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/*
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*
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* Copyright 2004 The Apache Software Foundation
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
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package org.glassfish.extras.grizzly;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.grizzly.Grizzly;
/**
* Utils for introspection and reflection
*/
public final class IntrospectionUtils {
private static final Logger LOGGER = Grizzly.logger(IntrospectionUtils.class);
/**
* Find a method with the right name If found, call the method ( if param is
* int or boolean we'll convert value to the right type before) - that means
* you can have setDebug(1).
*/
public static boolean setProperty(Object o, String name, String value) {
if (dbg > 1) {
d("setProperty(" + o.getClass() + " " + name + "=" + value + ")");
}
String setter = "set" + capitalize(name);
try {
Method methods[] = findMethods(o.getClass());
Method setPropertyMethodVoid = null;
Method setPropertyMethodBool = null;
// First, the ideal case - a setFoo( String ) method
for (int i = 0; i < methods.length; i++) {
Class paramT[] = methods[i].getParameterTypes();
if (setter.equals(methods[i].getName()) && paramT.length == 1
&& "java.lang.String".equals(paramT[0].getName())) {
methods[i].invoke(o, value);
return true;
}
}
// Try a setFoo ( int ) or ( boolean )
for (int i = 0; i < methods.length; i++) {
boolean ok = true;
if (setter.equals(methods[i].getName())
&& methods[i].getParameterTypes().length == 1) {
// match - find the type and invoke it
Class paramType = methods[i].getParameterTypes()[0];
Object params[] = new Object[1];
// Try a setFoo ( int )
if ("java.lang.Integer".equals(paramType.getName())
|| "int".equals(paramType.getName())) {
try {
params[0] = new Integer(value);
} catch (NumberFormatException ex) {
ok = false;
}
// Try a setFoo ( long )
} else if ("java.lang.Long".equals(paramType.getName())
|| "long".equals(paramType.getName())) {
try {
params[0] = new Long(value);
} catch (NumberFormatException ex) {
ok = false;
}
// Try a setFoo ( boolean )
} else if ("java.lang.Boolean".equals(paramType.getName())
|| "boolean".equals(paramType.getName())) {
params[0] = Boolean.valueOf(value);
// Try a setFoo ( InetAddress )
} else if ("java.net.InetAddress".equals(paramType.getName())) {
try {
params[0] = InetAddress.getByName(value);
} catch (UnknownHostException exc) {
d("Unable to resolve host name:" + value);
ok = false;
}
// Unknown type
} else {
d("Unknown type " + paramType.getName());
}
if (ok) {
methods[i].invoke(o, params);
return true;
}
}
// save "setProperty" for later
if ("setProperty".equals(methods[i].getName())) {
if (methods[i].getReturnType() == Boolean.TYPE) {
setPropertyMethodBool = methods[i];
} else {
setPropertyMethodVoid = methods[i];
}
}
}
// Ok, no setXXX found, try a setProperty("name", "value")
if (setPropertyMethodBool != null || setPropertyMethodVoid != null) {
Object params[] = new Object[2];
params[0] = name;
params[1] = value;
if (setPropertyMethodBool != null) {
try {
return (Boolean) setPropertyMethodBool.invoke(o, params);
} catch (IllegalArgumentException biae) {
//the boolean method had the wrong
//parameter types. lets try the other
if (setPropertyMethodVoid != null) {
setPropertyMethodVoid.invoke(o, params);
return true;
} else {
throw biae;
}
}
} else {
setPropertyMethodVoid.invoke(o, params);
return true;
}
}
} catch (IllegalArgumentException ex2) {
LOGGER.log(Level.INFO, "IAE " + o + " " + name + " " + value, ex2);
} catch (SecurityException ex1) {
if (dbg > 0) {
d("SecurityException for " + o.getClass() + " " + name + "="
+ value + ")");
}
if (dbg > 1) {
LOGGER.log(Level.WARNING, "", ex1);
}
} catch (IllegalAccessException iae) {
if (dbg > 0) {
d("IllegalAccessException for " + o.getClass() + " " + name
+ "=" + value + ")");
}
if (dbg > 1) {
LOGGER.log(Level.WARNING, "", iae);
}
} catch (InvocationTargetException ie) {
if (dbg > 0) {
d("InvocationTargetException for " + o.getClass() + " " + name
+ "=" + value + ")");
}
if (dbg > 1) {
LOGGER.log(Level.WARNING, "", ie);
}
}
return false;
}
/**
* Reverse of Introspector.decapitalize
*/
public static String capitalize(String name) {
if (name == null || name.length() == 0) {
return name;
}
char chars[] = name.toCharArray();
chars[0] = Character.toUpperCase(chars[0]);
return new String(chars);
}
// -------------------- other utils --------------------
@SuppressWarnings("UnusedDeclaration")
public static void clear() {
objectMethods.clear();
}
static Map, Method[]> objectMethods =
new HashMap, Method[]>();
@SuppressWarnings("unchecked")
public static Method[] findMethods(Class c) {
Method methods[] = objectMethods.get(c);
if (methods != null) {
return methods;
}
methods = c.getMethods();
objectMethods.put(c, methods);
return methods;
}
// debug --------------------
static final int dbg = 0;
static void d(String s) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "IntrospectionUtils: {0}", s);
}
}
}