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
FirstReducer<T>
FlatMapIterator<IN,OUT>	A convenience variant of the RichFlatMapFunction that returns elements through an iterator, rather then through a collector.
FormattingMapper<T>
FunctionAnnotation	This class defines the semantic assertions that can be added to functions.
GroupReduceIterator<IN,OUT>
SelectByMaxFunction<T extends Tuple>
SelectByMinFunction<T extends Tuple>
SemanticPropUtil

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.