netbeans.apache.org/src/content/wiki/DevFaqFilesFromNodes.asciidoc

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= DevFaqFilesFromNodes
:jbake-type: wiki
:jbake-tags: wiki, devfaq, needsreview
:jbake-status: published
:keywords: Apache NetBeans wiki DevFaqFilesFromNodes
:description: Apache NetBeans wiki DevFaqFilesFromNodes
:toc: left
:toc-title:
:syntax: true

== How do I get at the file that a particular node represents?

In general, it shall be enough to request a link:FileObject.asciidoc[FileObject] via link:Lookup.asciidoc[Lookup]:

[source,java]
----

Node n = ...;
FileObject fo = n.getLookup().lookup(FileObject.class);
if (fo != null) {
    File f = FileUtil.toFile (fo);
    if (f != null) { //if it is null, it is a virtual file -
                     //its filesystem does not represent disk-based storage
       //do something
    }
}

----

If this does not work for some (strange) reason. You may fallback to old good way and get the `DataObject` the node represents, and drill down to a file from there

[source,java]
----

Node n = ...;
DataObject dob = n.getLookup().lookup(DataObject.class);
if (dob == null) {
    // definitely not a file node
} else {
    // could also get all files in the data object, if desired:
    FileObject fo = dob.getPrimaryFile();
    // and if you really need java.io.File
    File f = FileUtil.toFile (fo);
    if (f != null) { //if it is null, it is a virtual file -
                     //its filesystem does not represent disk-based storage
       //do something
    }
}

----

In the other direction you can use `DataObject.find` and then `DataObject.getNodeDelegate`
to get a node representing a file object.

Also see link:DevFaqFileVsFileObject.asciidoc[DevFaqFileVsFileObject] if you need `java.io.File` for some reason.

== Apache Migration Information

The content in this page was kindly donated by Oracle Corp. to the
Apache Software Foundation.

This page was exported from link:http://wiki.netbeans.org/DevFaqFilesFromNodes[http://wiki.netbeans.org/DevFaqFilesFromNodes] , 
that was last modified by NetBeans user Jtulach 
on 2010-07-24T18:53:56Z.


*NOTE:* This document was automatically converted to the AsciiDoc format on 2018-02-07, and needs to be reviewed.