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/*******************************************************************************
* Copyright (c) 2015 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public
* License v3.0 which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/lgpl.html
* <p>
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.bytecode;
import java.util.ArrayList;
import java.util.List;
import cuchaz.enigma.mapping.*;
import javassist.CtBehavior;
import javassist.CtClass;
import javassist.bytecode.CodeAttribute;
import javassist.bytecode.LocalVariableAttribute;
public class MethodParameterWriter {
private Translator translator;
public MethodParameterWriter(Translator translator) {
this.translator = translator;
}
public void writeMethodArguments(CtClass c) {
// Procyon will read method arguments from the "MethodParameters" attribute, so write those
for (CtBehavior behavior : c.getDeclaredBehaviors()) {
// if there's a local variable table here, don't write a MethodParameters attribute
// let the local variable writer deal with it instead
// procyon starts doing really weird things if we give it both attributes
CodeAttribute codeAttribute = behavior.getMethodInfo().getCodeAttribute();
if (codeAttribute != null && codeAttribute.getAttribute(LocalVariableAttribute.tag) != null) {
continue;
}
BehaviorEntry behaviorEntry = EntryFactory.getBehaviorEntry(behavior);
// get the number of arguments
Signature signature = behaviorEntry.getSignature();
if (signature == null) {
// static initializers have no signatures, or arguments
continue;
}
int numParams = signature.getArgumentTypes().size();
if (numParams <= 0) {
continue;
}
// get the list of argument names
List<String> names = new ArrayList<>(numParams);
for (int i = 0; i < numParams; i++) {
names.add(this.translator.translate(new ArgumentEntry(behaviorEntry, i, "")));
}
// save the mappings to the class
MethodParametersAttribute.updateClass(behavior.getMethodInfo(), names);
}
}
}
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