/*
* 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;
import org.apache.commons.io.IOCase;
/**
* Filters files using the supplied wildcards.
* <p>
* This filter selects files and directories based on one or more wildcards.
* Testing is case-sensitive by default, but this can be configured.
* <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 by .
* See {@link FilenameUtils#wildcardMatchOnSystem} for more information.
* <p>
* For example:
* <pre>
* File dir = new File(".");
* FileFilter fileFilter = new WildcardFileFilter("*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: 2010-10-03 20:58:42 -0400 (Sun, 03 Oct 2010) $
* @since Commons IO 1.3
*/
public class WildcardFileFilter extends AbstractFileFilter implements Serializable {
/** The wildcards that will be used to match filenames. */
private final String[] wildcards;
/** Whether the comparison is case sensitive. */
private final IOCase caseSensitivity;
/**
* 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 WildcardFileFilter(String wildcard) {
this(wildcard, null);
}
/**
* Construct a new wildcard filter for a single wildcard specifying case-sensitivity.
*
* @param wildcard the wildcard to match, not null
* @param caseSensitivity how to handle case sensitivity, null means case-sensitive
* @throws IllegalArgumentException if the pattern is null
*/
public WildcardFileFilter(String wildcard, IOCase caseSensitivity) {
if (wildcard == null) {
throw new IllegalArgumentException("The wildcard must not be null");
}
this.wildcards = new String[] { wildcard };
this.caseSensitivity = (caseSensitivity == null ? IOCase.SENSITIVE : caseSensitivity);
}
/**
* Construct a new case-sensitive wildcard filter for an array of wildcards.
* <p>
* The array is not cloned, so could be changed after constructing the
* instance. This would be inadvisable however.
*
* @param wildcards the array of wildcards to match
* @throws IllegalArgumentException if the pattern array is null
*/
public WildcardFileFilter(String[] wildcards) {
this(wildcards, null);
}
/**
* Construct a new wildcard filter for an array of wildcards specifying case-sensitivity.
* <p>
* The array is not cloned, so could be changed after constructing the
* instance. This would be inadvisable however.
*
* @param wildcards the array of wildcards to match, not null
* @param caseSensitivity how to handle case sensitivity, null means case-sensitive
* @throws IllegalArgumentException if the pattern array is null
*/
public WildcardFileFilter(String[] wildcards, IOCase caseSensitivity) {
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);
this.caseSensitivity = (caseSensitivity == null ? IOCase.SENSITIVE : caseSensitivity);
}
/**
* Construct a new case-sensitive wildcard filter for a list of wildcards.
*
* @param wildcards the list of wildcards to match, not null
* @throws IllegalArgumentException if the pattern list is null
* @throws ClassCastException if the list does not contain Strings
*/
public WildcardFileFilter(List<String> wildcards) {
this(wildcards, null);
}
/**
* Construct a new wildcard filter for a list of wildcards specifying case-sensitivity.
*
* @param wildcards the list of wildcards to match, not null
* @param caseSensitivity how to handle case sensitivity, null means case-sensitive
* @throws IllegalArgumentException if the pattern list is null
* @throws ClassCastException if the list does not contain Strings
*/
public WildcardFileFilter(List<String> wildcards, IOCase caseSensitivity) {
if (wildcards == null) {
throw new IllegalArgumentException("The wildcard list must not be null");
}
this.wildcards = wildcards.toArray(new String[wildcards.size()]);
this.caseSensitivity = (caseSensitivity == null ? IOCase.SENSITIVE : caseSensitivity);
}
//-----------------------------------------------------------------------
/**
* 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) {
for (String wildcard : wildcards) {
if (FilenameUtils.wildcardMatch(name, wildcard, caseSensitivity)) {
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) {
String name = file.getName();
for (String wildcard : wildcards) {
if (FilenameUtils.wildcardMatch(name, wildcard, caseSensitivity)) {
return true;
}
}
return false;
}
/**
* Provide a String representaion of this file filter.
*
* @return a String representaion
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder();
buffer.append(super.toString());
buffer.append("(");
if (wildcards != null) {
for (int i = 0; i < wildcards.length; i++) {
if (i > 0) {
buffer.append(",");
}
buffer.append(wildcards[i]);
}
}
buffer.append(")");
return buffer.toString();
}
}
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