Reflection - Beginning Java 8 Language Features - page 88

public class ExecutableUtil {
public static ArrayList<String> getParameters(Executable exec) {
Parameter[] parms = exec.getParameters();
ArrayList<String> parmList = new ArrayList<>();
for (int i = 0; i < parms.length; i++) {
// Get modifiers, type, and name of teh parameter
int mod = parms[i].getModifiers() & Modifier.parameterModifiers();
String modifiers = Modifier.toString(mod);
String parmType = parms[i].getType().getSimpleName();
String parmName = parms[i].getName();
String temp = modifiers + " " + parmType + " " + parmName;
// Trim it as it may have leading spaces when modifiers are absent
parmList.add(temp.trim());
}
return parmList;
}
public static ArrayList<String> getExceptionList(Executable exec) {
ArrayList<String> exceptionList = new ArrayList<>();
for (Class<?> c : exec.getExceptionTypes()) {
exceptionList.add(c.getSimpleName());
}
return exceptionList;
}
public static String getThrowsClause(Executable exec) {
ArrayList<String> exceptionList = getExceptionList(exec);
String exceptions = ExecutableUtil.arrayListToString(exceptionList, ",");
String throwsClause = "";
if (exceptionList.size() > 0) {
throwsClause = "throws " + exceptions;
}
return throwsClause;
}
public static String getModifiers(Executable exec) {
// Get the modifiers for the class
int mod = exec.getModifiers();
if (exec instanceof Method) {
mod = mod & Modifier.methodModifiers();
}
else if (exec instanceof Constructor) {
mod = mod & Modifier.constructorModifiers();
}
return Modifier.toString(mod);
}