/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* 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.jboss.as.jmx.model;
import javax.management.ObjectName;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.registry.Resource;
import org.jboss.as.controller.registry.Resource.ResourceEntry;
class RootResourceIterator<T> {
private final ResourceAccessControlUtil accessControlUtil;
private final Resource rootResource;
private final ResourceAction<T> action;
RootResourceIterator(final ResourceAccessControlUtil accessControlUtil, final Resource rootResource, final ResourceAction<T> action) {
this.accessControlUtil = accessControlUtil;
this.rootResource = rootResource;
this.action = action;
}
T iterate() {
doIterate(rootResource, PathAddress.EMPTY_ADDRESS);
return action.getResult();
}
private void doIterate(final Resource current, final PathAddress address) {
boolean handleChildren = false;
ObjectName resourceObjectName = action.onAddress(address);
if (resourceObjectName != null && accessControlUtil.getResourceAccess(address, false).isAccessibleResource()) {
handleChildren = action.onResource(resourceObjectName);
}
if (handleChildren) {
for (String type : current.getChildTypes()) {
if (current.hasChildren(type)) {
for (ResourceEntry entry : current.getChildren(type)) {
final PathElement pathElement = entry.getPathElement();
final PathAddress childAddress = address.append(pathElement);
doIterate(entry, childAddress);
}
}
}
}
}
interface ResourceAction<T> {
/**
* An address has been identified that possibly should be applied to onResource.
* @param address the address
* @return an ObjectName representation of the address, or {@code null} if neither the address nor
* any of its children are interesting to this ResourceAction.
*/
ObjectName onAddress(PathAddress address);
/**
*
* @param resourceObjectName the ObjectName returned by onAddress.
* @return {@code true} if child resources are interesting to this ResourceAction.
*/
boolean onResource(ObjectName resourceObjectName);
/**
* Gets the overall result after all resources have been processed.
* @return the result
*/
T getResult();
}
}