Package sootup.apk.frontend.interceptors

Class AbstractNullTransformer

java.lang.Object

sootup.apk.frontend.interceptors.DexTransformer

sootup.apk.frontend.interceptors.AbstractNullTransformer

All Implemented Interfaces:

BodyInterceptor

Direct Known Subclasses:

DexNullTransformer

public abstract class AbstractNullTransformer
extends DexTransformer

Abstract base class for DexNullTransformer

Author:

Palaniappan Muthuraman

Constructor Summary

Constructors

Constructor	Description
AbstractNullTransformer()

Method Summary

Modifier and Type	Method	Description
protected static boolean	isObject(Type t)
protected boolean	isZeroComparison(AbstractConditionExpr expr)	Examine expr if it is a comparison with 0.
protected Stmt	replaceWithNull(Stmt stmt)	Replaces 0 with null in the given statement.

Methods inherited from class sootup.apk.frontend.interceptors.DexTransformer

examineInvokeExpr, findArrayType, isFloatingPointLike

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface sootup.core.interceptor.BodyInterceptor

interceptBody

Constructor Details

AbstractNullTransformer

public AbstractNullTransformer()

Method Details

isZeroComparison

protected boolean isZeroComparison(AbstractConditionExpr expr)

Examine expr if it is a comparison with 0.

Parameters:

expr - the ConditionExpr to examine

replaceWithNull

protected Stmt replaceWithNull(Stmt stmt)

Replaces 0 with null in the given statement. Statements are immutable, so the caller has to put the returned statement into the body in place of the given one.

Parameters:

stmt - the statement where 0 will be replaced with null.

Returns:

the statement with null instead of 0, or the given statement if there is no 0 to replace

isObject

protected static boolean isObject(Type t)