| /* |
| * Copyright 2009-2011 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.entities; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import edu.uci.ics.asterix.builders.IARecordBuilder; |
| import edu.uci.ics.asterix.builders.OrderedListBuilder; |
| import edu.uci.ics.asterix.builders.RecordBuilder; |
| import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.metadata.IDatasetDetails; |
| import edu.uci.ics.asterix.metadata.bootstrap.MetadataRecordTypes; |
| import edu.uci.ics.asterix.om.base.AMutableString; |
| import edu.uci.ics.asterix.om.base.AString; |
| import edu.uci.ics.asterix.om.types.AOrderedListType; |
| import edu.uci.ics.asterix.om.types.ARecordType; |
| import edu.uci.ics.asterix.om.types.BuiltinType; |
| import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage; |
| |
| public class ExternalDatasetDetails implements IDatasetDetails { |
| |
| private static final long serialVersionUID = 1L; |
| private final String adapter; |
| private final Map<String, String> properties; |
| |
| private final static ARecordType externalRecordType = MetadataRecordTypes.EXTERNAL_DETAILS_RECORDTYPE; |
| private final static ARecordType propertyRecordType = MetadataRecordTypes.DATASOURCE_ADAPTER_PROPERTIES_RECORDTYPE; |
| |
| public ExternalDatasetDetails(String adapter, Map<String, String> properties) { |
| this.properties = properties; |
| this.adapter = adapter; |
| } |
| |
| public String getAdapter() { |
| return adapter; |
| } |
| |
| public Map<String, String> getProperties() { |
| return properties; |
| } |
| |
| @Override |
| public DatasetType getDatasetType() { |
| return DatasetType.EXTERNAL; |
| } |
| |
| @Override |
| public void writeDatasetDetailsRecordType(DataOutput out) throws HyracksDataException { |
| IARecordBuilder externalRecordBuilder = new RecordBuilder(); |
| OrderedListBuilder listBuilder = new OrderedListBuilder(); |
| ArrayBackedValueStorage fieldValue = new ArrayBackedValueStorage(); |
| ArrayBackedValueStorage itemValue = new ArrayBackedValueStorage(); |
| externalRecordBuilder.reset(externalRecordType); |
| AMutableString aString = new AMutableString(""); |
| ISerializerDeserializer<AString> stringSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ASTRING); |
| |
| // write field 0 |
| fieldValue.reset(); |
| aString.setValue(this.getAdapter()); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| externalRecordBuilder.addField(MetadataRecordTypes.EXTERNAL_DETAILS_ARECORD_DATASOURCE_ADAPTER_FIELD_INDEX, fieldValue); |
| |
| // write field 1 |
| listBuilder.reset((AOrderedListType) externalRecordType.getFieldTypes()[1]); |
| for (Map.Entry<String, String> property : this.properties.entrySet()) { |
| String name = property.getKey(); |
| String value = property.getValue(); |
| itemValue.reset(); |
| writePropertyTypeRecord(name, value, itemValue.getDataOutput()); |
| listBuilder.addItem(itemValue); |
| } |
| fieldValue.reset(); |
| listBuilder.write(fieldValue.getDataOutput(), true); |
| externalRecordBuilder.addField(MetadataRecordTypes.EXTERNAL_DETAILS_ARECORD_PROPERTIES_FIELD_INDEX, fieldValue); |
| |
| try { |
| externalRecordBuilder.write(out, true); |
| } catch (IOException ioe) { |
| throw new HyracksDataException(ioe); |
| } |
| |
| } |
| |
| public void writePropertyTypeRecord(String name, String value, DataOutput out) throws HyracksDataException { |
| IARecordBuilder propertyRecordBuilder = new RecordBuilder(); |
| ArrayBackedValueStorage fieldValue = new ArrayBackedValueStorage(); |
| propertyRecordBuilder.reset(propertyRecordType); |
| AMutableString aString = new AMutableString(""); |
| ISerializerDeserializer<AString> stringSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ASTRING); |
| |
| // write field 0 |
| fieldValue.reset(); |
| aString.setValue(name); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| propertyRecordBuilder.addField(0, fieldValue); |
| |
| // write field 1 |
| fieldValue.reset(); |
| aString.setValue(value); |
| stringSerde.serialize(aString, fieldValue.getDataOutput()); |
| propertyRecordBuilder.addField(1, fieldValue); |
| |
| try { |
| propertyRecordBuilder.write(out, true); |
| } catch (IOException ioe) { |
| throw new HyracksDataException(ioe); |
| } |
| } |
| } |