QueryFactory (mdsal-docs 8.0.0 API)

All Known Implementing Classes:

DefaultQueryFactory, OSGiQueryFactory
```
@Beta
public interface QueryFactory
```
Primary entry point to creating QueryExpression instances.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`<T extends DataObject> @NonNull DescendantQueryBuilder<T>`	`querySubtree(InstanceIdentifier<T> rootPath)`	Create a new `DescendantQueryBuilder` for a specified root path.

- Method Detail
  - querySubtree
```
<T extends DataObject> @NonNull DescendantQueryBuilder<T> querySubtree(InstanceIdentifier<T> rootPath)
```
    Create a new DescendantQueryBuilder for a specified root path. Root path must be a non-wildcard InstanceIdentifier in general sense. If the target type represents a list, the last path argument may be a wildcard, in which case the path is interpreted to search the specified list. Inner path elements have to be always non-wildcarded.
    
    Type Parameters:
    
    T - Target object type
    
    Parameters:
    
    rootPath - Subtree root
    
    Returns:
    
    a subtree query instance
    
    Throws:
    
    IllegalArgumentException - if rootPath is incorrect
    
    NullPointerException - if rootPath is null