donaldp 01/12/30 03:10:35
Added: proposal/myrmidon/src/main/org/apache/tools/ant/taskdefs/file
Touch.java
Log:
Move touch into the file package
Revision Changes Path
1.1
jakarta-ant/proposal/myrmidon/src/main/org/apache/tools/ant/taskdefs/file/Touch.java
Index: Touch.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.tools.ant.taskdefs.file;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Locale;
import org.apache.myrmidon.api.TaskException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.FileSet;
/**
* Touch a file and/or fileset(s) -- corresponds to the Unix touch command.
<p>
*
* If the file to touch doesn't exist, an empty one is created. </p> <p>
*
* Note: Setting the modification time of files is not supported in JDK
1.1.</p>
*
* @author <a href="mailto:[EMAIL PROTECTED]">Stefan Bodewig</a>
* @author <a href="mailto:[EMAIL PROTECTED]">Michael J. Sikorsky</a>
* @author <a href="mailto:[EMAIL PROTECTED]">Robert Shaw</a>
*/
public class Touch extends Task
{// required
private long millis = -1;
private ArrayList filesets = new ArrayList();
private String dateTime;
private File file;
/**
* Date in the format MM/DD/YYYY HH:MM AM_PM.
*
* @param dateTime The new Datetime value
*/
public void setDatetime( String dateTime )
{
this.dateTime = dateTime;
}
/**
* Sets a single source file to touch. If the file does not exist an empty
* file will be created.
*
* @param file The new File value
*/
public void setFile( File file )
{
this.file = file;
}
/**
* Milliseconds since 01/01/1970 00:00 am.
*
* @param millis The new Millis value
*/
public void setMillis( long millis )
{
this.millis = millis;
}
/**
* Adds a set of files (nested fileset attribute).
*
* @param set The feature to be added to the Fileset attribute
*/
public void addFileset( FileSet set )
{
filesets.add( set );
}
/**
* Execute the touch operation.
*
* @exception TaskException Description of Exception
*/
public void execute()
throws TaskException
{
if( file == null && filesets.size() == 0 )
{
throw
new TaskException( "Specify at least one source - a file or a
fileset." );
}
if( file != null && file.exists() && file.isDirectory() )
{
throw new TaskException( "Use a fileset to touch directories." );
}
if( dateTime != null )
{
DateFormat df = DateFormat.getDateTimeInstance( DateFormat.SHORT,
DateFormat.SHORT,
Locale.US );
try
{
setMillis( df.parse( dateTime ).getTime() );
if( millis < 0 )
{
throw new TaskException( "Date of " + dateTime
+ " results in negative
milliseconds value relative to epoch (January 1, 1970, 00:00:00 GMT)." );
}
}
catch( ParseException pe )
{
throw new TaskException( pe.getMessage(), pe );
}
}
touch();
}
/**
* Does the actual work. Entry point for Untar and Expand as well.
*
* @exception TaskException Description of Exception
*/
protected void touch()
throws TaskException
{
if( file != null )
{
if( !file.exists() )
{
getLogger().info( "Creating " + file );
try
{
FileOutputStream fos = new FileOutputStream( file );
fos.write( new byte[ 0 ] );
fos.close();
}
catch( IOException ioe )
{
throw new TaskException( "Could not create " + file, ioe
);
}
}
}
boolean resetMillis = false;
if( millis < 0 )
{
resetMillis = true;
millis = System.currentTimeMillis();
}
if( file != null )
{
touch( file );
}
// deal with the filesets
for( int i = 0; i < filesets.size(); i++ )
{
FileSet fs = (FileSet)filesets.get( i );
DirectoryScanner ds = fs.getDirectoryScanner( getProject() );
File fromDir = fs.getDir( getProject() );
String[] srcFiles = ds.getIncludedFiles();
String[] srcDirs = ds.getIncludedDirectories();
for( int j = 0; j < srcFiles.length; j++ )
{
touch( new File( fromDir, srcFiles[ j ] ) );
}
for( int j = 0; j < srcDirs.length; j++ )
{
touch( new File( fromDir, srcDirs[ j ] ) );
}
}
if( resetMillis )
{
millis = -1;
}
}
protected void touch( File file )
throws TaskException
{
if( !file.canWrite() )
{
throw new TaskException( "Can not change modification date of
read-only file " + file );
}
final long time = ( millis < 0 ) ? System.currentTimeMillis() :
millis;
file.setLastModified( time );
}
}
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