[FLINK-8422] [core] Checkstyle for org.apache.flink.api.java.tuple

Update TupleGenerator for Flink's checkstyle and rebuild Tuple and
TupleBuilder classes.

This closes #5292.

flink-core/src/main/java/org/apache/flink/api/java/tuple/Tuple.java

@@ -27,21 +27,21 @@
  * which may all be of different types. Because Tuples are strongly typed, each distinct
  * tuple length is represented by its own class. Tuples exists with up to 25 fields and
  * are described in the classes {@link Tuple1} to {@link Tuple25}.
- * <p>
- * The fields in the tuples may be accessed directly a public fields, or via position (zero indexed)
+ *
+ * <p>The fields in the tuples may be accessed directly a public fields, or via position (zero indexed)
  * {@link #getField(int)}.
- * <p>
- * Tuples are in principle serializable. However, they may contain non-serializable fields,
+ *
+ * <p>Tuples are in principle serializable. However, they may contain non-serializable fields,
  * in which case serialization will fail.
  */
 @Public
 public abstract class Tuple implements java.io.Serializable {
- 
+
  private static final long serialVersionUID = 1L;
- 
+
  public static final int MAX_ARITY = 25;
- 
- 
+
+
  /**
  * Gets the field at the specified position.
  *
@@ -50,11 +50,11 @@ public abstract class Tuple implements java.io.Serializable {
  * @throws IndexOutOfBoundsException Thrown, if the position is negative, or equal to, or larger than the number of fields.
  */
  public abstract <T> T getField(int pos);
- 
+
  /**
  * Gets the field at the specified position, throws NullFieldException if the field is null. Used for comparing key fields.
- * 
- * @param pos The position of the field, zero indexed. 
+ *
+ * @param pos The position of the field, zero indexed.
  * @return The field at the specified position.
  * @throws IndexOutOfBoundsException Thrown, if the position is negative, or equal to, or larger than the number of fields.
  * @throws NullFieldException Thrown, if the field at pos is null.
@@ -91,11 +91,11 @@ public <T> T getFieldNotNull(int pos){
  public abstract <T extends Tuple> T copy();
 
  // --------------------------------------------------------------------------------------------
- 
+
  /**
  * Gets the class corresponding to the tuple of the given arity (dimensions). For
  * example, {@code getTupleClass(3)} will return the {@code Tuple3.class}.
- * 
+ *
  * @param arity The arity of the tuple class to get.
  * @return The tuple class with the given arity.
  */
@@ -106,12 +106,12 @@ public static Class<? extends Tuple> getTupleClass(int arity) {
  }
  return (Class<? extends Tuple>) CLASSES[arity];
  }
- 
- // -------------------------------------------------------------------------------------------- 
+
+ // --------------------------------------------------------------------------------------------
  // The following lines are generated.
  // --------------------------------------------------------------------------------------------
- 
- // BEGIN_OF_TUPLE_DEPENDENT_CODE 
+
+ // BEGIN_OF_TUPLE_DEPENDENT_CODE
  // GENERATED FROM org.apache.flink.api.java.tuple.TupleGenerator.
  private static final Class<?>[] CLASSES = new Class<?>[] {
  Tuple0.class, Tuple1.class, Tuple2.class, Tuple3.class, Tuple4.class, Tuple5.class, Tuple6.class, Tuple7.class, Tuple8.class, Tuple9.class, Tuple10.class, Tuple11.class, Tuple12.class, Tuple13.class, Tuple14.class, Tuple15.class, Tuple16.class, Tuple17.class, Tuple18.class, Tuple19.class, Tuple20.class, Tuple21.class, Tuple22.class, Tuple23.class, Tuple24.class, Tuple25.class

flink-core/src/main/java/org/apache/flink/api/java/tuple/Tuple0.java

@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -15,6 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.apache.flink.api.java.tuple;
 
 import org.apache.flink.annotation.Public;
@@ -23,21 +24,21 @@
 
 /**
  * A tuple with 0 fields.
- * 
+ *
  * <p>The Tuple0 is a soft singleton, i.e., there is a "singleton" instance, but it does
  * not prevent creation of additional instances.</p>
- * 
+ *
  * @see Tuple
  */
 @Public
 public class Tuple0 extends Tuple {
  private static final long serialVersionUID = 1L;
 
- /** An immutable reusable Tuple0 instance */
+ // an immutable reusable Tuple0 instance
  public static final Tuple0 INSTANCE = new Tuple0();
 
  // ------------------------------------------------------------------------
- 
+
  @Override
  public int getArity() {
  return 0;
@@ -68,8 +69,8 @@ public Tuple0 copy(){
  // -------------------------------------------------------------------------------------------------
 
  /**
- * Creates a string representation of the tuple in the form "()"
- * 
+ * Creates a string representation of the tuple in the form "()".
+ *
  * @return The string representation of the tuple.
  */
  @Override
@@ -78,8 +79,8 @@ public String toString() {
  }
 
  /**
- * Deep equality for tuples by calling equals() on the tuple members
- * 
+ * Deep equality for tuples by calling equals() on the tuple members.
+ *
  * @param o
  * the object checked for equality
  * @return true if this is equal to o.

flink-core/src/main/java/org/apache/flink/api/java/tuple/Tuple1.java

@@ -16,13 +16,11 @@
  * limitations under the License.
  */
 
-
 // --------------------------------------------------------------
 // THIS IS A GENERATED SOURCE FILE. DO NOT EDIT!
 // GENERATED FROM org.apache.flink.api.java.tuple.TupleGenerator.
 // --------------------------------------------------------------
 
-
 package org.apache.flink.api.java.tuple;
 
 import org.apache.flink.annotation.Public;
@@ -70,7 +68,9 @@ public Tuple1(T0 value0) {
  }
 
  @Override
- public int getArity() { return 1; }
+ public int getArity() {
+ return 1;
+ }
 
  @Override
  @SuppressWarnings("unchecked")
@@ -119,17 +119,23 @@ public String toString() {
  }
 
  /**
- * Deep equality for tuples by calling equals() on the tuple members
+ * Deep equality for tuples by calling equals() on the tuple members.
  * @param o the object checked for equality
  * @return true if this is equal to o.
  */
  @Override
  public boolean equals(Object o) {
- if(this == o) { return true; }
- if (!(o instanceof Tuple1)) { return false; }
+ if (this == o) {
+ return true;
+ }
+ if (!(o instanceof Tuple1)) {
+ return false;
+ }
  @SuppressWarnings("rawtypes")
  Tuple1 tuple = (Tuple1) o;
- if (f0 != null ? !f0.equals(tuple.f0) : tuple.f0 != null) { return false; }
+ if (f0 != null ? !f0.equals(tuple.f0) : tuple.f0 != null) {
+ return false;
+ }
  return true;
  }
 
@@ -145,8 +151,8 @@ public int hashCode() {
  */
  @Override
  @SuppressWarnings("unchecked")
- public Tuple1<T0> copy(){ 
- return new Tuple1<T0>(this.f0);
+ public Tuple1<T0> copy() {
+ return new Tuple1<>(this.f0);
  }
 
  /**
@@ -158,6 +164,6 @@ public Tuple1<T0> copy(){
  * {@code new Tuple3<Integer, Double, String>(n, x, s)}
  */
  public static <T0> Tuple1<T0> of(T0 value0) {
- return new Tuple1<T0>(value0);
+ return new Tuple1<>(value0);
  }
 }

flink-core/src/main/java/org/apache/flink/api/java/tuple/Tuple10.java

@@ -16,13 +16,11 @@
  * limitations under the License.
  */
 
-
 // --------------------------------------------------------------
 // THIS IS A GENERATED SOURCE FILE. DO NOT EDIT!
 // GENERATED FROM org.apache.flink.api.java.tuple.TupleGenerator.
 // --------------------------------------------------------------
 
-
 package org.apache.flink.api.java.tuple;
 
 import org.apache.flink.annotation.Public;
@@ -115,7 +113,9 @@ public Tuple10(T0 value0, T1 value1, T2 value2, T3 value3, T4 value4, T5 value5,
  }
 
  @Override
- public int getArity() { return 10; }
+ public int getArity() {
+ return 10;
+ }
 
  @Override
  @SuppressWarnings("unchecked")
@@ -227,26 +227,50 @@ public String toString() {
  }
 
  /**
- * Deep equality for tuples by calling equals() on the tuple members
+ * Deep equality for tuples by calling equals() on the tuple members.
  * @param o the object checked for equality
  * @return true if this is equal to o.
  */
  @Override
  public boolean equals(Object o) {
- if(this == o) { return true; }
- if (!(o instanceof Tuple10)) { return false; }
+ if (this == o) {
+ return true;
+ }
+ if (!(o instanceof Tuple10)) {
+ return false;
+ }
  @SuppressWarnings("rawtypes")
  Tuple10 tuple = (Tuple10) o;
- if (f0 != null ? !f0.equals(tuple.f0) : tuple.f0 != null) { return false; }
- if (f1 != null ? !f1.equals(tuple.f1) : tuple.f1 != null) { return false; }
- if (f2 != null ? !f2.equals(tuple.f2) : tuple.f2 != null) { return false; }
- if (f3 != null ? !f3.equals(tuple.f3) : tuple.f3 != null) { return false; }
- if (f4 != null ? !f4.equals(tuple.f4) : tuple.f4 != null) { return false; }
- if (f5 != null ? !f5.equals(tuple.f5) : tuple.f5 != null) { return false; }
- if (f6 != null ? !f6.equals(tuple.f6) : tuple.f6 != null) { return false; }
- if (f7 != null ? !f7.equals(tuple.f7) : tuple.f7 != null) { return false; }
- if (f8 != null ? !f8.equals(tuple.f8) : tuple.f8 != null) { return false; }
- if (f9 != null ? !f9.equals(tuple.f9) : tuple.f9 != null) { return false; }
+ if (f0 != null ? !f0.equals(tuple.f0) : tuple.f0 != null) {
+ return false;
+ }
+ if (f1 != null ? !f1.equals(tuple.f1) : tuple.f1 != null) {
+ return false;
+ }
+ if (f2 != null ? !f2.equals(tuple.f2) : tuple.f2 != null) {
+ return false;
+ }
+ if (f3 != null ? !f3.equals(tuple.f3) : tuple.f3 != null) {
+ return false;
+ }
+ if (f4 != null ? !f4.equals(tuple.f4) : tuple.f4 != null) {
+ return false;
+ }
+ if (f5 != null ? !f5.equals(tuple.f5) : tuple.f5 != null) {
+ return false;
+ }
+ if (f6 != null ? !f6.equals(tuple.f6) : tuple.f6 != null) {
+ return false;
+ }
+ if (f7 != null ? !f7.equals(tuple.f7) : tuple.f7 != null) {
+ return false;
+ }
+ if (f8 != null ? !f8.equals(tuple.f8) : tuple.f8 != null) {
+ return false;
+ }
+ if (f9 != null ? !f9.equals(tuple.f9) : tuple.f9 != null) {
+ return false;
+ }
  return true;
  }
 
@@ -271,8 +295,8 @@ public int hashCode() {
  */
  @Override
  @SuppressWarnings("unchecked")
- public Tuple10<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9> copy(){ 
- return new Tuple10<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9>(this.f0,
+ public Tuple10<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> copy() {
+ return new Tuple10<>(this.f0,
  this.f1,
  this.f2,
  this.f3,
@@ -292,7 +316,16 @@ public Tuple10<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9> copy(){
  * instead of
  * {@code new Tuple3<Integer, Double, String>(n, x, s)}
  */
- public static <T0,T1,T2,T3,T4,T5,T6,T7,T8,T9> Tuple10<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9> of(T0 value0, T1 value1, T2 value2, T3 value3, T4 value4, T5 value5, T6 value6, T7 value7, T8 value8, T9 value9) {
- return new Tuple10<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9>(value0, value1, value2, value3, value4, value5, value6, value7, value8, value9);
+ public static <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> Tuple10<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> of(T0 value0, T1 value1, T2 value2, T3 value3, T4 value4, T5 value5, T6 value6, T7 value7, T8 value8, T9 value9) {
+ return new Tuple10<>(value0,
+ value1,
+ value2,
+ value3,
+ value4,
+ value5,
+ value6,
+ value7,
+ value8,
+ value9);
  }
 }