CelAstOptimizer

All Known Implementing Classes:

ConstantFoldingOptimizer
```
public interface CelAstOptimizer
```
Public interface for performing a single, custom optimization on an AST.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`CelAbstractSyntaxTree`	`optimize(CelNavigableAst navigableAst, Cel cel)`	Optimizes a single AST.
`default CelAbstractSyntaxTree`	`replaceSubtree(CelAbstractSyntaxTree ast, CelExpr newExpr, long exprIdToReplace)`	Replaces a subtree in the given AST.

- Method Detail
  - optimize
```
CelAbstractSyntaxTree optimize(CelNavigableAst navigableAst,
                               Cel cel)
                        throws CelOptimizationException
```
    Optimizes a single AST.
    
    Throws:
    
    CelOptimizationException
  - replaceSubtree
```
default CelAbstractSyntaxTree replaceSubtree(CelAbstractSyntaxTree ast,
                                             CelExpr newExpr,
                                             long exprIdToReplace)
```
    Replaces a subtree in the given AST. This operation is intended for AST optimization purposes.
    This is a very dangerous operation. Callers should re-typecheck the mutated AST and additionally verify that the resulting AST is semantically valid.
    All expression IDs will be renumbered in a stable manner to ensure there's no ID collision between the nodes. The renumbering occurs even if the subtree was not replaced.
    This will scrub out the description, positions and line offsets from CelSource. If the source contains macro calls, its call IDs will be to be consistent with the renumbered IDs in the AST.
    
    Parameters:
    
    ast - Original ast to mutate.
    
    newExpr - New CelExpr to replace the subtree with.
    
    exprIdToReplace - Expression id of the subtree that is getting replaced.