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.


    /**
     * 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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    /**
     * 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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    /**
     * 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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        if (resolver == null)
        {


            // Configure a default ELResolver per Section 5.6.2 of JSF 1.2
            CompositeELResolver composite = new CompositeELResolver();


            composite.add(new FacesImplicitObjectELResolver());


            CompositeELResolver nested = new CompositeELResolver();
            // FIXME - nested.add() "ELResolvers from application configuration resources"
            nested.add(new FacesVariableResolverChainWrapper());
            nested.add(new FacesPropertyResolverChainWrapper());
            Iterator items = resolvers.iterator();
            while (items.hasNext())
            {
                nested.add((ELResolver) items.next());
            }
            composite.add(nested);


            // composite.add(new faces.ManagedBeanELResolver()); // FIXME
            composite.add(new ResourceBundleELResolver());

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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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        ELAttributeEvaluator evaluator = new ELAttributeEvaluator();
        evaluator.setApplicationContext(applicationContext);
        MultiversionExpressionFactoryFactory efFactory = new MultiversionExpressionFactoryFactory();
        efFactory.setApplicationContext(applicationContext);
        evaluator.setExpressionFactory(efFactory.getExpressionFactory());
        ELResolver elResolver = new CompositeELResolver() {
            {
                add(new TilesContextELResolver());
                add(new TilesContextBeanELResolver());
                add(new ArrayELResolver(false));
                add(new ListELResolver(false));

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        if (efFactory instanceof TilesApplicationContextAware) {
            ((TilesApplicationContextAware) efFactory)
                    .setApplicationContext(applicationContext);
        }
        expressionFactory = efFactory.getExpressionFactory();
        resolver = new CompositeELResolver() {
            {
                add(new TilesContextELResolver());
                add(new TilesContextBeanELResolver());
                add(new ArrayELResolver(false));
                add(new ListELResolver(false));

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        if (efFactory instanceof TilesApplicationContextAware) {
            ((TilesApplicationContextAware) efFactory)
                    .setApplicationContext(applicationContext);
        }
        expressionFactory = efFactory.getExpressionFactory();
        resolver = new CompositeELResolver() {
            {
                add(new TilesContextELResolver());
                add(new TilesContextBeanELResolver());
                add(new ArrayELResolver(false));
                add(new ListELResolver(false));

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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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