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 }