- /*
- * Copyright 2002-2004 The Apache Software Foundation.
- *
- * Licensed 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.util.List;
-
- /**
- * Filters filenames for a certain prefix.
- * <p>
- * For example, to print all files and directories in the
- * current directory whose name starts with <code>Test</code>:
- *
- * <pre>
- * File dir = new File(".");
- * String[] files = dir.list( new PrefixFileFilter("Test") );
- * for ( int i = 0; i < files.length; i++ ) {
- * System.out.println(files[i]);
- * }
- * </pre>
- *
- * @since Commons IO 1.0
- * @version $Revision: 1.8 $ $Date: 2004/02/23 04:37:57 $
- *
- * @author Henri Yandell
- * @author Stephen Colebourne
- * @author Federico Barbieri
- * @author Serge Knystautas
- * @author Peter Donald
- */
- public class PrefixFileFilter extends AbstractFileFilter {
-
- /** The filename prefixes to search for */
- private String[] prefixes;
-
- /**
- * Constructs a new Prefix file filter for a single prefix.
- *
- * @param prefix the prefix to allow, must not be null
- * @throws IllegalArgumentException if the prefix is null
- */
- public PrefixFileFilter(String prefix) {
- if (prefix == null) {
- throw new IllegalArgumentException("The prefix must not be null");
- }
- this.prefixes = new String[] {prefix};
- }
-
- /**
- * Constructs a new Prefix file filter for any of an array of prefixes.
- * <p>
- * The array is not cloned, so could be changed after constructing the
- * instance. This would be inadvisable however.
- *
- * @param prefixes the prefixes to allow, must not be null
- * @throws IllegalArgumentException if the prefix array is null
- */
- public PrefixFileFilter(String[] prefixes) {
- if (prefixes == null) {
- throw new IllegalArgumentException("The array of prefixes must not be null");
- }
- this.prefixes = prefixes;
- }
-
- /**
- * Constructs a new Prefix file filter for a list of prefixes.
- *
- * @param prefixes the prefixes to allow, must not be null
- * @throws IllegalArgumentException if the prefix list is null
- * @throws ClassCastException if the list does not contain Strings
- */
- public PrefixFileFilter(List prefixes) {
- if (prefixes == null) {
- throw new IllegalArgumentException("The list of prefixes must not be null");
- }
- this.prefixes = (String[]) prefixes.toArray(new String[prefixes.size()]);
- }
-
- /**
- * Checks to see if the filename starts with the prefix.
- *
- * @param file the File to check
- * @return true if the filename starts with one of our prefixes
- */
- public boolean accept(File file) {
- String name = file.getName();
- for (int i = 0; i < this.prefixes.length; i++) {
- if (name.startsWith(this.prefixes[i])) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * Checks to see if the filename starts with the prefix.
- *
- * @param file the File directory
- * @param name the filename
- * @return true if the filename starts with one of our prefixes
- */
- public boolean accept(File file, String name) {
- for (int i = 0; i < prefixes.length; i++) {
- if (name.startsWith(prefixes[i])) {
- return true;
- }
- }
- return false;
- }
-
- }