| /* |
| * 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 org.apache.asterix.common.exceptions.AsterixException; |
| 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.CompactionPolicy; |
| 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; |
| |
| /** |
| * Translates a Dataset metadata entity to an ITupleReference and vice versa. |
| */ |
| public class CompactionPolicyTupleTranslator extends AbstractTupleTranslator<CompactionPolicy> { |
| // Field indexes of serialized CompactionPolicy in a tuple. |
| // Key field. |
| public static final int COMPACTION_POLICY_DATAVERSE_NAME_FIELD_INDEX = 0; |
| |
| public static final int COMPACTION_POLICY_NAME_FIELD_INDEX = 1; |
| |
| // Payload field containing serialized compactionPolicy. |
| public static final int COMPACTION_POLICY_PAYLOAD_TUPLE_FIELD_INDEX = 2; |
| |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ARecord> recordSerDes = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(MetadataRecordTypes.COMPACTION_POLICY_RECORDTYPE); |
| |
| public CompactionPolicyTupleTranslator(boolean getTuple) { |
| super(getTuple, MetadataPrimaryIndexes.COMPACTION_POLICY_DATASET.getFieldCount()); |
| } |
| |
| @Override |
| public CompactionPolicy getMetadataEntityFromTuple(ITupleReference tuple) throws IOException { |
| byte[] serRecord = tuple.getFieldData(COMPACTION_POLICY_PAYLOAD_TUPLE_FIELD_INDEX); |
| int recordStartOffset = tuple.getFieldStart(COMPACTION_POLICY_PAYLOAD_TUPLE_FIELD_INDEX); |
| int recordLength = tuple.getFieldLength(COMPACTION_POLICY_PAYLOAD_TUPLE_FIELD_INDEX); |
| ByteArrayInputStream stream = new ByteArrayInputStream(serRecord, recordStartOffset, recordLength); |
| DataInput in = new DataInputStream(stream); |
| ARecord compactionPolicyRecord = (ARecord) recordSerDes.deserialize(in); |
| return createCompactionPolicyFromARecord(compactionPolicyRecord); |
| } |
| |
| private CompactionPolicy createCompactionPolicyFromARecord(ARecord compactionPolicyRecord) { |
| CompactionPolicy compactionPolicy = null; |
| String dataverseName = ((AString) compactionPolicyRecord |
| .getValueByPos(MetadataRecordTypes.COMPACTION_POLICY_ARECORD_DATAVERSE_NAME_FIELD_INDEX)) |
| .getStringValue(); |
| String policyName = ((AString) compactionPolicyRecord |
| .getValueByPos(MetadataRecordTypes.COMPACTION_POLICY_ARECORD_POLICY_NAME_FIELD_INDEX)).getStringValue(); |
| String className = ((AString) compactionPolicyRecord |
| .getValueByPos(MetadataRecordTypes.COMPACTION_POLICY_ARECORD_CLASSNAME_FIELD_INDEX)).getStringValue(); |
| |
| compactionPolicy = new CompactionPolicy(dataverseName, policyName, className); |
| return compactionPolicy; |
| } |
| |
| @Override |
| public ITupleReference getTupleFromMetadataEntity(CompactionPolicy compactionPolicy) throws IOException, |
| MetadataException { |
| |
| tupleBuilder.reset(); |
| aString.setValue(compactionPolicy.getDataverseName()); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| |
| aString.setValue(compactionPolicy.getPolicyName()); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| |
| recordBuilder.reset(MetadataRecordTypes.COMPACTION_POLICY_RECORDTYPE); |
| |
| // write field 0 |
| fieldValue.reset(); |
| aString.setValue(compactionPolicy.getDataverseName()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.COMPACTION_POLICY_ARECORD_DATAVERSE_NAME_FIELD_INDEX, fieldValue); |
| |
| // write field 1 |
| fieldValue.reset(); |
| aString.setValue(compactionPolicy.getPolicyName()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.COMPACTION_POLICY_ARECORD_POLICY_NAME_FIELD_INDEX, fieldValue); |
| |
| // write field 2 |
| fieldValue.reset(); |
| aString.setValue(compactionPolicy.getClassName()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.COMPACTION_POLICY_ARECORD_CLASSNAME_FIELD_INDEX, fieldValue); |
| |
| // write record |
| try { |
| recordBuilder.write(tupleBuilder.getDataOutput(), true); |
| } catch (AsterixException e) { |
| throw new MetadataException(e); |
| } |
| tupleBuilder.addFieldEndOffset(); |
| |
| tuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray()); |
| return tuple; |
| } |
| } |