jr3 MicroKernel read operations based on the Tree interface

MicroKernelImpl.java

public class MicroKernelImpl implements MicroKernel {

    public boolean nodeExists(String path, String revisionId) 
            throws MicroKernelException {
        Tree tree = getTree(revisionId);
        for (String name : splitPathToElements(path)) {
            if (tree == null) {
                return false;
            }
            tree = tree.get(name);
        }
        return tree != null && !tree.isLeaf();
    }

    public String getNodes(String path, String revisionId)
            throws MicroKernelException {
        return getNodes(path, revisionId, 1, 0, -1);
    }

    public String getNodes(
            String path, String revisionId, int depth, long offset, int count)
            throws MicroKernelException {
        Tree tree = getTree(revisionId);
        for (String name : splitPathToElements(path)) {
            if (tree == null) {
                throw new MicroKernelException("Path not found: " + path);
            }
            tree = tree.get(name);
        }
        if (tree != null && !tree.isLeaf()) {
            return serializeToJson(tree, depth, offset, count);
        } else {
            throw new MicroKernelException("Path not found: " + path);
        }
    }

}