HierarchyContext.java

/*
 * Copyright (C) 2011 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.portal.tree.diff;

/**
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 */
public class HierarchyContext<L, N, H> {

    /** . */
    final ListAdapter<L, H> listAdapter;

    /** . */
    final HierarchyAdapter<L, N, H> hierarchyAdapter;

    /** . */
    final N root;

    public HierarchyContext(ListAdapter<L, H> listAdapter, HierarchyAdapter<L, N, H> hierarchyAdapter, N root)
            throws NullPointerException {
        if (listAdapter == null) {
            throw new NullPointerException();
        }
        if (hierarchyAdapter == null) {
            throw new NullPointerException();
        }
        if (root == null) {
            throw new NullPointerException();
        }

        //
        this.listAdapter = listAdapter;
        this.hierarchyAdapter = hierarchyAdapter;
        this.root = root;
    }

    public HierarchyAdapter<L, N, H> getHierarchyAdapter() {
        return hierarchyAdapter;
    }

    public N getRoot() {
        return root;
    }

    public N findByHandle(H handle) {
        return hierarchyAdapter.getDescendant(root, handle);
    }
}