common/onap-common-configuration-management/onap-configuration-management-core/src/main/java/org/onap/config/ConfigurationUtils.java

   1 /*
   2  * Copyright © 2016-2018 European Support Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.onap.config;
  18
  19 import static java.util.Optional.ofNullable;
  20 import static org.onap.config.api.Hint.EXTERNAL_LOOKUP;
  21 import static org.onap.config.api.Hint.LATEST_LOOKUP;
  22 import static org.onap.config.api.Hint.NODE_SPECIFIC;
  23
  24 import com.virtlink.commons.configuration2.jackson.JsonConfiguration;
  25 import java.io.File;
  26 import java.lang.reflect.Field;
  27 import java.lang.reflect.ParameterizedType;
  28 import java.lang.reflect.Type;
  29 import java.net.URL;
  30 import java.nio.file.Files;
  31 import java.nio.file.Path;
  32 import java.util.ArrayDeque;
  33 import java.util.ArrayList;
  34 import java.util.Arrays;
  35 import java.util.Collection;
  36 import java.util.Collections;
  37 import java.util.Deque;
  38 import java.util.HashMap;
  39 import java.util.HashSet;
  40 import java.util.Iterator;
  41 import java.util.LinkedHashMap;
  42 import java.util.List;
  43 import java.util.Map;
  44 import java.util.Optional;
  45 import java.util.Queue;
  46 import java.util.Set;
  47 import java.util.SortedSet;
  48 import java.util.TreeSet;
  49 import java.util.concurrent.BlockingQueue;
  50 import java.util.concurrent.ConcurrentLinkedQueue;
  51 import java.util.concurrent.LinkedBlockingQueue;
  52 import java.util.concurrent.LinkedTransferQueue;
  53 import java.util.concurrent.TransferQueue;
  54 import java.util.regex.Matcher;
  55 import java.util.regex.Pattern;
  56 import java.util.stream.Collectors;
  57 import java.util.stream.Stream;
  58 import net.sf.corn.cps.CPScanner;
  59 import net.sf.corn.cps.ResourceFilter;
  60 import org.apache.commons.configuration2.CompositeConfiguration;
  61 import org.apache.commons.configuration2.Configuration;
  62 import org.apache.commons.configuration2.FileBasedConfiguration;
  63 import org.apache.commons.configuration2.PropertiesConfiguration;
  64 import org.apache.commons.configuration2.XMLConfiguration;
  65 import org.apache.commons.configuration2.builder.BasicConfigurationBuilder;
  66 import org.apache.commons.configuration2.builder.ReloadingFileBasedConfigurationBuilder;
  67 import org.apache.commons.configuration2.builder.fluent.Configurations;
  68 import org.apache.commons.configuration2.builder.fluent.Parameters;
  69 import org.apache.commons.configuration2.convert.DefaultListDelimiterHandler;
  70 import org.apache.commons.configuration2.ex.ConfigurationException;
  71 import org.apache.commons.io.IOUtils;
  72 import org.onap.config.api.Config;
  73 import org.onap.config.api.ConfigurationManager;
  74 import org.onap.config.impl.AgglomerateConfiguration;
  75 import org.onap.config.impl.ConfigurationRepository;
  76 import org.onap.config.impl.YamlConfiguration;
  77 import org.onap.config.type.ConfigurationMode;
  78 import org.onap.config.type.ConfigurationType;
  79 import org.slf4j.Logger;
  80 import org.slf4j.LoggerFactory;
  81
  82 public class ConfigurationUtils {
  83
  84     private static final Logger LOGGER = LoggerFactory.getLogger(ConfigurationUtils.class);
  85     private static final String CONFIGURATION_TYPE_NOT_SUPPORTED = "Configuration type not supported:";
  86     private static final Map<Class, Class> ARRAY_CLASS_MAP;
  87
  88     static {
  89         Map<Class, Class> arrayTypes = new HashMap<>();
  90         arrayTypes.put(Byte.class, Byte[].class);
  91         arrayTypes.put(Short.class, Short[].class);
  92         arrayTypes.put(Integer.class, Integer[].class);
  93         arrayTypes.put(Long.class, Long[].class);
  94         arrayTypes.put(Float.class, Float[].class);
  95         arrayTypes.put(Double.class, Double[].class);
  96         arrayTypes.put(Boolean.class, Boolean[].class);
  97         arrayTypes.put(Character.class, Character[].class);
  98         arrayTypes.put(String.class, String[].class);
  99         ARRAY_CLASS_MAP = Collections.unmodifiableMap(arrayTypes);
 100     }
 101
 102     private ConfigurationUtils() {
 103         // prevent instantiation
 104     }
 105
 106     public static Collection<File> getAllFiles(File file, boolean recursive, boolean onlyDirectory) {
 107         ArrayList<File> collection = new ArrayList<>();
 108         if (file.isDirectory() && file.exists()) {
 109             File[] files = file.listFiles();
 110             for (File innerFile : files) {
 111                 if (innerFile.isFile() && !onlyDirectory) {
 112                     collection.add(innerFile);
 113                 } else if (innerFile.isDirectory()) {
 114                     collection.add(innerFile);
 115                     if (recursive) {
 116                         collection.addAll(getAllFiles(innerFile, recursive, onlyDirectory));
 117                     }
 118                 }
 119             }
 120         }
 121         return collection;
 122     }
 123
 124     public static String getCommaSeparatedList(String[] list) {
 125         return getCommaSeparatedList(list == null ? Collections.emptyList() : Arrays.asList(list));
 126     }
 127
 128     public static String getCommaSeparatedList(List list) {
 129         return ((Stream<String>) list.stream().filter(o -> o != null && !o.toString().trim().isEmpty())
 130                                          .map(o -> o.toString().trim())).collect(Collectors.joining(","));
 131     }
 132
 133     public static boolean isConfig(URL url) {
 134         return isConfig(url.getFile());
 135     }
 136
 137     public static boolean isConfig(String file) {
 138         file = file.toUpperCase().substring(file.lastIndexOf('!') + 1);
 139         file = file.substring(file.lastIndexOf('/') + 1);
 140         return file.matches(
 141                 "CONFIG(-\\w*){0,1}(-" + "(" + ConfigurationMode.OVERRIDE + "|" + ConfigurationMode.MERGE + "|"
 142                         + ConfigurationMode.UNION + ")){0,1}" + "\\.(" + ConfigurationType.PROPERTIES.name() + "|"
 143                         + ConfigurationType.XML.name() + "|" + ConfigurationType.JSON.name() + "|"
 144                         + ConfigurationType.YAML.name() + ")$") || file.matches(
 145                 "CONFIG(.)*\\.(" + ConfigurationType.PROPERTIES.name() + "|" + ConfigurationType.XML.name() + "|"
 146                         + ConfigurationType.JSON.name() + "|" + ConfigurationType.YAML.name() + ")$");
 147     }
 148
 149     public static boolean isConfig(File file) {
 150         return file != null && file.exists() && isConfig(file.getName());
 151     }
 152
 153     private static Optional<String> getNamespace(Configuration config) {
 154         return ofNullable(config).flatMap(configuration -> ofNullable(configuration.getString(Constants.NAMESPACE_KEY)))
 155                        .map(String::toUpperCase);
 156     }
 157
 158     public static ConfigurationMode getMergeStrategy(URL url) {
 159         Optional<ConfigurationMode> configurationMode =
 160                 getConfiguration(url).flatMap(ConfigurationUtils::getMergeStrategy)
 161                         .flatMap(ConfigurationUtils::convertConfigurationMode);
 162         return configurationMode.orElseGet(() -> getMergeStrategy(url.getFile().toUpperCase()));
 163     }
 164
 165     public static Optional<FileBasedConfiguration> getConfiguration(URL url) {
 166         FileBasedConfiguration builder = null;
 167         try {
 168             ConfigurationType configType = ConfigurationUtils.getConfigType(url);
 169             switch (configType) {
 170                 case PROPERTIES:
 171                     builder = new Configurations().fileBased(PropertiesConfiguration.class, url);
 172                     break;
 173                 case XML:
 174                     builder = new Configurations().fileBased(XMLConfiguration.class, url);
 175                     break;
 176                 case JSON:
 177                     builder = new Configurations().fileBased(JsonConfiguration.class, url);
 178                     break;
 179                 case YAML:
 180                     builder = new Configurations().fileBased(YamlConfiguration.class, url);
 181                     break;
 182                 default:
 183                     throw new ConfigurationException(CONFIGURATION_TYPE_NOT_SUPPORTED + configType);
 184             }
 185         } catch (ConfigurationException exception) {
 186             exception.printStackTrace();
 187         }
 188         return ofNullable(builder);
 189     }
 190
 191     public static ConfigurationMode getMergeStrategy(String file) {
 192         file = file.toUpperCase().substring(file.lastIndexOf('!') + 1);
 193         file = file.substring(file.lastIndexOf('/') + 1);
 194         Pattern pattern = Pattern.compile(
 195                 "CONFIG(-\\w*){0,1}(-" + "(" + ConfigurationMode.OVERRIDE + "|" + ConfigurationMode.MERGE + "|"
 196                         + ConfigurationMode.UNION + ")){0,1}" + "\\.(" + ConfigurationType.PROPERTIES.name() + "|"
 197                         + ConfigurationType.XML.name() + "|" + ConfigurationType.JSON.name() + "|"
 198                         + ConfigurationType.YAML.name() + ")$");
 199         Matcher matcher = pattern.matcher(file);
 200         boolean b1 = matcher.matches();
 201         if (b1) {
 202             for (int i = 1; i <= matcher.groupCount(); i++) {
 203                 String modeName = matcher.group(i);
 204                 if (modeName != null) {
 205                     modeName = modeName.substring(1);
 206                 }
 207                 try {
 208                     return Enum.valueOf(ConfigurationMode.class, modeName);
 209                 } catch (Exception exception) {
 210                     //do nothing
 211                 }
 212             }
 213         }
 214
 215         return null;
 216     }
 217
 218     public static ConfigurationType getConfigType(URL url) {
 219         return Enum.valueOf(ConfigurationType.class,
 220                 url.getFile().substring(url.getFile().lastIndexOf('.') + 1).toUpperCase());
 221     }
 222
 223     private static Optional<ConfigurationMode> convertConfigurationMode(String configMode) {
 224         ConfigurationMode configurationMode = null;
 225         try {
 226             configurationMode = ConfigurationMode.valueOf(configMode);
 227         } catch (Exception exception) {
 228             LOGGER.error("Could not find convert {} into configuration mode", configMode);
 229         }
 230         return Optional.ofNullable(configurationMode);
 231     }
 232
 233     private static Optional<String> getMergeStrategy(Configuration config) {
 234         return ofNullable(config).flatMap(configuration -> ofNullable(configuration.getString(Constants.MODE_KEY)))
 235                        .map(String::toUpperCase);
 236     }
 237
 238     public static ConfigurationMode getMergeStrategy(File file) {
 239         Optional<ConfigurationMode> configurationMode =
 240                 getConfiguration(file).flatMap(ConfigurationUtils::getMergeStrategy)
 241                         .flatMap(ConfigurationUtils::convertConfigurationMode);
 242         return configurationMode.orElseGet(() -> getMergeStrategy(file.getName().toUpperCase()));
 243     }
 244
 245     public static Optional<FileBasedConfiguration> getConfiguration(File file) {
 246         FileBasedConfiguration builder = null;
 247         try {
 248             ConfigurationType configType = ConfigurationUtils.getConfigType(file);
 249             switch (configType) {
 250                 case PROPERTIES:
 251                     builder = new Configurations().fileBased(PropertiesConfiguration.class, file);
 252                     break;
 253                 case XML:
 254                     builder = new Configurations().fileBased(XMLConfiguration.class, file);
 255                     break;
 256                 case JSON:
 257                     builder = new Configurations().fileBased(JsonConfiguration.class, file);
 258                     break;
 259                 case YAML:
 260                     builder = new Configurations().fileBased(YamlConfiguration.class, file);
 261                     break;
 262                 default:
 263                     throw new ConfigurationException(CONFIGURATION_TYPE_NOT_SUPPORTED + configType);
 264             }
 265         } catch (ConfigurationException exception) {
 266             exception.printStackTrace();
 267         }
 268         return ofNullable(builder);
 269     }
 270
 271     public static ConfigurationType getConfigType(File file) {
 272         return Enum.valueOf(ConfigurationType.class,
 273                 file.getAbsolutePath().substring(file.getAbsolutePath().lastIndexOf('.') + 1).toUpperCase());
 274     }
 275
 276     public static Class getCollectionGenericType(Field field) {
 277         Type type = field.getGenericType();
 278
 279         if (type instanceof ParameterizedType) {
 280
 281             ParameterizedType paramType = (ParameterizedType) type;
 282             Type[] arr = paramType.getActualTypeArguments();
 283             if (arr.length > 0) {
 284                 Class<?> clazz = (Class<?>) arr[0];
 285                 if (isWrapperClass(clazz)) {
 286                     return clazz;
 287                 } else {
 288                     throw new RuntimeException("Collection of type " + clazz.getName() + " not supported.");
 289                 }
 290             }
 291         }
 292
 293         return String[].class;
 294     }
 295
 296     public static boolean isWrapperClass(Class clazz) {
 297         return clazz == String.class || clazz == Boolean.class || clazz == Character.class || Number.class
 298                                                                                                       .isAssignableFrom(
 299                                                                                                               clazz);
 300     }
 301
 302     public static Class getArrayClass(Class clazz) {
 303         return ARRAY_CLASS_MAP.getOrDefault(clazz, null);
 304     }
 305
 306     public static List<URL> getAllClassPathResources() {
 307         return CPScanner.scanResources(new ResourceFilter());
 308     }
 309
 310     public static BasicConfigurationBuilder<FileBasedConfiguration> getConfigurationBuilder(URL url) {
 311         ConfigurationType configType = ConfigurationUtils.getConfigType(url);
 312         ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> builder =
 313                 getFileBasedConfigurationReloadingFileBasedConfigurationBuilder(configType);
 314         builder.configure(
 315                 new Parameters().fileBased().setURL(url).setListDelimiterHandler(new DefaultListDelimiterHandler(',')));
 316         return builder;
 317     }
 318
 319     private static ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> getFileBasedConfigurationReloadingFileBasedConfigurationBuilder(
 320             ConfigurationType configType) {
 321
 322         ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> builder;
 323         switch (configType) {
 324             case PROPERTIES:
 325                 builder = new ReloadingFileBasedConfigurationBuilder<>(PropertiesConfiguration.class);
 326                 break;
 327             case XML:
 328                 builder = new ReloadingFileBasedConfigurationBuilder<>(XMLConfiguration.class);
 329                 break;
 330             case JSON:
 331                 builder = new ReloadingFileBasedConfigurationBuilder<>(JsonConfiguration.class);
 332                 break;
 333             case YAML:
 334                 builder = new ReloadingFileBasedConfigurationBuilder<>(YamlConfiguration.class);
 335                 break;
 336             default:
 337                 throw new IllegalArgumentException(CONFIGURATION_TYPE_NOT_SUPPORTED + configType);
 338         }
 339         return builder;
 340     }
 341
 342     public static BasicConfigurationBuilder<FileBasedConfiguration> getConfigurationBuilder(File file,
 343             boolean autoSave) {
 344         ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> builder;
 345         ConfigurationType configType = ConfigurationUtils.getConfigType(file);
 346         builder = getFileBasedConfigurationReloadingFileBasedConfigurationBuilder(configType);
 347         builder.configure(new Parameters().fileBased().setFile(file)
 348                                   .setListDelimiterHandler(new DefaultListDelimiterHandler(',')));
 349         builder.setAutoSave(autoSave);
 350         return builder;
 351     }
 352
 353     public static <T> T read(Configuration config, Class<T> clazz, String keyPrefix) throws Exception {
 354         Config confAnnotation = clazz.getAnnotation(Config.class);
 355         if (confAnnotation != null) {
 356             keyPrefix += (confAnnotation.key() + ".");
 357         }
 358         T objToReturn = clazz.newInstance();
 359         for (Field field : clazz.getDeclaredFields()) {
 360             Config fieldAnnotation = field.getAnnotation(Config.class);
 361             if (fieldAnnotation != null) {
 362                 field.setAccessible(true);
 363                 field.set(objToReturn, config.getProperty(keyPrefix + fieldAnnotation.key()));
 364             } else if (field.getType().getAnnotation(Config.class) != null) {
 365                 field.set(objToReturn, read(config, field.getType(), keyPrefix));
 366             }
 367         }
 368         return objToReturn;
 369     }
 370
 371     public static Object getPrimitiveArray(Collection collection, Class clazz) {
 372         if (clazz == int.class) {
 373             int[] array = new int[collection.size()];
 374             Object[] objArray = collection.toArray();
 375             for (int i = 0; i < collection.size(); i++) {
 376                 array[i] = (int) objArray[i];
 377             }
 378             return array;
 379         }
 380         if (clazz == byte.class) {
 381             byte[] array = new byte[collection.size()];
 382             Object[] objArray = collection.toArray();
 383             for (int i = 0; i < collection.size(); i++) {
 384                 array[i] = (byte) objArray[i];
 385             }
 386             return array;
 387         }
 388         if (clazz == short.class) {
 389             short[] array = new short[collection.size()];
 390             Object[] objArray = collection.toArray();
 391             for (int i = 0; i < collection.size(); i++) {
 392                 array[i] = (short) objArray[i];
 393             }
 394             return array;
 395         }
 396         if (clazz == long.class) {
 397             long[] array = new long[collection.size()];
 398             Object[] objArray = collection.toArray();
 399             for (int i = 0; i < collection.size(); i++) {
 400                 array[i] = (long) objArray[i];
 401             }
 402             return array;
 403         }
 404         if (clazz == float.class) {
 405             float[] array = new float[collection.size()];
 406             Object[] objArray = collection.toArray();
 407             for (int i = 0; i < collection.size(); i++) {
 408                 array[i] = (float) objArray[i];
 409             }
 410             return array;
 411         }
 412         if (clazz == double.class) {
 413             double[] array = new double[collection.size()];
 414             Object[] objArray = collection.toArray();
 415             for (int i = 0; i < collection.size(); i++) {
 416                 array[i] = (double) objArray[i];
 417             }
 418             return array;
 419         }
 420         if (clazz == boolean.class) {
 421             boolean[] array = new boolean[collection.size()];
 422             Object[] objArray = collection.toArray();
 423             for (int i = 0; i < collection.size(); i++) {
 424                 array[i] = (boolean) objArray[i];
 425             }
 426             return array;
 427         }
 428         return null;
 429     }
 430
 431     public static String getCollectionString(String input) {
 432         Pattern pattern = Pattern.compile("^\\[(.*)\\]$");
 433         Matcher matcher = pattern.matcher(input);
 434         if (matcher.matches()) {
 435             input = matcher.group(1);
 436         }
 437         return input;
 438     }
 439
 440     public static String processVariablesIfPresent(String tenant, String namespace, String data) {
 441         Pattern pattern = Pattern.compile("^.*\\$\\{(.*)\\}.*");
 442         Matcher matcher = pattern.matcher(data);
 443         if (matcher.matches()) {
 444             String key = matcher.group(1);
 445             if (key.toUpperCase().startsWith("ENV:")) {
 446                 String envValue = System.getenv(key.substring(4));
 447                 return processVariablesIfPresent(tenant, namespace, data.replaceAll("\\$\\{" + key + "\\}",
 448                         envValue == null ? "" : envValue.replace("\\", "\\\\")));
 449             } else if (key.toUpperCase().startsWith("SYS:")) {
 450                 String sysValue = System.getProperty(key.substring(4));
 451                 return processVariablesIfPresent(tenant, namespace, data.replaceAll("\\$\\{" + key + "\\}",
 452                         sysValue == null ? "" : sysValue.replace("\\", "\\\\")));
 453             } else {
 454                 String propertyValue = ConfigurationUtils.getCollectionString(
 455                         ConfigurationManager.lookup().getAsStringValues(tenant, namespace, key).toString());
 456                 return processVariablesIfPresent(tenant, namespace, data.replaceAll("\\$\\{" + key + "\\}",
 457                         propertyValue == null ? "" : propertyValue.replace("\\", "\\\\")));
 458             }
 459         } else {
 460             return data;
 461         }
 462     }
 463
 464     public static String getFileContents(String path) {
 465         try {
 466             if (path != null) {
 467                 return IOUtils.toString(new URL(path));
 468             }
 469         } catch (Exception exception) {
 470             exception.printStackTrace();
 471         }
 472         return null;
 473     }
 474
 475     public static String getFileContents(Path path) {
 476         try {
 477             if (path != null) {
 478                 return new String(Files.readAllBytes(path));
 479             }
 480         } catch (Exception exception) {
 481             exception.printStackTrace();
 482         }
 483         return null;
 484     }
 485
 486     public static Object getDefaultFor(Class clazz) {
 487         if (byte.class == clazz) {
 488             return new Byte("0");
 489         } else if (short.class == clazz) {
 490             return new Short("0");
 491         } else if (int.class == clazz) {
 492             return new Integer("0");
 493         } else if (float.class == clazz) {
 494             return new Float("0");
 495         } else if (long.class == clazz) {
 496             return new Long("0");
 497         } else if (double.class == clazz) {
 498             return new Double("0");
 499         } else if (boolean.class == clazz) {
 500             return Boolean.FALSE;
 501         }
 502         return (char) 0;
 503     }
 504
 505     public static Collection getCompatibleCollectionForAbstractDef(Class clazz) {
 506         if (BlockingQueue.class.isAssignableFrom(clazz)) {
 507             return getConcreteCollection(BlockingQueue.class);
 508         }
 509         if (TransferQueue.class.isAssignableFrom(clazz)) {
 510             return getConcreteCollection(TransferQueue.class);
 511         }
 512         if (Deque.class.isAssignableFrom(clazz)) {
 513             return getConcreteCollection(Deque.class);
 514         }
 515         if (Queue.class.isAssignableFrom(clazz)) {
 516             return getConcreteCollection(Queue.class);
 517         }
 518         if (SortedSet.class.isAssignableFrom(clazz)) {
 519             return getConcreteCollection(SortedSet.class);
 520         }
 521         if (Set.class.isAssignableFrom(clazz)) {
 522             return getConcreteCollection(Set.class);
 523         }
 524         if (List.class.isAssignableFrom(clazz)) {
 525             return getConcreteCollection(List.class);
 526         }
 527         return null;
 528     }
 529
 530     public static Collection getConcreteCollection(Class clazz) {
 531         switch (clazz.getName()) {
 532             case "java.util.Collection":
 533             case "java.util.List":
 534                 return new ArrayList<>();
 535             case "java.util.Set":
 536                 return new HashSet<>();
 537             case "java.util.SortedSet":
 538                 return new TreeSet<>();
 539             case "java.util.Queue":
 540                 return new ConcurrentLinkedQueue<>();
 541             case "java.util.Deque":
 542                 return new ArrayDeque<>();
 543             case "java.util.concurrent.TransferQueue":
 544                 return new LinkedTransferQueue<>();
 545             case "java.util.concurrent.BlockingQueue":
 546                 return new LinkedBlockingQueue<>();
 547             default:
 548                 return null;
 549         }
 550     }
 551
 552     public static String getConfigurationRepositoryKey(File file) {
 553         return getConfigurationRepositoryKey(
 554                 ConfigurationUtils.getNamespace(file).split(Constants.TENANT_NAMESPACE_SEPARATOR));
 555     }
 556
 557     public static String getConfigurationRepositoryKey(String[] array) {
 558         Deque<String> stack = new ArrayDeque<>();
 559         stack.push(Constants.DEFAULT_TENANT);
 560         for (String element : array) {
 561             stack.push(element);
 562         }
 563         String toReturn = stack.pop();
 564         return stack.pop() + Constants.KEY_ELEMENTS_DELIMITER + toReturn;
 565     }
 566
 567     public static String getNamespace(File file) {
 568         Optional<String> namespace =
 569                 getConfiguration(file).flatMap(ConfigurationUtils::getNamespace).map(String::toUpperCase);
 570         return namespace.orElseGet(() -> getNamespace(file.getName().toUpperCase()));
 571     }
 572
 573     public static String getNamespace(String file) {
 574         file = file.toUpperCase().substring(file.lastIndexOf('!') + 1);
 575         file = file.substring(file.lastIndexOf('/') + 1);
 576         Pattern pattern = Pattern.compile(
 577                 "CONFIG(-\\w*){0,1}(-" + "(" + ConfigurationMode.OVERRIDE + "|" + ConfigurationMode.MERGE + "|"
 578                         + ConfigurationMode.UNION + ")){0,1}" + "\\.(" + ConfigurationType.PROPERTIES.name() + "|"
 579                         + ConfigurationType.XML.name() + "|" + ConfigurationType.JSON.name() + "|"
 580                         + ConfigurationType.YAML.name() + ")$");
 581         Matcher matcher = pattern.matcher(file);
 582         boolean b1 = matcher.matches();
 583         if (b1) {
 584             if (matcher.group(1) != null) {
 585                 String moduleName = matcher.group(1).substring(1);
 586                 return moduleName.equalsIgnoreCase(ConfigurationMode.OVERRIDE.name()) || moduleName.equalsIgnoreCase(
 587                         ConfigurationMode.UNION.name()) || moduleName.equalsIgnoreCase(ConfigurationMode.MERGE.name())
 588                                ? Constants.DEFAULT_NAMESPACE : moduleName;
 589             } else {
 590                 return Constants.DEFAULT_NAMESPACE;
 591             }
 592         } else if (isConfig(file)) {
 593             return Constants.DEFAULT_NAMESPACE;
 594         }
 595
 596         return null;
 597     }
 598
 599     public static String getConfigurationRepositoryKey(URL url) {
 600         return getConfigurationRepositoryKey(
 601                 ConfigurationUtils.getNamespace(url).split(Constants.TENANT_NAMESPACE_SEPARATOR));
 602     }
 603
 604     public static String getNamespace(URL url) {
 605
 606         Optional<String> namespace =
 607                 getConfiguration(url).flatMap(ConfigurationUtils::getNamespace).map(String::toUpperCase);
 608
 609         return namespace.orElseGet(() -> getNamespace(url.getFile().toUpperCase()));
 610     }
 611
 612     public static LinkedHashMap toMap(Configuration config) {
 613         Iterator<String> iterator = config.getKeys();
 614         LinkedHashMap<String, String> map = new LinkedHashMap<>();
 615         while (iterator.hasNext()) {
 616             String key = iterator.next();
 617             if (!(key.equals(Constants.MODE_KEY) || key.equals(Constants.NAMESPACE_KEY) || key.equals(
 618                     Constants.LOAD_ORDER_KEY))) {
 619                 map.put(key, config.getProperty(key).toString());
 620             }
 621         }
 622
 623         return map;
 624     }
 625
 626     public static Map diff(LinkedHashMap orig, LinkedHashMap latest) {
 627         orig = new LinkedHashMap<>(orig);
 628         latest = new LinkedHashMap<>(latest);
 629         List<String> set = new ArrayList(orig.keySet());
 630         for (String key : set) {
 631             if (latest.remove(key, orig.get(key))) {
 632                 orig.remove(key);
 633             }
 634         }
 635         Set<String> keys = latest.keySet();
 636         for (String key : keys) {
 637             orig.remove(key);
 638         }
 639         set = new ArrayList(orig.keySet());
 640         for (String key : set) {
 641             latest.put(key, "");
 642         }
 643         return new HashMap<>(latest);
 644     }
 645
 646     public static boolean isArray(String tenant, String namespace, String key, int processingHints) throws Exception {
 647         Object obj = ConfigurationUtils
 648                              .getProperty(ConfigurationRepository.lookup().getConfigurationFor(tenant, namespace), key,
 649                                      processingHints);
 650         return (obj != null) && ConfigurationUtils.isCollection(obj.toString());
 651     }
 652
 653     public static Object getProperty(Configuration config, String key, int processingHints) {
 654         if (!isDirectLookup(processingHints)) {
 655             if (config instanceof AgglomerateConfiguration) {
 656                 return ((AgglomerateConfiguration) config).getPropertyValue(key);
 657             } else if (config instanceof CompositeConfiguration) {
 658                 CompositeConfiguration conf = (CompositeConfiguration) config;
 659                 for (int i = 0; i < conf.getNumberOfConfigurations(); i++) {
 660                     if (conf.getConfiguration(i) instanceof AgglomerateConfiguration) {
 661                         return ((AgglomerateConfiguration) conf.getConfiguration(i)).getPropertyValue(key);
 662                     } else if (isNodeSpecific(processingHints)) {
 663                         Object obj = conf.getConfiguration(i).getProperty(key);
 664                         if (obj != null) {
 665                             return obj;
 666                         }
 667                     }
 668                 }
 669             }
 670         }
 671         return config.getProperty(key);
 672     }
 673
 674     public static boolean isCollection(String input) {
 675         Pattern pattern = Pattern.compile("^\\[(.*)\\]$");
 676         Matcher matcher = pattern.matcher(input);
 677         return matcher.matches();
 678     }
 679
 680     public static boolean isDirectLookup(int hints) {
 681         return (hints & LATEST_LOOKUP.value()) == LATEST_LOOKUP.value();
 682     }
 683
 684     public static boolean isNodeSpecific(int hints) {
 685         return (hints & NODE_SPECIFIC.value()) == NODE_SPECIFIC.value();
 686     }
 687
 688     public static boolean isExternalLookup(int hints) {
 689         return (hints & EXTERNAL_LOOKUP.value()) == EXTERNAL_LOOKUP.value();
 690     }
 691
 692     public static boolean isZeroLengthArray(Class clazz, Object obj) {
 693         if (clazz.isArray() && clazz.getComponentType().isPrimitive()) {
 694             if (clazz.getComponentType() == int.class) {
 695                 return ((int[]) obj).length == 0;
 696             } else if (clazz.getComponentType() == byte.class) {
 697                 return ((byte[]) obj).length == 0;
 698             } else if (clazz.getComponentType() == short.class) {
 699                 return ((short[]) obj).length == 0;
 700             } else if (clazz.getComponentType() == float.class) {
 701                 return ((float[]) obj).length == 0;
 702             } else if (clazz.getComponentType() == boolean.class) {
 703                 return ((boolean[]) obj).length == 0;
 704             } else if (clazz.getComponentType() == double.class) {
 705                 return ((double[]) obj).length == 0;
 706             } else if (clazz.getComponentType() == long.class) {
 707                 return ((long[]) obj).length == 0;
 708             } else {
 709                 return ((Object[]) obj).length == 0;
 710             }
 711         }
 712
 713         return false;
 714     }
 715
 716     public static boolean isBlank(String value) {
 717         return value == null || value.trim().length() == 0;
 718     }
 719 }