Package org.apache.flink.api.java.functions

Interface Summary

Interface	Description
KeySelector<IN,KEY>	The KeySelector allows to use arbitrary objects for operations such as reduce, reduceGroup, join, coGoup, etc.

Class Summary

Class	Description
FlatMapIterator<IN,OUT>	A convenience variant of the RichFlatMapFunction that returns elements through an iterator, rather then through a collector.
FunctionAnnotation	This class defines the semantic assertions that can be added to functions.
GroupReduceIterator<IN,OUT>
RichCoGroupFunction<IN1,IN2,OUT>	Rich variant of the CoGroupFunction.
RichCrossFunction<IN1,IN2,OUT>	Rich variant of the CrossFunction.
RichFilterFunction<T>	Rich variant of the FilterFunction.
RichFlatCombineFunction<T>	Rich variant of the FlatCombineFunction.
RichFlatJoinFunction<IN1,IN2,OUT>	Rich variant of the FlatJoinFunction.
RichFlatMapFunction<IN,OUT>	Rich variant of the FlatMapFunction.
RichGroupReduceFunction<IN,OUT>	Rich variant of the GroupReduceFunction.
RichJoinFunction<IN1,IN2,OUT>	Rich variant of the JoinFunction.
RichMapFunction<IN,OUT>	Rich variant of the MapFunction.
RichReduceFunction<T>	Rich variant of the ReduceFunction.
SemanticPropUtil

Exception Summary

Exception	Description
InvalidTypesException	A special case of the InvalidProgramException, indicating that the types used in an operation are invalid or inconsistent.
UnsupportedLambdaExpressionException

Annotation Types Summary

Annotation Type	Description
FunctionAnnotation.ConstantFields	This annotation declares that a function leaves certain fields of its input values unmodified and only "forwards" or "copies" them to the return value.
FunctionAnnotation.ConstantFieldsExcept	This annotation declares that a function changes certain fields of its input values, while leaving all others unmodified and in place in the return value.
FunctionAnnotation.ConstantFieldsFirst	This annotation declares that a function leaves certain fields of its first input values unmodified and only "forwards" or "copies" them to the return value.
FunctionAnnotation.ConstantFieldsFirstExcept	This annotation declares that a function changes certain fields of its first input value, while leaving all others unmodified and in place in the return value.
FunctionAnnotation.ConstantFieldsSecond	This annotation declares that a function leaves certain fields of its second input values unmodified and only "forwards" or "copies" them to the return value.
FunctionAnnotation.ConstantFieldsSecondExcept	This annotation declares that a function changes certain fields of its second input value, while leaving all others unmodified and in place in the return value.
FunctionAnnotation.ReadFields	Specifies the fields of the input value of a user-defined that are accessed in the code.
FunctionAnnotation.ReadFieldsFirst	Specifies the fields of the second input value of a user-defined that are accessed in the code.
FunctionAnnotation.ReadFieldsSecond	Specifies the fields of the first input value of a user-defined that are accessed in the code.
RichGroupReduceFunction.Combinable	This annotation can be added to classes that extend RichGroupReduceFunction, in oder to mark them as "combinable".