2 * Copyright © 2016-2018 European Support Limited
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package org.onap.config;
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;
24 import com.virtlink.commons.configuration2.jackson.JsonConfiguration;
26 import java.lang.reflect.Field;
27 import java.lang.reflect.ParameterizedType;
28 import java.lang.reflect.Type;
29 import java.net.MalformedURLException;
31 import java.nio.file.Files;
32 import java.nio.file.Path;
33 import java.util.ArrayDeque;
34 import java.util.ArrayList;
35 import java.util.Arrays;
36 import java.util.Collection;
37 import java.util.Collections;
38 import java.util.Deque;
39 import java.util.HashMap;
40 import java.util.HashSet;
41 import java.util.Iterator;
42 import java.util.LinkedHashMap;
43 import java.util.List;
45 import java.util.Optional;
46 import java.util.Queue;
48 import java.util.SortedSet;
49 import java.util.TreeSet;
50 import java.util.concurrent.BlockingQueue;
51 import java.util.concurrent.ConcurrentLinkedQueue;
52 import java.util.concurrent.LinkedBlockingQueue;
53 import java.util.concurrent.LinkedTransferQueue;
54 import java.util.concurrent.TransferQueue;
55 import java.util.regex.Matcher;
56 import java.util.regex.Pattern;
57 import java.util.stream.Collectors;
58 import java.util.stream.Stream;
59 import net.sf.corn.cps.CPScanner;
60 import net.sf.corn.cps.ResourceFilter;
61 import org.apache.commons.configuration2.CompositeConfiguration;
62 import org.apache.commons.configuration2.Configuration;
63 import org.apache.commons.configuration2.FileBasedConfiguration;
64 import org.apache.commons.configuration2.PropertiesConfiguration;
65 import org.apache.commons.configuration2.XMLConfiguration;
66 import org.apache.commons.configuration2.builder.BasicConfigurationBuilder;
67 import org.apache.commons.configuration2.builder.ReloadingFileBasedConfigurationBuilder;
68 import org.apache.commons.configuration2.builder.fluent.Configurations;
69 import org.apache.commons.configuration2.builder.fluent.Parameters;
70 import org.apache.commons.configuration2.convert.DefaultListDelimiterHandler;
71 import org.apache.commons.configuration2.ex.ConfigurationException;
72 import org.apache.commons.io.IOUtils;
73 import org.onap.config.api.Config;
74 import org.onap.config.api.ConfigurationManager;
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;
82 public class ConfigurationUtils {
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;
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);
102 private ConfigurationUtils() {
103 // prevent instantiation
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);
116 collection.addAll(getAllFiles(innerFile, recursive, onlyDirectory));
124 public static String getCommaSeparatedList(String[] list) {
125 return getCommaSeparatedList(list == null ? Collections.emptyList() : Arrays.asList(list));
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(","));
133 public static boolean isConfig(URL url) {
134 return isConfig(url.getFile());
137 public static boolean isConfig(String file) {
138 file = file.toUpperCase().substring(file.lastIndexOf('!') + 1);
139 file = file.substring(file.lastIndexOf('/') + 1);
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() + ")$") || file.matches(
145 "CONFIG(.)*\\.(" + ConfigurationType.PROPERTIES.name() + "|" + ConfigurationType.XML.name() + "|"
146 + ConfigurationType.JSON.name() + "|" + ConfigurationType.YAML.name() + ")$");
149 public static boolean isConfig(File file) {
150 return file != null && file.exists() && isConfig(file.getName());
153 private static Optional<String> getNamespace(Configuration config) {
154 return ofNullable(config).flatMap(configuration -> ofNullable(configuration.getString(Constants.NAMESPACE_KEY)))
155 .map(String::toUpperCase);
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()));
165 public static Optional<FileBasedConfiguration> getConfiguration(URL url) {
169 ConfigurationType configType = ConfigurationUtils.getConfigType(url);
170 switch (configType) {
172 return Optional.of(new Configurations().fileBased(PropertiesConfiguration.class, url));
174 return Optional.of(new Configurations().fileBased(XMLConfiguration.class, url));
176 return Optional.of(new Configurations().fileBased(JsonConfiguration.class, url));
178 return Optional.of(new Configurations().fileBased(YamlConfiguration.class, url));
180 throw new ConfigurationException(CONFIGURATION_TYPE_NOT_SUPPORTED + configType);
182 } catch (ConfigurationException exception) {
183 exception.printStackTrace();
186 return Optional.empty();
189 public static Optional<FileBasedConfiguration> getConfiguration(File file) {
192 return getConfiguration(file.getAbsoluteFile().toURI().toURL());
193 } catch (MalformedURLException e) {
194 throw new IllegalStateException("Malformed URL: " + file.getAbsolutePath());
198 public static ConfigurationMode getMergeStrategy(String file) {
199 file = file.toUpperCase().substring(file.lastIndexOf('!') + 1);
200 file = file.substring(file.lastIndexOf('/') + 1);
201 Pattern pattern = Pattern.compile(
202 "CONFIG(-\\w*){0,1}(-" + "(" + ConfigurationMode.OVERRIDE + "|" + ConfigurationMode.MERGE + "|"
203 + ConfigurationMode.UNION + ")){0,1}" + "\\.(" + ConfigurationType.PROPERTIES.name() + "|"
204 + ConfigurationType.XML.name() + "|" + ConfigurationType.JSON.name() + "|"
205 + ConfigurationType.YAML.name() + ")$");
206 Matcher matcher = pattern.matcher(file);
207 boolean b1 = matcher.matches();
209 for (int i = 1; i <= matcher.groupCount(); i++) {
210 String modeName = matcher.group(i);
211 if (modeName != null) {
212 modeName = modeName.substring(1);
215 return Enum.valueOf(ConfigurationMode.class, modeName);
216 } catch (Exception exception) {
225 public static ConfigurationType getConfigType(URL url) {
226 return Enum.valueOf(ConfigurationType.class,
227 url.getFile().substring(url.getFile().lastIndexOf('.') + 1).toUpperCase());
230 private static Optional<ConfigurationMode> convertConfigurationMode(String configMode) {
231 ConfigurationMode configurationMode = null;
233 configurationMode = ConfigurationMode.valueOf(configMode);
234 } catch (Exception exception) {
235 LOGGER.error("Could not find convert {} into configuration mode", configMode);
237 return Optional.ofNullable(configurationMode);
240 private static Optional<String> getMergeStrategy(Configuration config) {
241 return ofNullable(config).flatMap(configuration -> ofNullable(configuration.getString(Constants.MODE_KEY)))
242 .map(String::toUpperCase);
245 public static ConfigurationMode getMergeStrategy(File file) {
246 Optional<ConfigurationMode> configurationMode =
247 getConfiguration(file).flatMap(ConfigurationUtils::getMergeStrategy)
248 .flatMap(ConfigurationUtils::convertConfigurationMode);
249 return configurationMode.orElseGet(() -> getMergeStrategy(file.getName().toUpperCase()));
252 public static ConfigurationType getConfigType(File file) {
253 return Enum.valueOf(ConfigurationType.class,
254 file.getAbsolutePath().substring(file.getAbsolutePath().lastIndexOf('.') + 1).toUpperCase());
257 public static Class getCollectionGenericType(Field field) {
258 Type type = field.getGenericType();
260 if (type instanceof ParameterizedType) {
262 ParameterizedType paramType = (ParameterizedType) type;
263 Type[] arr = paramType.getActualTypeArguments();
264 if (arr.length > 0) {
265 Class<?> clazz = (Class<?>) arr[0];
266 if (isWrapperClass(clazz)) {
269 throw new RuntimeException("Collection of type " + clazz.getName() + " not supported.");
274 return String[].class;
277 public static boolean isWrapperClass(Class clazz) {
278 return clazz == String.class || clazz == Boolean.class || clazz == Character.class || Number.class
283 public static Class getArrayClass(Class clazz) {
284 return ARRAY_CLASS_MAP.getOrDefault(clazz, null);
287 public static List<URL> getAllClassPathResources() {
288 return CPScanner.scanResources(new ResourceFilter());
291 public static BasicConfigurationBuilder<FileBasedConfiguration> getConfigurationBuilder(URL url) {
292 ConfigurationType configType = ConfigurationUtils.getConfigType(url);
293 ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> builder =
294 getFileBasedConfigurationReloadingFileBasedConfigurationBuilder(configType);
296 new Parameters().fileBased().setURL(url).setListDelimiterHandler(new DefaultListDelimiterHandler(',')));
300 private static ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> getFileBasedConfigurationReloadingFileBasedConfigurationBuilder(
301 ConfigurationType configType) {
303 ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> builder;
304 switch (configType) {
306 builder = new ReloadingFileBasedConfigurationBuilder<>(PropertiesConfiguration.class);
309 builder = new ReloadingFileBasedConfigurationBuilder<>(XMLConfiguration.class);
312 builder = new ReloadingFileBasedConfigurationBuilder<>(JsonConfiguration.class);
315 builder = new ReloadingFileBasedConfigurationBuilder<>(YamlConfiguration.class);
318 throw new IllegalArgumentException(CONFIGURATION_TYPE_NOT_SUPPORTED + configType);
323 public static BasicConfigurationBuilder<FileBasedConfiguration> getConfigurationBuilder(File file,
325 ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration> builder;
326 ConfigurationType configType = ConfigurationUtils.getConfigType(file);
327 builder = getFileBasedConfigurationReloadingFileBasedConfigurationBuilder(configType);
328 builder.configure(new Parameters().fileBased().setFile(file)
329 .setListDelimiterHandler(new DefaultListDelimiterHandler(',')));
330 builder.setAutoSave(autoSave);
334 public static <T> T read(Configuration config, Class<T> clazz, String keyPrefix) throws Exception {
335 Config confAnnotation = clazz.getAnnotation(Config.class);
336 if (confAnnotation != null) {
337 keyPrefix += (confAnnotation.key() + ".");
339 T objToReturn = clazz.newInstance();
340 for (Field field : clazz.getDeclaredFields()) {
341 Config fieldAnnotation = field.getAnnotation(Config.class);
342 if (fieldAnnotation != null) {
343 field.setAccessible(true);
344 field.set(objToReturn, config.getProperty(keyPrefix + fieldAnnotation.key()));
345 } else if (field.getType().getAnnotation(Config.class) != null) {
346 field.set(objToReturn, read(config, field.getType(), keyPrefix));
352 public static Object getPrimitiveArray(Collection collection, Class clazz) {
353 if (clazz == int.class) {
354 int[] array = new int[collection.size()];
355 Object[] objArray = collection.toArray();
356 for (int i = 0; i < collection.size(); i++) {
357 array[i] = (int) objArray[i];
361 if (clazz == byte.class) {
362 byte[] array = new byte[collection.size()];
363 Object[] objArray = collection.toArray();
364 for (int i = 0; i < collection.size(); i++) {
365 array[i] = (byte) objArray[i];
369 if (clazz == short.class) {
370 short[] array = new short[collection.size()];
371 Object[] objArray = collection.toArray();
372 for (int i = 0; i < collection.size(); i++) {
373 array[i] = (short) objArray[i];
377 if (clazz == long.class) {
378 long[] array = new long[collection.size()];
379 Object[] objArray = collection.toArray();
380 for (int i = 0; i < collection.size(); i++) {
381 array[i] = (long) objArray[i];
385 if (clazz == float.class) {
386 float[] array = new float[collection.size()];
387 Object[] objArray = collection.toArray();
388 for (int i = 0; i < collection.size(); i++) {
389 array[i] = (float) objArray[i];
393 if (clazz == double.class) {
394 double[] array = new double[collection.size()];
395 Object[] objArray = collection.toArray();
396 for (int i = 0; i < collection.size(); i++) {
397 array[i] = (double) objArray[i];
401 if (clazz == boolean.class) {
402 boolean[] array = new boolean[collection.size()];
403 Object[] objArray = collection.toArray();
404 for (int i = 0; i < collection.size(); i++) {
405 array[i] = (boolean) objArray[i];
412 public static String getCollectionString(String input) {
413 Pattern pattern = Pattern.compile("^\\[(.*)\\]$");
414 Matcher matcher = pattern.matcher(input);
415 if (matcher.matches()) {
416 input = matcher.group(1);
421 public static String processVariablesIfPresent(String tenant, String namespace, String data) {
422 Pattern pattern = Pattern.compile("^.*\\$\\{(.*)\\}.*");
423 Matcher matcher = pattern.matcher(data);
424 if (matcher.matches()) {
425 String key = matcher.group(1);
426 if (key.toUpperCase().startsWith("ENV:")) {
427 String envValue = System.getenv(key.substring(4));
428 return processVariablesIfPresent(tenant, namespace, data.replaceAll("\\$\\{" + key + "\\}",
429 envValue == null ? "" : envValue.replace("\\", "\\\\")));
430 } else if (key.toUpperCase().startsWith("SYS:")) {
431 String sysValue = System.getProperty(key.substring(4));
432 return processVariablesIfPresent(tenant, namespace, data.replaceAll("\\$\\{" + key + "\\}",
433 sysValue == null ? "" : sysValue.replace("\\", "\\\\")));
435 String propertyValue = ConfigurationUtils.getCollectionString(
436 ConfigurationManager.lookup().getAsStringValues(tenant, namespace, key).toString());
437 return processVariablesIfPresent(tenant, namespace, data.replaceAll("\\$\\{" + key + "\\}",
438 propertyValue == null ? "" : propertyValue.replace("\\", "\\\\")));
445 public static String getFileContents(String path) {
448 return IOUtils.toString(new URL(path));
450 } catch (Exception exception) {
451 exception.printStackTrace();
456 public static String getFileContents(Path path) {
459 return new String(Files.readAllBytes(path));
461 } catch (Exception exception) {
462 exception.printStackTrace();
467 public static Object getDefaultFor(Class clazz) {
468 if (byte.class == clazz) {
469 return new Byte("0");
470 } else if (short.class == clazz) {
471 return new Short("0");
472 } else if (int.class == clazz) {
473 return new Integer("0");
474 } else if (float.class == clazz) {
475 return new Float("0");
476 } else if (long.class == clazz) {
477 return new Long("0");
478 } else if (double.class == clazz) {
479 return new Double("0");
480 } else if (boolean.class == clazz) {
481 return Boolean.FALSE;
486 public static Collection getCompatibleCollectionForAbstractDef(Class clazz) {
487 if (BlockingQueue.class.isAssignableFrom(clazz)) {
488 return getConcreteCollection(BlockingQueue.class);
490 if (TransferQueue.class.isAssignableFrom(clazz)) {
491 return getConcreteCollection(TransferQueue.class);
493 if (Deque.class.isAssignableFrom(clazz)) {
494 return getConcreteCollection(Deque.class);
496 if (Queue.class.isAssignableFrom(clazz)) {
497 return getConcreteCollection(Queue.class);
499 if (SortedSet.class.isAssignableFrom(clazz)) {
500 return getConcreteCollection(SortedSet.class);
502 if (Set.class.isAssignableFrom(clazz)) {
503 return getConcreteCollection(Set.class);
505 if (List.class.isAssignableFrom(clazz)) {
506 return getConcreteCollection(List.class);
511 public static Collection getConcreteCollection(Class clazz) {
512 switch (clazz.getName()) {
513 case "java.util.Collection":
514 case "java.util.List":
515 return new ArrayList<>();
516 case "java.util.Set":
517 return new HashSet<>();
518 case "java.util.SortedSet":
519 return new TreeSet<>();
520 case "java.util.Queue":
521 return new ConcurrentLinkedQueue<>();
522 case "java.util.Deque":
523 return new ArrayDeque<>();
524 case "java.util.concurrent.TransferQueue":
525 return new LinkedTransferQueue<>();
526 case "java.util.concurrent.BlockingQueue":
527 return new LinkedBlockingQueue<>();
533 public static String getConfigurationRepositoryKey(File file) {
534 return getConfigurationRepositoryKey(
535 ConfigurationUtils.getNamespace(file).split(Constants.TENANT_NAMESPACE_SEPARATOR));
538 public static String getConfigurationRepositoryKey(String[] array) {
539 Deque<String> stack = new ArrayDeque<>();
540 stack.push(Constants.DEFAULT_TENANT);
541 for (String element : array) {
544 String toReturn = stack.pop();
545 return stack.pop() + Constants.KEY_ELEMENTS_DELIMITER + toReturn;
548 public static String getNamespace(File file) {
549 Optional<String> namespace =
550 getConfiguration(file).flatMap(ConfigurationUtils::getNamespace).map(String::toUpperCase);
551 return namespace.orElseGet(() -> getNamespace(file.getName().toUpperCase()));
554 public static String getNamespace(String file) {
555 file = file.toUpperCase().substring(file.lastIndexOf('!') + 1);
556 file = file.substring(file.lastIndexOf('/') + 1);
557 Pattern pattern = Pattern.compile(
558 "CONFIG(-\\w*){0,1}(-" + "(" + ConfigurationMode.OVERRIDE + "|" + ConfigurationMode.MERGE + "|"
559 + ConfigurationMode.UNION + ")){0,1}" + "\\.(" + ConfigurationType.PROPERTIES.name() + "|"
560 + ConfigurationType.XML.name() + "|" + ConfigurationType.JSON.name() + "|"
561 + ConfigurationType.YAML.name() + ")$");
562 Matcher matcher = pattern.matcher(file);
563 boolean b1 = matcher.matches();
565 if (matcher.group(1) != null) {
566 String moduleName = matcher.group(1).substring(1);
567 return moduleName.equalsIgnoreCase(ConfigurationMode.OVERRIDE.name()) || moduleName.equalsIgnoreCase(
568 ConfigurationMode.UNION.name()) || moduleName.equalsIgnoreCase(ConfigurationMode.MERGE.name())
569 ? Constants.DEFAULT_NAMESPACE : moduleName;
571 return Constants.DEFAULT_NAMESPACE;
573 } else if (isConfig(file)) {
574 return Constants.DEFAULT_NAMESPACE;
580 public static String getConfigurationRepositoryKey(URL url) {
581 return getConfigurationRepositoryKey(
582 ConfigurationUtils.getNamespace(url).split(Constants.TENANT_NAMESPACE_SEPARATOR));
585 public static String getNamespace(URL url) {
587 Optional<String> namespace =
588 getConfiguration(url).flatMap(ConfigurationUtils::getNamespace).map(String::toUpperCase);
590 return namespace.orElseGet(() -> getNamespace(url.getFile().toUpperCase()));
593 public static LinkedHashMap toMap(Configuration config) {
594 Iterator<String> iterator = config.getKeys();
595 LinkedHashMap<String, String> map = new LinkedHashMap<>();
596 while (iterator.hasNext()) {
597 String key = iterator.next();
598 if (!(key.equals(Constants.MODE_KEY) || key.equals(Constants.NAMESPACE_KEY) || key.equals(
599 Constants.LOAD_ORDER_KEY))) {
600 map.put(key, config.getProperty(key).toString());
607 public static Map diff(LinkedHashMap orig, LinkedHashMap latest) {
608 orig = new LinkedHashMap<>(orig);
609 latest = new LinkedHashMap<>(latest);
610 List<String> set = new ArrayList(orig.keySet());
611 for (String key : set) {
612 if (latest.remove(key, orig.get(key))) {
616 Set<String> keys = latest.keySet();
617 for (String key : keys) {
620 set = new ArrayList(orig.keySet());
621 for (String key : set) {
624 return new HashMap<>(latest);
627 public static boolean isArray(String tenant, String namespace, String key, int processingHints) throws Exception {
628 Object obj = ConfigurationUtils
629 .getProperty(ConfigurationRepository.lookup().getConfigurationFor(tenant, namespace), key,
631 return (obj != null) && ConfigurationUtils.isCollection(obj.toString());
634 public static Object getProperty(Configuration config, String key, int processingHints) {
636 if (!isDirectLookup(processingHints)) {
638 if (config instanceof CompositeConfiguration) {
640 CompositeConfiguration conf = (CompositeConfiguration) config;
641 for (int i = 0; i < conf.getNumberOfConfigurations(); i++) {
643 if (isNodeSpecific(processingHints)) {
644 Object obj = conf.getConfiguration(i).getProperty(key);
652 return config.getProperty(key);
655 public static boolean isCollection(String input) {
656 Pattern pattern = Pattern.compile("^\\[(.*)\\]$");
657 Matcher matcher = pattern.matcher(input);
658 return matcher.matches();
661 public static boolean isDirectLookup(int hints) {
662 return (hints & LATEST_LOOKUP.value()) == LATEST_LOOKUP.value();
665 public static boolean isNodeSpecific(int hints) {
666 return (hints & NODE_SPECIFIC.value()) == NODE_SPECIFIC.value();
669 public static boolean isExternalLookup(int hints) {
670 return (hints & EXTERNAL_LOOKUP.value()) == EXTERNAL_LOOKUP.value();
673 public static boolean isZeroLengthArray(Class clazz, Object obj) {
674 if (clazz.isArray() && clazz.getComponentType().isPrimitive()) {
675 if (clazz.getComponentType() == int.class) {
676 return ((int[]) obj).length == 0;
677 } else if (clazz.getComponentType() == byte.class) {
678 return ((byte[]) obj).length == 0;
679 } else if (clazz.getComponentType() == short.class) {
680 return ((short[]) obj).length == 0;
681 } else if (clazz.getComponentType() == float.class) {
682 return ((float[]) obj).length == 0;
683 } else if (clazz.getComponentType() == boolean.class) {
684 return ((boolean[]) obj).length == 0;
685 } else if (clazz.getComponentType() == double.class) {
686 return ((double[]) obj).length == 0;
687 } else if (clazz.getComponentType() == long.class) {
688 return ((long[]) obj).length == 0;
690 return ((Object[]) obj).length == 0;
697 public static boolean isBlank(String value) {
698 return value == null || value.trim().length() == 0;