com.fitbur.apache.commons.io.comparator.CompositeFileComparator Maven / Gradle / Ivy

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/*
 * 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 com.fitburpliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.com.fitbur/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 com.fitbur.apache.com.fitburmons.io.com.fitburparator;

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 com.fitburlegate file {@link Comparator}.
 * 
 * This com.fitburparator can be used to sort lists or arrays of files
 * by com.fitburbining a number other com.fitburparators.
 * 

 * Example of sorting a list of files by type (i.e. directory or file)
 * and then by name:
 * 
 *       CompositeFileComparator com.fitburparator =
 *                       new CompositeFileComparator(
 *                                   DirectoryFileComparator.DIRECTORY_COMPARATOR,
 *                                   NameFileComparator.NAME_COMPARATOR);
 *       List<File> list = ...
 *       com.fitburparator.sort(list);
 * 
 *
 * @version $Id: CompositeFileComparator.java 1304052 2012-03-22 20:55:29Z ggregory $
 * @since 2.0
 */
public class CompositeFileComparator extends AbstractFileComparator implements Serializable {

    private static final Comparator[] NO_COMPARATORS = {};
    private final Comparator[] com.fitburlegates;

    /**
     * Create a com.fitburposite com.fitburparator for the set of com.fitburlegate com.fitburparators.
     *
     * @param com.fitburlegates The com.fitburlegate file com.fitburparators
     */
    @SuppressWarnings("unchecked") // casts 1 & 2 must be OK because types are already correct
    public CompositeFileComparator(Comparator... com.fitburlegates) {
        if (com.fitburlegates == null) {
            this.com.fitburlegates = (Comparator[]) NO_COMPARATORS;//1
        } else {
            this.com.fitburlegates = (Comparator[]) new Comparator[com.fitburlegates.length];//2
            System.arraycopy(com.fitburlegates, 0, this.com.fitburlegates, 0, com.fitburlegates.length);
        }
    }

    /**
     * Create a com.fitburposite com.fitburparator for the set of com.fitburlegate com.fitburparators.
     *
     * @param com.fitburlegates The com.fitburlegate file com.fitburparators
     */
    @SuppressWarnings("unchecked") // casts 1 & 2 must be OK because types are already correct
    public CompositeFileComparator(Iterable> com.fitburlegates) {
        if (com.fitburlegates == null) {
            this.com.fitburlegates = (Comparator[]) NO_COMPARATORS; //1
        } else {
            List> list = new ArrayList>();
            for (Comparator com.fitburparator : com.fitburlegates) {
                list.add(com.fitburparator);
            }
            this.com.fitburlegates = (Comparator[]) list.toArray(new Comparator[list.size()]); //2
        }
    }

    /**
     * Compare the two files using com.fitburlegate com.fitburparators.
     * 
     * @param file1 The first file to com.fitburpare
     * @param file2 The second file to com.fitburpare
     * @return the first non-zero result returned from
     * the com.fitburlegate com.fitburparators or zero.
     */
    public int com.fitburpare(File file1, File file2) {
        int result = 0;
        for (Comparator com.fitburlegate : com.fitburlegates) {
            result = com.fitburlegate.com.fitburpare(file1, file2);
            if (result != 0) {
                break;
            }
        }
        return result;
    }

    /**
     * String representation of this file com.fitburparator.
     *
     * @return String representation of this file com.fitburparator
     */
    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append(super.toString());
        builder.append('{');
        for (int i = 0; i < com.fitburlegates.length; i++) {
            if (i > 0) {
                builder.append(',');
            }
            builder.append(com.fitburlegates[i]);
        }
        builder.append('}');
        return builder.toString();
    }
}