ArrayWritableObjectInspector.java 文件源码

@Override
public Object getStructFieldData(final Object data, final StructField fieldRef) {
    if (data == null) {
        return null;
    }

    if (data instanceof ArrayWritable) {
        final ArrayWritable arr = (ArrayWritable) data;
        return arr.get()[((StructFieldImpl) fieldRef).getIndex()];
    }

    //since setStructFieldData and create return a list, getStructFieldData should be able to
    //handle list data. This is required when table serde is ParquetHiveSerDe and partition serde
    //is something else.
    if (data instanceof List) {
        return ((List) data).get(((StructFieldImpl) fieldRef).getIndex());
    }

    throw new UnsupportedOperationException("Cannot inspect " + data.getClass().getCanonicalName());
}