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 import org.sonar.api.rules.RulePriority;
027 import org.slf4j.LoggerFactory;
028
029 import java.util.HashMap;
030 import java.util.Map;
031
032 /**
033 * Util class to format key/value data. Output is a string representation ready to be
034 * injected into the database
035 *
036 * @since 1.10
037 */
038 public final class KeyValueFormat {
039
040 private KeyValueFormat() {
041 }
042
043 /**
044 * Transforms a string with the following format : "key1=value1;key2=value2..."
045 * into a Map<KEY, VALUE>. Requires to implement the transform(key,value) method
046 *
047 * @param data the input string
048 * @param transformer the interface to implement
049 * @return a Map of <key, value>
050 */
051 public static <KEY, VALUE> Map<KEY, VALUE> parse(String data, Transformer<KEY, VALUE> transformer) {
052 Map<String, String> rawData = parse(data);
053 Map<KEY, VALUE> map = new HashMap<KEY, VALUE>();
054 for (Map.Entry<String, String> entry : rawData.entrySet()) {
055 KeyValue<KEY, VALUE> keyVal = transformer.transform(entry.getKey(), entry.getValue());
056 if (keyVal != null) {
057 map.put(keyVal.getKey(), keyVal.getValue());
058 }
059 }
060 return map;
061 }
062
063 /**
064 * Transforms a string with the following format : "key1=value1;key2=value2..."
065 * into a Map<String,String>
066 *
067 * @param data the string to parse
068 * @return a map
069 */
070 public static Map<String, String> parse(String data) {
071 Map<String, String> map = new HashMap<String, String>();
072 String[] pairs = StringUtils.split(data, ";");
073 for (String pair : pairs) {
074 String[] keyValue = StringUtils.split(pair, "=");
075 String key = keyValue[0];
076 String value = (keyValue.length == 2 ? keyValue[1] : "");
077 map.put(key, value);
078 }
079 return map;
080 }
081
082 /**
083 * Transforms a map<KEY,VALUE> into a string with the format : "key1=value1;key2=value2..."
084 *
085 * @param map the map to transform
086 * @return the formatted string
087 */
088 public static <KEY, VALUE> String format(Map<KEY, VALUE> map) {
089 StringBuilder sb = new StringBuilder();
090 boolean first = true;
091 for (Map.Entry<?, ?> entry : map.entrySet()) {
092 if (!first) {
093 sb.append(";");
094 }
095 sb.append(entry.getKey().toString());
096 sb.append("=");
097 if (entry.getValue() != null) {
098 sb.append(entry.getValue());
099 }
100 first = false;
101 }
102
103 return sb.toString();
104 }
105
106 /**
107 * @since 1.11
108 * @deprecated use Multiset from google collections instead of commons-collections bags
109 */
110 public static String format(Bag bag) {
111 return format(bag, 0);
112 }
113
114 /**
115 * @since 1.11
116 * @deprecated use Multiset from google collections instead of commons-collections bags
117 */
118 public static String format(Bag bag, int var) {
119 StringBuilder sb = new StringBuilder();
120 if (bag != null) {
121 boolean first = true;
122 for (Object obj : bag.uniqueSet()) {
123 if (!first) {
124 sb.append(";");
125 }
126 sb.append(obj.toString());
127 sb.append("=");
128 sb.append(bag.getCount(obj) + var);
129 first = false;
130 }
131 }
132 return sb.toString();
133 }
134
135 /**
136 * Transforms a Multiset<?> into a string with the format : "key1=count1;key2=count2..."
137 *
138 * @param set the set to transform
139 * @return the formatted string
140 */
141 public static String format(Multiset<?> set) {
142 StringBuilder sb = new StringBuilder();
143 if (set != null) {
144 boolean first = true;
145 for (Multiset.Entry<?> entry : set.entrySet()) {
146 if (!first) {
147 sb.append(";");
148 }
149 sb.append(entry.getElement().toString());
150 sb.append("=");
151 sb.append(entry.getCount());
152 first = false;
153 }
154 }
155 return sb.toString();
156 }
157
158 /**
159 * Transforms a Object... into a string with the format : "object1=object2;object3=object4..."
160 *
161 * @param objects the object list to transform
162 * @return the formatted string
163 */
164 public static String format(Object... objects) {
165 StringBuilder sb = new StringBuilder();
166 boolean first = true;
167 if (objects != null) {
168 for (int i = 0; i < objects.length; i++) {
169 if (!first) {
170 sb.append(";");
171 }
172 sb.append(objects[i++].toString());
173 sb.append("=");
174 sb.append(objects[i]);
175 first = false;
176 }
177 }
178 return sb.toString();
179 }
180
181 public interface Transformer<KEY, VALUE> {
182 KeyValue<KEY, VALUE> transform(String key, String value);
183 }
184
185 /**
186 * Implementation of Transformer<String, Double>
187 */
188 public static class StringNumberPairTransformer implements Transformer<String, Double> {
189
190 public KeyValue<String, Double> transform(String key, String value) {
191 return new KeyValue<String, Double>(key, toDouble(value));
192 }
193 }
194
195 /**
196 * Implementation of Transformer<Double, Double>
197 */
198 public static class DoubleNumbersPairTransformer implements Transformer<Double, Double> {
199
200 public KeyValue<Double, Double> transform(String key, String value) {
201 return new KeyValue<Double, Double>(toDouble(key), toDouble(value));
202 }
203 }
204
205 /**
206 * Implementation of Transformer<Integer, Integer>
207 */
208 public static class IntegerNumbersPairTransformer implements Transformer<Integer, Integer> {
209
210 public KeyValue<Integer, Integer> transform(String key, String value) {
211 return new KeyValue<Integer, Integer>(toInteger(key), toInteger(value));
212 }
213 }
214
215 /**
216 * Implementation of Transformer<RulePriority, Integer>
217 */
218 public static class RulePriorityNumbersPairTransformer implements Transformer<RulePriority, Integer> {
219
220 public KeyValue<RulePriority, Integer> transform(String key, String value) {
221 try {
222 if (StringUtils.isBlank(value)) {
223 value = "0";
224 }
225 return new KeyValue<RulePriority, Integer>(RulePriority.valueOf(key.toUpperCase()), Integer.parseInt(value));
226 }
227 catch (Exception e) {
228 LoggerFactory.getLogger(RulePriorityNumbersPairTransformer.class).warn("Property " + key + " has invalid value: " + value, e);
229 return null;
230 }
231 }
232 }
233
234 private static Double toDouble(String value) {
235 return StringUtils.isBlank(value) ? null : NumberUtils.toDouble(value);
236 }
237
238 private static Integer toInteger(String value) {
239 return StringUtils.isBlank(value) ? null : NumberUtils.toInt(value);
240 }
241 }