CelExprIdGeneratorFactory.StableIdGenerator

java.lang.Object
- dev.cel.common.ast.CelExprIdGeneratorFactory.StableIdGenerator

Enclosing class:

CelExprIdGeneratorFactory
```
public static class CelExprIdGeneratorFactory.StableIdGenerator
extends java.lang.Object
```
StableIdGenerator ensures new IDs are only created the first time they are encountered.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`hasId(long id)`	Checks if the given ID has been encountered before.
`void`	`memoize(long existingId, long newId)`	Memoize a given expression ID with a newly generated ID.
`long`	`nextExprId()`	Generates the next available ID.
`long`	`nextExprId(long id)`	Generate the next available ID while memoizing the existing ID.
`long`	`renumberId(long id)`	Renumbers the existing expression ID to a newly generated unique ID.

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

- Method Detail
  - hasId
```
public boolean hasId(long id)
```
    Checks if the given ID has been encountered before.
  - nextExprId
```
public long nextExprId()
```
    Generates the next available ID.
  - nextExprId
```
public long nextExprId(long id)
```
    Generate the next available ID while memoizing the existing ID.
    The main purpose of this is to sanitize a new AST to replace an existing AST's node with. The incoming AST may not have its IDs consistently numbered (often, the expr IDs are just zeroes). In those cases, we just want to return an incremented expr ID.
    The memoization becomes necessary if the incoming AST contains an expression with macro map populated, requiring a normalization pass. In this case, the method behaves largely the same as renumberId(long).
    
    Parameters:
    
    id - Existing ID to memoize. Providing 0 or less will skip the memoization, in which case this behaves just like a CelExprIdGeneratorFactory.MonotonicIdGenerator.
  - memoize
```
public void memoize(long existingId,
                    long newId)
```
    Memoize a given expression ID with a newly generated ID.
  - renumberId
```
public long renumberId(long id)
```
    Renumbers the existing expression ID to a newly generated unique ID. The existing ID is memoized, and calling this method again with the same ID will always return the same generated ID.