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From "Gary D. Gregory (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (VFS-400) Add a FileSelector based on regular expressions
Date Wed, 16 May 2012 16:07:02 GMT

     [ https://issues.apache.org/jira/browse/VFS-400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary D. Gregory updated VFS-400:
--------------------------------

    Comment: was deleted

(was: Implemented as org.apache.commons.vfs2.PatternFileSelector.)
    
> Add a FileSelector based on regular expressions
> -----------------------------------------------
>
>                 Key: VFS-400
>                 URL: https://issues.apache.org/jira/browse/VFS-400
>             Project: Commons VFS
>          Issue Type: New Feature
>    Affects Versions: 2.1
>            Reporter: Rikard Oxenstrand
>            Priority: Minor
>             Fix For: 2.1
>
>         Attachments: FileRegexSelector.java.patch
>
>
> In the long todo list there was a post about adding a file selector based on regular
expressions. I had need for that for a specific project so I built a simple class that seems
to work. I'm kind of new to open source contribution though so I'm not sure if i should just
commit it to trunk. Here is the code:
> {code:title=FileRegexSelector.java|borderStyle=solid}
> /*
>  * 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 "License"); you may not use this file except in compliance 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 "AS IS" BASIS,
>  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
>  * See the License for the specific language governing permissions and
>  * limitations under the License.
>  */
> package org.apache.commons.vfs2;
> import java.util.regex.Matcher;
> import java.util.regex.Pattern;
> /**
>  * A {@link FileSelector} that selects based on regular expressions matched against base
filename.
>  * 
>  * @since 2.1
>  */
> public class FileRegexSelector implements FileSelector
> {
>     /**
>      * The extensions to select.
>      */
>     private Pattern pattern = null;
>     /**
>      * Creates a new selector for the given extensions.
>      * 
>      * @param extensions
>      *            The extensions to be included by this selector.
>      */
>     public FileRegexSelector(String regex)
>     {
>     	this.pattern = Pattern.compile(regex);
>     }
>     /**
>      * Determines if a file or folder should be selected.
>      * @param fileInfo
>      *            The file selection information.
>      * @return true if the file should be selected, false otherwise.
>      */
>     public boolean includeFile(final FileSelectInfo fileInfo)
>     {
>         if (this.pattern == null)
>         {
>             return false;
>         }
>     	Matcher matcher = this.pattern.matcher(fileInfo.getFile().getName().getBaseName());
>         return matcher.matches();
>     }
>     /**
>      * Determines whether a folder should be traversed.
>      * 
>      * @param fileInfo
>      *            The file selection information.
>      * @return true if descendents should be traversed, fase otherwise.
>      */
>     public boolean traverseDescendents(final FileSelectInfo fileInfo)
>     {
>         return true;
>     }
> }
> {code}

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