/*
    * 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.maven.archetype.source;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.Reader;
  import java.io.Writer;
  
  import org.apache.maven.archetype.catalog.ArchetypeCatalog;
  import org.apache.maven.archetype.catalog.io.xpp3.ArchetypeCatalogXpp3Reader;
  import org.apache.maven.archetype.catalog.io.xpp3.ArchetypeCatalogXpp3Writer;
  import org.codehaus.plexus.util.xml.XmlStreamWriter;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Jason van Zyl
   */
  public abstract class CatalogArchetypeDataSource implements ArchetypeDataSource {
      private static final Logger LOGGER = LoggerFactory.getLogger(CatalogArchetypeDataSource.class);
  
      protected void writeLocalCatalog(ArchetypeCatalog catalog, File catalogFile) throws ArchetypeDataSourceException {
          try (Writer writer = new XmlStreamWriter(catalogFile)) {
              ArchetypeCatalogXpp3Writer catalogWriter = new ArchetypeCatalogXpp3Writer();
  
              catalogWriter.write(writer, catalog);
          } catch (IOException e) {
              throw new ArchetypeDataSourceException("Error writing archetype catalog.", e);
          }
      }
  
      protected ArchetypeCatalog readCatalog(Reader reader) throws ArchetypeDataSourceException {
          try (Reader catReader = reader) {
              ArchetypeCatalogXpp3Reader catalogReader = new ArchetypeCatalogXpp3Reader();
  
              return catalogReader.read(catReader);
          } catch (IOException e) {
              throw new ArchetypeDataSourceException("Error reading archetype catalog.", e);
          } catch (XmlPullParserException e) {
              throw new ArchetypeDataSourceException("Error parsing archetype catalog.", e);
          }
      }
  }