src/main/java/org/apache/sling/query/impl/resource/jcr/SessionJcrTypeResolver.java

/*-
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.sling.query.impl.resource.jcr;

import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.nodetype.NoSuchNodeTypeException;
import javax.jcr.nodetype.NodeTypeManager;

import org.apache.sling.api.resource.ResourceResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SessionJcrTypeResolver implements JcrTypeResolver {

    private static final Logger LOG = LoggerFactory.getLogger(SessionJcrTypeResolver.class);

    private final NodeTypeManager nodeTypeManager;

    public SessionJcrTypeResolver(ResourceResolver resolver) {
        NodeTypeManager m = null;
        try {
            if (resolver != null) {
                m = resolver.adaptTo(Session.class).getWorkspace().getNodeTypeManager();
            }
        } catch (RepositoryException e) {
            LOG.error("Can't get node type manager", e);
            m = null;
        }
        nodeTypeManager = m;
    }

    @Override
    public boolean isJcrType(String name) {
        if (nodeTypeManager == null) {
            return false;
        }
        if (name == null || name.contains("/")) {
            return false;
        }
        try {
            nodeTypeManager.getNodeType(name);
            return true;
        } catch (NoSuchNodeTypeException e) {
            return false;
        } catch (RepositoryException e) {
            LOG.error("Can't check node type " + name, e);
            return false;
        }
    }

    @Override
    public boolean isSubtype(String supertype, String subtype) {
        if (nodeTypeManager == null) {
            return false;
        }
        if (!isJcrType(subtype) || !isJcrType(supertype)) {
            return false;
        }
        try {
            return nodeTypeManager.getNodeType(subtype).isNodeType(supertype);
        } catch (RepositoryException e) {
            LOG.error("Can't compare two node types: " + subtype + " and " + supertype, e);
            return false;
        }
    }

}