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Merge pull request #60 from metosin/tatu_faster
Faster de-serialization of Maps and Vectors
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| package jsonista.jackson; | ||
|
|
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| import com.fasterxml.jackson.core.JsonParser; | ||
| import com.fasterxml.jackson.core.JsonToken; | ||
| import com.fasterxml.jackson.databind.*; | ||
| import com.fasterxml.jackson.databind.deser.ContextualDeserializer; | ||
| import com.fasterxml.jackson.databind.deser.std.StdDeserializer; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
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| public class ArrayListDeserializer extends StdDeserializer<List<Object>> implements ContextualDeserializer { | ||
|
|
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| private JsonDeserializer<Object> _valueDeserializer; | ||
|
|
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| public ArrayListDeserializer() { | ||
| super(List.class); | ||
| } | ||
|
|
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| public ArrayListDeserializer(JsonDeserializer<Object> valueDeser) { | ||
| this(); | ||
| _valueDeserializer = valueDeser; | ||
| } | ||
|
|
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| @Override | ||
| public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty beanProperty) throws JsonMappingException { | ||
| JavaType object = ctxt.constructType(Object.class); | ||
| JsonDeserializer<Object> valueDeser = ctxt.findNonContextualValueDeserializer(object); | ||
| return this.withResolved(valueDeser); | ||
| } | ||
|
|
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| private JsonDeserializer<List<Object>> withResolved(JsonDeserializer<Object> valueDeser) { | ||
| return this._valueDeserializer == valueDeser ? this : new ArrayListDeserializer(valueDeser); | ||
| } | ||
|
|
||
| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public List<Object> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { | ||
| ArrayList<Object> list = new ArrayList<>(); | ||
|
|
||
| JsonDeserializer<Object> deser = ctxt.findNonContextualValueDeserializer(ctxt.constructType(Object.class)); | ||
| while (p.nextValue() != JsonToken.END_ARRAY) { | ||
| list.add(deser.deserialize(p, ctxt)); | ||
| } | ||
| return list; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package jsonista.jackson; | ||
|
|
||
| import com.fasterxml.jackson.core.JsonParser; | ||
| import com.fasterxml.jackson.core.JsonToken; | ||
| import com.fasterxml.jackson.databind.*; | ||
| import com.fasterxml.jackson.databind.deser.ContextualDeserializer; | ||
| import com.fasterxml.jackson.databind.deser.std.StdDeserializer; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
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| public class HashMapDeserializer extends StdDeserializer<Map<Object, Object>> implements ContextualDeserializer { | ||
|
|
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| private KeyDeserializer _keyDeserializer; | ||
| private JsonDeserializer<?> _valueDeserializer; | ||
|
|
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| public HashMapDeserializer() { | ||
| super(Map.class); | ||
| } | ||
|
|
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| public HashMapDeserializer(KeyDeserializer keyDeser, JsonDeserializer<?> valueDeser) { | ||
| this(); | ||
| _keyDeserializer = keyDeser; | ||
| _valueDeserializer = valueDeser; | ||
| } | ||
|
|
||
| protected HashMapDeserializer withResolved(KeyDeserializer keyDeser, JsonDeserializer<?> valueDeser) { | ||
| return this._keyDeserializer == keyDeser && this._valueDeserializer == valueDeser ? this : new HashMapDeserializer(keyDeser, valueDeser); | ||
| } | ||
|
|
||
| @Override | ||
| public JsonDeserializer<Map<Object, Object>> createContextual(DeserializationContext ctxt, BeanProperty beanProperty) throws JsonMappingException { | ||
| JavaType object = ctxt.constructType(Object.class); | ||
| KeyDeserializer keyDeser = ctxt.findKeyDeserializer(object, null); | ||
| JsonDeserializer<Object> valueDeser = ctxt.findNonContextualValueDeserializer(object); | ||
| return this.withResolved(keyDeser, valueDeser); | ||
| } | ||
|
|
||
| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public Map<Object, Object> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { | ||
| Map<Object, Object> map = new HashMap<>(); | ||
| while (p.nextToken() != JsonToken.END_OBJECT) { | ||
| Object key = _keyDeserializer.deserializeKey(p.getCurrentName(), ctxt); | ||
| p.nextToken(); | ||
| Object value = _valueDeserializer.deserialize(p, ctxt); | ||
| map.put(key, value); | ||
| } | ||
| return map; | ||
| } | ||
| } |
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