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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.archetype.source;
20  
21  import java.io.File;
22  import java.io.IOException;
23  import java.io.Reader;
24  import java.io.Writer;
25  
26  import org.apache.maven.archetype.catalog.ArchetypeCatalog;
27  import org.apache.maven.archetype.catalog.io.xpp3.ArchetypeCatalogXpp3Reader;
28  import org.apache.maven.archetype.catalog.io.xpp3.ArchetypeCatalogXpp3Writer;
29  import org.codehaus.plexus.util.xml.XmlStreamWriter;
30  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
31  import org.slf4j.Logger;
32  import org.slf4j.LoggerFactory;
33  
34  /**
35   * @author Jason van Zyl
36   */
37  public abstract class CatalogArchetypeDataSource implements ArchetypeDataSource {
38      private static final Logger LOGGER = LoggerFactory.getLogger(CatalogArchetypeDataSource.class);
39  
40      protected void writeLocalCatalog(ArchetypeCatalog catalog, File catalogFile) throws ArchetypeDataSourceException {
41          try (Writer writer = new XmlStreamWriter(catalogFile)) {
42              ArchetypeCatalogXpp3Writer catalogWriter = new ArchetypeCatalogXpp3Writer();
43  
44              catalogWriter.write(writer, catalog);
45          } catch (IOException e) {
46              throw new ArchetypeDataSourceException("Error writing archetype catalog.", e);
47          }
48      }
49  
50      protected ArchetypeCatalog readCatalog(Reader reader) throws ArchetypeDataSourceException {
51          try (Reader catReader = reader) {
52              ArchetypeCatalogXpp3Reader catalogReader = new ArchetypeCatalogXpp3Reader();
53  
54              return catalogReader.read(catReader);
55          } catch (IOException e) {
56              throw new ArchetypeDataSourceException("Error reading archetype catalog.", e);
57          } catch (XmlPullParserException e) {
58              throw new ArchetypeDataSourceException("Error parsing archetype catalog.", e);
59          }
60      }
61  }