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1   package org.apache.maven.plugin.invoker;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.io.File;
23  import java.io.IOException;
24  import java.io.Reader;
25  
26  import org.apache.maven.model.Model;
27  import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
28  import org.apache.maven.plugin.MojoExecutionException;
29  import org.codehaus.plexus.util.IOUtil;
30  import org.codehaus.plexus.util.ReaderFactory;
31  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
32  
33  /**
34   * Provides utility methods for POM processing.
35   * 
36   * @author Benjamin Bentmann
37   */
38  class PomUtils
39  {
40  
41      /**
42       * Loads the (raw) model from the specified POM file.
43       * 
44       * @param pomFile The path to the POM file to load, must not be <code>null</code>.
45       * @return The raw model, never <code>null</code>.
46       * @throws MojoExecutionException If the POM file could not be loaded.
47       */
48      public static Model loadPom( File pomFile )
49          throws MojoExecutionException
50      {
51          Reader reader = null;
52          try
53          {
54              reader = ReaderFactory.newXmlReader( pomFile );
55              return new MavenXpp3Reader().read( reader, false );
56          }
57          catch ( XmlPullParserException e )
58          {
59              throw new MojoExecutionException( "Failed to parse POM: " + pomFile, e );
60          }
61          catch ( IOException e )
62          {
63              throw new MojoExecutionException( "Failed to read POM: " + pomFile, e );
64          }
65          finally
66          {
67              IOUtil.close( reader );
68          }
69      }
70  
71  }