Examples of org.apache.excalibur.source.Source

org.apache.excalibur.source.Source
This interface provides a simple interface for accessing a source of data.
When the Source object is no longer needed it must be released using the {@link SourceResolver}. This is very similar to looking up components from a ServiceSelector. In fact a source object can implement most lifecycle interfaces like Composable, Initializable, Disposable etc.
The data content can be constant or change over time. Using the {@link #getInputStream()} method you get always the up-to-date content.
If you want to track changes of the source object, this interface offers you some support for it by providing a SourceValidity object.
How does the caching work? The first time you get a Source object, you simply ask it for it's content via getInputStream() and then get the validity object by invoking getValidity. (Further calls to getValidity always return the same object! This is not updated!) The caching algorithm can now store this validity object together with the system identifier of the source. The next time, the caching algorithm wants to check if the cached content is still valid. It has a validity object already to check against.
If it is still the same Source than the first time, you have to call refresh() in order to discard the stored validity in the Source object. If it is a new Source object, calling refresh() should do no harm. After that an up-to-date validity object can retrieved by calling getValidity(). This can be used to test if the content is still valid as discribed in the source validity documentation. If the content is still valid, the cache knows what to do, if not, the new content can be get using getInputStream(). So either after a call to getValidity() or the getInputStream the validity object must be the same until refresh is called! @author Avalon Development Team @version CVS $Revision: 1.4 $ $Date: 2004/02/28 11:47:26 $

     * @param uri Uri of the source.
     * @param deep Deep of the hirachy, which should traversed.
     */
    private void collectSources(Hashtable sources, String uri,
                                int deep) throws ProcessingException {
        Source source = null;


        try {
            source = this.resolver.resolveURI(uri+this.queryString);
        } catch (Exception e) {
            if (sources.isEmpty()) {

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                                         throws SAXException,
                                                SourceException,
                                                ProcessingException,
                                                IOException {


        Source source = (Source) this.cachedsources.get(uri);


        if (source==null) {
            return;
        }


        try {
            AttributesImpl attributes = new AttributesImpl();


            attributes.addAttribute("", URI_ATTR_NAME, URI_ATTR_NAME,
                                    "CDATA", source.getURI());


            String name = source.getURI();


            if (name.endsWith("://")) {
                attributes.addAttribute("", NAME_ATTR_NAME,
                                        NAME_ATTR_NAME, "CDATA", "");
            } else if (name.endsWith("/")) {
                name = name.substring(1, name.length()-1);
                attributes.addAttribute("", NAME_ATTR_NAME,
                                        NAME_ATTR_NAME, "CDATA",
                                        name.substring(name.lastIndexOf("/")+
                                                       1, name.length()));
            } else {
                attributes.addAttribute("", NAME_ATTR_NAME,
                                        NAME_ATTR_NAME, "CDATA",
                                        name.substring(name.lastIndexOf("/")+
                                                       1, name.length()));
            }


            if ((source.getMimeType()!=null) &&
                (source.getMimeType().length()>0)) {
                attributes.addAttribute("", MIMETYPE_ATTR_NAME,
                                        MIMETYPE_ATTR_NAME, "CDATA",
                                        source.getMimeType());
            }


            if (source.getContentLength()>=0) {
                attributes.addAttribute("", CONTENTLENGTH_ATTR_NAME,
                                        CONTENTLENGTH_ATTR_NAME, "CDATA",
                                        String.valueOf(source.getContentLength()));
            }


            if (source.getLastModified()>0) {
                attributes.addAttribute("", LASTMODIFIED_ATTR_NAME,
                                        LASTMODIFIED_ATTR_NAME, "CDATA",
                                        String.valueOf(source.getLastModified()));
            }


            if (this.version && (source instanceof VersionableSource)) {
                VersionableSource versionablesource = (VersionableSource) source;

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            datatype.setSelectionList(selectionList);
        }
    }


    private Element readSelectionList(String src) throws Exception {
        Source source = resolve(src);
        InputSource inputSource = new InputSource(source.getInputStream());
        inputSource.setSystemId(source.getURI());
        Document document = DomHelper.parse(inputSource);
        Element selectionListElement = document.getDocumentElement();
        if (!Constants.WD_NS.equals(selectionListElement.getNamespaceURI()) || !"selection-list".equals(selectionListElement.getLocalName()))
            throw new Exception("Excepted a wd:selection-list element at " + DomHelper.getLocation(selectionListElement));
        return selectionListElement;

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     */
    public Map act(Redirector redirector, SourceResolver resolver, Map objectModel, String source,
        Parameters parameters) throws Exception {
        String urlstring = parameters.getParameter("url", source);
        String typestring = parameters.getParameter("type", "resource");
        Source src = null;


        try {
            src = resolver.resolveURI(urlstring);


            File resource = new File(new URL(src.getURI()).getFile());


            if (typestring.equals("resource") && src.exists()) {
                getLogger().debug(".act(): Resource (file or directory) exists: " + src.getURI());


                return EMPTY_MAP;
            } else if (typestring.equals("file") && resource.isFile()) {
                getLogger().debug(".act(): File exists: " + resource);

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    public Object getAttribute(String name, Configuration modeConf, Map objectModel)
        throws ConfigurationException {


        String resourceURI = name;
        
        Source source = null;
        boolean exists = false;
        try {
            source = resolver.resolveURI(resourceURI);
            exists = source.exists();
        } catch (SourceNotFoundException e) {
            exists = false;
        } catch (Exception e) {
            getLogger().warn("Exception resolving resource [" + resourceURI + "]", e);
            exists = false;

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        List baseUriList = new ArrayList();


        SourceResolver resolver = null;
        try {
            resolver = (SourceResolver) manager.lookup(SourceResolver.ROLE);
            Source source = null;
            for (int i = 0; i < pathConfigs.length; i++) {
                String uri = pathConfigs[i].getAttribute(ATTRIBUTE_SRC);
                try {
                    source = resolver.resolveURI(uri);
                    if (source.exists()) {
                        File file = SourceUtil.getFile(source);
                        if (file.isDirectory()) {
                            baseUriList.add(uri);
                        } else {
                            getLogger().warn("Omitting path [" + uri + "] (not a directory).");

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        SourceResolver resolver = null;
        try {
            resolver = (SourceResolver) manager.lookup(SourceResolver.ROLE);


            String[] baseUris = getBaseURIs(objectModel);
            Source source = null;
            int i = 0;
            while (resolvedUri == null && i < baseUris.length) {
                String uri = baseUris[i] + "/" + path;


                checkedUris += uri + "\n";


                if (getLogger().isDebugEnabled()) {
                    getLogger().debug("Trying to resolve URI [" + uri + "]");
                }


                try {
                    source = resolver.resolveURI(uri);
                    if (source.exists()) {
                        resolvedUri = uri;
                    } else {
                        if (getLogger().isDebugEnabled()) {
                            getLogger().debug("Skipping URI [" + uri + "] (does not exist).");
                        }

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    public static Publication getPublication(SourceResolver resolver, Request request)
        throws PublicationException {
        log.debug("Creating publication from resolver and request");
        Publication publication;
        String webappUri = ServletHelper.getWebappURI(request);
        Source source = null;
        try {
            source = resolver.resolveURI("context:///");
            File servletContext = SourceUtil.getFile(source);
            publication = PublicationFactory.getPublication(webappUri, servletContext);
        } catch (Exception e) {

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     *
     * @throws Exception DOCUMENT ME!
     */
    public Map act(Redirector redirector, SourceResolver resolver, Map objectModel, String src,
        Parameters parameters) throws Exception {
        Source input_source = resolver.resolveURI("");
        String sitemapParentPath = input_source.getURI();
        sitemapParentPath = sitemapParentPath.substring(5); // Remove "file:" protocol


        getLogger().debug(".act(): PARENT PATH OF SITEMAP: " + sitemapParentPath);


        // Get request object

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                String value = (String) cache.get(key);


                if (value == null) {
                    String parameterSrc = parameters.getParameter(parameterNames[i]) + "/" + src;


                    Source inputSource = null;
                    try {
                        inputSource = resolver.resolveURI(parameterSrc);


                        if (getLogger().isDebugEnabled()) {
                            getLogger().debug("File resolved to " + inputSource.getURI());
                        }


                        SourceUtil.toSAX(inputSource, xmlConsumer);
                    } finally {
                        if (inputSource != null) {

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