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/**
 * This work is protected under copyrights held by the members of the
 * TOOP Project Consortium as indicated at
 * http://wiki.ds.unipi.gr/display/TOOP/Contributors
 * (c) 2018-2021. All rights reserved.
 *
 * This work is dual licensed under Apache License, Version 2.0
 * and the EUPL 1.2.
 *
 *  = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
 *
 * 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.
 *
 *  = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
 *
 * Licensed under the EUPL, Version 1.2 or – as soon they will be approved
 * by the European Commission - subsequent versions of the EUPL
 * (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 *
 *         https://joinup.ec.europa.eu/software/page/eupl
 */
package eu.toop.edm.xml;

import java.util.function.Function;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.xml.transform.Source;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Node;

import com.helger.commons.ValueEnforcer;
import com.helger.commons.debug.GlobalDebug;
import com.helger.jaxb.IJAXBReader;

/**
 * Default implementation of {@link IJAXBVersatileReader}
 *
 * @author Philip Helger
 * @param 
 *        internal JAXB type
 * @param 
 *        Outside data type to be read
 */
public class JAXBVersatileReader  implements IJAXBVersatileReader 
{
  private static final Logger LOGGER = LoggerFactory.getLogger (JAXBVersatileReader.class);

  private final IJAXBReader  m_aReader;
  private final Function  m_aMapper;

  public JAXBVersatileReader (@Nonnull final IJAXBReader  aReader, @Nonnull final Function  aMapper)
  {
    ValueEnforcer.notNull (aReader, "Reader");
    ValueEnforcer.notNull (aMapper, "Mapper");
    m_aReader = aReader;
    m_aMapper = aMapper;
  }

  @Nullable
  private T _read (@Nonnull final JAXBTYPE aObj)
  {
    try
    {
      return m_aMapper.apply (aObj);
    }
    catch (final RuntimeException ex)
    {
      if (GlobalDebug.isDebugMode ())
        LOGGER.warn ("Error mapping the read XML (" + aObj + ") to the target type", ex);
      return null;
    }
  }

  @Nullable
  public T read (@Nonnull final Source aSource)
  {
    final JAXBTYPE aObj = m_aReader.read (aSource);
    return aObj == null ? null : _read (aObj);
  }

  @Nullable
  public T read (@Nonnull final Node aNode)
  {
    final JAXBTYPE aObj = m_aReader.read (aNode);
    return aObj == null ? null : _read (aObj);
  }
}