Rename (Apache Jena ARQ)

```
public class Rename
extends Object
```
Support for renaming all the variables in an algebra expession except for a fixed set to leave alone

Constructors
Constructor and Description
`Rename()`

Methods
Modifier and Type	Method and Description
`static Var`	`chooseVarName(Var var, Collection<Var> inUse, String prefix)` Given an old name, and some names already in use, pick a fresh, new name
`static Op`	`renameNode(Op op, Node oldName, Node newName)` Rename one node to another
`static Op`	`renameVar(Op op, Var oldName, Var newName)` Rename one variable to another
`static ExprList`	`renameVars(ExprList exprList, Set<Var> constants)` Rename all variables in an expression, EXCEPT for those named as constant
`static Expr`	`renameVars(Expr expr, Set<Var> constants)`
`static Op`	`renameVars(Op op, Collection<Var> constants)` Rename all variables in a pattern, EXCEPT for those named as constant
`static Op`	`reverseVarRename(Op op, boolean repeatedly)` Undo the effect of the rename operation, once or repeatedly.

public static Var chooseVarName(Var var,
                Collection<Var> inUse,
                String prefix)

Given an old name, and some names already in use, pick a fresh, new name

public static Op renameNode(Op op,
            Node oldName,
            Node newName)

Rename one node to another

public static Op renameVar(Op op,
           Var oldName,
           Var newName)

Rename one variable to another

public static Op renameVars(Op op,
            Collection<Var> constants)

Rename all variables in a pattern, EXCEPT for those named as constant

public static ExprList renameVars(ExprList exprList,
                  Set<Var> constants)

Rename all variables in an expression, EXCEPT for those named as constant

public static Expr renameVars(Expr expr,
              Set<Var> constants)

Class Rename