| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.asterix.metadata.entitytupletranslators; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import edu.uci.ics.asterix.builders.OrderedListBuilder; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.metadata.bootstrap.MetadataPrimaryIndexes; |
| import edu.uci.ics.asterix.metadata.bootstrap.MetadataRecordTypes; |
| import edu.uci.ics.asterix.metadata.entities.Function; |
| import edu.uci.ics.asterix.om.base.AOrderedList; |
| import edu.uci.ics.asterix.om.base.ARecord; |
| import edu.uci.ics.asterix.om.base.AString; |
| import edu.uci.ics.asterix.om.base.IACursor; |
| import edu.uci.ics.asterix.om.types.AOrderedListType; |
| import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference; |
| |
| /** |
| * Translates a Function metadata entity to an ITupleReference and vice versa. |
| */ |
| public class FunctionTupleTranslator extends AbstractTupleTranslator<Function> { |
| // Field indexes of serialized Function in a tuple. |
| // First key field. |
| public static final int FUNCTION_DATAVERSENAME_TUPLE_FIELD_INDEX = 0; |
| // Second key field. |
| public static final int FUNCTION_FUNCTIONNAME_TUPLE_FIELD_INDEX = 1; |
| // Third key field. |
| public static final int FUNCTION_FUNCTIONARITY_TUPLE_FIELD_INDEX = 2; |
| |
| |
| // Payload field containing serialized Function. |
| public static final int FUNCTION_PAYLOAD_TUPLE_FIELD_INDEX = 3; |
| |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ARecord> recordSerDes = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(MetadataRecordTypes.FUNCTION_RECORDTYPE); |
| |
| public FunctionTupleTranslator(boolean getTuple) { |
| super(getTuple, MetadataPrimaryIndexes.FUNCTION_DATASET.getFieldCount()); |
| } |
| |
| @Override |
| public Function getMetadataEntytiFromTuple(ITupleReference frameTuple) throws IOException { |
| byte[] serRecord = frameTuple.getFieldData(FUNCTION_PAYLOAD_TUPLE_FIELD_INDEX); |
| int recordStartOffset = frameTuple.getFieldStart(FUNCTION_PAYLOAD_TUPLE_FIELD_INDEX); |
| int recordLength = frameTuple.getFieldLength(FUNCTION_PAYLOAD_TUPLE_FIELD_INDEX); |
| ByteArrayInputStream stream = new ByteArrayInputStream(serRecord, recordStartOffset, recordLength); |
| DataInput in = new DataInputStream(stream); |
| ARecord functionRecord = (ARecord) recordSerDes.deserialize(in); |
| return createFunctionFromARecord(functionRecord); |
| } |
| |
| private Function createFunctionFromARecord(ARecord functionRecord) { |
| String dataverseName = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_DATAVERSENAME_FIELD_INDEX)).getStringValue(); |
| String functionName = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTIONNAME_FIELD_INDEX)).getStringValue(); |
| String arity = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_ARITY_FIELD_INDEX)).getStringValue(); |
| |
| IACursor cursor = ((AOrderedList) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_PARAM_LIST_FIELD_INDEX)).getCursor(); |
| List<String> params = new ArrayList<String>(); |
| while (cursor.next()) { |
| params.add(((AString) cursor.get()).getStringValue()); |
| } |
| |
| String returnType = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_RETURN_TYPE_FIELD_INDEX)).getStringValue(); |
| |
| String definition = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_DEFINITION_FIELD_INDEX)).getStringValue(); |
| |
| String language = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_LANGUAGE_FIELD_INDEX)).getStringValue(); |
| |
| String functionKind = ((AString) functionRecord |
| .getValueByPos(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_KIND_FIELD_INDEX)).getStringValue(); |
| return new Function(dataverseName, functionName, Integer.parseInt(arity), params, returnType, definition, |
| language, functionKind); |
| |
| } |
| |
| @Override |
| public ITupleReference getTupleFromMetadataEntity(Function function) throws IOException { |
| // write the key in the first 2 fields of the tuple |
| tupleBuilder.reset(); |
| aString.setValue(function.getDataverseName()); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| aString.setValue(function.getName()); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| aString.setValue(function.getArity() + ""); |
| stringSerde.serialize(aString, tupleBuilder.getDataOutput()); |
| tupleBuilder.addFieldEndOffset(); |
| |
| // write the pay-load in the fourth field of the tuple |
| |
| recordBuilder.reset(MetadataRecordTypes.FUNCTION_RECORDTYPE); |
| |
| // write field 0 |
| fieldValue.reset(); |
| aString.setValue(function.getDataverseName()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_DATAVERSENAME_FIELD_INDEX, fieldValue); |
| |
| // write field 1 |
| fieldValue.reset(); |
| aString.setValue(function.getName()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTIONNAME_FIELD_INDEX, fieldValue); |
| |
| // write field 2 |
| fieldValue.reset(); |
| aString.setValue(function.getArity() + ""); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_ARITY_FIELD_INDEX, fieldValue); |
| |
| // write field 3 |
| OrderedListBuilder listBuilder = new OrderedListBuilder(); |
| ArrayBackedValueStorage itemValue = new ArrayBackedValueStorage(); |
| listBuilder |
| .reset((AOrderedListType) MetadataRecordTypes.FUNCTION_RECORDTYPE.getFieldTypes()[MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_PARAM_LIST_FIELD_INDEX]); |
| for (String param : function.getParams()) { |
| itemValue.reset(); |
| aString.setValue(param); |
| stringSerde.serialize(aString, itemValue.getDataOutput()); |
| listBuilder.addItem(itemValue); |
| } |
| fieldValue.reset(); |
| listBuilder.write(fieldValue.getDataOutput(), true); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_PARAM_LIST_FIELD_INDEX, fieldValue); |
| |
| // write field 4 |
| fieldValue.reset(); |
| aString.setValue(function.getReturnType()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_RETURN_TYPE_FIELD_INDEX, fieldValue); |
| |
| // write field 5 |
| fieldValue.reset(); |
| aString.setValue(function.getFunctionBody()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_DEFINITION_FIELD_INDEX, fieldValue); |
| |
| // write field 6 |
| fieldValue.reset(); |
| aString.setValue(function.getLanguage()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_LANGUAGE_FIELD_INDEX, fieldValue); |
| |
| // write field 7 |
| fieldValue.reset(); |
| aString.setValue(function.getKind()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| recordBuilder.addField(MetadataRecordTypes.FUNCTION_ARECORD_FUNCTION_KIND_FIELD_INDEX, fieldValue); |
| |
| // write record |
| recordBuilder.write(tupleBuilder.getDataOutput(), true); |
| tupleBuilder.addFieldEndOffset(); |
| |
| tuple.reset(tupleBuilder.getFieldEndOffsets(), tupleBuilder.getByteArray()); |
| return tuple; |
| } |
| |
| } |