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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.classfile.editor;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.BootstrapMethodInfoVisitor;
/**
* This BootstrapMethodInfoVisitor adds all bootstrap methods that it visits to
* the given target class, creating a bootstrap methods attribute if necessary.
*/
public class BootstrapMethodsAttributeAdder
implements BootstrapMethodInfoVisitor
{
private final ProgramClass targetClass;
private final ConstantPoolEditor constantPoolEditor;
private BootstrapMethodInfoAdder bootstrapMethodInfoAdder;
/**
* Creates a new BootstrapMethodsAttributeAdder that will copy bootstrap
* methods into the given target class/
*/
public BootstrapMethodsAttributeAdder(ProgramClass targetClass)
{
this.targetClass = targetClass;
this.constantPoolEditor = new ConstantPoolEditor(targetClass);
}
/**
* Returns the index of the most recently added bootstrap method.
*/
public int getBootstrapMethodIndex()
{
return bootstrapMethodInfoAdder.getBootstrapMethodIndex();
}
// Implementations for BootstrapMethodInfoVisitor.
public void visitBootstrapMethodInfo(Clazz clazz, BootstrapMethodInfo bootstrapMethodInfo)
{
// Make sure we have a bootstrap methods attribute adder.
if (bootstrapMethodInfoAdder == null)
{
// Make sure we have a target bootstrap methods attribute.
AttributesEditor attributesEditor =
new AttributesEditor(targetClass, false);
BootstrapMethodsAttribute targetBootstrapMethodsAttribute =
(BootstrapMethodsAttribute)attributesEditor.findAttribute(ClassConstants.ATTR_BootstrapMethods);
if (targetBootstrapMethodsAttribute == null)
{
targetBootstrapMethodsAttribute =
new BootstrapMethodsAttribute(constantPoolEditor.addUtf8Constant(ClassConstants.ATTR_BootstrapMethods),
0,
new BootstrapMethodInfo[0]);
attributesEditor.addAttribute(targetBootstrapMethodsAttribute);
}
// Create a bootstrap method adder for it.
bootstrapMethodInfoAdder = new BootstrapMethodInfoAdder(targetClass,
targetBootstrapMethodsAttribute);
}
// Delegate to the bootstrap method adder.
bootstrapMethodInfoAdder.visitBootstrapMethodInfo(clazz, bootstrapMethodInfo);
}
}
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