/*
 * Copyright 2005 Ralf Joachim
 *
 * Licensed 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.castor.mapping;

import org.exolab.castor.mapping.xml.ClassMapping;
import org.exolab.castor.mapping.xml.MappingRoot;
import org.exolab.castor.xml.IDResolver;

/**
 * An IDResolver to allow us to resolve ClassMappings from included Mapping files.
 * 
 * @author <a href="mailto:ralf DOT joachim AT syscon DOT eu">Ralf Joachim</a>
 * @version $Revision: 5951 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
 */
public final class MappingUnmarshallIDResolver implements IDResolver {
  private MappingRoot _mapping = null;

  public MappingUnmarshallIDResolver() {
    super();
  }

  public void setMapping(final MappingRoot mapping) {
    _mapping = mapping;
  }

  /**
   * Returns the Object whose id matches the given IDREF, or null if no Object was found.
   * 
   * @param idref the IDREF to resolve.
   * @return the Object whose id matches the given IDREF.
   * @see org.exolab.castor.xml.IDResolver#resolve(java.lang.String)
   */
  public Object resolve(final String idref) {
    if (_mapping == null) {
      return null;
    }
    for (int i = 0; i < _mapping.getClassMappingCount(); i++) {
      ClassMapping clsMap = _mapping.getClassMapping(i);
      if (idref.equals(clsMap.getName())) {
        return clsMap;
      }
    }
    return null;
  }
}
