Java tutorial
/* * 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.streaming.api.datastream; import org.apache.flink.annotation.PublicEvolving; import org.apache.flink.api.common.typeinfo.TypeInformation; import org.apache.flink.api.java.tuple.Tuple; import org.apache.flink.api.java.tuple.Tuple1; import org.apache.flink.api.java.tuple.Tuple10; import org.apache.flink.api.java.tuple.Tuple11; import org.apache.flink.api.java.tuple.Tuple12; import org.apache.flink.api.java.tuple.Tuple13; import org.apache.flink.api.java.tuple.Tuple14; import org.apache.flink.api.java.tuple.Tuple15; import org.apache.flink.api.java.tuple.Tuple16; import org.apache.flink.api.java.tuple.Tuple17; import org.apache.flink.api.java.tuple.Tuple18; import org.apache.flink.api.java.tuple.Tuple19; import org.apache.flink.api.java.tuple.Tuple2; import org.apache.flink.api.java.tuple.Tuple20; import org.apache.flink.api.java.tuple.Tuple21; import org.apache.flink.api.java.tuple.Tuple22; import org.apache.flink.api.java.tuple.Tuple23; import org.apache.flink.api.java.tuple.Tuple24; import org.apache.flink.api.java.tuple.Tuple25; import org.apache.flink.api.java.tuple.Tuple3; import org.apache.flink.api.java.tuple.Tuple4; import org.apache.flink.api.java.tuple.Tuple5; import org.apache.flink.api.java.tuple.Tuple6; import org.apache.flink.api.java.tuple.Tuple7; import org.apache.flink.api.java.tuple.Tuple8; import org.apache.flink.api.java.tuple.Tuple9; import org.apache.flink.api.java.typeutils.TupleTypeInfo; import org.apache.flink.streaming.api.operators.StreamProject; import com.google.common.base.Preconditions; @PublicEvolving public class StreamProjection<IN> { private DataStream<IN> dataStream; private int[] fieldIndexes; protected StreamProjection(DataStream<IN> dataStream, int[] fieldIndexes) { if (!dataStream.getType().isTupleType()) { throw new RuntimeException("Only Tuple DataStreams can be projected"); } if (fieldIndexes.length == 0) { throw new IllegalArgumentException("project() needs to select at least one (1) field."); } else if (fieldIndexes.length > Tuple.MAX_ARITY - 1) { throw new IllegalArgumentException( "project() may select only up to (" + (Tuple.MAX_ARITY - 1) + ") fields."); } int maxFieldIndex = (dataStream.getType()).getArity(); for (int i = 0; i < fieldIndexes.length; i++) { Preconditions.checkElementIndex(fieldIndexes[i], maxFieldIndex); } this.dataStream = dataStream; this.fieldIndexes = fieldIndexes; } /** * Chooses a projectTupleX according to the length of * {@link org.apache.flink.streaming.api.datastream.StreamProjection#fieldIndexes} * * @return The projected DataStream. * @see org.apache.flink.api.java.operators.ProjectOperator.Projection */ @SuppressWarnings("unchecked") public <OUT extends Tuple> SingleOutputStreamOperator<OUT, ?> projectTupleX() { SingleOutputStreamOperator<OUT, ?> projOperator = null; switch (fieldIndexes.length) { case 1: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple1(); break; case 2: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple2(); break; case 3: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple3(); break; case 4: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple4(); break; case 5: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple5(); break; case 6: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple6(); break; case 7: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple7(); break; case 8: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple8(); break; case 9: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple9(); break; case 10: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple10(); break; case 11: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple11(); break; case 12: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple12(); break; case 13: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple13(); break; case 14: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple14(); break; case 15: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple15(); break; case 16: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple16(); break; case 17: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple17(); break; case 18: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple18(); break; case 19: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple19(); break; case 20: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple20(); break; case 21: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple21(); break; case 22: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple22(); break; case 23: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple23(); break; case 24: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple24(); break; case 25: projOperator = (SingleOutputStreamOperator<OUT, ?>) projectTuple25(); break; default: throw new IllegalStateException("Excessive arity in tuple."); } return projOperator; } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0> SingleOutputStreamOperator<Tuple1<T0>, ?> projectTuple1() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple1<T0>> tType = new TupleTypeInfo<Tuple1<T0>>(fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple1<T0>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1> SingleOutputStreamOperator<Tuple2<T0, T1>, ?> projectTuple2() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple2<T0, T1>> tType = new TupleTypeInfo<Tuple2<T0, T1>>(fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple2<T0, T1>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2> SingleOutputStreamOperator<Tuple3<T0, T1, T2>, ?> projectTuple3() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple3<T0, T1, T2>> tType = new TupleTypeInfo<Tuple3<T0, T1, T2>>(fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple3<T0, T1, T2>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3> SingleOutputStreamOperator<Tuple4<T0, T1, T2, T3>, ?> projectTuple4() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple4<T0, T1, T2, T3>> tType = new TupleTypeInfo<Tuple4<T0, T1, T2, T3>>(fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple4<T0, T1, T2, T3>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4> SingleOutputStreamOperator<Tuple5<T0, T1, T2, T3, T4>, ?> projectTuple5() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple5<T0, T1, T2, T3, T4>> tType = new TupleTypeInfo<Tuple5<T0, T1, T2, T3, T4>>(fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple5<T0, T1, T2, T3, T4>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5> SingleOutputStreamOperator<Tuple6<T0, T1, T2, T3, T4, T5>, ?> projectTuple6() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple6<T0, T1, T2, T3, T4, T5>> tType = new TupleTypeInfo<Tuple6<T0, T1, T2, T3, T4, T5>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple6<T0, T1, T2, T3, T4, T5>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6> SingleOutputStreamOperator<Tuple7<T0, T1, T2, T3, T4, T5, T6>, ?> projectTuple7() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple7<T0, T1, T2, T3, T4, T5, T6>> tType = new TupleTypeInfo<Tuple7<T0, T1, T2, T3, T4, T5, T6>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple7<T0, T1, T2, T3, T4, T5, T6>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7> SingleOutputStreamOperator<Tuple8<T0, T1, T2, T3, T4, T5, T6, T7>, ?> projectTuple8() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple8<T0, T1, T2, T3, T4, T5, T6, T7>> tType = new TupleTypeInfo<Tuple8<T0, T1, T2, T3, T4, T5, T6, T7>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple8<T0, T1, T2, T3, T4, T5, T6, T7>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8> SingleOutputStreamOperator<Tuple9<T0, T1, T2, T3, T4, T5, T6, T7, T8>, ?> projectTuple9() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple9<T0, T1, T2, T3, T4, T5, T6, T7, T8>> tType = new TupleTypeInfo<Tuple9<T0, T1, T2, T3, T4, T5, T6, T7, T8>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple9<T0, T1, T2, T3, T4, T5, T6, T7, T8>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> SingleOutputStreamOperator<Tuple10<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>, ?> projectTuple10() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple10<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>> tType = new TupleTypeInfo<Tuple10<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple10<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> SingleOutputStreamOperator<Tuple11<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>, ?> projectTuple11() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple11<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>> tType = new TupleTypeInfo<Tuple11<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple11<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> SingleOutputStreamOperator<Tuple12<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>, ?> projectTuple12() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple12<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>> tType = new TupleTypeInfo<Tuple12<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple12<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> SingleOutputStreamOperator<Tuple13<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>, ?> projectTuple13() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple13<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>> tType = new TupleTypeInfo<Tuple13<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple13<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>>(fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> SingleOutputStreamOperator<Tuple14<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13>, ?> projectTuple14() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple14<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13>> tType = new TupleTypeInfo<Tuple14<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple14<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> SingleOutputStreamOperator<Tuple15<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>, ?> projectTuple15() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple15<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>> tType = new TupleTypeInfo<Tuple15<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple15<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15> SingleOutputStreamOperator<Tuple16<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15>, ?> projectTuple16() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple16<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15>> tType = new TupleTypeInfo<Tuple16<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple16<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16> SingleOutputStreamOperator<Tuple17<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>, ?> projectTuple17() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple17<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>> tType = new TupleTypeInfo<Tuple17<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple17<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17> SingleOutputStreamOperator<Tuple18<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17>, ?> projectTuple18() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple18<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17>> tType = new TupleTypeInfo<Tuple18<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple18<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18> SingleOutputStreamOperator<Tuple19<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18>, ?> projectTuple19() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple19<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18>> tType = new TupleTypeInfo<Tuple19<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple19<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19> SingleOutputStreamOperator<Tuple20<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>, ?> projectTuple20() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple20<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>> tType = new TupleTypeInfo<Tuple20<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple20<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20> SingleOutputStreamOperator<Tuple21<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20>, ?> projectTuple21() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple21<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20>> tType = new TupleTypeInfo<Tuple21<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple21<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21> SingleOutputStreamOperator<Tuple22<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21>, ?> projectTuple22() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple22<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21>> tType = new TupleTypeInfo<Tuple22<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple22<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22> SingleOutputStreamOperator<Tuple23<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22>, ?> projectTuple23() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple23<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22>> tType = new TupleTypeInfo<Tuple23<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple23<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23> SingleOutputStreamOperator<Tuple24<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23>, ?> projectTuple24() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple24<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23>> tType = new TupleTypeInfo<Tuple24<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple24<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } /** * Projects a {@link Tuple} {@link DataStream} to the previously selected fields. * * @return The projected DataStream. * @see Tuple * @see DataStream */ public <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> SingleOutputStreamOperator<Tuple25<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24>, ?> projectTuple25() { TypeInformation<?>[] fTypes = extractFieldTypes(fieldIndexes, dataStream.getType()); TupleTypeInfo<Tuple25<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24>> tType = new TupleTypeInfo<Tuple25<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24>>( fTypes); return dataStream.transform("Projection", tType, new StreamProject<IN, Tuple25<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24>>( fieldIndexes, tType.createSerializer(dataStream.getExecutionConfig()))); } public static TypeInformation<?>[] extractFieldTypes(int[] fields, TypeInformation<?> inType) { TupleTypeInfo<?> inTupleType = (TupleTypeInfo<?>) inType; TypeInformation<?>[] fieldTypes = new TypeInformation[fields.length]; for (int i = 0; i < fields.length; i++) { fieldTypes[i] = inTupleType.getTypeAt(fields[i]); } return fieldTypes; } }