singhpk234 commented on code in PR #11180: URL: https://github.com/apache/iceberg/pull/11180#discussion_r1798637028
########## core/src/main/java/org/apache/iceberg/rest/RESTFileScanTaskParser.java: ########## @@ -0,0 +1,109 @@ +/* + * 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.iceberg.rest; + +import com.fasterxml.jackson.core.JsonGenerator; +import com.fasterxml.jackson.databind.JsonNode; +import java.io.IOException; +import java.util.List; +import org.apache.iceberg.BaseFileScanTask; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DeleteFile; +import org.apache.iceberg.FileScanTask; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.expressions.ExpressionParser; +import org.apache.iceberg.expressions.Expressions; +import org.apache.iceberg.expressions.ResidualEvaluator; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList; + +public class RESTFileScanTaskParser { + private static final String DATA_FILE = "data-file"; + private static final String DELETE_FILE_REFERENCES = "delete-file-references"; + private static final String RESIDUAL = "residual-filter"; + + private RESTFileScanTaskParser() {} + + public static void toJson( + FileScanTask fileScanTask, List<DeleteFile> deleteFiles, JsonGenerator generator) + throws IOException { + Preconditions.checkArgument(fileScanTask != null, "Invalid file scan task: null"); + Preconditions.checkArgument(generator != null, "Invalid JSON generator: null"); + + generator.writeStartObject(); + generator.writeFieldName(DATA_FILE); + RESTContentFileParser.toJson(fileScanTask.file(), generator); + + // TODO revisit this logic + if (deleteFiles != null) { + generator.writeArrayFieldStart(DELETE_FILE_REFERENCES); + for (int delIndex = 0; delIndex < deleteFiles.size(); delIndex++) { + generator.writeNumber(delIndex); + } + generator.writeEndArray(); + } + if (fileScanTask.residual() != null) { + generator.writeFieldName(RESIDUAL); + ExpressionParser.toJson(fileScanTask.residual(), generator); + } + generator.writeEndObject(); + } + + public static FileScanTask fromJson(JsonNode jsonNode, List<DeleteFile> allDeleteFiles) { + Preconditions.checkArgument(jsonNode != null, "Invalid JSON node for file scan task: null"); + Preconditions.checkArgument( + jsonNode.isObject(), "Invalid JSON node for file scan task: non-object (%s)", jsonNode); + + DataFile dataFile = (DataFile) RESTContentFileParser.fromJson(jsonNode.get(DATA_FILE)); + + DeleteFile[] matchedDeleteFiles = null; + List<Integer> deleteFileReferences = null; + if (jsonNode.has(DELETE_FILE_REFERENCES)) { + ImmutableList.Builder deleteFileReferencesBuilder = ImmutableList.builder(); + JsonNode deletesArray = jsonNode.get(DELETE_FILE_REFERENCES); + for (JsonNode deleteRef : deletesArray) { + deleteFileReferencesBuilder.add(deleteRef); + } + deleteFileReferences = deleteFileReferencesBuilder.build(); + } + + if (deleteFileReferences != null) { + ImmutableList.Builder matchedDeleteFilesBuilder = ImmutableList.builder(); + for (Integer deleteFileIdx : deleteFileReferences) { + matchedDeleteFilesBuilder.add(allDeleteFiles.get(deleteFileIdx)); + } + matchedDeleteFiles = (DeleteFile[]) matchedDeleteFilesBuilder.build().stream().toArray(); + } + + // TODO revisit this in spec + Expression filter = Expressions.alwaysTrue(); + if (jsonNode.has(RESIDUAL)) { + filter = ExpressionParser.fromJson(jsonNode.get(RESIDUAL)); + } + + ResidualEvaluator residualEvaluator = ResidualEvaluator.of(filter); + + // TODO at the time of creation we dont have the schemaString and specString so can we avoid + // setting this + // will need to refresh before returning closed iterable of tasks, for now put place holder null + BaseFileScanTask baseFileScanTask = + new BaseFileScanTask(dataFile, matchedDeleteFiles, null, null, residualEvaluator); Review Comment: [doubt] These fileScanTasks can be belong to diff snapshots and we would have to bind this this UnboundFileScanTask to get FileScanTask via first getting the schema of the snapshot this fileScan task belongs to then get PartitionSpec from binding that schema with the UnboundedPartitionSpec and then we get to it. Do we have a metadata for mapping FileScanTask to a snapshot id ? ref this interesting case : https://github.com/apache/iceberg/issues/11162 -- 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: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
