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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.scm.command;
20  
21  import org.apache.maven.scm.CommandParameters;
22  import org.apache.maven.scm.ScmException;
23  import org.apache.maven.scm.ScmFileSet;
24  import org.apache.maven.scm.ScmResult;
25  import org.apache.maven.scm.provider.ScmProviderRepository;
26  import org.slf4j.Logger;
27  import org.slf4j.LoggerFactory;
28  
29  /**
30   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
31   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
32   *
33   */
34  public abstract class AbstractCommand implements Command {
35      protected Logger logger = LoggerFactory.getLogger(getClass());
36  
37      protected abstract ScmResult executeCommand(
38              ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters parameters) throws ScmException;
39  
40      /** {@inheritDoc} */
41      public final ScmResult execute(ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters parameters)
42              throws ScmException {
43          if (repository == null) {
44              throw new NullPointerException("repository cannot be null");
45          }
46  
47          if (fileSet == null) {
48              throw new NullPointerException("fileSet cannot be null");
49          }
50  
51          try {
52              return executeCommand(repository, fileSet, parameters);
53          } catch (Exception ex) {
54              throw new ScmException("Exception while executing SCM command.", ex);
55          }
56      }
57  }