Examples of org.apache.tapestry.spec.IComponentSpecification

org.apache.tapestry.spec.IComponentSpecification
A specification for a component, as read from an XML specification file.
A specification consists of
- An implementing class
- An optional template
- An optional description
- A set of contained components
- Bindings for the properties of each contained component
- A set of named assets
- Definitions for helper beans
- Any reserved names (used for HTML attributes)
From this information, an actual component may be instantiated and initialized. Instantiating a component is usually a recursive process, since to initialize a container component, it is necessary to instantiate and initialize its contained components as well. @see org.apache.tapestry.IComponent @see IContainedComponent @see IComponentSpecification @see org.apache.tapestry.engine.IPageLoader @author glongman@intelligentworks.com @version $Id: IComponentSpecification.java 243791 2004-02-19 17:38:13Z hlship $

        if (Tapestry.isNonBlank(type))
            throw new DocumentParseException(
                Tapestry.format("SpecificationParser.both-type-and-copy-of", id),
                getResourceLocation());


        IComponentSpecification spec = (IComponentSpecification) digester.getRoot();


        IContainedComponent source = spec.getComponent(copyOf);
        if (source == null)
            throw new DocumentParseException(
                Tapestry.format("SpecificationParser.unable-to-copy", copyOf),
                getResourceLocation());

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        if (debug)
            LOG.debug(_component + ": connecting parameters and properties");


        List list = new ArrayList();
        IComponentSpecification spec = _component.getSpecification();
        IResourceResolver resolver = _component.getPage().getEngine().getResourceResolver();


        IParameterConnector disabledConnector = null;


        Collection names = spec.getParameterNames();
        Iterator i = names.iterator();
        while (i.hasNext())
        {
            String name = (String) i.next();


            if (debug)
                LOG.debug("Connecting parameter " + name + ".");


            IBinding binding = _component.getBinding(name);
            if (binding == null)
            {
                if (debug)
                    LOG.debug("Not bound.");


                continue;
            }


            IParameterSpecification pspec = spec.getParameter(name);
            Direction direction = pspec.getDirection();


            if (direction != Direction.IN && direction != Direction.FORM)
            {
                if (debug)

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        {
            setSpecification(framework.getComponentSpecification(_type));
            return;
        }


        IComponentSpecification specification =
            getDelegate().findComponentSpecification(cycle, namespace, _type);


        setSpecification(specification);


        // If not found by here, an exception will be thrown.

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    }


    private void install()
    {
        INamespace namespace = getNamespace();
        IComponentSpecification specification = getSpecification();


        if (LOG.isDebugEnabled())
            LOG.debug(
                "Installing component type "
                    + _type

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        if (_componentDigester == null)
            _componentDigester = constructComponentDigester();


        try
        {
            IComponentSpecification result =
                (IComponentSpecification) parse(_componentDigester, resourceLocation);


            result.setSpecificationLocation(resourceLocation);


            return result;
        }
        catch (DocumentParseException ex)
        {

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        if (_pageDigester == null)
            _pageDigester = constructPageDigester();


        try
        {
            IComponentSpecification result =
                (IComponentSpecification) parse(_pageDigester, resourceLocation);


            result.setSpecificationLocation(resourceLocation);


            return result;
        }
        catch (DocumentParseException ex)
        {

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        }


        // Not found by any normal rule, so its time to
        // consult the delegate.


        IComponentSpecification specification =
            getDelegate().findPageSpecification(cycle, namespace, _simpleName);
            
        setSpecification(specification);
    }

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    private void setupImplicitPage(IResourceLocation location)
    {
        if (LOG.isDebugEnabled())
            LOG.debug("Found HTML template at " + location);
    // TODO The SpecFactory in Specification parser should be used in some way to create an IComponentSpecifciation!
        IComponentSpecification specification = new ComponentSpecification();
        specification.setPageSpecification(true);
        specification.setSpecificationLocation(location);


        setSpecification(specification);


        install();
    }

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    }


    private void install()
    {
        INamespace namespace = getNamespace();
        IComponentSpecification specification = getSpecification();


        if (LOG.isDebugEnabled())
            LOG.debug(
                "Installing page " + _simpleName + " into " + namespace + " as " + specification);

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    /**
     * @see org.apache.tapestry.pageload.IComponentVisitor#visitComponent(org.apache.tapestry.IComponent)
     */
    public void visitComponent(IComponent component)
    {
        IComponentSpecification spec = component.getSpecification();


        Iterator i = spec.getParameterNames().iterator();


        while (i.hasNext())
        {
            String name = (String) i.next();
            IParameterSpecification parameterSpec = spec.getParameter(name);


            String defaultValue = parameterSpec.getDefaultValue();
            if (defaultValue == null)
                continue;

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