Query

All Known Implementing Classes:

ChainedQuery, Children, Descendants, EmptyQuery, EnsureUnique, Filter, NullQuery, Parent
```
public interface Query
```
A Query instance transforms an input node set into an output node set.
Useful implementations will normally perform a sequence of graph traversal and node filtering operations to generate the query result.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.Set<TreeNode>`	`execute(java.util.Set<TreeNode> input)`	Transforms the `input` node set in to an output node set.

- Method Detail
  - execute
```
java.util.Set<TreeNode> execute(java.util.Set<TreeNode> input)
```
    Transforms the input node set in to an output node set.
    
    Parameters:
    
    input - query input node set
    
    Returns:
    
    the output node set