Examples of org.apache.excalibur.source.TraversableSource

org.apache.excalibur.source.TraversableSource
A traversable source is a source that can have children and a parent, like a file system. @author Avalon Development Team @version CVS $Revision: 1.5 $ $Date: 2004/02/28 11:47:26 $

     * @throws  SAXException if an error occurs while outputting the document
     * @throws  ProcessingException if something went wrong while traversing
     *                              the source hierarchy 
     */
    public void generate() throws SAXException, ProcessingException {
        TraversableSource inputSource = null;
        try {
            inputSource = (TraversableSource) this.resolver.resolveURI(this.source);


            if (!inputSource.exists()) {
                throw new ResourceNotFoundException(this.source + " does not exist.");
            }


            this.contentHandler.startDocument();
            this.contentHandler.startPrefixMapping(PREFIX, URI);

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     * 
     * @param source the traversable source whose ancestors shall be retrieved
     * @return a Stack containing the ancestors.
     */
    protected Stack getAncestors(TraversableSource source) throws IOException {
        TraversableSource parent = source;
        Stack ancestors = new Stack();


        while ((parent != null) && !isRoot(parent)) {
            parent = (TraversableSource) parent.getParent();
            if (parent != null) {
                ancestors.push(parent);
            } else {
                // no ancestor matched the root pattern
                ancestors.clear();

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                        }
                    });
                } else if (sort.equals("collection")) {
                    Arrays.sort(contents.toArray(), new Comparator() {
                        public int compare(Object o1, Object o2) {
                            TraversableSource ts1 = (TraversableSource) o1;
                            TraversableSource ts2 = (TraversableSource) o2;


                            if (reverse) {
                                if (ts2.isCollection() && !ts1.isCollection())
                                    return -1;
                                if (!ts2.isCollection() && ts1.isCollection())
                                    return 1;
                                return ts2.getName().compareTo(ts1.getName());
                            }
                            if (ts2.isCollection() && !ts1.isCollection())
                                return 1;
                            if (!ts2.isCollection() && ts1.isCollection())
                                return -1;
                            return ts1.getName().compareTo(ts2.getName());
                        }
                    });
                }
                
                addContent(source);

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        if (getLogger().isDebugEnabled()) {
            getLogger().debug("copy: " + source.getURI() + " -> " + destination.getURI());
        }
        
        if (source instanceof TraversableSource) {
            final TraversableSource origin = (TraversableSource) source;
            ModifiableTraversableSource target = null;
            if (origin.isCollection()) {
                if (!(destination instanceof ModifiableTraversableSource)) {
                    final String message = "copy() is forbidden: " +
                        "Cannot create a collection at the indicated destination.";
                    getLogger().warn(message);
                    return STATUS_FORBIDDEN;
                }
                // TODO: copy properties
                target = ((ModifiableTraversableSource) destination);
                target.makeCollection();
                if (recurse) {
                    Iterator children = origin.getChildren().iterator();
                    while (children.hasNext()) {
                        TraversableSource child = (TraversableSource) children.next();
                        int status = copy(child,target.getChild(child.getName()),recurse);
                        // TODO: record this status
                        // according to the spec we must continue moving files even though
                        // a part of the move has not succeeded
                    }
                }

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        }


        ByteArrayOutputStream out = null;
        InputStream in = null;
        SourceResolver resolver = null;
        TraversableSource source = null;
        try {
            resolver = (SourceResolver) this.manager.lookup(SourceResolver.ROLE);
            source = (TraversableSource) resolver.resolveURI(getRealSourceUri());


            if (source.exists() && !source.isCollection()) {
                byte[] buf = new byte[4096];
                out = new ByteArrayOutputStream();
                in = source.getInputStream();
                int read = in.read(buf);


                while (read > 0) {
                    out.write(buf, 0, read);
                    read = in.read(buf);
                }


                this.data = out.toByteArray();
                this.mimeType = source.getMimeType();
            }
        } catch (Exception e) {
            throw new RepositoryException(e);
        } finally {
            try {

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    /**
     * 
     */
    public Collection getChildren() throws RepositoryException {
        SourceResolver resolver = null;
        TraversableSource source = null;
        try {
            resolver = (SourceResolver) this.manager.lookup(SourceResolver.ROLE);
            source = (TraversableSource) resolver.resolveURI(this.contentSource.getRealSourceUri());
            Collection children = source.getChildren();
            java.util.Iterator iterator = children.iterator();
            java.util.Vector newChildren = new java.util.Vector();
            while (iterator.hasNext()) {
                TraversableSource child = (TraversableSource) iterator.next();
                newChildren.add(new SourceNode(getSession(),
                        getSourceURI() + "/" + child.getName(), this.manager, getLogger()));
            }
            return newChildren;
        } catch (Exception e) {
            throw new RepositoryException(e);
        }

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    /**
     * 
     */
    public boolean isCollection() throws RepositoryException {
        SourceResolver resolver = null;
        TraversableSource source = null;
        try {
            resolver = (SourceResolver) this.manager.lookup(SourceResolver.ROLE);
            source = (TraversableSource) resolver.resolveURI(this.contentSource.getRealSourceUri());
            return source.isCollection();
        } catch (Exception e) {
            throw new RepositoryException(e);
        }
    }

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        if (! (dest instanceof ModifiableSource)) {
            throw new IllegalArgumentException("Non-writeable URI : " + dest.getURI());
        }


        if (dest instanceof TraversableSource) {
            TraversableSource trDest = (TraversableSource) dest;
            if (trDest.isCollection()) {
                if (src instanceof TraversableSource) {
                    dest = trDest.getChild(((TraversableSource)src).getName());
                } else if (src instanceof PartSource){
                    // FIXME : quick hack to store "upload://xxx" sources into directories
                    // it would be better for the PartSource to be Traversable, or to
                    // create a new "NamedSource" interface
                    dest = trDest.getChild(((PartSource)src).getPart().getFileName());
                }
            }
        }


        // And transfer all content.

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        try {
            src = this.resolver.resolveURI(this.source);
            if (!(src instanceof TraversableSource)) {
                throw new SourceException(this.source + " is not a traversable source");
            }
            final TraversableSource inputSource = (TraversableSource) src;


            if (!inputSource.exists()) {
                throw new ResourceNotFoundException(this.source + " does not exist.");
            }


            this.contentHandler.startDocument();
            this.contentHandler.startPrefixMapping(PREFIX, URI);

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     *
     * @param source the traversable source whose ancestors shall be retrieved
     * @return a Stack containing the ancestors.
     */
    protected Stack getAncestors(TraversableSource source) throws IOException {
        TraversableSource parent = source;
        Stack ancestors = new Stack();


        while ((parent != null) && !isRoot(parent)) {
            parent = (TraversableSource) parent.getParent();
            if (parent != null) {
                ancestors.push(parent);
            } else {
                // no ancestor matched the root pattern
                ancestors.clear();

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