slinkydeveloper commented on a change in pull request #17522: URL: https://github.com/apache/flink/pull/17522#discussion_r737497146
########## File path: flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/functions/casting/rules/ArrayToArrayCastRule.java ########## @@ -0,0 +1,213 @@ +/* + * 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.flink.table.planner.functions.casting.rules; + +import org.apache.flink.table.data.ArrayData; +import org.apache.flink.table.data.GenericArrayData; +import org.apache.flink.table.planner.functions.casting.CastCodeBlock; +import org.apache.flink.table.planner.functions.casting.CastRulePredicate; +import org.apache.flink.table.planner.functions.casting.CastRuleProvider; +import org.apache.flink.table.planner.functions.casting.CodeGeneratorCastRule; +import org.apache.flink.table.types.logical.ArrayType; +import org.apache.flink.table.types.logical.DistinctType; +import org.apache.flink.table.types.logical.LogicalType; +import org.apache.flink.table.types.logical.LogicalTypeRoot; + +import static org.apache.flink.table.planner.codegen.CodeGenUtils.className; +import static org.apache.flink.table.planner.codegen.CodeGenUtils.newName; +import static org.apache.flink.table.planner.functions.casting.rules.CastRuleUtils.functionCall; +import static org.apache.flink.table.types.logical.utils.LogicalTypeChecks.getFieldCount; +import static org.apache.flink.table.types.logical.utils.LogicalTypeChecks.getPrecision; +import static org.apache.flink.table.types.logical.utils.LogicalTypeChecks.getScale; + +/** Array to array casting rule. */ +public class ArrayToArrayCastRule + extends AbstractNullAwareCodeGeneratorCastRule<ArrayData, ArrayData> { + + public static final ArrayToArrayCastRule INSTANCE = new ArrayToArrayCastRule(); + + private ArrayToArrayCastRule() { + super( + CastRulePredicate.builder() + .predicate( + (input, target) -> + input.getTypeRoot() == LogicalTypeRoot.ARRAY + && target.getTypeRoot() == LogicalTypeRoot.ARRAY + && isValidArrayCasting( Review comment: > LogicalTypeCasts.supportsExplicitCast I'm not using it because this rule is meant to support only rules from the new stack. Once we'll have everything ported to the new stack, `CastRuleProvider` should always resolve a rule when `LogicalTypeCasts.supportsExplicitCast` returns true. -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
