ai.rapids.cudf.AggregationOverWindow Maven / Gradle / Ivy
/*
*
* Copyright (c) 2020-2021, NVIDIA CORPORATION.
*
* 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 ai.rapids.cudf;
/**
* An Aggregation instance that also holds a column number and window metadata so the aggregation
* can be done over a specific window.
*/
public final class AggregationOverWindow {
private final RollingAggregationOnColumn wrapped;
protected final WindowOptions windowOptions;
AggregationOverWindow(RollingAggregationOnColumn wrapped, WindowOptions windowOptions) {
this.wrapped = wrapped;
this.windowOptions = windowOptions;
if (windowOptions == null) {
throw new IllegalArgumentException("WindowOptions cannot be null!");
}
if (windowOptions.getPrecedingCol() != null || windowOptions.getFollowingCol() != null) {
throw new UnsupportedOperationException("Dynamic windows (via columns) are currently unsupported!");
}
}
public WindowOptions getWindowOptions() {
return windowOptions;
}
@Override
public int hashCode() {
return 31 * super.hashCode() + windowOptions.hashCode();
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
} else if (other instanceof AggregationOverWindow) {
AggregationOverWindow o = (AggregationOverWindow) other;
return wrapped.equals(o.wrapped) && windowOptions.equals(o.windowOptions);
}
return false;
}
int getColumnIndex() {
return wrapped.getColumnIndex();
}
long createNativeInstance() {
return wrapped.createNativeInstance();
}
long getDefaultOutput() {
return wrapped.getDefaultOutput();
}
}