            if (_skipNullValues) {
                continue;
            }
            value = _nullProvider.getNullValue(ctxt);
        } else if (typeDeser == null) {
            value = valueDes.deserialize(p, ctxt);
        } else {
            value = valueDes.deserializeWithType(p, ctxt, typeDeser);
        }
        set.add(value);
    }
    return set;
}
Example 2
Source File: CustomCollectionDeserializer.java    From caravan with Apache License 2.0 5 votes vote down vote up 
/**
 * Helper method called when current token is no START_ARRAY. Will either
 * throw an exception, or try to handle value as if member of implicit
 * array, depending on configuration.
 */
@SuppressWarnings("unchecked")
protected final Collection<Object> handleNonArray(JsonParser p, DeserializationContext ctxt,
    Collection<Object> result)
    throws IOException {
  // Implicit arrays from single values?
  boolean canWrap = (_unwrapSingle == Boolean.TRUE) ||
      ((_unwrapSingle == null) &&
          ctxt.isEnabled(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY));
  if (!canWrap) {
    return (Collection<Object>) ctxt.handleUnexpectedToken(_containerType.getRawClass(), p);
  }
  JsonDeserializer<Object> valueDes = _valueDeserializer;
  final TypeDeserializer typeDeser = _valueTypeDeserializer;
  JsonToken t = p.getCurrentToken();

  Object value;

  try {
    if (t == JsonToken.VALUE_NULL) {
      // 03-Feb-2017, tatu: Hmmh. I wonder... let's try skipping here, too
      if (_skipNullValues) {
        return result;
      }
      value = _nullProvider.getNullValue(ctxt);
    } else if (typeDeser == null) {
      value = valueDes.deserialize(p, ctxt);
    } else {
      value = valueDes.deserializeWithType(p, ctxt, typeDeser);
    }
  } catch (Exception e) {
    // note: pass Object.class, not Object[].class, as we need element type for error info
    throw JsonMappingException.wrapWithPath(e, Object.class, result.size());
  }
  result.add(value);
  return result;
}
Example 3
Source File: GuavaImmutableCollectionDeserializer.java    From jackson-datatypes-collections with Apache License 2.0 5 votes vote down vote up 
@Override
protected T _deserializeContents(JsonParser p, DeserializationContext ctxt)
        throws IOException, JsonProcessingException
{
    JsonDeserializer<?> valueDes = _valueDeserializer;
    JsonToken t;
    final TypeDeserializer typeDeser = _valueTypeDeserializer;
    // No way to pass actual type parameter; but does not matter, just
    // compiler-time fluff:
    ImmutableCollection.Builder<Object> builder = createBuilder();

    while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
        Object value;

        if (t == JsonToken.VALUE_NULL) {
            if (_skipNullValues) {
                continue;
            }
            value = _resolveNullToValue(ctxt);
        } else if (typeDeser == null) {
            value = valueDes.deserialize(p, ctxt);
        } else {
            value = valueDes.deserializeWithType(p, ctxt, typeDeser);
        }
        builder.add(value);
    }
    // No class outside of the package will be able to subclass us,
    // and we provide the proper builder for the subclasses we implement.
    @SuppressWarnings("unchecked")
    T collection = (T) builder.build();
    return collection;
}
Example 4
Source File: CustomCollectionDeserializer.java    From caravan with Apache License 2.0 4 votes vote down vote up 
@SuppressWarnings("unchecked")
@Override
public Object deserialize(JsonParser p, DeserializationContext ctxt,
    Object result)
    throws IOException {
  // Ok: must point to START_ARRAY (or equivalent)
  if (!p.isExpectedStartArrayToken()) {
    return handleNonArray(p, ctxt, (Collection<Object>) result);
  }
  // [databind#631]: Assign current value, to be accessible by custom serializers
  p.setCurrentValue(result);

  JsonDeserializer<Object> valueDes = _valueDeserializer;
  final TypeDeserializer typeDeser = _valueTypeDeserializer;
  CollectionReferringAccumulator referringAccumulator =
      (valueDes.getObjectIdReader() == null) ? null :
          new CollectionReferringAccumulator(_containerType.getContentType().getRawClass(), (Collection<Object>) result);

  JsonToken t;
  while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
    try {
      Object value;
      if (t == JsonToken.VALUE_NULL) {
        if (_skipNullValues) {
          continue;
        }
        value = _nullProvider.getNullValue(ctxt);
      } else if (typeDeser == null) {
        value = valueDes.deserialize(p, ctxt);
      } else {
        value = valueDes.deserializeWithType(p, ctxt, typeDeser);
      }
      if (referringAccumulator != null) {
        referringAccumulator.add(value);
      } else {
        ((Collection<Object>) result).add(value);
      }
    } catch (UnresolvedForwardReference reference) {
      if (referringAccumulator == null) {
        throw JsonMappingException
            .from(p, "Unresolved forward reference but no identity info", reference);
      }
      Referring ref = referringAccumulator.handleUnresolvedReference(reference);
      reference.getRoid().appendReferring(ref);
    } catch (Exception e) {
      boolean wrap = (ctxt == null) || ctxt.isEnabled(DeserializationFeature.WRAP_EXCEPTIONS);
      if (!wrap) {
        ClassUtil.throwIfRTE(e);
      }
      throw JsonMappingException.wrapWithPath(e, result, ((Collection<Object>) result).size());
    }
  }
  return result;
}
Example 5
Source File: GuavaImmutableMapDeserializer.java    From jackson-datatypes-collections with Apache License 2.0 4 votes vote down vote up 
@Override
protected T _deserializeEntries(JsonParser p, DeserializationContext ctxt)
    throws IOException, JsonProcessingException
{
    final KeyDeserializer keyDes = _keyDeserializer;
    final JsonDeserializer<?> valueDes = _valueDeserializer;
    final TypeDeserializer typeDeser = _valueTypeDeserializer;

    ImmutableMap.Builder<Object, Object> builder = createBuilder();
    for (; p.currentToken() == JsonToken.FIELD_NAME; p.nextToken()) {
        // Must point to field name now
        String fieldName = p.currentName();
        Object key = (keyDes == null) ? fieldName : keyDes.deserializeKey(fieldName, ctxt);
        // And then the value...
        JsonToken t = p.nextToken();
        // 28-Nov-2010, tatu: Should probably support "ignorable properties" in future...
        Object value;            
        if (t == JsonToken.VALUE_NULL) {
            if (!_skipNullValues) {
                value = _nullProvider.getNullValue(ctxt);
                // 14-Sep-2015, tatu: As per [datatype-guava#52], avoid exception due to null
                // TODO: allow reporting problem via a feature, in future?
                if (value != null) {
                    builder.put(key, value);
                }
            }
            continue;
        }
        if (typeDeser == null) {
            value = valueDes.deserialize(p, ctxt);
        } else {
            value = valueDes.deserializeWithType(p, ctxt, typeDeser);
        }
        builder.put(key, value);
    }
    // No class outside of the package will be able to subclass us,
    // and we provide the proper builder for the subclasses we implement.
    @SuppressWarnings("unchecked")
    T map = (T) builder.build();
    return map;
}
Example 6
Source File: ListDeserializer.java    From allure2 with Apache License 2.0 4 votes vote down vote up 
@Override
public Collection<Object> deserialize(JsonParser p, DeserializationContext ctxt,
                                      Collection<Object> result)
        throws IOException {
    // Ok: must point to START_ARRAY (or equivalent)
    if (!p.isExpectedStartArrayToken()) {
        return result;
    }
    // [databind#631]: Assign current value, to be accessible by custom serializers
    p.setCurrentValue(result);

    JsonDeserializer<Object> valueDes = _valueDeserializer;
    final TypeDeserializer typeDeser = _valueTypeDeserializer;
    CollectionReferringAccumulator referringAccumulator =
            (valueDes.getObjectIdReader() == null) ? null :
                    new CollectionReferringAccumulator(_containerType.getContentType().getRawClass(), result);

    JsonToken t;
    while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
        try {
            Object value;
            if (t == JsonToken.VALUE_NULL) {
                if (_skipNullValues) {
                    continue;
                }
                value = _nullProvider.getNullValue(ctxt);
            } else if (typeDeser == null) {
                value = valueDes.deserialize(p, ctxt);
            } else {
                value = valueDes.deserializeWithType(p, ctxt, typeDeser);
            }
            if (referringAccumulator != null) {
                referringAccumulator.add(value);
            } else {
                result.add(value);
            }
        } catch (UnresolvedForwardReference reference) {
            if (referringAccumulator == null) {
                throw JsonMappingException
                        .from(p, "Unresolved forward reference but no identity info", reference);
            }
            ReadableObjectId.Referring ref = referringAccumulator.handleUnresolvedReference(reference);
            reference.getRoid().appendReferring(ref);
        } catch (Exception e) {
            boolean wrap = (ctxt == null) || ctxt.isEnabled(DeserializationFeature.WRAP_EXCEPTIONS);
            if (!wrap) {
                ClassUtil.throwIfRTE(e);
            }
            throw JsonMappingException.wrapWithPath(e, result, result.size());
        }
    }
    return result;
}