/*

  * 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.

  */

 package org.apache.maven.shared.tools.easymock;

 import java.io.File;

 import java.io.FileReader;

 import java.io.FileWriter;

 import java.io.IOException;

 import java.io.StringReader;

 import java.io.StringWriter;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import junit.framework.Assert;

 import org.codehaus.plexus.util.FileUtils;

 import org.codehaus.plexus.util.IOUtil;

 public class TestFileManager

 {

     public static final String TEMP_DIR_PATH = System.getProperty( "java.io.tmpdir" );

     private List filesToDelete = new ArrayList();

     private final String baseFilename;

     private final String fileSuffix;

     private StackTraceElement callerInfo;

     private Thread cleanupWarning;

     private boolean warnAboutCleanup = false;

     public TestFileManager( String baseFilename, String fileSuffix )

     {

         this.baseFilename = baseFilename;

         this.fileSuffix = fileSuffix;

         initializeCleanupMonitoring();

     }

     private void initializeCleanupMonitoring()

     {

         callerInfo = new NullPointerException().getStackTrace()[2];

         Runnable warning = new Runnable()

         {

             public void run()

             {

                 maybeWarnAboutCleanUp();

             }

         };

         cleanupWarning = new Thread( warning );

         Runtime.getRuntime().addShutdownHook( cleanupWarning );

     }

     private void maybeWarnAboutCleanUp()

     {

         if ( warnAboutCleanup )

         {

             System.out.println( "[WARNING] TestFileManager from: " + callerInfo.getClassName() + " not cleaned up!" );

         }

     }

     public void markForDeletion( File toDelete )

     {

         filesToDelete.add( toDelete );

         warnAboutCleanup = true;

     }

     public synchronized File createTempDir()

     {

         try

         {

             Thread.sleep( 20 );

         }

         catch ( InterruptedException e )

         {

         }

         File dir = new File( TEMP_DIR_PATH, baseFilename + System.currentTimeMillis() );

         dir.mkdirs();

         markForDeletion( dir );

         return dir;

     }

     public synchronized File createTempFile()

         throws IOException

     {

         File tempFile = File.createTempFile( baseFilename, fileSuffix );

         tempFile.deleteOnExit();

         markForDeletion( tempFile );

         return tempFile;

     }

     public void cleanUp()

         throws IOException

     {

         for ( Iterator it = filesToDelete.iterator(); it.hasNext(); )

         {

             File file = (File) it.next();

             if ( file.exists() )

             {

                 if ( file.isDirectory() )

                 {

                     FileUtils.deleteDirectory( file );

                 }

                 else

                 {

                     file.delete();

                 }

             }

             it.remove();

         }

         warnAboutCleanup = false;

     }

     public void assertFileExistence( File dir, String filename, boolean shouldExist )

     {

         File file = new File( dir, filename );

         if ( shouldExist )

         {

             Assert.assertTrue( file.exists() );

         }

         else

         {

             Assert.assertFalse( file.exists() );

         }

     }

     public void assertFileContents( File dir, String filename, String contentsTest )

         throws IOException

     {

         assertFileExistence( dir, filename, true );

         File file = new File( dir, filename );

         FileReader reader = null;

         StringWriter writer = new StringWriter();

         try

         {

             reader = new FileReader( file );

             IOUtil.copy( reader, writer );

         }

         finally

         {

             IOUtil.close( reader );

         }

         Assert.assertEquals( contentsTest, writer.toString() );

     }

     public File createFile( File dir, String filename, String contents )

         throws IOException

     {

         File file = new File( dir, filename );

         file.getParentFile().mkdirs();

         FileWriter writer = null;

         try

         {

             writer = new FileWriter( file );

             IOUtil.copy( new StringReader( contents ), writer );

         }

         finally

         {

             IOUtil.close( writer );

         }

         markForDeletion( file );

         return file;

     }

     public String getFileContents( File file )

         throws IOException

     {

         String result = null;

         FileReader reader = null;

         try

         {

             reader = new FileReader( file );

             StringWriter writer = new StringWriter();

             IOUtil.copy( reader, writer );

             result = writer.toString();

         }

         finally

         {

             IOUtil.close( reader );

         }

         return result;

     }

     protected void finalize()

         throws Throwable

     {

         maybeWarnAboutCleanUp();

         super.finalize();

     }

     public File createFile( String filename, String content )

         throws IOException

     {

         File dir = createTempDir();

         return createFile( dir, filename, content );

     }

 }