| /* |
| * 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.codegen |
| |
| import org.apache.flink.api.common.io.GenericInputFormat |
| import org.apache.flink.table.api.types.InternalType |
| import org.apache.flink.table.codegen.CodeGenUtils.newName |
| import org.apache.flink.table.codegen.Indenter.toISC |
| import org.apache.flink.table.dataformat.GenericRow |
| |
| /** |
| * A code generator for generating Flink [[GenericInputFormat]]s. |
| */ |
| object InputFormatCodeGenerator { |
| |
| /** |
| * Generates a values input format that can be passed to Java compiler. |
| * |
| * @param ctx The code generator context |
| * @param name Class name of the input format. Must not be unique but has to be a |
| * valid Java class identifier. |
| * @param records code for creating records |
| * @param returnType expected return type |
| * @param outRecordTerm term of the output |
| * @tparam T Return type of the Flink Function. |
| * @return instance of GeneratedFunction |
| */ |
| def generateValuesInputFormat[T]( |
| ctx: CodeGeneratorContext, |
| name: String, |
| records: Seq[String], |
| returnType: InternalType, |
| outRecordTerm: String = CodeGeneratorContext.DEFAULT_OUT_RECORD_TERM, |
| outRecordWriterTerm: String = CodeGeneratorContext.DEFAULT_OUT_RECORD_WRITER_TERM) |
| : GeneratedInput[GenericInputFormat[T], T] = { |
| val funcName = newName(name) |
| |
| ctx.addOutputRecord(returnType, classOf[GenericRow], outRecordTerm, Some(outRecordWriterTerm)) |
| |
| val funcCode = j""" |
| public class $funcName extends ${classOf[GenericInputFormat[_]].getCanonicalName} { |
| |
| private int nextIdx = 0; |
| |
| ${ctx.reuseMemberCode()} |
| |
| public $funcName() throws Exception { |
| ${ctx.reuseInitCode()} |
| } |
| |
| @Override |
| public boolean reachedEnd() throws java.io.IOException { |
| return nextIdx >= ${records.length}; |
| } |
| |
| @Override |
| public Object nextRecord(Object reuse) { |
| switch (nextIdx) { |
| ${records.zipWithIndex.map { case (r, i) => |
| s""" |
| |case $i: |
| | $r |
| |break; |
| """.stripMargin |
| }.mkString("\n")} |
| } |
| nextIdx++; |
| return $outRecordTerm; |
| } |
| } |
| """.stripMargin |
| |
| GeneratedInput(funcName, funcCode) |
| } |
| } |