/**
    * Copyright 2009-2012 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.codehaus.mojo.properties;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Find a GAV specific property value using GroupId+ArtifactId+Version. The logic goes from most specific to least
   * specific. If there is a value for the full GAV, that value is used. Otherwise, a value for GroupId + ArtifactId, or
   * finally just GroupId. If no value is found, the defaultValue is used.
   *
   * A new project property with .gav appended is set if a value is found.
   *
   * @goal get-gav-property
   */
  public class GetGAVProperty extends AbstractMojo {
  
      /**
       * @parameter default-value="${project}"
       * @required
       * @readonly
       */
      private MavenProject project;
  
      /**
       * @parameter expression="${properties.groupId}" default-value="${project.groupId}"
       */
      private String groupId;
  
      /**
       * @parameter expression="${properties.artifactId}" default-value="${project.artifactId}"
       */
      private String artifactId;
  
      /**
       * @parameter expression="${properties.version}" default-value="${project.version}"
       */
      private String version;
  
      /**
       * @parameter expression="${properties.property}"
       */
      private String property;
  
      /**
       * @parameter expression="${properties.defaultValue}"
       */
      private String defaultValue;
  
      /**
       * @parameter expression="${properties.suffix}" default-value="gav"
       */
      private String suffix;
  
      @Override
      public void execute() throws MojoExecutionException {
          List<String> keys = getKeys();
          String value = getValue(project, keys);
          if (StringUtils.isBlank(value)) {
              getLog().info("No value for '" + property + "'");
          } else {
              String key = property + "." + suffix;
              getLog().info("Setting " + key + "=" + value);
              project.getProperties().setProperty(key, value);
          }
      }
  
      protected String getValue(MavenProject project, List<String> keys) {
          for (String key : keys) {
              String value = getProperty(key);
              if (!StringUtils.isBlank(value)) {
                  return value;
              }
          }
          return defaultValue;
      }
  
      protected List<String> getKeys() {
          List<String> keys = new ArrayList<String>();
          keys.add(property + "." + groupId + "." + artifactId + "." + version);
         keys.add(property + "." + groupId + "." + artifactId);
         keys.add(property + "." + groupId);
         keys.add(property);
         return keys;
     }
 
     protected String getProperty(String key) {
         String sys = System.getProperty(key);
         String proj = project.getProperties().getProperty(key);
         if (!StringUtils.isBlank(sys)) {
             return sys;
         } else {
             return proj;
         }
 
     }
 
     public MavenProject getProject() {
         return project;
     }
 
     public String getGroupId() {
         return groupId;
     }
 
     public void setGroupId(String groupId) {
         this.groupId = groupId;
     }
 
     public String getArtifactId() {
         return artifactId;
     }
 
     public void setArtifactId(String artifactId) {
         this.artifactId = artifactId;
     }
 
     public String getVersion() {
         return version;
     }
 
     public void setVersion(String version) {
         this.version = version;
     }
 
     public String getProperty() {
         return property;
     }
 
     public void setProperty(String property) {
         this.property = property;
     }
 
     public String getDefaultValue() {
         return defaultValue;
     }
 
     public void setDefaultValue(String defaultValue) {
         this.defaultValue = defaultValue;
     }
 
     public void setProject(MavenProject project) {
         this.project = project;
     }
 
     public String getSuffix() {
         return suffix;
     }
 
     public void setSuffix(String suffix) {
         this.suffix = suffix;
     }
 
 }