| 1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
| 2 | * |
| 3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
| 4 | * |
| 5 | * "Hilbert II" is free software; you can redistribute |
| 6 | * it and/or modify it under the terms of the GNU General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | package org.qedeq.kernel.xml.handler.common; |
| 17 | |
| 18 | import java.text.DateFormat; |
| 19 | import java.text.ParseException; |
| 20 | import java.text.SimpleDateFormat; |
| 21 | import java.util.Date; |
| 22 | import java.util.HashMap; |
| 23 | import java.util.Iterator; |
| 24 | import java.util.Map; |
| 25 | import java.util.SortedMap; |
| 26 | import java.util.TreeMap; |
| 27 | |
| 28 | |
| 29 | /** |
| 30 | * Value object that contains unsorted key value pairs. Both arguments are string type, but there |
| 31 | * are access methods for different data types. If the type conversion in not possible an |
| 32 | * appropriate {@link RuntimeException} is thrown. |
| 33 | * <p> |
| 34 | * With {@link #add} another key value pair is added. An {@link IllegalArgumentException} is thrown, |
| 35 | * if the key is already known. |
| 36 | * |
| 37 | * @author Michael Meyling |
| 38 | */ |
| 39 | public class SimpleAttributes { |
| 40 | |
| 41 | /** Key value storage. */ |
| 42 | private Map map = new HashMap(); |
| 43 | |
| 44 | /** |
| 45 | * Adds a key value pair. This key must be still unknown. |
| 46 | * |
| 47 | * @param key Key. |
| 48 | * @param value Value, maybe <code>null</code>. |
| 49 | */ |
| 50 | public final void add(final String key, final String value) { |
| 51 | if (map.containsKey(key)) { |
| 52 | throw new IllegalArgumentException( |
| 53 | "Key " + key + " already known with value: " + map.get(key)); |
| 54 | } |
| 55 | map.put(key, value); |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Returns the value for a key. If the key dosn't exist <code>null</code> is returned. |
| 60 | * |
| 61 | * @param key Key. |
| 62 | * @return Associated value. |
| 63 | */ |
| 64 | public final String getString(final String key) { |
| 65 | return (String) map.get(key); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Returns the value for a key as an Integer. If the key dosn't exist |
| 70 | * <code>null</code> is returned. |
| 71 | * If the value must be transformable into an Integer value. |
| 72 | * |
| 73 | * @param key Key. |
| 74 | * @return Associated value converted into an Integer. |
| 75 | */ |
| 76 | public final Integer getInteger(final String key) { |
| 77 | String value = (String) map.get(key); |
| 78 | if (value != null) { |
| 79 | value = value.trim(); |
| 80 | } |
| 81 | if (value == null || value.length() == 0) { |
| 82 | return null; |
| 83 | } |
| 84 | return new Integer(value); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Returns the value for a key as an Boolean. If the key dosn't exist |
| 89 | * <code>null</code> is returned. |
| 90 | * If the value must be transformable into an Boolean value. |
| 91 | * |
| 92 | * @param key Key. |
| 93 | * @return Associated value converted into an Boolean. |
| 94 | */ |
| 95 | public final Boolean getBoolean(final String key) { |
| 96 | String value = ((String) map.get(key)); |
| 97 | if (value != null) { |
| 98 | value = value.trim(); |
| 99 | } |
| 100 | if (value == null || value.length() == 0) { |
| 101 | return null; |
| 102 | } |
| 103 | return Boolean.valueOf(value); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Returns the value for a key as an Date. If the key dosn't exist |
| 108 | * <code>null</code> is returned. |
| 109 | * If the value must be transformable into an Date value. |
| 110 | * The expected date format is "yyyy-MM-dd'T'HH:mm:ss". |
| 111 | * |
| 112 | * @param key Key. |
| 113 | * @return Associated value converted into an Date. |
| 114 | */ |
| 115 | public final Date getDate(final String key) { |
| 116 | String value = (String) map.get(key); |
| 117 | if (value != null) { |
| 118 | value = value.trim(); |
| 119 | } |
| 120 | if (value == null || value.length() == 0) { |
| 121 | return null; |
| 122 | } |
| 123 | try { |
| 124 | DateFormat formater = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"); |
| 125 | Date date = formater.parse(value); |
| 126 | return date; |
| 127 | } catch (ParseException e) { |
| 128 | throw new IllegalArgumentException(e.toString()); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Get the attribute values, sorted by their keys. |
| 134 | * |
| 135 | * @return Key sorted string values. |
| 136 | */ |
| 137 | public final String[] getKeySortedStringValues() { |
| 138 | SortedMap sorted = new TreeMap(map); |
| 139 | return (String[]) sorted.values().toArray(new String[0]); |
| 140 | } |
| 141 | |
| 142 | public String toString() { |
| 143 | final StringBuffer buffer = new StringBuffer(); |
| 144 | final Iterator iterator = map.entrySet().iterator(); |
| 145 | while (iterator.hasNext()) { |
| 146 | Map.Entry entry = (Map.Entry) iterator.next(); |
| 147 | buffer.append(entry.getKey() + "=\"" + entry.getValue() + "\" "); |
| 148 | } |
| 149 | return buffer.toString(); |
| 150 | } |
| 151 | |
| 152 | } |