Examples of org.apache.tapestry5.Binding

org.apache.tapestry5.Binding
A binding is a connection between a component and its container (another component), that allows the embedded component to gain access to resources defined by the container. Resources can represent any kind of value that can be obtained from the parent component, but is often a JavaBean property that can be read and updated. Different implementations of Binding are used to access different kinds of resources of the container.
A binding ultimately must provide access to the underlying annotations. In most cases, there are no annotations, but bindings that ultimate invoke methods or read and update fields must provide access to those annotations.

    {
        if (value == null) return;


        if (value instanceof Binding)
        {
            Binding binding = (Binding) value;


            resources.bindParameter(parameterName, binding);
            return;
        }

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            if (endx < 0) throw new TapestryException(ServicesMessages
                    .unclosedAttributeExpression(expression), location, null);


            String expansion = expression.substring(expansionx + 2, endx);


            final Binding binding = bindingSource.newBinding("attribute expansion", resources, resources,
                                                             BindingConstants.PROP, expansion, location);


            final StringProvider provider = new StringProvider()
            {
                public String provideString()
                {
                    try
                    {
                        Object raw = binding.get();


                        return typeCoercer.coerce(raw, String.class);
                    }
                    catch (Exception ex)
                    {

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        };
    }


    public RenderCommand newExpansionElement(ComponentResources componentResources, ExpansionToken token)
    {
        Binding binding = bindingSource.newBinding("expansion", componentResources, componentResources,
                                                   BindingConstants.PROP, token.getExpression(), token.getLocation());


        return new ExpansionPageElement(binding, typeCoercer);
    }

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        // Meta default of literal for the template.


        String defaultBindingPrefix = determineDefaultBindingPrefix(component, name,
                                                                    BindingConstants.LITERAL);


        Binding binding = findBinding(loadingElement, component, name, token.getValue(), defaultBindingPrefix,
                                      token.getLocation());


        if (binding != null)
        {
            component.bindParameter(name, binding);

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            String value = model.getParameterValue(name);


            String defaultBindingPrefix = determineDefaultBindingPrefix(newComponent, name,
                                                                        BindingConstants.PROP);


            Binding binding = findBinding(loadingComponent, newComponent, name, value, defaultBindingPrefix,
                                          newComponent.getLocation());


            if (binding != null)
            {
                newComponent.bindParameter(name, binding);

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            Map<String, Binding> loadingComponentBindingMap = componentIdToBindingMap
                    .get(loadingComponent.getCompleteId());


            // This may return null if the parameter is not bound in the loading component.


            Binding existing = loadingComponentBindingMap.get(loadingParameterName);


            if (existing == null) return null;


            String description = String.format("InheritedBinding[parameter %s %s(inherited from %s of %s)]", name,
                                               component.getCompleteId(), loadingParameterName,

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        String name = token.getName();


        BlockImpl block = new BlockImpl(token.getLocation(),
                                        String.format("Parmeter %s of %s", name, element.getCompleteId()));


        Binding binding = new LiteralBinding("block parameter " + name, block, token.getLocation());


        // TODO: Check that the t:parameter doesn't appear outside of an embedded component.


        element.bindParameter(name, binding);

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        for (String name : informals.keySet())
        {
            if (newComponentModel.getParameterModel(name) != null) continue;


            Binding binding = informals.get(name);


            newComponent.bindParameter(name, binding);
            newComponentBindings.put(name, binding);
        }
    }

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        replay();


        BindingFactory factory = new LiteralBindingFactory();


        Binding b = factory.newBinding("test binding", res, null, "Tapestry5", l);


        assertSame(InternalUtils.locationOf(b), l);


        assertEquals(b.get(), "Tapestry5");
        assertTrue(b.isInvariant());
        assertSame(b.getBindingType(), String.class);


        try
        {
            b.set(null);
            unreachable();
        }
        catch (TapestryException ex)
        {
            assertSame(ex.getLocation(), l);

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        replay();


        BindingFactory factory = new TranslateBindingFactory(source, new StringInternerImpl());


        Binding binding = factory.newBinding(description, resources, resources, expression, l);


        assertSame(binding.get(), translator);


        assertSame(InternalUtils.locationOf(binding), l);


        verify();
    }

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