MyMojo.java

package jar;

/*
 * Copyright 2001-2005 The Apache Software Foundation.
 *
 * Licensed 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.
 */

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;

/**
 * @goal run
 */
public class MyMojo
    extends AbstractMojo
{
    /**
     * Location of the file.
     * @parameter expression="${project}"
     * @required
     * @readonly
     */
    private MavenProject project;

    public void execute()
        throws MojoExecutionException
    {
        String parentBuildDir = project.getParent().getBuild().getDirectory();
        
        getLog().info( "parent build dir is: " + parentBuildDir );
        
        if ( parentBuildDir.indexOf( "${" ) > -1 )
        {
            throw new MojoExecutionException( "Parent-project's build dir is not interpolated." );
        }
    }
}