AbstractExecMojo.java

package org.codehaus.mojo.exec;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 java.io.File;
import java.util.List;

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.util.cli.CommandLineUtils;

/**
 * This class is used for unifying functionality between the 2 mojo exec plugins ('java' and 'exec'). It handles parsing
 * the arguments and adding source/test folders.
 * 
 * @author Philippe Jacot (PJA)
 * @author Jerome Lacoste
 */
public abstract class AbstractExecMojo
    extends AbstractMojo
{
    /**
     * The enclosing project.
     * 
     * @parameter default-value="${project}"
     * @required
     * @readonly
     */
    protected MavenProject project;

    /**
     * This folder is added to the list of those folders containing source to be compiled. Use this if your plugin
     * generates source code.
     * 
     * @parameter expression="${sourceRoot}"
     */
    private File sourceRoot;

    /**
     * This folder is added to the list of those folders containing source to be compiled for testing. Use this if your
     * plugin generates test source code.
     * 
     * @parameter expression="${testSourceRoot}"
     */
    private File testSourceRoot;

    /**
     * Arguments for the executed program
     * 
     * @parameter expression="${exec.args}"
     */
    private String commandlineArgs;

    /**
     * Defines the scope of the classpath passed to the plugin. Set to compile,test,runtime or system depending on your
     * needs. Since 1.1.2, the default value is 'runtime' instead of 'compile'.
     * 
     * @parameter expression="${exec.classpathScope}" default-value="runtime"
     */
    protected String classpathScope;

    /**
     * Skip the execution.
     * 
     * @parameter expression="${skip}" default-value="false"
     * @since 1.0.1
     */
    private boolean skip;

    /**
     * Collects the project artifacts in the specified List and the project specific classpath (build output and build
     * test output) Files in the specified List, depending on the plugin classpathScope value.
     * 
     * @param artifacts the list where to collect the scope specific artifacts
     * @param theClasspathFiles the list where to collect the scope specific output directories
     */
    protected void collectProjectArtifactsAndClasspath( List artifacts, List theClasspathFiles )
    {

        if ( "compile".equals( classpathScope ) )
        {
            artifacts.addAll( project.getCompileArtifacts() );
            theClasspathFiles.add( new File( project.getBuild().getOutputDirectory() ) );
        }
        else if ( "test".equals( classpathScope ) )
        {
            artifacts.addAll( project.getTestArtifacts() );
            theClasspathFiles.add( new File( project.getBuild().getTestOutputDirectory() ) );
            theClasspathFiles.add( new File( project.getBuild().getOutputDirectory() ) );
        }
        else if ( "runtime".equals( classpathScope ) )
        {
            artifacts.addAll( project.getRuntimeArtifacts() );
            theClasspathFiles.add( new File( project.getBuild().getOutputDirectory() ) );
        }
        else if ( "system".equals( classpathScope ) )
        {
            artifacts.addAll( project.getSystemArtifacts() );
        }
        else
        {
            throw new IllegalStateException( "Invalid classpath scope: " + classpathScope );
        }

        getLog().debug( "Collected project artifacts " + artifacts );
        getLog().debug( "Collected project classpath " + theClasspathFiles );
    }

    /**
     * Parses the argument string given by the user. Strings are recognized as everything between STRING_WRAPPER.
     * PARAMETER_DELIMITER is ignored inside a string. STRING_WRAPPER and PARAMETER_DELIMITER can be escaped using
     * ESCAPE_CHAR.
     * 
     * @return Array of String representing the arguments
     * @throws MojoExecutionException for wrong formatted arguments
     */
    protected String[] parseCommandlineArgs()
        throws MojoExecutionException
    {
        if ( commandlineArgs == null )
        {
            return null;
        }
        else
        {
            try
            {
                return CommandLineUtils.translateCommandline( commandlineArgs );
            }
            catch ( Exception e )
            {
                throw new MojoExecutionException( e.getMessage() );
            }
        }
    }

    /**
     * @return true of the mojo has command line arguments
     */
    protected boolean hasCommandlineArgs()
    {
        return ( commandlineArgs != null );
    }

    /**
     * Register compile and compile tests source roots if necessary
     */
    protected void registerSourceRoots()
    {
        if ( sourceRoot != null )
        {
            getLog().info( "Registering compile source root " + sourceRoot );
            project.addCompileSourceRoot( sourceRoot.toString() );
        }

        if ( testSourceRoot != null )
        {
            getLog().info( "Registering compile test source root " + testSourceRoot );
            project.addTestCompileSourceRoot( testSourceRoot.toString() );
        }
    }

    /**
     * Check if the execution should be skipped
     * 
     * @return true to skip
     */
    protected boolean isSkip()
    {
        return skip;
    }
}