org.openide.loaders.FileEntry Maven / Gradle / Ivy
/*
* Sun Public License Notice
*
* The contents of this file are subject to the Sun Public License
* Version 1.0 (the "License"). You may not use this file except in
* compliance with the License. A copy of the License is available at
* http://www.sun.com/
*
* The Original Code is NetBeans. The Initial Developer of the Original
* Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun
* Microsystems, Inc. All Rights Reserved.
*/
package org.openide.loaders;
import java.io.*;
import org.openide.filesystems.*;
import org.openide.util.NbBundle;
/** Entry that works with plain files. Copies, moves,
* renames and deletes them without any modification.
*
* @author Jaroslav Tulach
*/
public class FileEntry extends MultiDataObject.Entry {
/** generated Serialized Version UID */
static final long serialVersionUID = 5972727204237511983L;
/** Creates new file entry initially attached to a given file object.
* @param obj the data object this entry belongs to
* @param fo the file object for the entry
*/
public FileEntry(MultiDataObject obj, FileObject fo) {
obj.super (fo);
}
/* Makes a copy to given folder.
* @param f the folder to copy to
* @param suffix the suffix to add to the name of original file
*/
public FileObject copy (FileObject f, String suffix) throws IOException {
FileObject fo = getFile();
String newName = fo.getName() + suffix;
return fo.copy (f, newName, fo.getExt ());
}
/* Renames underlying fileobject. This implementation return the
* same file.
*
* @param name new name
* @return file object with renamed file
*/
public FileObject rename (String name) throws IOException {
boolean locked = isLocked ();
FileLock lock = takeLock();
try {
getFile().rename(lock, name, getFile().getExt());
} finally {
if (!locked)
lock.releaseLock();
}
return getFile ();
}
/* Moves file to another folder
* @param f the folder
* @param suffix the suffix to append to original name of the file
* @return new file object for the file
*/
public FileObject move (FileObject f, String suffix) throws IOException {
boolean locked = isLocked ();
FileObject fo = getFile();
FileLock lock = takeLock ();
try {
String newName = fo.getName() + suffix;
FileObject dest = fo.move (lock, f, newName, fo.getExt ());
return dest;
} finally {
if (!locked)
lock.releaseLock ();
}
}
/* Deletes file object
*/
public void delete () throws IOException {
/* JST: This fixes bug 4660. But I am not sure whether this will not
* create another or open some old bug.
if (isLocked())
throw new IOException(NbBundle.getBundle (FileEntry.class).getString ("EXC_SharedAccess"));
*/
boolean locked = isLocked ();
FileLock lock = takeLock();
try {
getFile().delete(lock);
}
finally {
if (!locked)
lock.releaseLock();
}
}
/* Creates dataobject from template. Copies the file
* @param f the folder to create instance in
* @param name name of the file or null if it should be choosen automaticly
*/
public FileObject createFromTemplate (FileObject f, String name) throws IOException {
if (name == null) {
name = FileUtil.findFreeFileName(
f,
getFile ().getName (), getFile ().getExt ()
);
}
FileObject fo = getFile().copy (f, name, getFile().getExt ());
// unmark template state
DataObject.setTemplate (fo, false);
return fo;
}
/** Specialized entry that simplifies substitution when a file entry
* is created from template.
* Subclasses must implement
* {@link #createFormat} and return a valid text format that
* will be used for converting the lines of the original file
* to lines in the newly created one.
*/
public abstract static class Format extends FileEntry {
static final long serialVersionUID =8896750589709521197L;
/** Create a new entry initially attached to a given file object.
* @param obj the data object this entry belongs to
* @param fo the file object for the entry
*/
public Format (MultiDataObject obj, FileObject fo) {
super (obj, fo);
}
/* Creates dataobject from template. Copies the file and applyes substitutions
* provided by the createFormat method.
*
* @param f the folder to create instance in
* @param name name of the file or null if it should be choosen automaticly
*/
public FileObject createFromTemplate (FileObject f, String name) throws IOException {
String ext = getFile ().getExt ();
if (name == null) {
name = FileUtil.findFreeFileName(
f,
getFile ().getName (), ext
);
}
FileObject fo = f.createData (name, ext);
java.text.Format frm = createFormat (f, name, ext);
BufferedReader r = new BufferedReader (new InputStreamReader (getFile ().getInputStream ()));
try {
FileLock lock = fo.lock ();
try {
BufferedWriter w = new BufferedWriter (new OutputStreamWriter (fo.getOutputStream (lock)));
try {
String current;
while ((current = r.readLine ()) != null) {
w.write (frm.format (current));
// Cf. #7061.
w.newLine ();
}
} finally {
w.close ();
}
} finally {
lock.releaseLock ();
}
} finally {
r.close ();
}
// copy attributes
FileUtil.copyAttributes (getFile (), fo);
// unmark template state
DataObject.setTemplate (fo, false);
return fo;
}
/** Provide a suitable format for
* substitution of lines.
*
* @param target the target folder of the installation
* @param n the name the file will have
* @param e the extension the file will have
* @return a format to use for formatting lines
*/
protected abstract java.text.Format createFormat (FileObject target, String n, String e);
}
/** Simple file entry variant. It does nearly nothing.
* When a file is copied, it does nothing. If it is moved
* or renamed it deletes the file.
*
* Useful for representing useless files.
*/
public final static class Numb extends MultiDataObject.Entry {
/** generated Serialized Version UID */
static final long serialVersionUID = -6572157492885890612L;
/**
* Create a dummy entry.
* @param obj the data object this entry belongs to
* @param fo the file object to create an entry for
*/
public Numb (MultiDataObject obj, FileObject fo) {
obj.super (fo);
}
/** Is not important at all.
* @return false
*/
public boolean isImportant () {
return false;
}
/** Does nothing.
* @param f ignored
* @param suffix ignored
* @return null
*/
public FileObject copy (FileObject f, String suffix) {
return null;
}
/** Removes file.
* @param name ignored
* @return null
* @throws IOException in case of problem
*/
public FileObject rename (String name) throws IOException {
stdBehaving();
return null;
}
/** Removes file.
* @param f ignored
* @param suffix ignored
* @return null
* @throws IOException in case of problem
*/
public FileObject move (FileObject f, String suffix) throws IOException {
stdBehaving();
return null;
}
/** Removes file.
* @throws IOException in case of problem
*/
public void delete () throws IOException {
stdBehaving();
}
/** Removes file.
* @throws IOException in case of problem
*/
private void stdBehaving () throws IOException {
if (getFile() == null)
return;
if (isLocked())
throw new IOException (NbBundle.getBundle (FileEntry.class).getString ("EXC_SharedAccess"));
FileLock lock = takeLock();
try {
getFile().delete(lock);
} finally {
if (lock != null)
lock.releaseLock();
}
}
/** Does nothing.
* @param f ignored
* @param name ignored
* @return null
*/
public FileObject createFromTemplate (FileObject f, String name) {
return null;
}
}
/** Simple entry for handling folders, on copy, move and createFromTemplate
* it creates new empty folder and copies attributes of source folder.
* Operation on children should be performed explicitly by DataObject
* using this entry.
* @since 1.13
*/
public final static class Folder extends MultiDataObject.Entry {
/** Creates new FolderEntry */
public Folder (MultiDataObject obj, FileObject fo) {
obj.super (fo);
}
/** Creates new folder and copies attributes.
* @param f the folder to create this entry in
* @param suffix suffix appended to the new name to use
* @return the copied FileObject or null if it cannot be copied
* @exception IOException when the operation fails
*/
public FileObject copy (FileObject f, String suffix) throws IOException {
String add = suffix + ((getFile ().getExt ().length () > 0) ? "." + getFile ().getExt () : "");
FileObject fo = FileUtil.createFolder (f, getFile ().getName () + add);
FileUtil.copyAttributes (getFile (), fo);
return fo;
}
/** Nearly the same like {@link #copy (FileObject f, String suffix)}.
* @param f the folder to move this entry to
* @param suffix suffix appended to the new name to use
* @return the moved FileObject or null if it has been deleted
* @exception IOException when the operation fails
*/
public FileObject move (FileObject f, String suffix) throws IOException {
return copy (f, suffix);
}
/** Creates new folder and copies attributes, the template flag is cleared.
* @param f the folder to create this entry in
* @param name the new name to use
* @return the copied FileObject or null if it cannot be copied
* @exception IOException when the operation fails
*/
public FileObject createFromTemplate (FileObject f, String name) throws IOException {
if (name == null) {
name = FileUtil.findFreeFileName(
f,
getFile ().getName (), getFile ().getExt ()
);
}
FileObject fo = FileUtil.createFolder (f, name);
FileUtil.copyAttributes (getFile (), fo);
DataObject.setTemplate (fo, false);
return fo;
}
/** Renames folder.
* @param name the new name
* @return the renamed FileObject or null if it has been deleted
* @exception IOException when the operation fails
*/
public FileObject rename (String name) throws IOException {
boolean locked = isLocked ();
FileLock lock = takeLock ();
try {
getFile ().rename (lock, name, null);
} finally {
if (!locked)
lock.releaseLock ();
}
return getFile ();
}
/** Deletes folder associated with entry. Although filesystems delete
* folders recursively, it is better to delete children DataObjects before
* the {@link #FileEntry.Folder} entry is deleted.
* @exception IOException when the operation fails
*/
public void delete () throws IOException {
boolean locked = isLocked ();
FileLock lock = takeLock ();
try {
getFile ().delete (lock);
} finally {
if (!locked)
lock.releaseLock();
}
}
}
}