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Initial fix for issue FasterXML#351, handle simple case.
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Pascal Gélinas
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Nov 26, 2013
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116 changes: 116 additions & 0 deletions
116
src/main/java/com/fasterxml/jackson/databind/deser/impl/ObjectIdReference.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package com.fasterxml.jackson.databind.deser.impl; | ||
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| import java.io.IOException; | ||
| import java.lang.annotation.Annotation; | ||
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| import com.fasterxml.jackson.core.JsonParser; | ||
| import com.fasterxml.jackson.core.JsonProcessingException; | ||
| import com.fasterxml.jackson.core.JsonToken; | ||
| import com.fasterxml.jackson.databind.DeserializationContext; | ||
| import com.fasterxml.jackson.databind.JsonDeserializer; | ||
| import com.fasterxml.jackson.databind.PropertyName; | ||
| import com.fasterxml.jackson.databind.deser.SettableBeanProperty; | ||
| import com.fasterxml.jackson.databind.introspect.AnnotatedMember; | ||
| import com.fasterxml.jackson.databind.introspect.ObjectIdInfo; | ||
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| public class ObjectIdReference extends SettableBeanProperty { | ||
| private static final long serialVersionUID = 8465266677345565407L; | ||
| private static final Object UNRESOLVED = new Object(); | ||
| private SettableBeanProperty _forward; | ||
| private ObjectIdInfo _objectIdInfo; | ||
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| public ObjectIdReference(SettableBeanProperty forward, ObjectIdInfo objectIdInfo) { | ||
| super(forward.getFullName(), | ||
| forward.getType(), | ||
| forward.getWrapperName(), | ||
| forward.getValueTypeDeserializer(), | ||
| null, | ||
| forward.getMetadata()); | ||
| _forward = forward; | ||
| _objectIdInfo = objectIdInfo; | ||
| } | ||
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| public ObjectIdReference(ObjectIdReference src, JsonDeserializer<?> deser) { | ||
| super(src, deser); | ||
| _forward = src._forward; | ||
| _objectIdInfo = src._objectIdInfo; | ||
| } | ||
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| public ObjectIdReference(ObjectIdReference src, PropertyName newName) { | ||
| super(src, newName); | ||
| _forward = src._forward; | ||
| _objectIdInfo = src._objectIdInfo; | ||
| } | ||
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| @Override | ||
| public SettableBeanProperty withValueDeserializer(JsonDeserializer<?> deser) { | ||
| return new ObjectIdReference(this, deser); | ||
| } | ||
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| @Override | ||
| public SettableBeanProperty withName(PropertyName newName) { | ||
| return new ObjectIdReference(this, newName); | ||
| } | ||
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| @Override | ||
| public <A extends Annotation> A getAnnotation(Class<A> acls) { | ||
| return _forward.getAnnotation(acls); | ||
| } | ||
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| @Override | ||
| public AnnotatedMember getMember() { | ||
| return _forward.getMember(); | ||
| } | ||
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| @Override | ||
| public void deserializeAndSet(JsonParser jp, DeserializationContext ctxt, Object instance) throws IOException, | ||
| JsonProcessingException { | ||
| set(instance, _deserialize(jp, ctxt, instance)); | ||
| } | ||
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| @Override | ||
| public Object deserializeSetAndReturn(JsonParser jp, DeserializationContext ctxt, Object instance) | ||
| throws IOException, JsonProcessingException { | ||
| return setAndReturn(instance, _deserialize(jp, ctxt, instance)); | ||
| } | ||
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| private Object _deserialize(JsonParser jp, DeserializationContext ctxt, Object instance) throws JsonProcessingException, IOException { | ||
| if(_objectIdInfo != null &&_objectIdInfo.getAlwaysAsId()){ | ||
| return deserializeFromObjectId(jp, ctxt, instance); | ||
| } | ||
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| JsonToken currentToken = jp.getCurrentToken(); | ||
| if(currentToken == JsonToken.VALUE_STRING || currentToken == JsonToken.VALUE_NUMBER_INT){ | ||
| return deserializeFromObjectId(jp, ctxt, instance); | ||
| } | ||
| return _forward.deserialize(jp, ctxt); | ||
| } | ||
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| protected Object deserializeFromObjectId(JsonParser jp, DeserializationContext ctxt, Object instance) throws IOException, | ||
| JsonProcessingException { | ||
| ObjectIdReader reader = _forward.getValueDeserializer().getObjectIdReader(); | ||
| Object id = reader.getDeserializer().deserialize(jp, ctxt); | ||
| ReadableObjectId roid = ctxt.findObjectId(id, reader.generator); | ||
| // do we have it resolved? | ||
| Object pojo = roid.item; | ||
| if (pojo == null) { // not yet; should wait... | ||
| roid.appendReferring(instance, _forward); | ||
| return UNRESOLVED; | ||
| } | ||
| return pojo; | ||
| } | ||
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| @Override | ||
| public void set(Object instance, Object value) throws IOException { | ||
| if(value == UNRESOLVED) return; | ||
| _forward.set(instance, value); | ||
| } | ||
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| @Override | ||
| public Object setAndReturn(Object instance, Object value) throws IOException { | ||
| if(value== UNRESOLVED){ | ||
| return null; | ||
| } | ||
| return _forward.setAndReturn(instance, value); | ||
| } | ||
| } |