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.

  Class<?> initRegexpClass(ArrayList<String> vars)
  {
    HashMap<String,Object> map = new HashMap<String,Object>();
    map.put("regexp", vars);


    ELContext mapEnv = new ConfigELContext(new MapVariableResolver(map));


    String rawName = getServletName();
    String rawClassName = getServletClassName();


    if (rawName == null)

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      return null;
    
    HashMap<String,Object> map = new HashMap<String,Object>();
    map.put("regexp", vars);


    ELContext mapEnv = new ConfigELContext(new MapVariableResolver(map));


    String rawName = getServletName();
    String rawClassName = getServletClassName();


    if (rawName == null)

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{
  private Expr _expr;


  public ExprCondition(String expr)
  {
    ELContext elContext = new RewriteELContext();
    
    _expr = new ELParser(elContext, expr).parse();
  }

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      HashMap<String,Object> varMap = new HashMap<String,Object>();
      varMap.put("host", new HostRegexpVar(key));
      
      ELResolver resolver = new MapVariableResolver(varMap);


      ELContext env = new ConfigELContext(resolver);


      hostName = EL.evalString(hostNamePattern, env);
    }


    HostController controller

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    }


    public void testSetValue()
    {
        // set value of #{foo} to BAR via ValueExpression
        ELContext elContext = facesContext.getELContext();
        ValueExpression ve = application.getExpressionFactory()
                .createValueExpression(elContext, "#{foo}", String.class);
        ve.setValue(elContext, "BAR");
        assertEquals("BAR", externalContext.getRequestMap().get("foo"));
    }

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    public void testGetValue()
    {
        // set value of #{foo} to BAR in request scope
        externalContext.getRequestMap().put("foo", "BAR");
        // resolve value of #{foo} via ValueExpression
        ELContext elContext = facesContext.getELContext();
        ValueExpression ve = application.getExpressionFactory()
                .createValueExpression(elContext, "#{foo}", String.class);
        Object value = ve.getValue(elContext);
        assertEquals("BAR", value);
    }

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    public void testGetCompositeValue()
    {
        // set value of #{foo} to BAR in request scope
        externalContext.getRequestMap().put("foo", "BAR");
        // resolve value of #{foo} via ValueExpression
        ELContext elContext = facesContext.getELContext();
        ValueExpression ve = application.getExpressionFactory()
                .createValueExpression(elContext, "test #{foo}", String.class);
        Object value = ve.getValue(elContext);
        assertEquals("test BAR", value);
    }

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        }
        // RF-1073
        try {
            ValueExpression ve = getValueExpression("currentDate");
            if (ve != null) {
                ELContext elContext = facesContext.getELContext();
                if (ve.getType(elContext).equals(String.class)) {
                    DateTimeConverter convert = new DateTimeConverter();
                    convert.setLocale(CalendarHelper.getAsLocale(facesContext, this, getLocale()));
                    convert.setPattern(CalendarHelper.getDatePatternOrDefault(this));
                    ve.setValue(facesContext.getELContext(), convert.getAsString(facesContext, this, currentDate));

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    public void when_attribute_value_expression_evaluates_to_null_then_evaluateAttribute_should_return_attribute_value() {
        // given
        Map<String, Object> attributes = Maps.newTreeMap();
        Object value = new Object();
        attributes.put("value", value);
        ELContext elContext = facesEnvironment.getElContext();


        ValueExpression valueExpression = facesEnvironment.createMock(ValueExpression.class);




        UIComponent component = createMockComponent();

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        // given
        Map<String, Object> attributes = Maps.newTreeMap();
        Object attributeValue = new Object();
        Object valueExpressionValue = new Object();
        attributes.put("value", attributeValue);
        ELContext elContext = facesEnvironment.getElContext();


        ValueExpression valueExpression = facesEnvironment.createMock(ValueExpression.class);


        UIComponent component = createMockComponent();

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