/*
* Copyright 2015 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.data2.dataset2.lib.cube;
import co.cask.cdap.api.dataset.lib.cube.CubeFact;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Default implementation of {@link Aggregation}.
*/
public class DefaultAggregation implements Aggregation {
private final List<String> aggregateDimensions;
private final Set<String> requiredDimensions;
/**
* Creates instance of {@link DefaultAggregation} with all tags being optional.
* @param aggregateDimensions tags to be included in aggregation.
*/
public DefaultAggregation(List<String> aggregateDimensions) {
this(aggregateDimensions, new HashSet<String>());
}
/**
* Creates instance of {@link DefaultAggregation}.
* <p/>
* See also {@link Aggregation#getDimensionNames()} for more info on aggregateDimensions.
*
* @param aggregateDimensions dimensions to be included in aggregation.
* @param requiredDimensions dimensions that must be present in {@link co.cask.cdap.api.dataset.lib.cube.CubeFact}
* for aggregated value to be stored.
*/
public DefaultAggregation(List<String> aggregateDimensions, Collection<String> requiredDimensions) {
this.aggregateDimensions = ImmutableList.copyOf(aggregateDimensions);
this.requiredDimensions = ImmutableSet.copyOf(requiredDimensions);
}
@Override
public List<String> getDimensionNames() {
return aggregateDimensions;
}
public Set<String> getRequiredDimensions() {
return requiredDimensions;
}
@Override
public boolean accept(CubeFact fact) {
return fact.getDimensionValues().keySet().containsAll(requiredDimensions);
}
}