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Jadex bridge is a base package for kernels and platforms, i.e., it is used by both and provides commonly used interfaces and classes for active components and their management.
package jadex.base;
import java.io.File;
import jadex.bridge.IComponentStep;
import jadex.bridge.IExternalAccess;
import jadex.bridge.IInternalAccess;
import jadex.bridge.service.types.filetransfer.FileData;
import jadex.commons.SUtil;
import jadex.commons.future.Future;
import jadex.commons.future.IFuture;
import jadex.commons.transformation.annotations.Classname;
/**
* Helper methods for remote file system view.
*/
public class SRemoteFileChooser
{
/**
* Initialize the remote file system view such that
* home, default and current directory as well as roots
* are available.
*/
public static IFuture init(IExternalAccess access)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("init")
public IFuture execute(IInternalAccess ia)
{
try
{
Object[] ret = new Object[4];
ret[0] = FileData.convertToRemoteFiles(File.listRoots());
ret[1] = new FileData(SUtil.getHomeDirectory());
ret[2] = new FileData(SUtil.getDefaultDirectory());
String path = new File(".").getAbsolutePath();
if(path.endsWith("."))
{
path = path.substring(0, path.length()-1);
}
ret[3] = new FileData(new File(path));
return new Future(ret);
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
/**
* Returns all root partitions on this system. For example, on Windows, this
* would be the "Desktop" folder, while on DOS this would be the A: through
* Z: drives.
*/
public static IFuture getRoots(IExternalAccess access)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("getRoots")
public IFuture execute(IInternalAccess ia)
{
try
{
File[] roots = File.listRoots();
return new Future(FileData.convertToRemoteFiles(roots));
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
// Providing default implementations for the remaining methods
// because most OS file systems will likely be able to use this
// code. If a given OS can't, override these methods in its
// implementation.
public static IFuture getHomeDirectory(IExternalAccess access)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("getHomeDirectory")
public IFuture execute(IInternalAccess ia)
{
try
{
File ret = SUtil.getHomeDirectory();
return new Future(ret!=null? new FileData(ret): null);
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
/**
* Get the current directory of the remote VM.
*/
public static IFuture getCurrentDirectory(IExternalAccess access)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("getCurrentDirectory")
public IFuture execute(IInternalAccess ia)
{
try
{
String path = new File(".").getAbsolutePath();
if(path.endsWith("."))
{
path = path.substring(0, path.length()-1);
}
return new Future(new FileData(new File(path)));
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
/**
* Return the user's default starting directory for the file chooser.
*
* @return a File object representing the default starting
* folder
* @since 1.4
*/
public static IFuture getDefaultDirectory(IExternalAccess access)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("getDefaultDirectory")
public IFuture execute(IInternalAccess ia)
{
try
{
File ret = SUtil.getDefaultDirectory();
return new Future(ret!=null? new FileData(ret): null);
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
/**
* Gets the list of shown (i.e. not hidden) files.
*/
public static IFuture getFiles(IExternalAccess access, final FileData mydir, final boolean useFileHiding)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("getFiles")
public IFuture execute(IInternalAccess ia)
{
try
{
File dir = new File(mydir.getPath());
File[] files;
if(dir.exists())
{
files = SUtil.getFiles(dir, useFileHiding);
// System.out.println("children: "+dir+" "+SUtil.arrayToString(files));
}
else
{
// System.out.println("file does not exist: "+dir);
files = new File[0];
}
return new Future(FileData.convertToRemoteFiles(files));
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
/**
* Returns the parent directory of dir.
*
* @param dir the File being queried
* @return the parent directory of dir, or null if
* dir is null
*/
public static IFuture getParentDirectory(IExternalAccess access, final String path)
{
return access.scheduleStep(new IComponentStep()
{
@Classname("getParentDirectory")
public IFuture execute(IInternalAccess ia)
{
try
{
File parent = SUtil.getParentDirectory(new File(path)); // todo: useFileHandling
return new Future(parent!=null? new FileData(parent): null);
}
catch(Exception e)
{
// Protect remote platform from execution errors.
Thread.dumpStack();
e.printStackTrace();
return new Future(e);
}
}
});
}
}