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Commons IO example source code file (CompositeFileComparator.java)
The Commons IO CompositeFileComparator.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.comparator; import java.io.File; import java.io.Serializable; import java.util.ArrayList; import java.util.Comparator; import java.util.List; /** * Compare two files using a set of delegate file {@link Comparator}. * <p> * This comparator can be used to sort lists or arrays of files * by combining a number other comparators. * <p> * Example of sorting a list of files by type (i.e. directory or file) * and then by name: * <pre> * CompositeFileComparator comparator = * new CompositeFileComparator( * DirectoryFileComparator.DIRECTORY_COMPARATOR, * NameFileComparator.NAME_COMPARATOR); * List<File> list = ... * comparator.sort(list); * </pre> * * @version $Revision: 896991 $ $Date: 2010-01-07 20:03:42 +0000 (Thu, 07 Jan 2010) $ * @since Commons IO 2.0 */ public class CompositeFileComparator extends AbstractFileComparator implements Serializable { private static final Comparator<?>[] NO_COMPARATORS = {}; private final Comparator<File>[] delegates; /** * Create a composite comparator for the set of delegate comparators. * * @param delegates The delegate file comparators */ @SuppressWarnings("unchecked") // casts 1 & 2 must be OK because types are already correct public CompositeFileComparator(Comparator<File>... delegates) { if (delegates == null) { this.delegates = (Comparator<File>[]) NO_COMPARATORS;//1 } else { this.delegates = (Comparator<File>[]) new Comparator>[delegates.length];//2 System.arraycopy(delegates, 0, this.delegates, 0, delegates.length); } } /** * Create a composite comparator for the set of delegate comparators. * * @param delegates The delegate file comparators */ @SuppressWarnings("unchecked") // casts 1 & 2 must be OK because types are already correct public CompositeFileComparator(Iterable<Comparator Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO CompositeFileComparator.java source code file: |
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