/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package java.beans;
import java.applet.Applet;
import java.beans.beancontext.BeanContext;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import org.apache.harmony.beans.internal.nls.Messages;
public class Beans {
private static boolean designTime = false;
private static boolean guiAvailable = true;
public Beans() {
}
public static Object instantiate(ClassLoader cls, String beanName,
BeanContext beanContext, AppletInitializer initializer)
throws IOException, ClassNotFoundException {
Object result = instantiate(cls, beanName, beanContext);
if (result instanceof Applet) {
initializer.initialize((Applet) result, beanContext);
}
return result;
}
@SuppressWarnings("unchecked")
public static Object instantiate(ClassLoader cls, String beanName,
BeanContext beanContext) throws IOException, ClassNotFoundException {
Object result = instantiate(cls, beanName);
if (beanContext != null) {
beanContext.add(result);
}
return result;
}
public static Object instantiate(ClassLoader cls, String beanName)
throws IOException, ClassNotFoundException {
Object result = null;
String beanResourceName = getBeanResourceName(beanName);
InputStream is = (cls == null) ? ClassLoader
.getSystemResourceAsStream(beanResourceName) : cls
.getResourceAsStream(beanResourceName);
if (is != null) {
ObjectInputStream ois = (cls == null) ? new ObjectInputStream(is) : new CustomizedObjectInputStream(is, cls);
result = ois.readObject();
}
if (result == null) {
try {
Class<?> c = Class.forName(beanName, true,
cls == null ? ClassLoader.getSystemClassLoader() : cls);
try {
result = c.newInstance();
if (result instanceof Applet) {
Applet applet = (Applet) result;
applet.init();
}
} catch (IllegalAccessException iae) {
throw new ClassNotFoundException(iae.getClass() + ": " //$NON-NLS-1$
+ iae.getMessage());
}
} catch (InstantiationException ie) {
throw new ClassNotFoundException(ie.getClass() + ": " //$NON-NLS-1$
+ ie.getMessage());
}
}
return result;
}
public static Object getInstanceOf(Object bean, Class<?> targetType) {
return bean;
}
public static boolean isInstanceOf(Object bean, Class<?> targetType) {
if (bean == null) {
throw new NullPointerException(Messages.getString("beans.1D")); //$NON-NLS-1$
}
return targetType == null ? false : targetType.isInstance(bean);
}
public static synchronized void setGuiAvailable(boolean isGuiAvailable)
throws SecurityException {
checkPropertiesAccess();
guiAvailable = isGuiAvailable;
}
public static synchronized void setDesignTime(boolean isDesignTime)
throws SecurityException {
checkPropertiesAccess();
designTime = isDesignTime;
}
public static synchronized boolean isGuiAvailable() {
return guiAvailable;
}
public static synchronized boolean isDesignTime() {
return designTime;
}
private static void checkPropertiesAccess() throws SecurityException {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPropertiesAccess();
}
}
private static String getBeanResourceName(String beanName) {
return beanName.replace('.', '/') + ".ser"; //$NON-NLS-1$
}
}