/*
* Copyright © 2014 Cask Data, Inc.
*
* 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 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 co.cask.cdap.api.dataset.lib;
import co.cask.cdap.api.annotation.Beta;
import co.cask.cdap.api.dataset.DatasetAdmin;
import co.cask.cdap.api.dataset.DatasetDefinition;
import co.cask.cdap.api.dataset.DatasetProperties;
import co.cask.cdap.api.dataset.DatasetSpecification;
import co.cask.cdap.api.dataset.table.Table;
import com.google.common.base.Preconditions;
import java.io.IOException;
import java.util.Map;
/**
* {@link DatasetDefinition} for {@link KeyValueTable}.
*/
@Beta
public class KeyValueTableDefinition
extends AbstractDatasetDefinition<KeyValueTable, DatasetAdmin> {
private final DatasetDefinition<? extends Table, ?> tableDef;
public KeyValueTableDefinition(String name, DatasetDefinition<? extends Table, ?> tableDef) {
super(name);
Preconditions.checkArgument(tableDef != null, "Table definition is required");
this.tableDef = tableDef;
}
@Override
public DatasetSpecification configure(String instanceName, DatasetProperties properties) {
return DatasetSpecification.builder(instanceName, getName())
.properties(properties.getProperties())
.datasets(tableDef.configure("kv", properties))
.build();
}
@Override
public DatasetAdmin getAdmin(DatasetSpecification spec, ClassLoader classLoader) throws IOException {
return tableDef.getAdmin(spec.getSpecification("kv"), classLoader);
}
@Override
public KeyValueTable getDataset(DatasetSpecification spec,
Map<String, String> arguments, ClassLoader classLoader) throws IOException {
Table table = tableDef.getDataset(spec.getSpecification("kv"), arguments, classLoader);
return new KeyValueTable(spec.getName(), table);
}
}