001 /*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2009 SonarSource SA
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
019 */
020 package org.sonar.api.utils;
021
022 import com.google.common.collect.Multiset;
023 import org.apache.commons.collections.Bag;
024 import org.apache.commons.lang.StringUtils;
025 import org.apache.commons.lang.math.NumberUtils;
026
027 import java.util.HashMap;
028 import java.util.Map;
029
030 /**
031 * Util class to format key/value data. Output is a string representation ready to be
032 * injected into the database
033 *
034 * @since 1.10
035 */
036 public final class KeyValueFormat {
037
038 private KeyValueFormat() {
039 }
040
041 public static <KEY, VALUE> Map<KEY, VALUE> parse(String data, Transformer<KEY, VALUE> transformer) {
042 Map<String, String> rawData = parse(data);
043 Map<KEY, VALUE> map = new HashMap<KEY, VALUE>();
044 for (Map.Entry<String, String> entry : rawData.entrySet()) {
045 KeyValue<KEY, VALUE> keyVal = transformer.transform(entry.getKey(), entry.getValue());
046 if (keyVal != null) {
047 map.put(keyVal.getKey(), keyVal.getValue());
048 }
049 }
050 return map;
051 }
052
053 public static Map<String, String> parse(String data) {
054 Map<String, String> map = new HashMap<String, String>();
055 String[] pairs = StringUtils.split(data, ";");
056 for (String pair : pairs) {
057 String[] keyValue = StringUtils.split(pair, "=");
058 String key = keyValue[0];
059 String value = (keyValue.length == 2 ? keyValue[1] : "");
060 map.put(key, value);
061 }
062 return map;
063 }
064
065 public static <KEY, VALUE> String format(Map<KEY, VALUE> map) {
066 StringBuilder sb = new StringBuilder();
067 boolean first = true;
068 for (Map.Entry<?, ?> entry : map.entrySet()) {
069 if (!first) {
070 sb.append(";");
071 }
072 sb.append(entry.getKey().toString());
073 sb.append("=");
074 if (entry.getValue() != null) {
075 sb.append(entry.getValue());
076 }
077 first = false;
078 }
079
080 return sb.toString();
081 }
082
083 /**
084 * Please use Multiset from google collections instead of commons-collections bags.
085 */
086 public static String format(Bag bag) {
087 return format(bag, 0);
088 }
089
090 /**
091 * Please use Multiset from google collections instead of commons-collections bags.
092 */
093 public static String format(Bag bag, int var) {
094 StringBuilder sb = new StringBuilder();
095 boolean first = true;
096 for (Object obj : bag.uniqueSet()) {
097 if (!first) {
098 sb.append(";");
099 }
100 sb.append(obj.toString());
101 sb.append("=");
102 sb.append(bag.getCount(obj) + var);
103 first = false;
104 }
105
106 return sb.toString();
107 }
108
109 public static String format(Multiset<?> set) {
110 StringBuilder sb = new StringBuilder();
111 boolean first = true;
112 for (Multiset.Entry<?> entry : set.entrySet()) {
113 if (!first) {
114 sb.append(";");
115 }
116 sb.append(entry.getElement().toString());
117 sb.append("=");
118 sb.append(entry.getCount());
119 first = false;
120 }
121 return sb.toString();
122 }
123
124 public static String format(Object... objects) {
125 StringBuilder sb = new StringBuilder();
126 boolean first = true;
127 if (objects != null) {
128 for (int i = 0; i < objects.length; i++) {
129 if (!first) {
130 sb.append(";");
131 }
132 sb.append(objects[i++].toString());
133 sb.append("=");
134 sb.append(objects[i]);
135 first = false;
136 }
137 }
138 return sb.toString();
139 }
140
141 public interface Transformer<KEY, VALUE> {
142
143 public KeyValue<KEY, VALUE> transform(String key, String value);
144 }
145
146 public static class StringNumberPairTransformer implements Transformer<String, Double> {
147
148 public KeyValue<String, Double> transform(String key, String value) {
149 return new KeyValue<String, Double>(key, toDouble(value));
150 }
151 }
152
153 public static class DoubleNumbersPairTransformer implements Transformer<Double, Double> {
154
155 public KeyValue<Double, Double> transform(String key, String value) {
156 return new KeyValue<Double, Double>(toDouble(key), toDouble(value));
157 }
158 }
159
160 public static class IntegerNumbersPairTransformer implements Transformer<Integer, Integer> {
161
162 public KeyValue<Integer, Integer> transform(String key, String value) {
163 return new KeyValue<Integer, Integer>(toInteger(key), toInteger(value));
164 }
165 }
166
167 private static Double toDouble(String value) {
168 return StringUtils.isBlank(value) ? null : NumberUtils.toDouble(value);
169 }
170
171 private static Integer toInteger(String value) {
172 return StringUtils.isBlank(value) ? null : NumberUtils.toInt(value);
173 }
174 }