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package com.sun.faces.facelets.util;
import com.sun.faces.config.ConfigurationException;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.config.WebConfiguration.WebContextInitParameter;
import com.sun.faces.util.ReflectionUtils;
import com.sun.faces.util.Util;
import javax.faces.view.facelets.ResourceResolver;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.text.MessageFormat;
import java.util.Arrays;
public class ReflectionUtil {
private static final String[] PRIMITIVE_NAMES = new String[] { "boolean",
"byte", "char", "double", "float", "int", "long", "short", "void" };
private static final Class[] PRIMITIVES = new Class[] { boolean.class,
byte.class, char.class, double.class, float.class, int.class,
long.class, short.class, Void.TYPE };
/**
*
*/
private ReflectionUtil() {
super();
}
public static Class forName(String name) throws ClassNotFoundException {
if (null == name || "".equals(name)) {
return null;
}
Class c = forNamePrimitive(name);
if (c == null) {
if (name.endsWith("[]")) {
String nc = name.substring(0, name.length() - 2);
c = Class.forName(nc, false, Thread.currentThread().getContextClassLoader());
c = Array.newInstance(c, 0).getClass();
} else {
c = Class.forName(name, false, Thread.currentThread().getContextClassLoader());
}
}
return c;
}
protected static Class forNamePrimitive(String name) {
if (name.length() <= 8) {
int p = Arrays.binarySearch(PRIMITIVE_NAMES, name);
if (p >= 0) {
return PRIMITIVES[p];
}
}
return null;
}
/**
* Converts an array of Class names to Class types
* @param s
* @return
* @throws ClassNotFoundException
*/
public static Class[] toTypeArray(String[] s) throws ClassNotFoundException {
if (s == null)
return null;
Class[] c = new Class[s.length];
for (int i = 0; i < s.length; i++) {
c[i] = forName(s[i]);
}
return c;
}
/**
* Converts an array of Class types to Class names
* @param c
* @return
*/
public static String[] toTypeNameArray(Class[] c) {
if (c == null)
return null;
String[] s = new String[c.length];
for (int i = 0; i < c.length; i++) {
s[i] = c[i].getName();
}
return s;
}
/*
* Get a public method form a public class or interface of a given method.
* Note that if the base is an instance of a non-public class that
* implements a public interface, calling Class.getMethod() with the base
* will not find the method. To correct this, a version of the
* same method must be found in a superclass or interface.
**/
static private Method getMethod(Class cl, String methodName,
Class[] paramTypes) {
Method m = null;
try {
m = cl.getMethod(methodName, paramTypes);
} catch (NoSuchMethodException ex) {
return null;
}
Class dclass = m.getDeclaringClass();
if (Modifier.isPublic(dclass.getModifiers())) {
return m;
}
Class[] intf = dclass.getInterfaces();
for (int i = 0; i < intf.length; i++) {
m = getMethod(intf[i], methodName, paramTypes);
if (m != null) {
return m;
}
}
Class c = dclass.getSuperclass();
if (c != null) {
m = getMethod(c, methodName, paramTypes);
if (m != null) {
return m;
}
}
return null;
}
protected static final String paramString(Class[] types) {
if (types != null) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < types.length; i++) {
sb.append(types[i].getName()).append(", ");
}
if (sb.length() > 2) {
sb.setLength(sb.length() - 2);
}
return sb.toString();
}
return null;
}
public static Object decorateInstance(Class clazz,
Class rootType,
Object root) {
Object returnObject = null;
try {
if (isDevModeEnabled()) {
Class[] interfaces = clazz.getInterfaces();
if (interfaces != null) {
for (Class c : interfaces) {
if ("groovy.lang.GroovyObject"
.equals(c.getName())) {
// all groovy classes will implement this interface
returnObject =
createScriptProxy(rootType, clazz.getName(), root);
break;
}
}
}
}
if (returnObject == null) {
// Look for an adapter constructor if we've got
// an object to adapt
if ((rootType != null) && (root != null)) {
Constructor construct =
ReflectionUtils.lookupConstructor(
clazz,
rootType);
if (construct != null) {
returnObject = construct.newInstance(root);
}
}
}
if (clazz != null && returnObject == null) {
returnObject = clazz.newInstance();
}
}
catch (Exception e) {
throw new ConfigurationException(
buildMessage(MessageFormat.format("Unable to create a new instance of ''{0}'': {1}",
clazz.getName(),
e.toString())), e);
}
return returnObject;
}
public static Object decorateInstance(String className,
Class rootType,
Object root) {
Class clazz;
Object returnObject = null;
if (className != null) {
try {
clazz = loadClass(className, returnObject, null);
if (clazz != null) {
returnObject = decorateInstance(clazz, rootType, root);
}
} catch (ClassNotFoundException cnfe) {
throw new ConfigurationException(
buildMessage(MessageFormat.format("Unable to find class ''{0}''",
className)));
} catch (NoClassDefFoundError ncdfe) {
throw new ConfigurationException(
buildMessage(MessageFormat.format("Class ''{0}'' is missing a runtime dependency: {1}",
className,
ncdfe.toString())));
} catch (ClassCastException cce) {
throw new ConfigurationException(
buildMessage(MessageFormat.format("Class ''{0}'' is not an instance of ''{1}''",
className,
rootType)));
} catch (Exception e) {
throw new ConfigurationException(
buildMessage(MessageFormat.format("Unable to create a new instance of ''{0}'': {1}",
className,
e.toString())), e);
}
}
return returnObject;
}
// --------------------------------------------------------- Private Methods
private static String buildMessage(String cause) {
return MessageFormat.format("\n Source Document: {0}\n Cause: {1}",
"web.xml",
cause);
}
private static Class loadClass(String className,
Object fallback,
Class expectedType)
throws ClassNotFoundException {
Class clazz = Util.loadClass(className, fallback);
if (expectedType != null && !expectedType.isAssignableFrom(clazz)) {
throw new ClassCastException();
}
return clazz;
}
private static boolean isDevModeEnabled() {
WebConfiguration webconfig = WebConfiguration.getInstance();
return (webconfig != null
&& "Development".equals(webconfig.getOptionValue(WebContextInitParameter.JavaxFacesProjectStage)));
}
private static Object createScriptProxy(Class artifactType,
String scriptName,
Object root) {
if (ResourceResolver.class.equals(artifactType)) {
return new ResourceResolverProxy(scriptName, (ResourceResolver) root);
}
return null;
}
}
