NodeRetriever.java

package org.om.core.impl.persistence.jcr.util;

import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.RepositoryException;
import javax.jcr.Session;

/**
 * Retrieves nodes from a JCR session.
 * 
 * @author Jakob Külzer
 * 
 */
public class NodeRetriever {

	private final Session session;

	public NodeRetriever(Session session) {
		this.session = session;
	}

	/**
	 * Retrieves a {@link Node} with the given path. The path will always be
	 * resolved relative to the root node.
	 * 
	 * @param path
	 * @return
	 * @throws PathNotFoundException
	 * @throws RepositoryException
	 */
	public Node getNode(String path) throws PathNotFoundException, RepositoryException {
		return getNode(path, session.getRootNode());
	}

	/**
	 * Retrieves a {@link Node} relative to the given context node. However, if
	 * the given path denotes an absolute path, the node will be retrieved
	 * relative to the root node.
	 * 
	 * @param path
	 * @param context
	 * @return
	 * @throws PathNotFoundException
	 * @throws RepositoryException
	 */
	public Node getNode(String path, Node context) throws PathNotFoundException, RepositoryException {
		boolean absolutePath = path.startsWith("/");
		if (absolutePath) {
			context = session.getRootNode();
			path = path.substring(1);
		}

		return context.getNode(path);
	}

}