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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.optimize.evaluation;
import proguard.classfile.*;
import proguard.classfile.constant.RefConstant;
import proguard.evaluation.BasicInvocationUnit;
import proguard.evaluation.value.*;
import proguard.optimize.info.*;
/**
* This InvocationUnit stores parameter values and return values with the
* methods that are invoked.
*
* @see LoadingInvocationUnit
* @author Eric Lafortune
*/
public class StoringInvocationUnit
extends BasicInvocationUnit
{
private boolean storeFieldValues;
private boolean storeMethodParameterValues;
private boolean storeMethodReturnValues;
/**
* Creates a new StoringInvocationUnit with the given value factory.
*/
public StoringInvocationUnit(ValueFactory valueFactory)
{
this(valueFactory, true, true, true);
}
/**
* Creates a new StoringInvocationUnit with the given value factory, for
* storing the specified values.
*/
public StoringInvocationUnit(ValueFactory valueFactory,
boolean storeFieldValues,
boolean storeMethodParameterValues,
boolean storeMethodReturnValues)
{
super(valueFactory);
this.storeFieldValues = storeFieldValues;
this.storeMethodParameterValues = storeMethodParameterValues;
this.storeMethodReturnValues = storeMethodReturnValues;
}
// Implementations for BasicInvocationUnit.
protected void setFieldClassValue(Clazz clazz,
RefConstant refConstant,
ReferenceValue value)
{
if (storeFieldValues)
{
Member referencedMember = refConstant.referencedMember;
if (referencedMember != null)
{
generalizeFieldClassValue((Field)referencedMember, value);
}
}
}
protected void setFieldValue(Clazz clazz,
RefConstant refConstant,
Value value)
{
if (storeFieldValues)
{
Member referencedMember = refConstant.referencedMember;
if (referencedMember != null)
{
generalizeFieldValue((Field)referencedMember, value);
}
}
}
protected void setMethodParameterValue(Clazz clazz,
RefConstant refConstant,
int parameterIndex,
Value value)
{
if (storeMethodParameterValues)
{
Member referencedMember = refConstant.referencedMember;
if (referencedMember != null)
{
generalizeMethodParameterValue((Method)referencedMember,
parameterIndex,
value);
}
}
}
protected void setMethodReturnValue(Clazz clazz,
Method method,
Value value)
{
if (storeMethodReturnValues)
{
generalizeMethodReturnValue(method, value);
}
}
// Small utility methods.
private static void generalizeFieldClassValue(Field field, ReferenceValue value)
{
FieldOptimizationInfo info = FieldOptimizationInfo.getFieldOptimizationInfo(field);
if (info != null)
{
info.generalizeReferencedClass(value);
}
}
public static ReferenceValue getFieldClassValue(Field field)
{
FieldOptimizationInfo info = FieldOptimizationInfo.getFieldOptimizationInfo(field);
return info != null ?
info.getReferencedClass() :
null;
}
private static void generalizeFieldValue(Field field, Value value)
{
FieldOptimizationInfo info = FieldOptimizationInfo.getFieldOptimizationInfo(field);
if (info != null)
{
info.generalizeValue(value);
}
}
public static Value getFieldValue(Field field)
{
FieldOptimizationInfo info = FieldOptimizationInfo.getFieldOptimizationInfo(field);
return info != null ?
info.getValue() :
null;
}
private static void generalizeMethodParameterValue(Method method, int parameterIndex, Value value)
{
MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method);
if (info != null)
{
info.generalizeParameter(parameterIndex, value);
}
}
public static Value getMethodParameterValue(Method method, int parameterIndex)
{
MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method);
return info != null ?
info.getParameter(parameterIndex) :
null;
}
private static void generalizeMethodReturnValue(Method method, Value value)
{
MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method);
if (info != null)
{
info.generalizeReturnValue(value);
}
}
public static Value getMethodReturnValue(Method method)
{
MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method);
return info != null ?
info.getReturnValue() :
null;
}
}
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