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/*
* SonarQube Java
* Copyright (C) 2012 SonarSource
* [email protected]
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.java.bytecode.asm;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.sonar.java.bytecode.asm.AsmClassProvider.DETAIL_LEVEL;
public class AsmClassVisitor extends ClassVisitor {
private final AsmClassProvider asmClassProvider;
private final DETAIL_LEVEL level;
private final AsmClass asmClass;
public AsmClassVisitor(AsmClassProvider asmClassProvider, AsmClass asmClass, DETAIL_LEVEL level) {
super(Opcodes.ASM5);
this.asmClassProvider = asmClassProvider;
this.level = level;
this.asmClass = asmClass;
}
@Override
public void visit(int version, int accessFlags, String internalName, String signature, String superClass, String[] interfaces) {
if (asmClass.getDetailLevel() == DETAIL_LEVEL.NOTHING) {
asmClass.setAccessFlags(accessFlags);
if (asmClass.isInterface()) {
if (interfaces.length == 1) {
asmClass.setSuperClass(asmClassProvider.getClass(interfaces[0], DETAIL_LEVEL.STRUCTURE));
}
} else {
if (superClass != null) {
asmClass.setSuperClass(asmClassProvider.getClass(superClass, DETAIL_LEVEL.STRUCTURE));
}
for (String interfaceName : interfaces) {
asmClass.addInterface(asmClassProvider.getClass(interfaceName, DETAIL_LEVEL.STRUCTURE));
}
}
if (signature != null) {
String[] internalNames = AsmSignature.extractInternalNames(signature);
AsmClass[] asmClasses = internalNamesToAsmClasses(internalNames, DETAIL_LEVEL.NOTHING);
asmClass.addUsesOfClasses(asmClasses);
}
}
asmClass.setDetailLevel(level);
}
@Override
public FieldVisitor visitField(int access, String fieldName, String description, String signature, Object value) {
AsmField field = asmClass.getFieldOrCreateIt(fieldName);
field.setAccessFlags(access);
String[] internalNames = AsmSignature.extractInternalNames(description, signature);
AsmClass[] asmClasses = internalNamesToAsmClasses(internalNames, DETAIL_LEVEL.NOTHING);
field.addUsesOfClasses(asmClasses);
return null;
}
@Override
public MethodVisitor visitMethod(int access, String methodName, String description, String signature, String[] exceptions) {
AsmMethod method = asmClass.getMethodOrCreateIt(methodName + description);
if (isInheritedMethodSignature(method.getParent(), method.getKey())) {
method.setInherited(true);
}
method.setSignature(signature);
method.setBodyLoaded(true);
method.setAccessFlags(access);
method.clearOutogingEdges();
String[] internalNames = AsmSignature.extractInternalNames(description, signature);
AsmClass[] asmClasses = internalNamesToAsmClasses(internalNames, DETAIL_LEVEL.NOTHING);
method.addUsesOfClasses(asmClasses);
AsmClass[] asmExceptionClasses = internalNamesToAsmClasses(exceptions, DETAIL_LEVEL.STRUCTURE);
method.addUsesOfClasses(asmExceptionClasses);
method.addThrowsOfClasses(asmExceptionClasses);
if (level == DETAIL_LEVEL.STRUCTURE_AND_CALLS) {
return new AsmMethodVisitor(method, asmClassProvider);
}
return null;
}
private AsmClass[] internalNamesToAsmClasses(String[] internalNames, DETAIL_LEVEL level) {
if (internalNames == null) {
return new AsmClass[0];
}
AsmClass[] asmClasses = new AsmClass[internalNames.length];
for (int i = 0; i < internalNames.length; i++) {
asmClasses[i] = asmClassProvider.getClass(internalNames[i], level);
}
return asmClasses;
}
private static boolean isInheritedMethodSignature(AsmClass parent, String key) {
if (parent.getSuperClass() != null
&& (parent.getSuperClass().getMethod(key) != null || isInheritedMethodSignature(parent.getSuperClass(), key))) {
return true;
}
for (AsmClass interfaceClass : parent.getInterfaces()) {
if (interfaceClass.getMethod(key) != null || isInheritedMethodSignature(interfaceClass, key)) {
return true;
}
}
return false;
}
}
