| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.asterix.metadata.entitytupletranslators; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.util.Calendar; |
| |
| import org.apache.asterix.external.api.IDataSourceAdapter; |
| import org.apache.asterix.external.dataset.adapter.AdapterIdentifier; |
| import org.apache.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import org.apache.asterix.metadata.MetadataException; |
| import org.apache.asterix.metadata.bootstrap.MetadataPrimaryIndexes; |
| import org.apache.asterix.metadata.bootstrap.MetadataRecordTypes; |
| import org.apache.asterix.metadata.entities.DatasourceAdapter; |
| import org.apache.asterix.om.base.ARecord; |
| import org.apache.asterix.om.base.AString; |
| import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference; |
| |
| public class DatasourceAdapterTupleTranslator extends AbstractTupleTranslator<DatasourceAdapter> { |
| |
| // Field indexes of serialized Adapter in a tuple. |
| // First key field. |
| public static final int ADAPTER_DATAVERSENAME_TUPLE_FIELD_INDEX = 0; |
| // Second key field. |
| public static final int ADAPTER_NAME_TUPLE_FIELD_INDEX = 1; |
| |
| // Payload field containing serialized Adapter. |
| public static final int ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX = 2; |
| |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ARecord> recordSerDes = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(MetadataRecordTypes.DATASOURCE_ADAPTER_RECORDTYPE); |
| |
| protected DatasourceAdapterTupleTranslator(boolean getTuple) { |
| super(getTuple, MetadataPrimaryIndexes.DATASOURCE_ADAPTER_DATASET.getFieldCount()); |
| } |
| |
| @Override |
| public DatasourceAdapter getMetadataEntityFromTuple(ITupleReference tuple) throws MetadataException, IOException { |
| byte[] serRecord = tuple.getFieldData(ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX); |
| int recordStartOffset = tuple.getFieldStart(ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX); |
| int recordLength = tuple.getFieldLength(ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX); |
| ByteArrayInputStream stream = new ByteArrayInputStream(serRecord, recordStartOffset, recordLength); |
| DataInput in = new DataInputStream(stream); |
| ARecord adapterRecord = recordSerDes.deserialize(in); |
| return createAdapterFromARecord(adapterRecord); |
| } |
| |
| private DatasourceAdapter createAdapterFromARecord(ARecord adapterRecord) { |
| String dataverseName = ((AString) adapterRecord |
| .getValueByPos(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_DATAVERSENAME_FIELD_INDEX)) |
| .getStringValue(); |
| String adapterName = |
| ((AString) adapterRecord.getValueByPos(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_NAME_FIELD_INDEX)) |
| .getStringValue(); |
| String classname = ((AString) adapterRecord |
| .getValueByPos(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_CLASSNAME_FIELD_INDEX)).getStringValue(); |
| IDataSourceAdapter.AdapterType adapterType = IDataSourceAdapter.AdapterType.valueOf( |
| ((AString) adapterRecord.getValueByPos(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_TYPE_FIELD_INDEX)) |
| .getStringValue()); |
| |
| return new DatasourceAdapter(new AdapterIdentifier(dataverseName, adapterName), classname, adapterType); |
| } |
| |
| @Override |
| public ITupleReference getTupleFromMetadataEntity(DatasourceAdapter adapter) throws IOException, MetadataException { |
| // write the key in the first 2 fields of the tuple |
| tupleBuilder.reset(); |
| aString.setValue(adapter.getAdapterIdentifier().getNamespace()); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| aString.setValue(adapter.getAdapterIdentifier().getName()); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| |
| // write the pay-load in the third field of the tuple |
| |
| recordBuilder.reset(MetadataRecordTypes.DATASOURCE_ADAPTER_RECORDTYPE); |
| |
| // write field 0 |
| fieldValue.reset(); |
| aString.setValue(adapter.getAdapterIdentifier().getNamespace()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_DATAVERSENAME_FIELD_INDEX, fieldValue); |
| |
| // write field 1 |
| fieldValue.reset(); |
| aString.setValue(adapter.getAdapterIdentifier().getName()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_NAME_FIELD_INDEX, fieldValue); |
| |
| // write field 2 |
| fieldValue.reset(); |
| aString.setValue(adapter.getClassname()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_CLASSNAME_FIELD_INDEX, fieldValue); |
| |
| // write field 3 |
| fieldValue.reset(); |
| aString.setValue(adapter.getType().name()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_TYPE_FIELD_INDEX, fieldValue); |
| |
| // write field 4 |
| fieldValue.reset(); |
| aString.setValue(Calendar.getInstance().getTime().toString()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.DATASOURCE_ADAPTER_ARECORD_TIMESTAMP_FIELD_INDEX, fieldValue); |
| |
| // write record |
| recordBuilder.write(tupleBuilder.getDataOutput(), true); |
| tupleBuilder.addFieldEndOffset(); |
| |
| tuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray()); |
| return tuple; |
| } |
| |
| } |