| package org.codehaus.jackson.map.jsontype.impl; |
| |
| import java.io.IOException; |
| |
| import org.codehaus.jackson.*; |
| import org.codehaus.jackson.annotate.JsonTypeInfo.As; |
| import org.codehaus.jackson.map.*; |
| import org.codehaus.jackson.map.jsontype.TypeIdResolver; |
| import org.codehaus.jackson.type.JavaType; |
| |
| /** |
| * Type deserializer used with {@link As#WRAPPER_OBJECT} |
| * inclusion mechanism. Simple since JSON structure used is always |
| * the same, regardless of structure used for actual value: wrapping |
| * is done using a single-element JSON Object where type id is the key, |
| * and actual object data as the value. |
| * |
| * @author tatus |
| */ |
| public class AsWrapperTypeDeserializer extends TypeDeserializerBase |
| { |
| @Deprecated // since 1.9 |
| public AsWrapperTypeDeserializer(JavaType bt, TypeIdResolver idRes, BeanProperty property) { |
| this(bt, idRes, property, null); |
| } |
| |
| public AsWrapperTypeDeserializer(JavaType bt, TypeIdResolver idRes, BeanProperty property, |
| Class<?> defaultImpl) |
| { |
| super(bt, idRes, property, null); |
| } |
| |
| @Override |
| public As getTypeInclusion() { |
| return As.WRAPPER_OBJECT; |
| } |
| |
| /** |
| * Deserializing type id enclosed using WRAPPER_OBJECT style is straightforward |
| */ |
| @Override |
| public Object deserializeTypedFromObject(JsonParser jp, DeserializationContext ctxt) |
| throws IOException, JsonProcessingException |
| { |
| return _deserialize(jp, ctxt); |
| } |
| |
| @Override |
| public Object deserializeTypedFromArray(JsonParser jp, DeserializationContext ctxt) |
| throws IOException, JsonProcessingException |
| { |
| return _deserialize(jp, ctxt); |
| } |
| |
| @Override |
| public Object deserializeTypedFromScalar(JsonParser jp, DeserializationContext ctxt) |
| throws IOException, JsonProcessingException |
| { |
| return _deserialize(jp, ctxt); |
| } |
| |
| @Override |
| public Object deserializeTypedFromAny(JsonParser jp, DeserializationContext ctxt) |
| throws IOException, JsonProcessingException |
| { |
| return _deserialize(jp, ctxt); |
| } |
| |
| /* |
| /*************************************************************** |
| /* Internal methods |
| /*************************************************************** |
| */ |
| |
| /** |
| * Method that handles type information wrapper, locates actual |
| * subtype deserializer to use, and calls it to do actual |
| * deserialization. |
| */ |
| private final Object _deserialize(JsonParser jp, DeserializationContext ctxt) |
| throws IOException, JsonProcessingException |
| { |
| // first, sanity checks |
| if (jp.getCurrentToken() != JsonToken.START_OBJECT) { |
| throw ctxt.wrongTokenException(jp, JsonToken.START_OBJECT, |
| "need JSON Object to contain As.WRAPPER_OBJECT type information for class "+baseTypeName()); |
| } |
| // should always get field name, but just in case... |
| if (jp.nextToken() != JsonToken.FIELD_NAME) { |
| throw ctxt.wrongTokenException(jp, JsonToken.FIELD_NAME, |
| "need JSON String that contains type id (for subtype of "+baseTypeName()+")"); |
| } |
| JsonDeserializer<Object> deser = _findDeserializer(ctxt, jp.getText()); |
| jp.nextToken(); |
| Object value = deser.deserialize(jp, ctxt); |
| // And then need the closing END_OBJECT |
| if (jp.nextToken() != JsonToken.END_OBJECT) { |
| throw ctxt.wrongTokenException(jp, JsonToken.END_OBJECT, |
| "expected closing END_OBJECT after type information and deserialized value"); |
| } |
| return value; |
| } |
| } |