/**
* 实际删除私有属性，如果是窗口共有的portal属性，只是在本窗口中做删除标志，其他窗口还能正常获取
*
* @param name Name of the attribute to remove
*/
public void removeAttribute(String name) {
if (name == null) {
throw new NullPointerException("don't set a NULL named attribute");
}
synchronized (mutex) {
window.remove(name);
if (deleteAttributes == null) {
deleteAttributes = new HashSet<String>(4);
deleteAttributes.add(name);
}
}
}
/**
* 返回这个窗口的私有属性或portal主控请求对象的共同属性
*
* @param name Name of the attribute to retrieve
*/
public Object getAttribute(String name) {
Object value = null;
synchronized (mutex) {
if (deleteAttributes != null && deleteAttributes.contains(name)) {
return null;
}
value = window.get(name);
if (value == null) {
value = super.getAttribute(name);
}
}
return value;
}
/**
* 设置窗口私有属性
*
* @param name Name of the attribute to set
* @param value Value of the attribute to set
*/
public void setAttribute(String name, Object value) {
if (name == null) {
throw new NullPointerException("don't set a NULL named attribute");
}
if (value == null) {
removeAttribute(name);
return;
}
synchronized (mutex) {
window.set(name, value);
if (deleteAttributes != null) {
deleteAttributes.remove(name);
}
}
}
/** 返回这个窗口的私有属性名加portal主控请求对象共同属性的属性名 */
@SuppressWarnings("unchecked")
public Enumeration getAttributeNames() {
HashSet<String> keys;
synchronized (mutex) {
keys = new HashSet<String>(window.getAttributes().keySet());
Enumeration<String> names = super.getAttributeNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
if (deleteAttributes == null || !deleteAttributes.contains(name)) {
keys.add(name);
}
}
}
return new Enumerator(keys);
}
@Override
public HttpSession getSession(boolean create) {
HttpSession session = super.getSession(false);
if (session != null) {
return session;
}
if (create) {
if (window.getContainer().getInvocation().getResponse().isCommitted()) {
session =
new SessionAfterCommitted(
new IllegalStateException(
"Cannot create a session after the response has been committed"));
} else {
try {
session = super.getSession(true);
} catch (IllegalStateException e) {
session = new SessionAfterCommitted(e);
}
}
}
return session;
}
public Map<String, Object> getPrivateAttributes() {
return window.getAttributes();
}
