/*
* 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.mop.navigation;
/**
* A visitor implementation that federates a scope along with a federation root.
*
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
*/
class FederatingVisitor<N> implements Scope.Visitor {
/** . */
private final Scope.Visitor visitor;
/** . */
private final NodeContext<N> federationRoot;
/** . */
private final int federationDepth;
/** . */
private final Scope federatedScope;
/** . */
private Scope.Visitor federated;
FederatingVisitor(Scope.Visitor visitor, NodeContext<N> federationRoot, Scope federatedScope) {
this.visitor = visitor;
this.federationRoot = federationRoot;
this.federatedScope = federatedScope;
this.federated = null;
this.federationDepth = federationRoot.getDepth(federationRoot.tree.root);
}
public VisitMode enter(int depth, String id, String name, NodeState state) {
if (federationRoot.handle.equals(id)) {
federated = federatedScope.get();
}
//
VisitMode visit;
if (federated != null) {
visit = federated.enter(depth - federationDepth, id, name, state);
} else {
visit = VisitMode.NO_CHILDREN;
}
// Override
VisitMode override = visitor.enter(depth, id, name, state);
if (override == VisitMode.ALL_CHILDREN) {
visit = VisitMode.ALL_CHILDREN;
}
//
return visit;
}
public void leave(int depth, String id, String name, NodeState state) {
if (federationRoot.handle.equals(id)) {
federated = null;
}
//
if (federated != null) {
federated.leave(depth - federationDepth, id, name, state);
}
}
}