PayloadProcessorProvider (Lucene 3.6.2 API)

java.lang.Object
- org.apache.lucene.index.PayloadProcessorProvider

```
public abstract class PayloadProcessorProvider
extends Object
```
Provides a PayloadProcessorProvider.ReaderPayloadProcessor to be used for a Directory. This allows using different PayloadProcessorProvider.ReaderPayloadProcessors for different source IndexReader, for e.g. to perform different processing of payloads of different directories.
NOTE: to avoid processing payloads of certain directories, you can return null in getReaderProcessor(org.apache.lucene.index.IndexReader).
NOTE: it is possible that the same PayloadProcessorProvider.ReaderPayloadProcessor will be requested for the same Directory concurrently. Therefore, to avoid concurrency issues you should return different instances for different threads. Usually, if your PayloadProcessorProvider.ReaderPayloadProcessor does not maintain state this is not a problem. The merge code ensures that the PayloadProcessorProvider.ReaderPayloadProcessor instance you return will be accessed by one thread to obtain the PayloadProcessorProvider.PayloadProcessors for different terms.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`PayloadProcessorProvider.DirPayloadProcessor`	Deprecated. Use `PayloadProcessorProvider.ReaderPayloadProcessor` instead.
`static class`	`PayloadProcessorProvider.PayloadProcessor`	Processes the given payload.
`static class`	`PayloadProcessorProvider.ReaderPayloadProcessor`	Returns a `PayloadProcessorProvider.PayloadProcessor` for a given `Term` which allows processing the payloads of different terms differently.

Constructor Summary

Constructors
Constructor Description

PayloadProcessorProvider()

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`PayloadProcessorProvider.DirPayloadProcessor`	`getDirProcessor(Directory dir)`	Deprecated. Use `getReaderProcessor(org.apache.lucene.index.IndexReader)` instead.
`PayloadProcessorProvider.ReaderPayloadProcessor`	`getReaderProcessor(IndexReader reader)`	Returns a `PayloadProcessorProvider.ReaderPayloadProcessor` for the given `Directory`, through which `PayloadProcessorProvider.PayloadProcessor`s can be obtained for each `Term`, or `null` if none should be used.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PayloadProcessorProvider
```
public PayloadProcessorProvider()
```
- Method Detail
  - getReaderProcessor
```
public PayloadProcessorProvider.ReaderPayloadProcessor getReaderProcessor(IndexReader reader)
                                                                   throws IOException
```
    Returns a PayloadProcessorProvider.ReaderPayloadProcessor for the given Directory, through which PayloadProcessorProvider.PayloadProcessors can be obtained for each Term, or null if none should be used. You should override this method, not getDirProcessor(org.apache.lucene.store.Directory).
    
    Throws:
    
    IOException
  - getDirProcessor
```
@Deprecated
public PayloadProcessorProvider.DirPayloadProcessor getDirProcessor(Directory dir)
                                                             throws IOException
```
    Deprecated.
    Use getReaderProcessor(org.apache.lucene.index.IndexReader) instead. You can still select by Directory, if you retrieve the underlying directory from IndexReader.directory().
    
    Returns a PayloadProcessorProvider.DirPayloadProcessor for the given Directory, through which PayloadProcessorProvider.PayloadProcessors can be obtained for each Term, or null if none should be used.
    
    Throws:
    
    IOException