static {
getExtendsClause = getMethod(JCClassDecl.class, "getExtendsClause", new Class<?>[0]);
getExtendsClause.setAccessible(true);
if (getJavaCompilerVersion() < 8) {
getEndPosition = getMethod(DiagnosticPosition.class, "getEndPosition", java.util.Map.class);
storeEnd = getMethod(java.util.Map.class, "put", Object.class, Object.class);
} else {
getEndPosition =
getMethod(
DiagnosticPosition.class, "getEndPosition", "com.sun.tools.javac.tree.EndPosTable");
Method storeEndMethodTemp;
Class<?> endPosTable;
try {
endPosTable = Class.forName("com.sun.tools.javac.tree.EndPosTable");
} catch (ClassNotFoundException ex) {
throw sneakyThrow(ex);
}
try {
storeEndMethodTemp = endPosTable.getMethod("storeEnd", JCTree.class, int.class);
} catch (NoSuchMethodException e) {
try {
endPosTable = Class.forName("com.sun.tools.javac.parser.JavacParser$AbstractEndPosTable");
storeEndMethodTemp = endPosTable.getDeclaredMethod("storeEnd", JCTree.class, int.class);
} catch (NoSuchMethodException ex) {
throw sneakyThrow(ex);
} catch (ClassNotFoundException ex) {
throw sneakyThrow(ex);
}
}
storeEnd = storeEndMethodTemp;
}
getEndPosition.setAccessible(true);
storeEnd.setAccessible(true);
}
private static Method getMethod(Class<?> clazz, String name, String... paramTypes) {
try {
Class<?>[] c = new Class[paramTypes.length];
for (int i = 0; i < paramTypes.length; i++) c[i] = Class.forName(paramTypes[i]);
return clazz.getMethod(name, c);
} catch (NoSuchMethodException e) {
throw sneakyThrow(e);
} catch (ClassNotFoundException e) {
throw sneakyThrow(e);
}
}
private static Method getMethod(Class<?> clazz, String name, Class<?>... paramTypes) {
try {
return clazz.getMethod(name, paramTypes);
} catch (NoSuchMethodException e) {
throw sneakyThrow(e);
}
}
@SuppressWarnings("unchecked")
private <T> T readObject(JCTree tree, String fieldName, T defaultValue) {
Class<?> tClass = tree.getClass();
Map<String, Field> c = reflectionCache.get(tClass);
if (c == null) reflectionCache.put(tClass, c = new HashMap<String, Field>());
Field f = c.get(fieldName);
if (f == null) {
try {
f = tClass.getDeclaredField(fieldName);
} catch (Exception e) {
return defaultValue;
}
f.setAccessible(true);
c.put(fieldName, f);
}
try {
return (T) f.get(tree);
} catch (Exception e) {
return defaultValue;
}
}