IndexReaderContext (Jackrabbit Oak 1.78.0 API)

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

Direct Known Subclasses:

AtomicReaderContext, CompositeReaderContext
```
public abstract class IndexReaderContext
extends Object
```
A struct like class that represents a hierarchical relationship between IndexReader instances.

Field Summary

Fields
Modifier and Type	Field	Description
`int`	`docBaseInParent`	the doc base for this reader in the parent, `0` if parent is null
`boolean`	`isTopLevel`	`true` if this context struct represents the top level reader within the hierarchical context
`int`	`ordInParent`	the ord for this reader in the parent, `0` if parent is null
`CompositeReaderContext`	`parent`	The reader context for this reader's immediate parent, or null if none

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract List<IndexReaderContext>`	`children()`	Returns the context's children iff this context is a composite context otherwise `null`.
`abstract List<AtomicReaderContext>`	`leaves()`	Returns the context's leaves if this context is a top-level context.
`abstract IndexReader`	`reader()`	Returns the `IndexReader`, this context represents.

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

- Field Detail
  - parent
```
public final CompositeReaderContext parent
```
    The reader context for this reader's immediate parent, or null if none
  - isTopLevel
```
public final boolean isTopLevel
```
    true if this context struct represents the top level reader within the hierarchical context
  - docBaseInParent
```
public final int docBaseInParent
```
    the doc base for this reader in the parent, 0 if parent is null
  - ordInParent
```
public final int ordInParent
```
    the ord for this reader in the parent, 0 if parent is null
- Method Detail
  - reader
```
public abstract IndexReader reader()
```
    Returns the IndexReader, this context represents.
  - leaves
```
public abstract List<AtomicReaderContext> leaves()
                                          throws UnsupportedOperationException
```
    Returns the context's leaves if this context is a top-level context. For convenience, if this is an AtomicReaderContext this returns itself as the only leaf.
    Note: this is convenience method since leaves can always be obtained by walking the context tree using children().
    
    Throws:
    
    UnsupportedOperationException - if this is not a top-level context.
    
    See Also:
    
    children()
  - children
```
public abstract List<IndexReaderContext> children()
```
    Returns the context's children iff this context is a composite context otherwise null.