NonReducibleCompositeItem (container-search 7.533.16 API)

java.lang.Object
- com.yahoo.prelude.query.Item
- - com.yahoo.prelude.query.CompositeItem
  - - com.yahoo.prelude.query.NonReducibleCompositeItem

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

SameElementItem, WeakAndItem
```
public abstract class NonReducibleCompositeItem
extends CompositeItem
```
A composite item which specifies semantics which are not maintained if an instance with a single child is replaced by the single child. Most composites, like AND and OR, are reducible as e.g (AND a) is semantically equal to (a). This type functions as a marker type for query rewriters.

Author:

bratseth

Nested Class Summary
- Nested classes/interfaces inherited from class com.yahoo.prelude.query.Item
  Item.ItemCreator, Item.ItemType

Field Summary
- Fields inherited from class com.yahoo.prelude.query.Item
  connectedBacklink, connectedItem, connectivity, DEFAULT_WEIGHT, explicitSignificance, significance, uniqueID

Constructor Summary

Constructors
Constructor Description

NonReducibleCompositeItem()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Optional<Item>`	`extractSingleChild()`	Returns the single child of this, if this can be omitted without changes to recall semantics.

Methods inherited from class com.yahoo.prelude.query.CompositeItem
adding, addItem, addItem, appendBodyString, clone, disclose, encode, encodeThis, encodingArity, ensureNotInSubtree, equals, getItem, getItemCount, getItemIndex, getItemIterator, getTermCount, hashCode, isLocked, items, lock, removeItem, removeItem, setIndexName, setItem, shouldParenthize

Methods inherited from class com.yahoo.prelude.query.Item
addAnnotation, appendHeadingString, getAnnotation, getBytes, getCode, getCreator, getItemType, getLabel, getLanguage, getName, getParent, getWeight, hasAnnotation, hasConnectivityBackLink, hasUniqueID, isFilter, isFromSpecialToken, isProtected, isRanked, isRoot, putBytes, putString, setCreator, setFilter, setFromSpecialToken, setHasUniqueID, setLabel, setLanguage, setParent, setPositionData, setProtected, setRanked, setWeight, toString, usePositionData

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - NonReducibleCompositeItem
```
public NonReducibleCompositeItem()
```
- Method Detail
  - extractSingleChild
```
public Optional<Item> extractSingleChild()
```
    Description copied from class: CompositeItem
    
    Returns the single child of this, if this can be omitted without changes to recall semantics.
    
    Overrides:
    
    extractSingleChild in class CompositeItem