001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.maven.scm.command;
020
021import org.apache.maven.scm.CommandParameters;
022import org.apache.maven.scm.ScmException;
023import org.apache.maven.scm.ScmFileSet;
024import org.apache.maven.scm.ScmResult;
025import org.apache.maven.scm.provider.ScmProviderRepository;
026import org.slf4j.Logger;
027import org.slf4j.LoggerFactory;
028
029/**
030 * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
031 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
032 *
033 */
034public abstract class AbstractCommand implements Command {
035    protected Logger logger = LoggerFactory.getLogger(getClass());
036
037    protected abstract ScmResult executeCommand(
038            ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters parameters) throws ScmException;
039
040    /** {@inheritDoc} */
041    public final ScmResult execute(ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters parameters)
042            throws ScmException {
043        if (repository == null) {
044            throw new NullPointerException("repository cannot be null");
045        }
046
047        if (fileSet == null) {
048            throw new NullPointerException("fileSet cannot be null");
049        }
050
051        try {
052            return executeCommand(repository, fileSet, parameters);
053        } catch (Exception ex) {
054            throw new ScmException("Exception while executing SCM command.", ex);
055        }
056    }
057}