Java Code Examples for javax.servlet.jsp.PageContext#setAttribute()

@Override
public void setValue(ELContext context, Object base, Object property,
        Object value) throws NullPointerException,
        PropertyNotFoundException, PropertyNotWritableException,
        ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            int scope = page.getAttributesScope(key);
            if (scope != 0) {
                page.setAttribute(key, value, scope);
            } else {
                page.setAttribute(key, value);
            }
        }
    }
}
 

@Override
public void doTag() throws JspException {
	PageContext pageContext = (PageContext) super.getJspContext();
	MessageReader messageReader = (MessageReader) pageContext
			.getAttribute(Constants.PAGE_CONTEXT_MESSAGES);
	Object temp = null;
	if (scope == null) {
		key = messageReader.getMessage(key);
		pageContext.setAttribute(name, key, PageContext.PAGE_SCOPE);
		return;
	} else if (Constants.COMMAND.equals(scope)) {
		temp = pageContext.getRequest().getAttribute(
				Constants.COMMAND);
		temp = super.getReflectValue(temp, key);
	} else if (Constants.PAGE.equals(scope)) {
		temp = pageContext.getAttribute(key);
	} else if (Constants.REQUEST.equals(scope)) {
		temp = pageContext.getRequest().getAttribute(key);
	}
	if (temp != null) {
		key = messageReader.getMessage(temp.toString());
		if (key != null) {
			pageContext.setAttribute(name, key, PageContext.PAGE_SCOPE);
		}
	}
}
 

@Override
public void setValue(ELContext context, Object base, Object property,
        Object value) throws NullPointerException,
        PropertyNotFoundException, PropertyNotWritableException,
        ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            int scope = page.getAttributesScope(key);
            if (scope != 0) {
                page.setAttribute(key, value, scope);
            } else {
                page.setAttribute(key, value);
            }
        }
    }
}
 

@Override
public void doTag() throws JspException {
	PageContext pageContext = (PageContext) super.getJspContext();
	HttpSession httpSession = pageContext.getSession();
	MessageReader messageReader = null;
	if (httpSession != null) {
		Object temp = httpSession
				.getAttribute(Constants.SESSION_LOCALE);
		if (temp != null) {
			messageReader = new MessageReader(temp.toString());
		} else {
			messageReader = new MessageReader(null);
		}
	} else {
		messageReader = new MessageReader(null);
	}
	pageContext.setAttribute(Constants.PAGE_CONTEXT_MESSAGES,
			messageReader, PageContext.PAGE_SCOPE);
}
 

/**
 * INTERNAL: Create new user object in given scope.
 */
public static UserIF createUserSession(PageContext pageContext, int scope) {

  NavigatorConfigurationIF navConf = NavigatorUtils.getNavigatorApplication(pageContext).getConfiguration();
  // try to retrieve the user name from the request, otherwise null
  String username = null;
  if (pageContext.getRequest() instanceof HttpServletRequest)
    username = ((HttpServletRequest) pageContext.getRequest()).getRemoteUser();
  // create new user object
  UserIF user = new User(username, navConf);
  // set MVS settings
  user = setDefaultMVS(navConf, user);
  // set user object to session scope
  pageContext.setAttribute(NavigatorApplicationIF.USER_KEY, user, scope);
  log.debug("New user object ('" + user.getId() + "') created and bound in scope ( " + scope + ").");
  return user;
}
 

private String invokeFragmentIfNeeded(
        JspFragment fragment,
        String defaultValue,
        int currentIndex) throws JspException {
    PageContext p = pageContext;
    StringWriter w = new StringWriter();
    if (fragment != null) {
        if (currentIndex > 0) p.setAttribute(var, currentIndex);
        try {
            fragment.invoke(w);
        } catch (IOException e) {throw new JspException(e);}
        if (currentIndex > 0) p.removeAttribute(var);
    } else {
        w.append(Strings.substitute(
                defaultValue,
                Maps.hash(var, String.valueOf(currentIndex))));
    }
    return w.toString();
}
 

public static void getStatusItems(PageContext pageContext, String attributeName, String statusTypeId) {
    Delegator delegator = (Delegator) pageContext.getRequest().getAttribute("delegator");

    try {
        List<GenericValue> statusItems = EntityQuery.use(delegator)
                                                    .from("StatusItem")
                                                    .where("statusTypeId", statusTypeId)
                                                    .orderBy("sequenceId")
                                                    .cache(true)
                                                    .queryList();
        if (statusItems != null)
            pageContext.setAttribute(attributeName, statusItems);
    } catch (GenericEntityException e) {
        Debug.logError(e, module);
    }
}
 

/**
 * INTERNAL: Helper method for maintaining a relation mapping
 * instance throughout a page context.
 */  
public static RelationMapping getRelationMapping(PageContext ctxt) {
  RelationMapping db = (RelationMapping)
    ctxt.getAttribute("RelationMapping", PageContext.APPLICATION_SCOPE);
  if (db == null) {
    db = new RelationMapping();
    ctxt.setAttribute("RelationMapping", db, PageContext.APPLICATION_SCOPE);
  }
  return db;
}
 

/**
 * INTERNAL: Reset MVS settings in user object in session scope.
 */
public static void resetMVSsettingsInUserSession(PageContext pageContext) {
  NavigatorConfigurationIF navConf = NavigatorUtils.getNavigatorApplication(pageContext).getConfiguration();

  //! UserIF user = (UserIF) pageContext.getAttribute(NavigatorApplicationIF.USER_KEY,
  //!                                                 PageContext.SESSION_SCOPE);
  UserIF user = getUser(pageContext, false);
  if (user == null) return; // ignore if no user

  // reset MVS settings
  user = setDefaultMVS(navConf, user);
  // set user object to session scope (TODO: support other contexts?)
  pageContext.setAttribute(NavigatorApplicationIF.USER_KEY, user, PageContext.SESSION_SCOPE);
  log.info("MVS settings in user session has been reset.");
}
 

public static ScopeManager get(PageContext page) {
    ScopeManager mngr = (ScopeManager) page.getAttribute(MNGR_KEY);
    if (mngr == null) {
        mngr = new ScopeManager(page);
        page.setAttribute(MNGR_KEY, mngr);
    }
    return mngr;
}
 

/**
 * Get the next unique ID (within the given {@link PageContext}) for the supplied name.
 */
public static String nextId(String name, PageContext pageContext) {
	String attributeName = PAGE_CONTEXT_ATTRIBUTE_PREFIX + name;
	Integer currentCount = (Integer) pageContext.getAttribute(attributeName);
	currentCount = (currentCount != null ? currentCount + 1 : 1);
	pageContext.setAttribute(attributeName, currentCount);
	return (name + currentCount);
}
 

/**
 *
 * Finds the ImplicitObjects associated with the PageContext,
 * creating it if it doesn't yet exist.
 **/
public static ImplicitObjects getImplicitObjects (PageContext pContext)
{
  ImplicitObjects objs = 
    (ImplicitObjects)
    pContext.getAttribute (sAttributeName,
                           PageContext.PAGE_SCOPE);
  if (objs == null) {
    objs = new ImplicitObjects (pContext);
    pContext.setAttribute (sAttributeName,
                           objs,
                           PageContext.PAGE_SCOPE);
  }
  return objs;
}
 

/**
 * Get the next unique ID (within the given {@link PageContext}) for the supplied name.
 */
public static String nextId(String name, PageContext pageContext) {
	String attributeName = PAGE_CONTEXT_ATTRIBUTE_PREFIX + name;
	Integer currentCount = (Integer) pageContext.getAttribute(attributeName);
	currentCount = (currentCount != null ? currentCount + 1 : 1);
	pageContext.setAttribute(attributeName, currentCount);
	return (name + currentCount);
}
 

public static ScopeManager get(PageContext page) {
    ScopeManager mngr = (ScopeManager) page.getAttribute(MNGR_KEY);
    if (mngr == null) {
        mngr = new ScopeManager(page);
        page.setAttribute(MNGR_KEY, mngr);
    }
    return mngr;
}
 

/**
 * Get the next unique ID (within the given {@link PageContext}) for the supplied name.
 */
public static String nextId(String name, PageContext pageContext) {
	String attributeName = PAGE_CONTEXT_ATTRIBUTE_PREFIX + name;
	Integer currentCount = (Integer) pageContext.getAttribute(attributeName);
	currentCount = (currentCount != null ? currentCount + 1 : 1);
	pageContext.setAttribute(attributeName, currentCount);
	return (name + currentCount);
}
 

/**
 * Get the next unique ID (within the given {@link PageContext}) for the supplied name.
 */
public static String nextId(String name, PageContext pageContext) {
	String attributeName = PAGE_CONTEXT_ATTRIBUTE_PREFIX + name;
	Integer currentCount = (Integer) pageContext.getAttribute(attributeName);
	currentCount = (currentCount != null ? currentCount + 1 : 1);
	pageContext.setAttribute(attributeName, currentCount);
	return (name + currentCount);
}
 

public static ScopeManager get(PageContext page) {
    ScopeManager mngr = (ScopeManager) page.getAttribute(MNGR_KEY);
    if (mngr == null) {
        mngr = new ScopeManager(page);
        page.setAttribute(MNGR_KEY, mngr);
    }
    return mngr;
}
 

static void setDefaultLogger(final PageContext pageContext, final Log4jTaglibLogger logger) {
    pageContext.setAttribute(TagUtils.LOGGER_SCOPE_ATTRIBUTE, logger, PageContext.PAGE_SCOPE);
}
 

/**
 * If the base object is <code>null</code>, sets an existing scoped
 * attribute to the new value, or creates a new scoped attribute if one
 * does not exist by this name.
 *
 * <p>If the provided attribute name matches the key of an attribute 
 * in page scope, request scope, session scope, or application scope, the 
 * corresponding attribute value will be replaced by the provided value.
 * Otherwise, a new page scope attribute will be created with the
 * given name and value.</p>
 *
 * <p>The <code>propertyResolved</code> property of the 
 * <code>ELContext</code> object must be set to <code>true</code> by 
 * this resolver before returning if base is <code>null</code>. If 
 * this property is not <code>true</code> after this method is called,
 * the caller should ignore the return value.</p>
 *
 * @param context The context of this evaluation.
 * @param base Only <code>null</code> is handled by this resolver.
 *     Other values will result in an immediate return.
 * @param property The name of the scoped attribute to set.
 * @param val The value for the scoped attribute.
 * @throws NullPointerException if context is <code>null</code>.
 * @throws ELException if an exception was thrown while performing
 *     the property or variable resolution. The thrown exception
 *     must be included as the cause property of this exception, if
 *     available.
 */
public void  setValue(ELContext context,
                      Object base,
                      Object property,
                      Object val) {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property instanceof String) {
            PageContext ctxt = (PageContext)
                                   context.getContext(JspContext.class);
            String attr = (String) property;
            if (ctxt.getAttribute(attr, PageContext.REQUEST_SCOPE) != null)
                ctxt.setAttribute(attr, val, PageContext.REQUEST_SCOPE);
            else if (ctxt.getAttribute(attr, PageContext.SESSION_SCOPE) != null)
                ctxt.setAttribute(attr, val, PageContext.SESSION_SCOPE);
            else if (ctxt.getAttribute(attr, PageContext.APPLICATION_SCOPE) != null)
                ctxt.setAttribute(attr, val, PageContext.APPLICATION_SCOPE);
            else {
                ctxt.setAttribute(attr, val, PageContext.PAGE_SCOPE);
            }
        }
    }
}
 

/**
 * Stores a ListCommand in the page context and makes it current
 * @param ctx caller's page context
 * @param uniqueName owning list's unique name
 * @param cmd new current command
 */
public static void setCurrentCommand(PageContext ctx, String uniqueName,
        ListCommand cmd) {
    ctx.setAttribute(uniqueName + "_cmd", cmd);
}