public static LocalVariableAnnotation getLocalVariableAnnotation(
Method method, int local, int position1, int position2) {
LocalVariableTable localVariableTable = method.getLocalVariableTable();
String localName = "?";
if (localVariableTable != null) {
LocalVariable lv1 = localVariableTable.getLocalVariable(local, position1);
if (lv1 == null) {
lv1 = localVariableTable.getLocalVariable(local, position2);
position1 = position2;
}
if (lv1 != null) localName = lv1.getName();
else
for (LocalVariable lv : localVariableTable.getLocalVariableTable()) {
if (lv.getIndex() == local) {
if (!localName.equals("?") && !localName.equals(lv.getName())) {
// not a single consistent name
localName = "?";
break;
}
localName = lv.getName();
}
}
}
LineNumberTable lineNumbers = method.getLineNumberTable();
if (lineNumbers == null) return new LocalVariableAnnotation(localName, local, position1);
int line = lineNumbers.getSourceLine(position1);
return new LocalVariableAnnotation(localName, local, position1, line);
}
/**
* looks for methods that have it's parameters all follow the form arg0, arg1, arg2, or parm0,
* parm1, parm2 etc, where the method actually has code in it
*
* @param cls the class to check
*/
private void checkIDEGeneratedParmNames(JavaClass cls) {
methods:
for (Method m : cls.getMethods()) {
if (!m.isPublic()) {
continue;
}
String name = m.getName();
if (Values.CONSTRUCTOR.equals(name) || Values.STATIC_INITIALIZER.equals(name)) {
continue;
}
LocalVariableTable lvt = m.getLocalVariableTable();
if (lvt == null) {
continue;
}
if (m.getCode().getCode().length <= MAX_EMPTY_METHOD_SIZE) {
continue;
}
int numArgs = m.getArgumentTypes().length;
if (numArgs == 0) {
continue;
}
int offset = m.isStatic() ? 0 : 1;
for (int i = 0; i < numArgs; i++) {
LocalVariable lv = lvt.getLocalVariable(offset + i, 0);
if ((lv == null) || (lv.getName() == null)) {
continue methods;
}
Matcher ma = ARG_PATTERN.matcher(lv.getName());
if (!ma.matches()) {
continue methods;
}
}
bugReporter.reportBug(
new BugInstance(
this,
BugType.IMC_IMMATURE_CLASS_IDE_GENERATED_PARAMETER_NAMES.name(),
NORMAL_PRIORITY)
.addClass(cls)
.addMethod(cls, m));
return;
}
}
/**
* Loads the names of the local variables.
*
* <p>NOTE: BCEL only gives us a list of all *named* locals, which might not include all local
* vars (temporaries, like StringBuilder). Note that we have to fill this with "?" in order to
* make the returned array correspond with slot numbers
*/
protected String[] loadLocalVariableNames(Method m) {
Code c = m.getCode();
if (c == null) {
return null;
}
LocalVariableTable lvt = c.getLocalVariableTable();
if (lvt == null) {
if (!warnedLocalInfo && !ci.isSystemClass()) {
Debug.println(Debug.WARNING);
Debug.println(Debug.WARNING, "No local variable information available");
Debug.println(Debug.WARNING, "for " + getCompleteName());
Debug.println(Debug.WARNING, "Recompile with -g to include this information");
Debug.println(Debug.WARNING);
warnedLocalInfo = true;
}
return null;
}
LocalVariable[] lv = lvt.getLocalVariableTable();
int length = lv.length;
String[] v = new String[c.getMaxLocals()];
for (int i = 0; i < length; i++) {
v[lv[i].getIndex()] = lv[i].getName();
}
for (int i = 0; i < v.length; i++) {
if (v[i] == null) {
v[i] = "?";
}
}
return v;
}