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75
...erde/src/main/java/org/openx/data/jsonserde/objectinspector/JsonUnionObjectInspector.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| package org.openx.data.jsonserde.objectinspector; | ||
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| import org.apache.hadoop.hive.serde2.SerDeException; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.*; | ||
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; | ||
| import org.openx.data.jsonserde.json.JSONArray; | ||
| import org.openx.data.jsonserde.json.JSONObject; | ||
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| import java.util.List; | ||
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| /** | ||
| * Created by rcongiu on 8/29/15. | ||
| */ | ||
| public class JsonUnionObjectInspector implements UnionObjectInspector { | ||
| JsonStructOIOptions options; | ||
| private List<ObjectInspector> ois; | ||
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| public JsonUnionObjectInspector(List<ObjectInspector> ois,JsonStructOIOptions opts) { | ||
| this.ois = ois; | ||
| options = opts; | ||
| } | ||
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| @Override | ||
| public List<ObjectInspector> getObjectInspectors() { | ||
| return ois; | ||
| } | ||
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| /* | ||
| * This method looks at the object and finds which object inspector should be used. | ||
| */ | ||
| @Override | ||
| public byte getTag(Object o) { | ||
| if(o==null) return 0; | ||
| for(byte i =0; i< ois.size(); i ++) { | ||
| ObjectInspector oi = ois.get(i); | ||
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| switch(oi.getCategory()) { | ||
| case LIST: if(o instanceof JSONArray) return i; else break; | ||
| case STRUCT: if(o instanceof JSONObject) return i; else break; | ||
| case MAP: if(o instanceof JSONObject) return i; else break; | ||
| case UNION: return i; | ||
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| case PRIMITIVE: { | ||
| PrimitiveObjectInspector poi = (PrimitiveObjectInspector) oi; | ||
| try { | ||
| // try to parse it, return if able to | ||
| poi.getPrimitiveJavaObject(o); | ||
| return i; | ||
| } catch (Exception ex) { continue;} | ||
| } | ||
| default :throw new Error("Object Inspector " + oi.toString() + " Not supported for object " + o.toString()); | ||
| } | ||
| } | ||
| throw new Error("No suitable Object Inspector found for object " + o.toString() + " of class " + o.getClass().getCanonicalName()); | ||
| } | ||
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| @Override | ||
| public Object getField(Object o) { | ||
| return o; | ||
| } | ||
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| @Override | ||
| public String getTypeName() { | ||
| return ObjectInspectorUtils.getStandardUnionTypeName(this); | ||
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| } | ||
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| @Override | ||
| public Category getCategory() { | ||
| return Category.UNION; | ||
| } | ||
| } |
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