Examples of javax.el.ELContext

javax.el.ELContext
Context information for expression evaluation. To evaluate an {@link Expression}, an ELContext must be provided. The ELContext holds:
- a reference to the base {@link ELResolver} that will be consulted to resolve model objectsand their properties
- a reference to {@link FunctionMapper} that will be used to resolve EL Functions.
- a reference to {@link VariableMapper} that will be used to resolve EL Variables.
- a collection of all the relevant context objects for use by ELResolvers
- state information during the evaluation of an expression, such as whether a property has been resolved yet
The collection of context objects is necessary because each ELResolver may need access to a different context object. For example, JSP and Faces resolvers need access to a javax.servlet.jsp.JspContext and a javax.faces.context.FacesContext, respectively. Creation of ELContext objects is controlled through the underlying technology. For example, in JSP the JspContext.getELContext() factory method is used. Some technologies provide the ability to add an {@link ELContextListener} so that applications and frameworks can ensure their own contextobjects are attached to any newly created ELContext. Because it stores state during expression evaluation, an ELContext object is not thread-safe. Care should be taken to never share an ELContext instance between two or more threads.

        UIViewRoot root = new UIViewRoot();
        MockFacesContext12 facesContext = new MockFacesContext12();
        IMocksControl mocksControl = EasyMock.createControl();
        Application application = mocksControl.createMock(Application.class);
        ViewHandler viewHandler = mocksControl.createMock(ViewHandler.class);
        ELContext elContext = mocksControl.createMock(ELContext.class);
        ExpressionFactory expressionFactory = mocksControl.createMock(ExpressionFactory.class);
        ValueExpression valueExpression = mocksControl.createMock(ValueExpression.class);
        facesContext.setApplication(application);
        facesContext.setViewRoot(root);
        facesContext.setELContext(elContext);

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        checkNull(componentExpression, "componentExpression");
        checkNull(facesContext, "facesContext");
        checkNull(componentType, "componentType");


        ELContext elContext = facesContext.getELContext();


        try
        {
            Object retVal = componentExpression.getValue(elContext);

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    @SuppressWarnings("unchecked")
    @Override
    public final <T> T evaluateExpressionGet(final FacesContext context, final String expression,
                                             final Class<? extends T> expectedType) throws ELException
    {
        ELContext elContext = context.getELContext();


        ExpressionFactory factory = getExpressionFactory();


        return (T) factory.createValueExpression(elContext, expression, expectedType).getValue(elContext);
    }

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        long elapsed = -System.currentTimeMillis();
        for (int i = 0; i < iterations; i++) {
            final Map<String, ValueExpression> localContext = ProctorUtils.convertToValueExpressionMap(expressionFactory, values);
            final VariableMapper variableMapper = new MulticontextReadOnlyVariableMapper(localContext);


            final ELContext elContext = new ELContext() {
                @Override
                public ELResolver getELResolver() {
                    return elResolver;
                }

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    this.context = context;
    
    Application application = context.getApplication();
    ELResolver resolver = application.getELResolver();
    ELContext elContext = context.getELContext();
    this.var = var;
    
    SortField[] sortFields = sortOrder.getFields();
    
    expressions = new Expression[sortFields.length];

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    this.context = context;
    
    Application application = context.getApplication();
    ELResolver resolver = application.getELResolver();
    ELContext elContext = context.getELContext();
    this.var = var;
    
    expressions = new Expression[sortOrder.size()];
    
    int i = 0;

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      return skin;
    }
  }


  private void processProperties(FacesContext context, Map<Object, Object> properties) {
      ELContext elContext = context.getELContext();
      // replace all EL-expressions by prepared ValueBinding ?
      ApplicationFactory factory = (ApplicationFactory) FactoryFinder
      .getFactory(FactoryFinder.APPLICATION_FACTORY);
      Application app = factory.getApplication();

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    return genericPropertyClass;
  }
  
  public static Class<?> getContainerClass(FacesContext facesContext, ValueExpression expression) {
    ELContext initialELContext = facesContext.getELContext();


    CapturingELResolver capturingELResolver = new CapturingELResolver(initialELContext.getELResolver());
    Class<?> type = expression.getType(new ELContextWrapper(initialELContext, capturingELResolver));


    Class<?> containerType = type.getComponentType();
    if (containerType == null && type != null) {
      if (Collection.class.isAssignableFrom(type)) {

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    // If you change something here please do the same in the other class!


    if (submittedValue == null)
      throw new NullPointerException("submittedValue");
    
    ELContext elContext = facesContext.getELContext();
    ValueExpression vb = component.getValueExpression("value");
    Class<?> valueType = null;
    Class<?> arrayComponentType = null;
    if (vb != null) {
      valueType = vb.getType(elContext);

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  public void send(ResourceContext context) throws IOException {
    UriData data = (UriData) restoreData(context);
    FacesContext facesContext = FacesContext.getCurrentInstance();
    if (null != data && null != facesContext ) {
      // Send headers
      ELContext elContext = facesContext.getELContext();
//      if(data.expires != null){
//        ValueExpression binding = (ValueExpression) UIComponentBase.restoreAttachedState(facesContext,data.expires);
//        Date expires = (Date) binding.getValue(elContext);
//        context.setDateHeader("Expires",expires.getTime());
//      }

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