AbstractNullTransformer (Soot - a J*va Optimization Framework 4.6.0 API)

java.lang.Object
- soot.Transformer
- - soot.BodyTransformer
  - - soot.dexpler.DexTransformer
    - - soot.dexpler.AbstractNullTransformer

Direct Known Subclasses:

DexIfTransformer, DexNullTransformer
```
public abstract class AbstractNullTransformer
extends DexTransformer
```
Abstract base class for DexNullTransformer and DexIfTransformer.

Author:

Steven Arzt

Constructor Summary

Constructors
Constructor Description

AbstractNullTransformer()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected static boolean`	`isObject(Type t)`
`protected boolean`	`isZeroComparison(ConditionExpr expr)`	Examine expr if it is a comparison with 0.
`protected void`	`replaceWithNull(Unit u)`	Replace 0 with null in the given unit.

Methods inherited from class soot.dexpler.DexTransformer
collectDefinitionsWithAliases, findArrayType

Methods inherited from class soot.BodyTransformer
internalTransform, transform, transform, transform

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

- Constructor Detail
  - AbstractNullTransformer
```
public AbstractNullTransformer()
```
- Method Detail
  - isZeroComparison
```
protected boolean isZeroComparison(ConditionExpr expr)
```
    Examine expr if it is a comparison with 0.
    
    Parameters:
    
    expr - the ConditionExpr to examine
  - replaceWithNull
```
protected void replaceWithNull(Unit u)
```
    Replace 0 with null in the given unit.
    
    Parameters:
    
    u - the unit where 0 will be replaced with null.
  - isObject
```
protected static boolean isObject(Type t)
```