Jackie-Jiang commented on code in PR #15349: URL: https://github.com/apache/pinot/pull/15349#discussion_r2017436039
########## pinot-core/src/main/java/org/apache/pinot/core/geospatial/transform/function/GridDiskFunction.java: ########## @@ -0,0 +1,91 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 org.apache.pinot.core.geospatial.transform.function; + +import com.google.common.base.Preconditions; +import java.util.List; +import java.util.Map; +import javax.annotation.Nullable; +import org.apache.pinot.core.operator.ColumnContext; +import org.apache.pinot.core.operator.blocks.ValueBlock; +import org.apache.pinot.core.operator.transform.TransformResultMetadata; +import org.apache.pinot.core.operator.transform.function.BaseTransformFunction; +import org.apache.pinot.core.operator.transform.function.TransformFunction; +import org.apache.pinot.spi.data.FieldSpec; +import org.roaringbitmap.RoaringBitmap; + +/** + * Function that returns all H3 indexes within a specified hexagonal grid distance from a given origin index. + * The function takes two arguments: + * - gridDisk(origin, k) + */ +public class GridDiskFunction extends BaseTransformFunction { + public static final String FUNCTION_NAME = "gridDisk"; + private TransformFunction _originArgument; + private TransformFunction _kArgument; + + @Override + public String getName() { + return FUNCTION_NAME; + } + + @Override + public void init(List<TransformFunction> arguments, Map<String, ColumnContext> columnContextMap) { + super.init(arguments, columnContextMap); + Preconditions.checkArgument(arguments.size() == 2, "Transform function %s requires 2 arguments", getName()); + + TransformFunction transformFunction = arguments.get(0); + Preconditions.checkArgument(transformFunction.getResultMetadata().isSingleValue(), + "First argument (origin) must be single-valued for transform function: %s", getName()); + _originArgument = transformFunction; + + transformFunction = arguments.get(1); + Preconditions.checkArgument(transformFunction.getResultMetadata().isSingleValue(), + "Second argument (k) must be single-valued for transform function: %s", getName()); + _kArgument = transformFunction; + } + + @Override + public TransformResultMetadata getResultMetadata() { + // Returns a list of H3 indexes, so it's multi-valued + return new TransformResultMetadata(FieldSpec.DataType.LONG, false, false); + } + + @Override + @Nullable + public RoaringBitmap getNullBitmap(ValueBlock valueBlock) { Review Comment: This shouldn't be overridden -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
