org.codehaus.mojo.license.utils.FileUtil Maven / Gradle / Ivy
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Maven plugin to download and collect license files from project dependencies.
package org.codehaus.mojo.license.utils;
/*
* #%L
* License Maven Plugin
* %%
* Copyright (C) 2010 - 2011 Codehaus
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import org.codehaus.plexus.util.FileUtils;
import org.codehaus.plexus.util.IOUtil;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* Some basic file io utilities
*
* @author pgier
* @author tchemit
* @since 1.0
*/
public class FileUtil
{
public static void tryClose( InputStream is )
{
if ( is == null )
{
return;
}
try
{
is.close();
}
catch ( IOException e )
{
// do nothing
}
}
public static void tryClose( OutputStream os )
{
if ( os == null )
{
return;
}
try
{
os.close();
}
catch ( IOException e )
{
// do nothing
}
}
/**
* Creates the directory (and his parents) if necessary.
*
* @param dir the directory to create if not exisiting
* @return {@code true} if directory was created, {@code false} if was no
* need to create it
* @throws IOException if could not create directory
*/
public static boolean createDirectoryIfNecessary( File dir )
throws IOException
{
if ( !dir.exists() )
{
boolean b = dir.mkdirs();
if ( !b )
{
throw new IOException( "Could not create directory " + dir );
}
return true;
}
return false;
}
public static boolean createNewFile( File file )
throws IOException
{
createDirectoryIfNecessary( file.getParentFile() );
if ( !file.exists() )
{
boolean b = file.createNewFile();
if ( !b )
{
throw new IOException( "Could not create new file " + file );
}
return true;
}
return false;
}
/**
* Delete the given file.
*
* @param file the file to delete
* @throws IOException if could not delete the file
*/
public static void deleteFile( File file )
throws IOException
{
if ( !file.exists() )
{
// file does not exist, can not delete it
return;
}
boolean b = file.delete();
if ( !b )
{
throw new IOException( "could not delete file " + file );
}
}
/**
* Rename the given file to a new destination.
*
* @param file the file to rename
* @param destination the destination file
* @throws IOException if could not rename the file
*/
public static void renameFile( File file, File destination )
throws IOException
{
try {
try {
org.apache.commons.io.FileUtils.forceDelete( destination );
} catch (FileNotFoundException ex) {
//Just do nothing
}
org.apache.commons.io.FileUtils.moveFile( file, destination );
} catch (IOException ex) {
throw new IOException(String.format( "could not rename '%s' to '%s'", file, destination ));
}
}
/**
* Copy a file to a given locationand logging.
*
* @param source represents the file to copy.
* @param target file name of destination file.
* @throws IOException if could not copy file.
*/
public static void copyFile( File source, File target )
throws IOException
{
createDirectoryIfNecessary( target.getParentFile() );
FileUtils.copyFile( source, target );
}
public static File getFile( File base, String... paths )
{
StringBuilder buffer = new StringBuilder();
for ( String path : paths )
{
buffer.append( File.separator ).append( path );
}
return new File( base, buffer.substring( 1 ) );
}
/**
* @param file the source file
* @return the backup file
*/
public static File getBackupFile( File file )
{
return new File( file.getAbsolutePath() + "~" );
}
/**
* Backups the given file using the {@link FileUtil#getBackupFile(File)} as
* destination file.
*
* @param f the file to backup
* @throws IOException if any pb while copying the file
*/
public static void backupFile( File f )
throws IOException
{
File dst = getBackupFile( f );
copyFile( f, dst );
}
/**
* Permet de lire un fichier et de retourner sont contenu sous forme d'une
* chaine de carateres.
*
* @param file le fichier a lire
* @param encoding encoding to read file
* @return the content of the file
* @throws IOException if IO pb
*/
public static String readAsString( File file, String encoding )
throws IOException
{
FileInputStream inf = new FileInputStream( file );
BufferedReader in = new BufferedReader( new InputStreamReader( inf, encoding ) );
try
{
return IOUtil.toString( in );
}
finally
{
in.close();
}
}
/**
* Sauvegarde un contenu dans un fichier.
*
* @param file le fichier a ecrire
* @param content le contenu du fichier
* @param encoding l'encoding d'ecriture
* @throws IOException if IO pb
*/
public static void writeString( File file, String content, String encoding )
throws IOException
{
createDirectoryIfNecessary( file.getParentFile() );
BufferedWriter out;
out = new BufferedWriter( new OutputStreamWriter( new FileOutputStream( file ), encoding ) );
try
{
IOUtil.copy( content, out );
}
finally
{
out.close();
}
}
public static List orderFiles( Collection files )
{
List result = new ArrayList( files );
Collections.sort( result, new Comparator()
{
public int compare( File o1, File o2 )
{
return o1.getAbsolutePath().compareTo( o2.getAbsolutePath() );
}
} );
return result;
}
}
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