package org.apache.maven.plugin;
   
   /*
    * 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 org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
  import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
  import org.codehaus.plexus.compiler.util.scan.StaleSourceScanner;
  
  import java.io.File;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * Compiles application test sources.
   *
   * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
   * @version $Id: TestCompilerMojo.html 816619 2012-05-08 13:09:26Z hboutemy $
   * @since 2.0
   * @goal testCompile
   * @phase test-compile
   * @threadSafe
   * @requiresDependencyResolution test
   */
  public class TestCompilerMojo
      extends AbstractCompilerMojo
  {
      /**
       * Set this to 'true' to bypass compilation of test sources.
       * Its use is NOT RECOMMENDED, but quite convenient on occasion.
       *
       * @parameter expression="${maven.test.skip}"
       */
      private boolean skip;
  
      /**
       * The source directories containing the test-source to be compiled.
       *
       * @parameter default-value="${project.testCompileSourceRoots}"
       * @required
       * @readonly
       */
      private List<String> compileSourceRoots;
  
      /**
       * Project test classpath.
       *
       * @parameter default-value="${project.testClasspathElements}"
       * @required
       * @readonly
       */
      private List<String> classpathElements;
  
      /**
       * The directory where compiled test classes go.
       *
       * @parameter default-value="${project.build.testOutputDirectory}"
       * @required
       * @readonly
       */
      private File outputDirectory;
  
      /**
       * A list of inclusion filters for the compiler.
       *
       * @parameter
       */
      private Set<String> testIncludes = new HashSet<String>();
  
      /**
       * A list of exclusion filters for the compiler.
       *
       * @parameter
       */
      private Set<String> testExcludes = new HashSet<String>();
  
      /**
       * The -source argument for the test Java compiler.
       *
       * @parameter expression="${maven.compiler.testSource}"
      * @since 2.1
      */
     private String testSource;
 
     /**
      * The -target argument for the test Java compiler.
      *
      * @parameter expression="${maven.compiler.testTarget}"
      * @since 2.1
      */
     private String testTarget;
 
 
     /**
      * <p>
      * Sets the arguments to be passed to test compiler (prepending a dash) if fork is set to true.
      * </p>
      * <p>
      * This is because the list of valid arguments passed to a Java compiler
      * varies based on the compiler version.
      * </p>
      *
      * @parameter
      * @since 2.1
      */
     private Map<String, String> testCompilerArguments;
 
     /**
      * <p>
      * Sets the unformatted argument string to be passed to test compiler if fork is set to true.
      * </p>
      * <p>
      * This is because the list of valid arguments passed to a Java compiler
      * varies based on the compiler version.
      * </p>
      *
      * @parameter
      * @since 2.1
      */
     private String testCompilerArgument;
 
     /**
      * <p>
      * Specify where to place generated source files created by annotation processing.
      * Only applies to JDK 1.6+
      * </p>
      * @parameter default-value="${project.build.directory}/generated-test-sources/test-annotations"
      * @since 2.2
      */
     private File generatedTestSourcesDirectory;
 
 
     public void execute()
         throws MojoExecutionException, CompilationFailureException
     {
         if ( skip )
         {
             getLog().info( "Not compiling test sources" );
         }
         else
         {
             super.execute();
         }
     }
 
     protected List<String> getCompileSourceRoots()
     {
         return compileSourceRoots;
     }
 
     protected List<String> getClasspathElements()
     {
         return classpathElements;
     }
 
     protected File getOutputDirectory()
     {
         return outputDirectory;
     }
 
     protected SourceInclusionScanner getSourceInclusionScanner( int staleMillis )
     {
         SourceInclusionScanner scanner = null;
 
         if ( testIncludes.isEmpty() && testExcludes.isEmpty() )
         {
             scanner = new StaleSourceScanner( staleMillis );
         }
         else
         {
             if ( testIncludes.isEmpty() )
             {
                 testIncludes.add( "**/*.java" );
             }
             scanner = new StaleSourceScanner( staleMillis, testIncludes, testExcludes );
         }
 
         return scanner;
     }
 
     protected SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding )
     {
         SourceInclusionScanner scanner = null;
 
         if ( testIncludes.isEmpty() && testExcludes.isEmpty() )
         {
             testIncludes = Collections.singleton( "**/*." + inputFileEnding );
             scanner = new SimpleSourceInclusionScanner( testIncludes, Collections.EMPTY_SET );
         }
         else
         {
             if ( testIncludes.isEmpty() )
             {
                 testIncludes.add( "**/*." + inputFileEnding );
             }
             scanner = new SimpleSourceInclusionScanner( testIncludes, testExcludes );
         }
 
         return scanner;
     }
 
     protected String getSource()
     {
       return testSource == null ? source : testSource;
     }
 
     protected String getTarget()
     {
       return testTarget == null ? target : testTarget;
     }
 
     protected String getCompilerArgument()
     {
       return testCompilerArgument == null ? compilerArgument : testCompilerArgument;
     }
 
     protected Map<String, String> getCompilerArguments()
     {
       return testCompilerArguments == null ? compilerArguments : testCompilerArguments;
     }
 
     protected File getGeneratedSourcesDirectory() 
     {
         return generatedTestSourcesDirectory;
     }
 
 }