com.facebook.presto.plugin.geospatial.aggregation.GeometryStateFactory Maven / Gradle / Ivy
/*
* 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 com.facebook.presto.plugin.geospatial.aggregation;
import com.esri.core.geometry.ogc.OGCGeometry;
import com.facebook.presto.array.ObjectBigArray;
import com.facebook.presto.spi.function.AccumulatorStateFactory;
import com.facebook.presto.spi.function.GroupedAccumulatorState;
public class GeometryStateFactory
implements AccumulatorStateFactory
{
@Override
public GeometryState createSingleState()
{
return new SingleGeometryState();
}
@Override
public Class extends GeometryState> getSingleStateClass()
{
return SingleGeometryState.class;
}
@Override
public GeometryState createGroupedState()
{
return new GroupedGeometryState();
}
@Override
public Class extends GeometryState> getGroupedStateClass()
{
return GroupedGeometryState.class;
}
public static class GroupedGeometryState
implements GeometryState, GroupedAccumulatorState
{
private long groupId;
private ObjectBigArray geometries = new ObjectBigArray<>();
private long size;
@Override
public OGCGeometry getGeometry()
{
return geometries.get(groupId);
}
@Override
public void setGeometry(OGCGeometry geometry, long previousMemorySize)
{
this.geometries.set(groupId, geometry);
size -= previousMemorySize;
if (geometry != null) {
size += geometry.estimateMemorySize();
}
}
@Override
public void ensureCapacity(long size)
{
geometries.ensureCapacity(size);
}
@Override
public long getEstimatedSize()
{
return size + geometries.sizeOf();
}
@Override
public final void setGroupId(long groupId)
{
this.groupId = groupId;
}
}
public static class SingleGeometryState
implements GeometryState
{
private OGCGeometry geometry;
@Override
public OGCGeometry getGeometry()
{
return geometry;
}
@Override
public void setGeometry(OGCGeometry geometry, long previousMemorySize)
{
this.geometry = geometry;
}
@Override
public long getEstimatedSize()
{
return geometry != null ? geometry.estimateMemorySize() : 0;
}
}
}
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