Examples of javax.el.CompositeELResolver

javax.el.CompositeELResolver
Maintains an ordered composite list of child ELResolvers. Though only a single ELResolver is associated with an ELContext, there are usually multiple resolvers considered for any given variable or property resolution. ELResolvers are combined together using a CompositeELResolver, to define rich semantics for evaluating an expression. For the {@link #getValue(ELContext,Object,Object)}, {@link #getType(ELContext,Object,Object)}, {@link #setValue(ELContext,Object,Object,Object)} and{@link #isReadOnly(ELContext,Object,Object)} methods, an ELResolver is not responsible forresolving all possible (base, property) pairs. In fact, most resolvers will only handle a base of a single type. To indicate that a resolver has successfully resolved a particular (base, property) pair, it must set the propertyResolved property of the ELContext to true. If it could not handle the given pair, it must leave this property alone. The caller must ignore the return value of the method if propertyResolved is false. The CompositeELResolver initializes the ELContext.propertyResolved flag to false, and uses it as a stop condition for iterating through its component resolvers. The ELContext.propertyResolved flag is not used for the design-time methods {@link #getFeatureDescriptors(ELContext,Object)} and{@link #getCommonPropertyType(ELContext,Object)}. Instead, results are collected and combined from all child ELResolvers for these methods.

        return elResolver;
    }


    private ELResolver createFacesResolver()
    {
        final CompositeELResolver resolver = new FacesCompositeELResolver(Scope.Faces);
        getResolverBuilderForFaces().build(resolver);
        return resolver;
    }

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    public static void main(final String[] args) {
        final FunctionMapper functionMapper = new LibraryFunctionMapperBuilder().add("proctor", ProctorRuleFunctions.class).build();


        final ExpressionFactory expressionFactory = new ExpressionFactoryImpl();


        final CompositeELResolver elResolver = new CompositeELResolver();
        elResolver.add(new ArrayELResolver());
        elResolver.add(new ListELResolver());
        elResolver.add(new BeanELResolver());
        elResolver.add(new MapELResolver());


        final Map<String, Object> values = Maps.newLinkedHashMap();
        values.put("countries", Sets.newHashSet("AA", "BB", "CC", "DD", "EE", "FF", "GG", "HH", "II", "JJ", "KK", "LL", "MM"));
        values.put("AA", "AA");
        values.put("CC", "CC");

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   * @return results from the pipeline, or null if there are no results
   */
  public Results execute(GadgetContext context, Collection<PipelinedData> pipelines) {
    List<Object> results = Lists.newArrayList();
    Map<String, Object> elResults = Maps.newHashMap();
    CompositeELResolver rootObjects = new CompositeELResolver();
    rootObjects.add(new GadgetELResolver(context));
    rootObjects.add(new RootELResolver(elResults));
    
    List<PipelineState> pipelineStates = Lists.newArrayList();
    for (PipelinedData pipeline : pipelines) {
      PipelinedData.Batch batch = pipeline.getBatch(expressions, rootObjects);
      pipelineStates.add(new PipelineState(pipeline, batch));

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  }


  private ELResolver createELResolver() {
    this.instantiated = true;
    if (this.resolver == null) {
      CompositeELResolver r = new CompositeELResolver();
      r.add(new ImplicitObjectELResolver());
      for (Iterator itr = this.resolvers.iterator(); itr.hasNext();) {
        r.add((ELResolver) itr.next());
      }
      r.add(new MapELResolver());
      r.add(new ResourceBundleELResolver());
      r.add(new ListELResolver());
      r.add(new ArrayELResolver());  
      r.add(new BeanELResolver());
      r.add(new ScopedAttributeELResolver());
      this.resolver = r;
    }
    return this.resolver;
  }

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                return;
            }
            
            // register an empty resolver for now. It will be populated after the 
            // first request is serviced.
            CompositeELResolver compositeELResolverForJsp = 
                new FacesCompositeELResolver(FacesCompositeELResolver.ELResolverChainType.JSP);
            ApplicationAssociate associate =
                     ApplicationAssociate.getInstance(context);
            if (associate != null) {
                associate.setFacesELResolverForJsp(compositeELResolverForJsp);

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    /**
     * Factory method to create the EL context
     */
    protected ELContext createContext() {
        ELResolver resolver = new CompositeELResolver() {
            {
                //add(methodResolver);
                add(new ArrayELResolver(false));
                add(new ListELResolver(false));
                add(new MapELResolver(false));

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        return elResolver;
    }


    private ELResolver createFacesResolver()
    {
        final CompositeELResolver resolver = new FacesCompositeELResolver(Scope.Faces);
        getResolverBuilderForFaces().build(resolver);
        return resolver;
    }

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    private ELResolver createFacesResolver()
    {
        boolean supportJSPAndFacesEL = MyfacesConfig.getCurrentInstance(
                                getFaceContext().getExternalContext()).isSupportJSPAndFacesEL();
        CompositeELResolver resolver;
        if (supportJSPAndFacesEL)
        {
            resolver = new FacesCompositeELResolver(Scope.Faces);
        }
        else
        {
            resolver = new CompositeELResolver();
        }
        getResolverBuilderForFaces().build(resolver);
        return resolver;
    }

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        defaultValidatorIds = new LinkedHashSet<String>();
        behaviorMap = new ConcurrentHashMap<String, Object>();
        elContextListeners = new CopyOnWriteArrayList<ELContextListener>();
        propertyResolver = new PropertyResolverImpl();
        variableResolver = new VariableResolverImpl();
        elResolvers = new CompositeELResolver();


        FacesContext ctx = FacesContext.getCurrentInstance();
        WebConfiguration webConfig = WebConfiguration.getInstance(ctx.getExternalContext());
        passDefaultTimeZone = webConfig.isOptionEnabled(DateTimeConverterUsesSystemTimezone);
        registerPropertyEditors = webConfig.isOptionEnabled(RegisterConverterPropertyEditors);

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        return elResolver;
    }


    private ELResolver createFacesResolver()
    {
        final CompositeELResolver resolver = new FacesCompositeELResolver(Scope.Faces);
        getResolverBuilderForFaces().build(resolver);
        return resolver;
    }

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