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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.evaluation;
import proguard.classfile.*;
import proguard.classfile.constant.*;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.evaluation.value.*;
/**
* This class creates Value instance that correspond to specified constant pool
* entries.
*
* @author Eric Lafortune
*/
public class ConstantValueFactory
extends SimplifiedVisitor
implements ConstantVisitor
{
protected final ValueFactory valueFactory;
// Field acting as a parameter for the ConstantVisitor methods.
protected Value value;
public ConstantValueFactory(ValueFactory valueFactory)
{
this.valueFactory = valueFactory;
}
/**
* Returns the Value of the constant pool element at the given index.
*/
public Value constantValue(Clazz clazz,
int constantIndex)
{
// Visit the constant pool entry to get its return value.
clazz.constantPoolEntryAccept(constantIndex, this);
return value;
}
// Implementations for ConstantVisitor.
public void visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant)
{
value = valueFactory.createIntegerValue(integerConstant.getValue());
}
public void visitLongConstant(Clazz clazz, LongConstant longConstant)
{
value = valueFactory.createLongValue(longConstant.getValue());
}
public void visitFloatConstant(Clazz clazz, FloatConstant floatConstant)
{
value = valueFactory.createFloatValue(floatConstant.getValue());
}
public void visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant)
{
value = valueFactory.createDoubleValue(doubleConstant.getValue());
}
public void visitStringConstant(Clazz clazz, StringConstant stringConstant)
{
value = valueFactory.createReferenceValue(ClassConstants.NAME_JAVA_LANG_STRING,
stringConstant.javaLangStringClass,
false);
}
public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant)
{
value = valueFactory.createReferenceValue(ClassConstants.NAME_JAVA_LANG_INVOKE_METHOD_HANDLE,
methodHandleConstant.javaLangInvokeMethodHandleClass,
false);
}
public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
{
value = valueFactory.createReferenceValue(classConstant.getName(clazz),
classConstant.referencedClass,
false);
}
public void visitMethodTypeConstant(Clazz clazz, MethodTypeConstant methodTypeConstant)
{
value = valueFactory.createReferenceValue(ClassConstants.NAME_JAVA_LANG_INVOKE_METHOD_TYPE,
methodTypeConstant.javaLangInvokeMethodTypeClass,
false);
}
}
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