RichPatternSelectFunction (Flink : Libraries : CEP 2.1.0 API)

java.lang.Object
- org.apache.flink.api.common.functions.AbstractRichFunction
- - org.apache.flink.cep.RichPatternSelectFunction<IN,OUT>

Type Parameters:

IN - Type of the input elements

OUT - Type of the output element

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction, PatternSelectFunction<IN,OUT>
```
public abstract class RichPatternSelectFunction<IN,OUT>
extends org.apache.flink.api.common.functions.AbstractRichFunction
implements PatternSelectFunction<IN,OUT>
```
Rich variant of the PatternSelectFunction. As a RichFunction, it gives access to the RuntimeContext and provides setup and teardown methods: RichFunction.open(OpenContext) and RichFunction.close().

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  RichPatternSelectFunction()
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  abstract OUT select(Map<String,List<IN>> pattern)
  Generates a result from the given map of events.
  - Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction
    close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RichPatternSelectFunction
```
public RichPatternSelectFunction()
```
- Method Detail
  - select
```
public abstract OUT select(Map<String,List<IN>> pattern)
                    throws Exception
```
    Description copied from interface: PatternSelectFunction
    
    Generates a result from the given map of events. The events are identified by their names. Only one resulting element can be generated.
    
    Specified by:
    
    select in interface PatternSelectFunction<IN,OUT>
    
    Parameters:
    
    pattern - Map containing the found pattern. Events are identified by their names
    
    Returns:
    
    Resulting element
    
    Throws:
    
    Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail and may trigger recovery.