Examples of org.apache.tapestry.Binding

org.apache.tapestry.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 as 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.

        String defaultBindingPrefix = determineDefaultBindingPrefix(
                component,
                name,
                TapestryConstants.LITERAL_BINDING_PREFIX);


        Binding binding = _bindingSource.newBinding(
                "parameter " + name,
                _loadingElement.getComponentResources(),
                component.getComponentResources(),
                defaultBindingPrefix,
                token.getValue(),

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                    TapestryConstants.PROP_BINDING_PREFIX);


            // At some point we may add meta data to control what the default prefix is within a
            // component.


            Binding binding = _bindingSource.newBinding(
                    "parameter " + name,
                    loadingComponent.getComponentResources(),
                    component.getComponentResources(),
                    defaultBindingPrefix,
                    value,

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    private void parameter(ParameterToken token)
    {
        BlockImpl block = new BlockImpl(token.getLocation());
        String name = token.getName();


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


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


        _activeElementStack.peek().bindParameter(name, binding);

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        return _element.getContainingPage().getRootComponent();
    }


    public boolean isInvariant(String parameterName)
    {
        Binding b = getBinding(parameterName);


        return b != null && b.isInvariant();
    }

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    }


    @SuppressWarnings("unchecked")
    public <T> T readParameter(String parameterName, Class<T> expectedType)
    {
        Binding b = getBinding(parameterName);


        try
        {
            // Will throw NPE if binding is null, but this should never be called if the
            // parameter is not bound.


            Object boundValue = b.get();


            return _typeCoercer.coerce(boundValue, expectedType);
        }
        catch (Exception ex)
        {

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        }
    }


    public Class getBoundType(String parameterName)
    {
        Binding b = getBinding(parameterName);


        return b != null ? b.getBindingType() : null;
    }

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    }


    @SuppressWarnings("unchecked")
    public <T> void writeParameter(String parameterName, T parameterValue)
    {
        Binding b = getBinding(parameterName);


        Class bindingType = b.getBindingType();


        try
        {
            Object coerced = _typeCoercer.coerce(parameterValue, bindingType);


            b.set(coerced);
        }
        catch (Exception ex)
        {
            throw new TapestryException(StructureMessages.writeParameterFailure(
                    parameterName,

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            // Skip all formal parameters.


            if (_componentModel.getParameterModel(name) != null)
                continue;


            Binding b = _bindings.get(name);


            Object value = b.get();


            if (value == null)
                continue;


            // Because Blocks can be passed in (right from the template, using <t:parameter>,

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    }


    public PageElement newExpansionElement(ComponentResources componentResources,
            ExpansionToken token)
    {
        Binding binding = _bindingSource.newBinding(
                "expansion",
                componentResources,
                componentResources,
                TapestryConstants.PROP_BINDING_PREFIX,
                token.getExpression(),

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        ComponentResources resources = newComponentResources(bean);
        Location l = newLocation();


        replay();


        Binding binding = _factory.newBinding("test binding", resources, null, "readOnly", l);


        assertEquals(binding.get(), "ReadOnly");


        try
        {
            binding.set("fail");
            unreachable();
        }
        catch (TapestryException ex)
        {
            assertEquals(

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Related Classes of org.apache.tapestry.Binding

org.apache.tapestry.internal.bindings.BindingFactoryTest

org.apache.tapestry.internal.bindings.PropBindingFactoryTest

org.apache.tapestry.internal.bindings.ValidateBindingFactoryTest

org.apache.tapestry.internal.services.BindingSourceImplTest

org.apache.tapestry.internal.services.ComponentDefaultProviderImplTest

org.apache.tapestry.internal.services.InheritedBindingTest

org.apache.tapestry.internal.services.PageElementFactoryImpl

org.apache.tapestry.internal.services.PageLoaderProcessor

org.apache.tapestry.internal.services.ParameterWorker

org.apache.tapestry.internal.services.ParameterWorkerTest

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