Examples of org.apache.jackrabbit.spi.ItemId

org.apache.jackrabbit.spi.ItemId

An ItemId identifies an item using a combination of unique ID and path. There are three basic forms of an ItemId. The following table shows each of the allowed combinations where an X in the column indicates that a value is set and a - indicates that the value is null:

UniqueID	Path	Usage
X	-	The item can be identified with a unique ID. In most cases such an item is also mix:referenceable but there is no restriction in that respect. An SPI implementation may also use a unique ID to identify non-referenceable nodes. Whether a node is referenceable is purely governed by its node type or the assigned mixin types. Note, that the format of the ID it is left to the implementation.
-	X	The item can not be identified with a unique ID and none of its ancestors can be identified with a unique ID. The item is identified by an absolute path.
X	X	The item can not be identified with a unique ID but one of its ancestors can. {@link #getUniqueID} returns the unique ID of the nearest ancestor, whichcan be identified with a unique ID. The relative path provides a navigation path from the above mentioned ancestor to the item identified by the `ItemId`.

Two ItemIds should be considered equal if both the unique part and the path part are equal AND if they denote the same {@link #denotesNode() type} of ItemId.


    /**
     * @see NodeEntry#refresh(Event)
     */
    public void refresh(Event childEvent) {
        ItemId eventId = childEvent.getItemId();
        Path eventPath = childEvent.getPath();
        Name eventName = eventPath.getName();
        HierarchyEntry child = lookupEntry(eventId, eventPath);


        switch (childEvent.getType()) {
            case Event.NODE_ADDED:
            case Event.PROPERTY_ADDED:
                if (child == null || child.getStatus() == Status.REMOVED) {
                    // no such child or a colliding new child existed but got
                    // removed already -> add the new entry.
                    if (childEvent.getType() ==  Event.NODE_ADDED) {
                        String uniqueChildID = (eventId.getPath() == null) ? eventId.getUniqueID() : null;
                        int index = eventPath.getNormalizedIndex();
                        internalAddNodeEntry(eventName, uniqueChildID, index);
                    } else {
                        internalAddPropertyEntry(eventName, true);
                    }

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    /**
     * @see javax.jcr.observation.Event#getIdentifier()
     */
    public String getIdentifier() throws RepositoryException {
        ItemId itemId = event.getItemId();
        if (itemId == null) {
            return null;
        } else {
            NodeId nodeId = (itemId.denotesNode()) ? (NodeId) itemId : ((PropertyId) itemId).getParentId();
            return idFactory.toJcrIdentifier(nodeId);
        }
    }

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        Path parent = p.getAncestor(1);
        int type = e.getType();


        NodeId parentId = idFactory.createNodeId((String) null, parent);
        String identifier = e.getIdentifier();
        ItemId itemId;
        Node node = null;
        if (identifier != null) {
            itemId = idFactory.fromJcrIdentifier(e.getIdentifier());
            try {
                node = session.getItem(e.getPath()).getParent();

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            Path path = itemId.getPath();
            String uniqueID = itemId.getUniqueID();


            // resolver uuid part
            if (uniqueID != null) {
                ItemId uuidId = (path == null) ? itemId : service.getIdFactory().createNodeId(uniqueID);
                if (path != null && cache.containsItemId(uuidId)) {
                    // append uri of parent node, that is already cached
                    uriBuffer.append(cache.getUri(uuidId));
                } else {
                    // try to request locate-by-uuid report to build the uri

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    PropertyId buildPropertyId(NodeId parentId, MultiStatusResponse response,
                               String workspaceName, NamePathResolver resolver) throws RepositoryException {
        IdURICache cache = getCache(workspaceName);
        if (cache.containsUri(response.getHref())) {
            ItemId id = cache.getItemId(response.getHref());
            if (!id.denotesNode()) {
                return (PropertyId) id;
            }
        }


        try {

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     */
    public NodeId getNodeId(String uri, SessionInfo sessionInfo) throws RepositoryException {
        IdURICache cache = getCache(sessionInfo.getWorkspaceName());
        if (cache.containsUri(uri)) {
            // id has been accessed before and is cached
            ItemId id = cache.getItemId(uri);
            if (id.denotesNode()) {
                return (NodeId) id;
            }
        }


        // retrieve parentId from cache or by recursive calls

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     * @inheritDoc
     */
    public PropertyId getPropertyId(String uri, SessionInfo sessionInfo) throws RepositoryException {
        IdURICache cache = getCache(sessionInfo.getWorkspaceName());
        if (cache.containsUri(uri)) {
            ItemId id = cache.getItemId(uri);
            if (!id.denotesNode()) {
                return (PropertyId) id;
            }
        }


        // separate parent uri and property JCRName

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                // should not occur
                log.error("Internal error while building Event", e.getMessage());
                continue;
            }


            ItemId eventId = null;
            try {
                if (type == Event.NODE_ADDED || type == Event.NODE_REMOVED) {
                    eventId = uriResolver.getNodeId(href, sessionInfo);
                } else {
                    eventId = uriResolver.getPropertyId(href, sessionInfo);

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            String href = DomUtil.getChildTextTrim(evElem, XML_HREF, NAMESPACE);


            int type = EventUtil.getJcrEventType(et[0].getName());
            Path eventPath = null;
            ItemId eventId = null;
            NodeId parentId = null;


            if (href != null) {
                href = resolve(baseUri, href);
                try {

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        log.debug("Added: ItemId = " + itemId + " URI = " + cleanUri);
    }


    public void remove(String uri) {
        String cleanUri = getCleanUri(uri);
        ItemId itemId = uriToIdCache.remove(cleanUri);
        if (itemId != null) {
            idToUriCache.remove(itemId);
        }
        log.debug("Removed: ItemId = " + itemId + " URI = " + cleanUri);
    }

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