001/* 
002 * Copyright (C) 2016 Hobrasoft s.r.o.
003 *
004 * This program is free software: you can redistribute it and/or modify
005 * it under the terms of the GNU Affero General Public License as published by
006 * the Free Software Foundation, either version 3 of the License, or
007 * (at your option) any later version.
008 *
009 * This program is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012 * GNU Affero General Public License for more details.
013 *
014 * You should have received a copy of the GNU Affero General Public License
015 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
016 */
017package cz.hobrasoft.pdfmu;
018
019import java.io.ByteArrayOutputStream;
020import java.io.IOException;
021import java.io.ObjectOutputStream;
022import java.util.LinkedHashMap;
023import java.util.List;
024import java.util.Map;
025import java.util.regex.Matcher;
026import java.util.regex.Pattern;
027import org.apache.commons.codec.binary.Hex;
028
029/**
030 *
031 * @author <a href="mailto:filip.bartek@hobrasoft.cz">Filip Bartek</a>
032 */
033public class PdfmuUtils {
034
035    /**
036     * Converts an array of keys and an array of values to a {@link Map}.
037     *
038     * @param <K> the type of keys.
039     * @param <V> the type of values.
040     * @param keys the array of keys. Only the keys that have a matching value
041     * are used.
042     * @param values the array of values. Only the values that have a matching
043     * key are used.
044     * @return a {@link Map} that contains a key-value pair for each index in
045     * keys and values. The order of the entries is preserved by the underlying
046     * implementation ({@link LinkedHashMap}).
047     */
048    // TODO: Rename
049    public static <K, V> Map<K, V> sortedMap(K[] keys, V[] values) {
050        Map<K, V> result = new LinkedHashMap<>();
051        int n = Math.min(keys.length, values.length);
052        for (int i = 0; i < n; ++i) {
053            result.put(keys[i], values[i]);
054        }
055        return result;
056    }
057
058    // TODO: Rename
059    public static <K, V> Map<K, V> sortedMap(Map.Entry<K, V>... entries) {
060        Map<K, V> result = new LinkedHashMap<>();
061        for (Map.Entry<K, V> entry : entries) {
062            K key = entry.getKey();
063            V value = entry.getValue();
064            result.put(key, value);
065        }
066        return result;
067    }
068
069    /**
070     * Extracts named groups from a matcher.
071     *
072     * @param m the matcher.
073     * @param names the names of the groups.
074     * @return a sorted map that assigns group values to the names.
075     */
076    public static Map<String, String> getMatcherGroups(Matcher m, List<String> names) {
077        assert m != null;
078        assert names != null;
079        Map<String, String> result = new LinkedHashMap<>();
080        for (String name : names) {
081            result.put(name, m.group(name));
082        }
083        return result;
084    }
085}