Examples of org.apache.struts.tiles.ComponentContext

org.apache.struts.tiles.ComponentContext
Component context.

    public InsertHandler( Map attributes, String page, String role, Controller controller  )
      {
      this.page = page;
      this.role = role;
      this.controller = controller;
      subCompContext = new ComponentContext( attributes );
      }

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    public InsertHandler( String page, String role, Controller controller )
      {
      this.page = page;
      this.role = role;
      this.controller = controller;
      subCompContext = new ComponentContext();
      }

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     * @exception JspException if a JSP exception has occurred
     */
  public int doStartTag() throws JspException
    {
      // retrieve component context
    ComponentContext compContext = (ComponentContext)pageContext.getAttribute( ComponentConstants.COMPONENT_CONTEXT, pageContext.REQUEST_SCOPE);
    if( compContext == null )
        throw new JspException ( "Error - tag importAttribute : no tiles context found." );


      // set scope
    scope = TagUtils.getScope( scopeName, PageContext.PAGE_SCOPE );


      // push attribute in requested context.
    if( name != null )
      {
      Object value = compContext.getAttribute(name);
        // Check if value exist and if we must send a runtime exception
      if( value == null )
        if(!isErrorIgnored)
          throw new JspException ( "Error - tag importAttribute : property '"+ name + "' not found in context. Check tag syntax" );
         else
          return SKIP_BODY;


      pageContext.setAttribute(name, value, scope);
      }
     else
      { // set all attributes
      Iterator names = compContext.getAttributeNames();
      while(names.hasNext())
        {
        String name = (String)names.next();
        pageContext.setAttribute(name, compContext.getAttribute(name), scope);
        } // end loop
      } // end if


      // Continue processing this page
    return SKIP_BODY;

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      {
        return EVAL_PAGE;
      } // end if


      // Get context
    ComponentContext compContext = (ComponentContext)pageContext.getAttribute( ComponentConstants.COMPONENT_CONTEXT, pageContext.REQUEST_SCOPE);


    if( compContext == null )
      throw new JspException ( "Error - tag.getAsString : component context is not defined. Check tag syntax" );


    Object value = compContext.getAttribute(attribute);
    if( value == null)
      { // no value : throw error or fail silently according to ignore
      if(isErrorIgnored == false )
        throw new JspException ( "Error - tag.getAsString : attribute '"+ attribute + "' not found in context. Check tag syntax" );
       else

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  public int doStartTag() throws JspException
    {
    if( id==null )
      id=attributeName;


    ComponentContext compContext = (ComponentContext)pageContext.getAttribute( ComponentConstants.COMPONENT_CONTEXT, pageContext.REQUEST_SCOPE);
    if( compContext == null )
      throw new JspException ( "Error - tag useAttribute : no tiles context found." );


    Object value = compContext.getAttribute(attributeName);
        // Check if value exist and if we must send a runtime exception
    if( value == null )
      if(!isErrorIgnored)
        throw new JspException ( "Error - tag useAttribute : attribute '"+ attributeName + "' not found in context. Check tag syntax" );
       else

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import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.JspException;


public class TilesHelper {
    public static Object getAttribute(String name, PageContext pageContext) throws JspException {
        ComponentContext compContext = (ComponentContext) pageContext.getAttribute(
                ComponentConstants.COMPONENT_CONTEXT, PageContext.REQUEST_SCOPE);


        if (compContext == null) {
            throw new JspException("Error - tag.getAttribute : component context is not defined. Check tag syntax");
        }


        return compContext.getAttribute(name);
    }

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     *
     * @param scope the named context scope to put the attributes into.
     */
    public void importAttributes(String scope)
    {
        ComponentContext context = getCurrentContext();
        Iterator names = context.getAttributeNames();


        if (scope.equals(PAGE_SCOPE))
        {
            while (names.hasNext())
            {
                String name = (String)names.next();
                velocityContext.put(name, context.getAttribute(name));
            }
        }
        else if (scope.equals(REQUEST_SCOPE))
        {
            while (names.hasNext())
            {
                String name = (String)names.next();
                request.setAttribute(name, context.getAttribute(name));
            }
        }
        else if (scope.equals(SESSION_SCOPE))
        {
            HttpSession session = request.getSession();
            while (names.hasNext())
            {
                String name = (String)names.next();
                session.setAttribute(name, context.getAttribute(name));
            }
        }
        else if (scope.equals(APPLICATION_SCOPE))
        {
            while (names.hasNext())
            {
                String name = (String)names.next();
                application.setAttribute(name, context.getAttribute(name));
            }
        }
    }

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        if (role != null && !this.request.isUserInRole(role))
        {
            return null;
        }


        ComponentContext subCompContext = new ComponentContext();
        return doInsert(subCompContext, page, role, controller);
    }

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        if (role != null && !this.request.isUserInRole(role))
        {
            return null;
        }


        ComponentContext subCompContext = new ComponentContext(attributes);
        return doInsert(subCompContext, page, role, controller);
    }

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     * Pops the tiles sub-context off the context-stack after the lower level
     * tiles have been rendered.
     */
    protected void popTilesContext()
    {
        ComponentContext context = (ComponentContext)this.contextStack.pop();
        ComponentContext.setContext(context, this.request);
    }

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