IExecutionDataSamplerStore (Hop Engine 2.3.0 API)

All Known Implementing Classes:

BasicDataProfilingDataSamplerStore, ExecutionDataSamplerStoreBase, FirstRowsExecutionDataSamplerStore, LastRowsExecutionDataSamplerStore, RandomRowsExecutionDataSamplerStore
```
public interface IExecutionDataSamplerStore
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`IRowListener`	`createRowListener(IExecutionDataSampler<?> dataSampler)`	Create a row listener to attach to a transform
`Map<String,RowBuffer>`	`getSamples()`	Return a map of keys and rows of data.
`Map<String,ExecutionDataSetMeta>`	`getSamplesMetadata()`	Get some extra information about the data samples.
`void`	`init(IVariables variables, IRowMeta inputRowMeta, IRowMeta outputRowMeta)`	Initializes this sampler store

- Method Detail
  - init
```
void init(IVariables variables,
          IRowMeta inputRowMeta,
          IRowMeta outputRowMeta)
```
    Initializes this sampler store
    
    Parameters:
    
    variables - The variables to resolve with
    
    inputRowMeta - Transform input row metadata
    
    outputRowMeta - Transform output row metadata
  - createRowListener
```
IRowListener createRowListener(IExecutionDataSampler<?> dataSampler)
```
    Create a row listener to attach to a transform
    
    Returns:
    
    The row listener for this store.
  - getSamples
```
Map<String,RowBuffer> getSamples()
```
    Return a map of keys and rows of data. Every key represents a different type of sampling data.
    
    Returns:
    
    The samples map for the sampler store
  - getSamplesMetadata
```
Map<String,ExecutionDataSetMeta> getSamplesMetadata()
```
    Get some extra information about the data samples.
    
    Returns:
    
    The metadata map where for every key more information (description) is given about the sampled data.