| // |
| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
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| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
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| // |
| |
| = DevFaqFileAttributes |
| :jbake-type: wiki |
| :jbake-tags: wiki, devfaq, needsreview |
| :jbake-status: published |
| :keywords: Apache NetBeans wiki DevFaqFileAttributes |
| :description: Apache NetBeans wiki DevFaqFileAttributes |
| :toc: left |
| :toc-title: |
| :syntax: true |
| |
| === What are File Attributes? |
| |
| link:DevFaqFileObject.asciidoc[FileObjects] have _attributes_. These are ad-hoc key-value |
| pairs which can be associated with a file and persist across shutdown and restart. |
| |
| Attributes are routinely used in the link:DevFaqModulesLayerFile.asciidoc[module XML files] which define the initial contents of the link:DevFaqSystemFilesystem.asciidoc[system filesystem]. They are used to providing additional configuration data for files, such as declaring sorting order or the path to an icon file. |
| |
| Attributes are perfectly safe to use freely in `layer.xml` files. |
| |
| In pre-4.0 NetBeans, they were relatively commonly used for user files on disk. They still may be used for user files, but this is now discouraged - the infrastructure has been changed to store all attributes in the link:DevFaqUserDir.asciidoc[userdir] rather than sprinking `.nbattrs` files in directories all over the user's disk. Since they are now stored in a central location, the more attributes there are, the longer it takes to find attributes for any given file. Using attributes for user files _on disk_ has negative performance implications. |
| |
| See `link:http://bits.netbeans.org/dev/javadoc/org-openide-filesystems/org/openide/filesystems/FileObject.html#getAttribute(java.lang.String)[FileObject.getAttribute]` and |
| `link:http://bits.netbeans.org/dev/javadoc/org-openide-filesystems/org/openide/filesystems/FileObject.html#setAttribute(java.lang.String,%20java.lang.Object)[FileObject.setAttribute]`. |
| |
| === 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/DevFaqFileAttributes[http://wiki.netbeans.org/DevFaqFileAttributes] , |
| that was last modified by NetBeans user Tboudreau |
| on 2010-02-19T01:50:59Z. |
| |
| |
| *NOTE:* This document was automatically converted to the AsciiDoc format on 2018-02-07, and needs to be reviewed. |