/**
* Clones the specified object. Use clone() if Cloeable. Otherwise, try to serialize/deserialize
* it by use of MarshalledObject.
*
* <p>If o is null, null is returned.
*
* @exception SystemException if failed to clone
*/
public static final Object clone(Object o) {
if (o == null) return o;
try {
final Class<?> kls = o.getClass();
if (kls.isArray()) return ArraysX.clone(o);
if (o instanceof Cloneable) {
try {
return kls.getMethod("clone").invoke(o);
} catch (NoSuchMethodException ex) {
if (log.debugable()) log.debug("No clone() for " + kls);
}
}
// :TODO: MarshalledObject is said with very bad performance, change it
// if exists other good deep clone method.
return new MarshalledObject<Object>(o).get();
} catch (Exception ex) {
throw SystemException.Aide.wrap(ex);
}
}
// -- private utilities --//
private final Map loadLabels(Locale locale) {
WaitLock lock = null;
for (; ; ) {
final Object o;
synchronized (_syncLabels) {
o = _syncLabels.get(locale);
if (o == null) _syncLabels.put(locale, lock = new WaitLock()); // lock it
}
if (o instanceof Map) return (Map) o;
if (o == null) break; // go to load the page
// wait because some one is creating the servlet
if (!((WaitLock) o).waitUntilUnlock(5 * 60 * 1000))
log.warning(
"Take too long to wait loading labels: "
+ locale
+ "\nTry to load again automatically...");
} // for(;;)
if (_jarcharset == null)
_jarcharset = Library.getProperty("org.zkoss.util.label.classpath.charset", "UTF-8");
if (_warcharset == null) {
_warcharset = Library.getProperty("org.zkoss.util.label.web.charset", null);
if (_warcharset == null)
_warcharset =
Library.getProperty(
"org.zkoss.util.label.WEB-INF.charset", "UTF-8"); // backward compatible
}
try {
// get the class name
if (locale != null) log.info("Loading labels for " + locale);
Map labels = new HashMap(512);
// 1. load from modules
final ClassLocator locator = new ClassLocator();
for (Enumeration en =
locator.getResources(
locale == null
? "metainfo/i3-label.properties"
: "metainfo/i3-label_" + locale + ".properties");
en.hasMoreElements(); ) {
final URL url = (URL) en.nextElement();
load(labels, url, _jarcharset);
}
// 2. load from extra resource
final List locators;
synchronized (_locators) {
locators = new LinkedList(_locators);
}
for (Iterator it = locators.iterator(); it.hasNext(); ) {
Object o = it.next();
if (o instanceof LabelLocator) {
final URL url = ((LabelLocator) o).locate(locale);
if (url != null) load(labels, url, _warcharset);
} else {
final LabelLocator2 loc = (LabelLocator2) o;
final InputStream is = loc.locate(locale);
if (is != null) {
final String cs = loc.getCharset();
load(labels, is, cs != null ? cs : _warcharset);
}
}
}
// Convert values to ExValue
toExValue(labels);
// merge with labels from 'super' locale
if (locale != null) {
final String lang = locale.getLanguage();
final String cnty = locale.getCountry();
final String var = locale.getVariant();
final Map superlabels =
loadLabels(
var != null && var.length() > 0
? new Locale(lang, cnty)
: cnty != null && cnty.length() > 0 ? new Locale(lang, "") : null);
if (labels.isEmpty()) {
labels = superlabels.isEmpty() ? Collections.EMPTY_MAP : superlabels;
} else if (!superlabels.isEmpty()) {
Map combined = new HashMap(superlabels);
combined.putAll(labels);
labels = combined;
}
}
// add to map
synchronized (_syncLabels) {
_syncLabels.put(locale, labels);
cloneLables();
}
return labels;
} catch (Throwable ex) {
synchronized (_syncLabels) {
_syncLabels.remove(locale);
cloneLables();
}
throw SystemException.Aide.wrap(ex);
} finally {
lock.unlock(); // unlock (always unlock to avoid deadlock)
}
}
/**
* Loads, parses and returns the resource of the specified URI, or null if not found. The parser
* is defined by the loader defined in {@link ResourceCache}.
*
* @param cache the resource cache. Note: its loader must extend from {@link ResourceLoader}.
* @param path the URI path
* @param extra the extra parameter that will be passed to {@link
* ResourceLoader#parse(String,File,Object)} and {@link
* ResourceLoader#parse(String,URL,Object)}
*/
public static final <V> V get(
ResourceCache<V> cache, ServletContext ctx, String path, Object extra) {
// 20050905: Tom Yeh
// We don't need to handle the default name if user specifies only a dir
// because it is handled by the container directly
// And, web developer has to specify <welcome-file> in web.xml
URL url = null;
if (path == null || path.length() == 0) path = "/";
else if (path.charAt(0) != '/') {
if (path.indexOf("://") > 0) {
try {
url = new URL(path);
} catch (java.net.MalformedURLException ex) {
throw new SystemException(ex);
}
} else path = '/' + path;
}
if (url == null) {
if (path.startsWith("/~")) {
final ServletContext ctx0 = ctx;
final String path0 = path;
final int j = path.indexOf('/', 2);
final String ctxpath;
if (j >= 0) {
ctxpath = "/" + path.substring(2, j);
path = path.substring(j);
} else {
ctxpath = "/" + path.substring(2);
path = "/";
}
final ExtendletContext extctx = Servlets.getExtendletContext(ctx, ctxpath.substring(1));
if (extctx != null) {
url = extctx.getResource(path);
// if (log.debugable()) log.debug("Resolving "+path0+" to "+url);
if (url == null) return null;
try {
return cache.get(new ResourceInfo(path, url, extra));
} catch (Throwable ex) {
final IOException ioex = getIOException(ex);
if (ioex == null) throw SystemException.Aide.wrap(ex);
log.warningBriefly("Unable to load " + url, ioex);
}
return null;
}
ctx = ctx.getContext(ctxpath);
if (ctx == null) { // failed
// if (log.debugable()) log.debug("Context not found: "+ctxpath);
ctx = ctx0;
path = path0; // restore
}
}
final String flnm = ctx.getRealPath(path);
if (flnm != null) {
try {
return cache.get(new ResourceInfo(path, new File(flnm), extra));
// it is loader's job to check the existence
} catch (Throwable ex) {
final IOException ioex = getIOException(ex);
if (ioex == null) throw SystemException.Aide.wrap(ex);
log.warningBriefly("Unable to load " + flnm, ioex);
}
return null;
}
}
// try url because some server uses JAR format
try {
if (url == null) url = ctx.getResource(path);
if (url != null) return cache.get(new ResourceInfo(path, url, extra));
} catch (Throwable ex) {
final IOException ioex = getIOException(ex);
if (ioex == null) throw SystemException.Aide.wrap(ex);
log.warningBriefly("Unable to load " + path, ioex);
}
return null;
}
/**
* Setup parameter accordnig to ZkParameter annotation.
*
* @param <T> type of field.
* @param annot the annotation with parameter definition
* @param field the field to set
* @param clazz class of the field and parameter
*/
protected static <T> void setupZkParameter(
ZkParameter annot,
String paramName,
Class<T> clazz,
Field field,
Method method,
Object instance) {
T result = null;
Map[] paramMaps =
new Map[] {
Executions.getCurrent().getArg(),
Executions.getCurrent().getAttributes(),
Executions.getCurrent().getParameterMap()
};
Map paramMap = paramMaps[0];
for (Map map : paramMaps) {
if (map.containsKey(paramName)) {
paramMap = map;
break;
}
}
try {
if (annot.required()) result = ZKHelper.getRequiredParameter(paramMap, paramName, clazz);
else if (!paramMap.containsKey(paramName)) return; // optional parameter doesn't do anything
else result = ZKHelper.getOptionalParameter(paramMap, paramName, clazz, null);
} catch (IllegalArgumentException ex) {
throw new IllegalArgumentException(
"@ZkParameter(name='"
+ paramName
+ "', "
+ "required="
+ (annot.required() ? "true" : "false")
+ ", "
+ "createIfNull="
+ (annot.createIfNull() ? "true" : "false")
+ "): "
+ ex.getLocalizedMessage());
}
if (result == null && annot.createIfNull())
try {
result = (T) clazz.newInstance();
} catch (InstantiationException ex) {
throw new InstantiationError(
"@ZkParameter(name='"
+ paramName
+ "', "
+ "required="
+ (annot.required() ? "true" : "false")
+ ", "
+ "createIfNull="
+ (annot.createIfNull() ? "true" : "false")
+ ") - Parameter is null, unable to create new object with error: "
+ ex.getLocalizedMessage());
} catch (IllegalAccessException ex) {
throw new InstantiationError(
"@ZkParameter(name='"
+ paramName
+ "', "
+ "required="
+ (annot.required() ? "true" : "false")
+ ", "
+ "createIfNull="
+ (annot.createIfNull() ? "true" : "false")
+ ") - Parameter is null, unable to create new object, no public default constructor: "
+ ex.getLocalizedMessage());
}
if (field != null)
try {
field.setAccessible(true);
field.set(instance, result);
field.setAccessible(false);
} catch (IllegalArgumentException ex) {
throw new IllegalArgumentException(
"@ZkParameter(name='"
+ paramName
+ "', "
+ "required="
+ (annot.required() ? "true" : "false")
+ ", "
+ "createIfNull="
+ (annot.createIfNull() ? "true" : "false")
+ ") - Unable to set new value of field to '"
+ result
+ "': "
+ ex.getLocalizedMessage(),
ex);
} catch (IllegalAccessException ex) {
throw SystemException.Aide.wrap(ex);
}
if (method != null)
try {
method.setAccessible(true);
method.invoke(instance, new Object[] {result});
method.setAccessible(false);
} catch (IllegalAccessException ex) {
throw SystemException.Aide.wrap(ex);
} catch (IllegalArgumentException ex) {
throw new IllegalArgumentException(
"@ZkParameter(name='"
+ paramName
+ "', "
+ "required="
+ (annot.required() ? "true" : "false")
+ ", "
+ "createIfNull="
+ (annot.createIfNull() ? "true" : "false")
+ ") - Unable to set new value of method to '"
+ result
+ "': "
+ ex.getClass()
+ " - "
+ ex.getLocalizedMessage(),
ex);
} catch (InvocationTargetException ex) {
throw new IllegalArgumentException(
"@ZkParameter(name='"
+ paramName
+ "', "
+ "required="
+ (annot.required() ? "true" : "false")
+ ", "
+ "createIfNull="
+ (annot.createIfNull() ? "true" : "false")
+ ") - Unable to set new value of method to '"
+ result
+ "', error in method invocation: "
+ ex.getClass()
+ " - "
+ (ex.getTargetException() == null
? ex.getLocalizedMessage()
: ex.getTargetException().getLocalizedMessage()),
ex);
}
}
