Examples with ACollectionCursor org.apache.asterix.om.base.ACollectionCursor used on opensource projects

Example 1 with ACollectionCursor

use of org.apache.asterix.om.base.ACollectionCursor in project asterixdb by apache.

the class IndexTupleTranslator method getMetadataEntityFromTuple.

@Override
public Index getMetadataEntityFromTuple(ITupleReference frameTuple) throws MetadataException, HyracksDataException {
    byte[] serRecord = frameTuple.getFieldData(INDEX_PAYLOAD_TUPLE_FIELD_INDEX);
    int recordStartOffset = frameTuple.getFieldStart(INDEX_PAYLOAD_TUPLE_FIELD_INDEX);
    int recordLength = frameTuple.getFieldLength(INDEX_PAYLOAD_TUPLE_FIELD_INDEX);
    ByteArrayInputStream stream = new ByteArrayInputStream(serRecord, recordStartOffset, recordLength);
    DataInput in = new DataInputStream(stream);
    ARecord rec = recordSerde.deserialize(in);
    String dvName = ((AString) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_DATAVERSENAME_FIELD_INDEX)).getStringValue();
    String dsName = ((AString) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_DATASETNAME_FIELD_INDEX)).getStringValue();
    String indexName = ((AString) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_INDEXNAME_FIELD_INDEX)).getStringValue();
    IndexType indexStructure = IndexType.valueOf(((AString) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_INDEXSTRUCTURE_FIELD_INDEX)).getStringValue());
    IACursor fieldNameCursor = ((AOrderedList) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_SEARCHKEY_FIELD_INDEX)).getCursor();
    List<List<String>> searchKey = new ArrayList<>();
    AOrderedList fieldNameList;
    while (fieldNameCursor.next()) {
        fieldNameList = (AOrderedList) fieldNameCursor.get();
        IACursor nestedFieldNameCursor = (fieldNameList.getCursor());
        List<String> nestedFieldName = new ArrayList<>();
        while (nestedFieldNameCursor.next()) {
            nestedFieldName.add(((AString) nestedFieldNameCursor.get()).getStringValue());
        }
        searchKey.add(nestedFieldName);
    }
    int indexKeyTypeFieldPos = rec.getType().getFieldIndex(INDEX_SEARCHKEY_TYPE_FIELD_NAME);
    IACursor fieldTypeCursor = new ACollectionCursor();
    if (indexKeyTypeFieldPos > 0) {
        fieldTypeCursor = ((AOrderedList) rec.getValueByPos(indexKeyTypeFieldPos)).getCursor();
    }
    List<IAType> searchKeyType = new ArrayList<>(searchKey.size());
    while (fieldTypeCursor.next()) {
        String typeName = ((AString) fieldTypeCursor.get()).getStringValue();
        IAType fieldType = BuiltinTypeMap.getTypeFromTypeName(metadataNode, jobId, dvName, typeName, false);
        searchKeyType.add(fieldType);
    }
    int isEnforcedFieldPos = rec.getType().getFieldIndex(INDEX_ISENFORCED_FIELD_NAME);
    Boolean isEnforcingKeys = false;
    if (isEnforcedFieldPos > 0) {
        isEnforcingKeys = ((ABoolean) rec.getValueByPos(isEnforcedFieldPos)).getBoolean();
    }
    Boolean isPrimaryIndex = ((ABoolean) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_ISPRIMARY_FIELD_INDEX)).getBoolean();
    int pendingOp = ((AInt32) rec.getValueByPos(MetadataRecordTypes.INDEX_ARECORD_PENDINGOP_FIELD_INDEX)).getIntegerValue();
    // Check if there is a gram length as well.
    int gramLength = -1;
    int gramLenPos = rec.getType().getFieldIndex(GRAM_LENGTH_FIELD_NAME);
    if (gramLenPos >= 0) {
        gramLength = ((AInt32) rec.getValueByPos(gramLenPos)).getIntegerValue();
    }
    // Read a field-source-indicator field.
    List<Integer> keyFieldSourceIndicator = new ArrayList<>();
    int keyFieldSourceIndicatorIndex = rec.getType().getFieldIndex(INDEX_SEARCHKEY_SOURCE_INDICATOR_FIELD_NAME);
    if (keyFieldSourceIndicatorIndex >= 0) {
        IACursor cursor = ((AOrderedList) rec.getValueByPos(keyFieldSourceIndicatorIndex)).getCursor();
        while (cursor.next()) {
            keyFieldSourceIndicator.add((int) ((AInt8) cursor.get()).getByteValue());
        }
    } else {
        for (int index = 0; index < searchKey.size(); ++index) {
            keyFieldSourceIndicator.add(0);
        }
    }
    // index key type information is not persisted, thus we extract type information from the record metadata
    if (searchKeyType.isEmpty()) {
        try {
            Dataset dSet = metadataNode.getDataset(jobId, dvName, dsName);
            String datatypeName = dSet.getItemTypeName();
            String datatypeDataverseName = dSet.getItemTypeDataverseName();
            ARecordType recordDt = (ARecordType) metadataNode.getDatatype(jobId, datatypeDataverseName, datatypeName).getDatatype();
            String metatypeName = dSet.getMetaItemTypeName();
            String metatypeDataverseName = dSet.getMetaItemTypeDataverseName();
            ARecordType metaDt = null;
            if (metatypeName != null && metatypeDataverseName != null) {
                metaDt = (ARecordType) metadataNode.getDatatype(jobId, metatypeDataverseName, metatypeName).getDatatype();
            }
            try {
                searchKeyType = KeyFieldTypeUtil.getKeyTypes(recordDt, metaDt, searchKey, keyFieldSourceIndicator);
            } catch (AlgebricksException e) {
                throw new MetadataException(e);
            }
        } catch (RemoteException re) {
            throw HyracksDataException.create(re);
        }
    }
    return new Index(dvName, dsName, indexName, indexStructure, searchKey, keyFieldSourceIndicator, searchKeyType, gramLength, isEnforcingKeys, isPrimaryIndex, pendingOp);
}