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Commons IO example source code file (WildcardFilter.java)

This example Commons IO source code file (WildcardFilter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons IO tags/keywords

abstractfilefilter, deprecated, file, illegalargumentexception, illegalargumentexception, io, override, serializable, string, string, the, the, util, wildcardfilter, wildcardfilter

The Commons IO WildcardFilter.java source code

/*
 * 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.io.filefilter;

import java.io.File;
import java.io.Serializable;
import java.util.List;

import org.apache.commons.io.FilenameUtils;

/**
 * Filters files using the supplied wildcards.
 * <p>
 * This filter selects files, but not directories, based on one or more wildcards
 * and using case-sensitive comparison.
 * <p>
 * The wildcard matcher uses the characters '?' and '*' to represent a
 * single or multiple wildcard characters.
 * This is the same as often found on Dos/Unix command lines.
 * The extension check is case-sensitive.
 * See {@link FilenameUtils#wildcardMatch(String, String)} for more information.
 * <p>
 * For example:
 * <pre>
 * File dir = new File(".");
 * FileFilter fileFilter = new WildcardFilter("*test*.java~*~");
 * File[] files = dir.listFiles(fileFilter);
 * for (int i = 0; i < files.length; i++) {
 *   System.out.println(files[i]);
 * }
 * </pre>
 *
 * @author Jason Anderson
 * @version $Revision: 1004077 $ $Date: 2010-10-04 01:58:42 +0100 (Mon, 04 Oct 2010) $
 * @since Commons IO 1.1
 * @deprecated Use WilcardFileFilter. Deprecated as this class performs directory
 * filtering which it shouldn't do, but that can't be removed due to compatability.
 */
@Deprecated
public class WildcardFilter extends AbstractFileFilter implements Serializable {

    /** The wildcards that will be used to match filenames. */
    private final String[] wildcards;

    /**
     * Construct a new case-sensitive wildcard filter for a single wildcard.
     *
     * @param wildcard  the wildcard to match
     * @throws IllegalArgumentException if the pattern is null
     */
    public WildcardFilter(String wildcard) {
        if (wildcard == null) {
            throw new IllegalArgumentException("The wildcard must not be null");
        }
        this.wildcards = new String[] { wildcard };
    }

    /**
     * Construct a new case-sensitive wildcard filter for an array of wildcards.
     *
     * @param wildcards  the array of wildcards to match
     * @throws IllegalArgumentException if the pattern array is null
     */
    public WildcardFilter(String[] wildcards) {
        if (wildcards == null) {
            throw new IllegalArgumentException("The wildcard array must not be null");
        }
        this.wildcards = new String[wildcards.length];
        System.arraycopy(wildcards, 0, this.wildcards, 0, wildcards.length);
    }

    /**
     * Construct a new case-sensitive wildcard filter for a list of wildcards.
     *
     * @param wildcards  the list of wildcards to match
     * @throws IllegalArgumentException if the pattern list is null
     * @throws ClassCastException if the list does not contain Strings
     */
    public WildcardFilter(List<String> wildcards) {
        if (wildcards == null) {
            throw new IllegalArgumentException("The wildcard list must not be null");
        }
        this.wildcards = wildcards.toArray(new String[wildcards.size()]);
    }

    //-----------------------------------------------------------------------
    /**
     * Checks to see if the filename matches one of the wildcards.
     *
     * @param dir  the file directory
     * @param name  the filename
     * @return true if the filename matches one of the wildcards
     */
    @Override
    public boolean accept(File dir, String name) {
        if (dir != null && new File(dir, name).isDirectory()) {
            return false;
        }

        for (String wildcard : wildcards) {
            if (FilenameUtils.wildcardMatch(name, wildcard)) {
                return true;
            }
        }
        
        return false;
    }

    /**
     * Checks to see if the filename matches one of the wildcards.
     *
     * @param file the file to check
     * @return true if the filename matches one of the wildcards
     */
    @Override
    public boolean accept(File file) {
        if (file.isDirectory()) {
            return false;
        }

        for (String wildcard : wildcards) {
            if (FilenameUtils.wildcardMatch(file.getName(), wildcard)) {
                return true;
            }
        }
        
        return false;
    }

}

Other Commons IO examples (source code examples)

Here is a short list of links related to this Commons IO WildcardFilter.java source code file:



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