SingleCursor (Ignite 2.17.0)

java.lang.Object
- org.apache.ignite.internal.cache.query.index.SingleCursor<T>

Type Parameters:

T - class of value to return.

All Implemented Interfaces:

GridCursor<T>
```
public class SingleCursor<T>
extends Object
implements GridCursor<T>
```
Cursor that holds single value only.

Constructor Summary

Constructors
Constructor Description

SingleCursor(T val)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`T`	`get()`	Note that this implementation violates the contract of GridCusror.
`boolean`	`next()`	Attempt to move cursor position forward.

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

- Constructor Detail
  - SingleCursor
```
public SingleCursor(T val)
```
- Method Detail
  - next
```
public boolean next()
```
    Attempt to move cursor position forward.
    
    Specified by:
    
    next in interface GridCursor<T>
    
    Returns:
    
    true If we were able to move position of cursor forward.
  - get
```
public T get()
      throws IgniteCheckedException
```
    Note that this implementation violates the contract of GridCusror. It must be "before first" but this implementation handles both cases: "before first" and "on first". Current implementation of SQL with H2 relies on this null for queries like "select max(col) from table". This should be fixed for other SQL engines. https://issues.apache.org/jira/browse/IGNITE-14303.
    
    Specified by:
    
    get in interface GridCursor<T>
    
    Returns:
    
    Element at current position.
    
    Throws:
    
    IgniteCheckedException - If failed.