/**
    * Copyright 2004-2011 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.
   */
  package org.kuali.maven.mojo;
  
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.MojoFailureException;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.settings.Settings;
  
  /**
   * Mojo essentials. Contains the "skip" logic that is the de facto standard for maven plugins. Contains a number of
   * maven related properties that are common to most mojos.
   */
  public abstract class BaseMojo extends AbstractMojo {
      public static final String FS = System.getProperty("file.separator");
      public static final String SKIP_PACKAGING_TYPE = "pom";
  
      /**
       * When <code>true</code>, skip the execution of this mojo
       *
       * @parameter default-value="false"
       */
      private boolean skip;
  
      /**
       * Setting this parameter to <code>true</code> will force the execution of this mojo, even if it would get skipped
       * usually.
       *
       * @parameter expression="${forceMojoExecution}" default-value="false"
       * @required
       */
      private boolean forceMojoExecution;
  
      /**
       * The encoding to use when reading/writing files. If not specified this defaults to the platform specific encoding
       * of whatever machine the build is running on.
       *
       * @parameter expression="${encoding}" default-value="${project.build.sourceEncoding}"
       */
      private String encoding;
  
      /**
       * The Maven project this plugin runs in.
       *
       * @parameter expression="${project}"
       * @required
       * @readonly
       */
      private MavenProject project;
  
      /**
       * @parameter expression="${settings}"
       * @required
       * @since 1.0
       * @readonly
       */
      private Settings settings;
  
      /**
       * @parameter default-value="${session}"
       * @required
       * @readonly
       */
      private MavenSession mavenSession;
  
      protected void beforeExecution() throws MojoExecutionException, MojoFailureException {
      }
  
      protected void afterExecution() throws MojoExecutionException, MojoFailureException {
      }
  
      @Override
      public void execute() throws MojoExecutionException, MojoFailureException {
          beforeExecution();
          if (skipMojo()) {
              return;
          }
          executeMojo();
          afterExecution();
      }
  
      protected abstract void executeMojo() throws MojoExecutionException, MojoFailureException;
  
      /**
      * <p>
      * Determine if the mojo execution should get skipped.
      * </p>
      * This is the case if:
      * <ul>
      * <li>{@link #skip} is <code>true</code></li>
      * <li>if the mojo gets executed on a project with packaging type 'pom' and {@link #forceMojoExecution} is
      * <code>false</code></li>
      * </ul>
      *
      * @return <code>true</code> if the mojo execution should be skipped.
      */
     protected boolean skipMojo() {
         if (skip) {
             getLog().info("Skipping execution");
             return true;
         }
 
         if (!forceMojoExecution && project != null && SKIP_PACKAGING_TYPE.equals(project.getPackaging())) {
             getLog().info("Skipping execution for project with packaging type '" + SKIP_PACKAGING_TYPE + "'");
             return true;
         }
 
         return false;
     }
 
     /**
      * Returns the maven project.
      *
      * @return The maven project where this plugin runs in.
      */
     public MavenProject getProject() {
         return project;
     }
 
     public String getEncoding() {
         return encoding;
     }
 
     public void setEncoding(final String encoding) {
         this.encoding = encoding;
     }
 
     public boolean isSkip() {
         return skip;
     }
 
     public void setSkip(final boolean skip) {
         this.skip = skip;
     }
 
     public boolean isForceMojoExecution() {
         return forceMojoExecution;
     }
 
     public void setForceMojoExecution(final boolean forceMojoExecution) {
         this.forceMojoExecution = forceMojoExecution;
     }
 
     public Settings getSettings() {
         return settings;
     }
 
     public void setSettings(final Settings settings) {
         this.settings = settings;
     }
 
     public MavenSession getMavenSession() {
         return mavenSession;
     }
 
     public void setMavenSession(final MavenSession mavenSession) {
         this.mavenSession = mavenSession;
     }
 
     public void setProject(final MavenProject project) {
         this.project = project;
     }
 }