Package org.apache.sling.query.resource.jcr

Source Code of org.apache.sling.query.resource.jcr.SessionJcrTypeResolver

/*-
* 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.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;
    }
  }

}
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