org.apache.flink.api.java.typeutils

Class TypeExtractor

java.lang.Object

org.apache.flink.api.java.typeutils.TypeExtractor

public class TypeExtractor
extends Object

A utility for reflection analysis on classes, to determine the return type of implementations of transformation functions.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TypeExtractor()

Method Summary

Modifier and Type	Method and Description
protected <OUT,IN1,IN2> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	analyzePojo(Class<OUT> clazz, ArrayList<Type> typeHierarchy, ParameterizedType parameterizedType, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	createTypeInfo(Class<?> baseClass, Class<?> clazz, int returnParamPos, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)
static org.apache.flink.api.common.typeinfo.TypeInformation<?>	createTypeInfo(Type t)
static List<Field>	getAllDeclaredFields(Class<?> clazz) recursively determine all declared fields This is required because class.getFields() is not returning fields defined in parent classes.
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getBinaryOperatorReturnType(org.apache.flink.api.common.functions.Function function, Class<?> baseClass, boolean hasIterables, boolean hasCollector, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type, String functionName, boolean allowMissing)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getCoGroupReturnTypes(org.apache.flink.api.common.functions.CoGroupFunction<IN1,IN2,OUT> coGroupInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getCoGroupReturnTypes(org.apache.flink.api.common.functions.CoGroupFunction<IN1,IN2,OUT> coGroupInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type, String functionName, boolean allowMissing)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getCrossReturnTypes(org.apache.flink.api.common.functions.CrossFunction<IN1,IN2,OUT> crossInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getCrossReturnTypes(org.apache.flink.api.common.functions.CrossFunction<IN1,IN2,OUT> crossInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type, String functionName, boolean allowMissing)
static Field	getDeclaredField(Class<?> clazz, String name)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getFlatJoinReturnTypes(org.apache.flink.api.common.functions.FlatJoinFunction<IN1,IN2,OUT> joinInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getFlatJoinReturnTypes(org.apache.flink.api.common.functions.FlatJoinFunction<IN1,IN2,OUT> joinInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getFlatMapReturnTypes(org.apache.flink.api.common.functions.FlatMapFunction<IN,OUT> flatMapInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getFlatMapReturnTypes(org.apache.flink.api.common.functions.FlatMapFunction<IN,OUT> flatMapInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getFoldReturnTypes(org.apache.flink.api.common.functions.FoldFunction<IN,OUT> foldInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getFoldReturnTypes(org.apache.flink.api.common.functions.FoldFunction<IN,OUT> foldInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static <X> org.apache.flink.api.common.typeinfo.TypeInformation<X>	getForClass(Class<X> clazz) Creates type information from a given Class such as Integer, String[] or POJOs.
static <X> org.apache.flink.api.common.typeinfo.TypeInformation<X>	getForObject(X value)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getGroupCombineReturnTypes(org.apache.flink.api.common.functions.GroupCombineFunction<IN,OUT> combineInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getGroupCombineReturnTypes(org.apache.flink.api.common.functions.GroupCombineFunction<IN,OUT> combineInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getGroupReduceReturnTypes(org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT> groupReduceInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getGroupReduceReturnTypes(org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT> groupReduceInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static <IN> org.apache.flink.api.common.typeinfo.TypeInformation<IN>	getInputFormatTypes(org.apache.flink.api.common.io.InputFormat<IN,?> inputFormatInterface)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getJoinReturnTypes(org.apache.flink.api.common.functions.JoinFunction<IN1,IN2,OUT> joinInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)
static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getJoinReturnTypes(org.apache.flink.api.common.functions.JoinFunction<IN1,IN2,OUT> joinInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type, org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getKeySelectorTypes(KeySelector<IN,OUT> selectorInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getKeySelectorTypes(KeySelector<IN,OUT> selectorInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getMapPartitionReturnTypes(org.apache.flink.api.common.functions.MapPartitionFunction<IN,OUT> mapPartitionInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getMapPartitionReturnTypes(org.apache.flink.api.common.functions.MapPartitionFunction<IN,OUT> mapPartitionInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getMapReturnTypes(org.apache.flink.api.common.functions.MapFunction<IN,OUT> mapInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getMapReturnTypes(org.apache.flink.api.common.functions.MapFunction<IN,OUT> mapInterface, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static Type	getParameterType(Class<?> baseClass, Class<?> clazz, int pos)
static <T> org.apache.flink.api.common.typeinfo.TypeInformation<T>	getPartitionerTypes(org.apache.flink.api.common.functions.Partitioner<T> partitioner)
static <T> org.apache.flink.api.common.typeinfo.TypeInformation<T>	getPartitionerTypes(org.apache.flink.api.common.functions.Partitioner<T> partitioner, String functionName, boolean allowMissing)
static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getUnaryOperatorReturnType(org.apache.flink.api.common.functions.Function function, Class<?> baseClass, boolean hasIterable, boolean hasCollector, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType, String functionName, boolean allowMissing)
static boolean	isClassType(Type t)
static Class<?>	typeToClass(Type t)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TypeExtractor

protected TypeExtractor()

Method Detail

getMapReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getMapReturnTypes(org.apache.flink.api.common.functions.MapFunction<IN,OUT> mapInterface,
                                                                                                   org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getMapReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getMapReturnTypes(org.apache.flink.api.common.functions.MapFunction<IN,OUT> mapInterface,
                                                                                                   org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                   String functionName,
                                                                                                   boolean allowMissing)

getFlatMapReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getFlatMapReturnTypes(org.apache.flink.api.common.functions.FlatMapFunction<IN,OUT> flatMapInterface,
                                                                                                       org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getFlatMapReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getFlatMapReturnTypes(org.apache.flink.api.common.functions.FlatMapFunction<IN,OUT> flatMapInterface,
                                                                                                       org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                       String functionName,
                                                                                                       boolean allowMissing)

getFoldReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getFoldReturnTypes(org.apache.flink.api.common.functions.FoldFunction<IN,OUT> foldInterface,
                                                                                                    org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getFoldReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getFoldReturnTypes(org.apache.flink.api.common.functions.FoldFunction<IN,OUT> foldInterface,
                                                                                                    org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                    String functionName,
                                                                                                    boolean allowMissing)

getMapPartitionReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getMapPartitionReturnTypes(org.apache.flink.api.common.functions.MapPartitionFunction<IN,OUT> mapPartitionInterface,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getMapPartitionReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getMapPartitionReturnTypes(org.apache.flink.api.common.functions.MapPartitionFunction<IN,OUT> mapPartitionInterface,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                            String functionName,
                                                                                                            boolean allowMissing)

getGroupReduceReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getGroupReduceReturnTypes(org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT> groupReduceInterface,
                                                                                                           org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getGroupReduceReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getGroupReduceReturnTypes(org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT> groupReduceInterface,
                                                                                                           org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                           String functionName,
                                                                                                           boolean allowMissing)

getGroupCombineReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getGroupCombineReturnTypes(org.apache.flink.api.common.functions.GroupCombineFunction<IN,OUT> combineInterface,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getGroupCombineReturnTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getGroupCombineReturnTypes(org.apache.flink.api.common.functions.GroupCombineFunction<IN,OUT> combineInterface,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                            String functionName,
                                                                                                            boolean allowMissing)

getFlatJoinReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getFlatJoinReturnTypes(org.apache.flink.api.common.functions.FlatJoinFunction<IN1,IN2,OUT> joinInterface,
                                                                                                             org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                             org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)

getFlatJoinReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getFlatJoinReturnTypes(org.apache.flink.api.common.functions.FlatJoinFunction<IN1,IN2,OUT> joinInterface,
                                                                                                             org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                             org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type,
                                                                                                             String functionName,
                                                                                                             boolean allowMissing)

getJoinReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getJoinReturnTypes(org.apache.flink.api.common.functions.JoinFunction<IN1,IN2,OUT> joinInterface,
                                                                                                         org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                         org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)

getJoinReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getJoinReturnTypes(org.apache.flink.api.common.functions.JoinFunction<IN1,IN2,OUT> joinInterface,
                                                                                                         org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                         org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type,
                                                                                                         String functionName,
                                                                                                         boolean allowMissing)

getCoGroupReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getCoGroupReturnTypes(org.apache.flink.api.common.functions.CoGroupFunction<IN1,IN2,OUT> coGroupInterface,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)

getCoGroupReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getCoGroupReturnTypes(org.apache.flink.api.common.functions.CoGroupFunction<IN1,IN2,OUT> coGroupInterface,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type,
                                                                                                            String functionName,
                                                                                                            boolean allowMissing)

getCrossReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getCrossReturnTypes(org.apache.flink.api.common.functions.CrossFunction<IN1,IN2,OUT> crossInterface,
                                                                                                          org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                          org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)

getCrossReturnTypes

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getCrossReturnTypes(org.apache.flink.api.common.functions.CrossFunction<IN1,IN2,OUT> crossInterface,
                                                                                                          org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                          org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type,
                                                                                                          String functionName,
                                                                                                          boolean allowMissing)

getKeySelectorTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getKeySelectorTypes(KeySelector<IN,OUT> selectorInterface,
                                                                                                     org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType)

getKeySelectorTypes

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getKeySelectorTypes(KeySelector<IN,OUT> selectorInterface,
                                                                                                     org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                     String functionName,
                                                                                                     boolean allowMissing)

getPartitionerTypes

public static <T> org.apache.flink.api.common.typeinfo.TypeInformation<T> getPartitionerTypes(org.apache.flink.api.common.functions.Partitioner<T> partitioner)

getPartitionerTypes

public static <T> org.apache.flink.api.common.typeinfo.TypeInformation<T> getPartitionerTypes(org.apache.flink.api.common.functions.Partitioner<T> partitioner,
                                                                                              String functionName,
                                                                                              boolean allowMissing)

getInputFormatTypes

public static <IN> org.apache.flink.api.common.typeinfo.TypeInformation<IN> getInputFormatTypes(org.apache.flink.api.common.io.InputFormat<IN,?> inputFormatInterface)

getUnaryOperatorReturnType

public static <IN,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getUnaryOperatorReturnType(org.apache.flink.api.common.functions.Function function,
                                                                                                            Class<?> baseClass,
                                                                                                            boolean hasIterable,
                                                                                                            boolean hasCollector,
                                                                                                            org.apache.flink.api.common.typeinfo.TypeInformation<IN> inType,
                                                                                                            String functionName,
                                                                                                            boolean allowMissing)

getBinaryOperatorReturnType

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getBinaryOperatorReturnType(org.apache.flink.api.common.functions.Function function,
                                                                                                                  Class<?> baseClass,
                                                                                                                  boolean hasIterables,
                                                                                                                  boolean hasCollector,
                                                                                                                  org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                                  org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type,
                                                                                                                  String functionName,
                                                                                                                  boolean allowMissing)

createTypeInfo

public static org.apache.flink.api.common.typeinfo.TypeInformation<?> createTypeInfo(Type t)

createTypeInfo

public static <IN1,IN2,OUT> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> createTypeInfo(Class<?> baseClass,
                                                                                                     Class<?> clazz,
                                                                                                     int returnParamPos,
                                                                                                     org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                                     org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)

getParameterType

public static Type getParameterType(Class<?> baseClass,
                                    Class<?> clazz,
                                    int pos)

getForClass

public static <X> org.apache.flink.api.common.typeinfo.TypeInformation<X> getForClass(Class<X> clazz)

Creates type information from a given Class such as Integer, String[] or POJOs. This method does not support ParameterizedTypes such as Tuples or complex type hierarchies. In most cases createTypeInfo(Type) is the recommended method for type extraction (a Class is a child of Type).

Parameters:

clazz - a Class to create TypeInformation for

Returns:

TypeInformation that describes the passed Class

analyzePojo

protected <OUT,IN1,IN2> org.apache.flink.api.common.typeinfo.TypeInformation<OUT> analyzePojo(Class<OUT> clazz,
                                                                                              ArrayList<Type> typeHierarchy,
                                                                                              ParameterizedType parameterizedType,
                                                                                              org.apache.flink.api.common.typeinfo.TypeInformation<IN1> in1Type,
                                                                                              org.apache.flink.api.common.typeinfo.TypeInformation<IN2> in2Type)

getAllDeclaredFields

public static List<Field> getAllDeclaredFields(Class<?> clazz)

recursively determine all declared fields This is required because class.getFields() is not returning fields defined in parent classes.

getDeclaredField

public static Field getDeclaredField(Class<?> clazz,
                                     String name)

typeToClass

public static Class<?> typeToClass(Type t)

isClassType

public static boolean isClassType(Type t)

getForObject

public static <X> org.apache.flink.api.common.typeinfo.TypeInformation<X> getForObject(X value)