public static void patch(CtClass c, IPatcher patcher) throws Exception {
treatClassToPatch(c);
if (patcher != null) {
patcher.initClass(c);
}
for (CtMethod m : c.getDeclaredMethods()) {
boolean wasAbstract = false;
String newBody = null;
if (Modifier.isAbstract(m.getModifiers())) {
m.setModifiers(m.getModifiers() - Modifier.ABSTRACT);
wasAbstract = true;
}
if (patcher != null) {
newBody = patcher.getNewBody(m);
}
if (newBody != null) {
if (newBody.startsWith(AutomaticPatcher.INSERT_BEFORE)) {
GwtPatcherUtils.insertBefore(
m, newBody.substring(AutomaticPatcher.INSERT_BEFORE.length()));
} else if (newBody.startsWith(AutomaticPatcher.INSERT_AFTER)) {
GwtPatcherUtils.insertAfter(m, newBody.substring(AutomaticPatcher.INSERT_AFTER.length()));
} else {
GwtPatcherUtils.replaceImplementation(m, newBody);
}
} else if (wasAbstract) {
if (patcher != null) {
m.setBody(
"{ throw new "
+ UnsupportedOperationException.class.getName()
+ "(\"Abstract method '"
+ c.getSimpleName()
+ "."
+ m.getName()
+ "()' is not patched by "
+ patcher.getClass().getName()
+ "\"); }");
} else {
m.setBody(
"{ throw new "
+ UnsupportedOperationException.class.getName()
+ "(\"Abstract method '"
+ c.getSimpleName()
+ "."
+ m.getName()
+ "()' is not patched by any declared "
+ IPatcher.class.getSimpleName()
+ " instance\"); }");
}
}
}
if (patcher != null) {
patcher.finalizeClass(c);
}
}
// this GwtCreateHandler has been introduced to make possible the
// instanciation of abstract classes
// that gwt-test-utils doesn't patch right now
public Object create(Class<?> classLiteral) throws Exception {
if (classLiteral.isAnnotation()
|| classLiteral.isArray()
|| classLiteral.isEnum()
|| classLiteral.isInterface()
|| !Modifier.isAbstract(classLiteral.getModifiers())) {
return null;
}
Class<?> newClass = cache.get(classLiteral);
if (newClass != null) {
return newClass.newInstance();
}
CtClass ctClass = GwtClassPool.getCtClass(classLiteral);
CtClass subClass = GwtClassPool.get().makeClass(classLiteral.getCanonicalName() + "SubClass");
subClass.setSuperclass(ctClass);
for (CtMethod m : ctClass.getDeclaredMethods()) {
if (javassist.Modifier.isAbstract(m.getModifiers())) {
CtMethod copy = new CtMethod(m, subClass, null);
subClass.addMethod(copy);
}
}
GwtPatcherUtils.patch(subClass, null);
newClass = subClass.toClass(GwtClassLoader.get(), null);
cache.put(classLiteral, newClass);
return newClass.newInstance();
}