+++ /dev/null
-package org.argeo.util;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.Writer;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.StandardOpenOption;
-import java.time.ZonedDateTime;
-import java.time.temporal.ChronoUnit;
-import java.time.temporal.Temporal;
-import java.util.ArrayList;
-import java.util.Dictionary;
-import java.util.Enumeration;
-import java.util.HashMap;
-import java.util.Hashtable;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-
-import javax.naming.InvalidNameException;
-import javax.naming.ldap.LdapName;
-
-/** Utilities around Java basic features. */
-public class LangUtils {
- /*
- * NON-API OSGi
- */
- /**
- * Returns an array with the names of the provided classes. Useful when
- * registering services with multiple interfaces in OSGi.
- */
- public static String[] names(Class<?>... clzz) {
- String[] res = new String[clzz.length];
- for (int i = 0; i < clzz.length; i++)
- res[i] = clzz[i].getName();
- return res;
- }
-
- /*
- * MAP
- */
- /**
- * Creates a new {@link Dictionary} with one key-value pair. Key should not be
- * null, but if the value is null, it returns an empty {@link Dictionary}.
- */
- public static Map<String, Object> map(String key, Object value) {
- assert key != null;
- HashMap<String, Object> props = new HashMap<>();
- if (value != null)
- props.put(key, value);
- return props;
- }
-
- /*
- * DICTIONARY
- */
-
- /**
- * Creates a new {@link Dictionary} with one key-value pair. Key should not be
- * null, but if the value is null, it returns an empty {@link Dictionary}.
- */
- public static Dictionary<String, Object> dict(String key, Object value) {
- assert key != null;
- Hashtable<String, Object> props = new Hashtable<>();
- if (value != null)
- props.put(key, value);
- return props;
- }
-
- /** @deprecated Use {@link #dict(String, Object)} instead. */
- @Deprecated
- public static Dictionary<String, Object> dico(String key, Object value) {
- return dict(key, value);
- }
-
- /** Converts a {@link Dictionary} to a {@link Map} of strings. */
- public static Map<String, String> dictToStringMap(Dictionary<String, ?> properties) {
- if (properties == null) {
- return null;
- }
- Map<String, String> res = new HashMap<>(properties.size());
- Enumeration<String> keys = properties.keys();
- while (keys.hasMoreElements()) {
- String key = keys.nextElement();
- res.put(key, properties.get(key).toString());
- }
- return res;
- }
-
- /**
- * Get a string property from this map, expecting to find it, or
- * <code>null</code> if not found.
- */
- public static String get(Map<String, ?> map, String key) {
- Object res = map.get(key);
- if (res == null)
- return null;
- return res.toString();
- }
-
- /**
- * Get a string property from this map, expecting to find it.
- *
- * @throws IllegalArgumentException if the key was not found
- */
- public static String getNotNull(Map<String, ?> map, String key) {
- Object res = map.get(key);
- if (res == null)
- throw new IllegalArgumentException("Map " + map + " should contain key " + key);
- return res.toString();
- }
-
- /**
- * Wraps the keys of the provided {@link Dictionary} as an {@link Iterable}.
- */
- public static Iterable<String> keys(Dictionary<String, ?> props) {
- assert props != null;
- return new DictionaryKeys(props);
- }
-
- static String toJson(Dictionary<String, ?> props) {
- return toJson(props, false);
- }
-
- static String toJson(Dictionary<String, ?> props, boolean pretty) {
- StringBuilder sb = new StringBuilder();
- sb.append('{');
- if (pretty)
- sb.append('\n');
- Enumeration<String> keys = props.keys();
- while (keys.hasMoreElements()) {
- String key = keys.nextElement();
- if (pretty)
- sb.append(' ');
- sb.append('\"').append(key).append('\"');
- if (pretty)
- sb.append(" : ");
- else
- sb.append(':');
- sb.append('\"').append(props.get(key)).append('\"');
- if (keys.hasMoreElements())
- sb.append(", ");
- if (pretty)
- sb.append('\n');
- }
- sb.append('}');
- return sb.toString();
- }
-
- static void storeAsProperties(Dictionary<String, Object> props, Path path) throws IOException {
- if (props == null)
- throw new IllegalArgumentException("Props cannot be null");
- Properties toStore = new Properties();
- for (Enumeration<String> keys = props.keys(); keys.hasMoreElements();) {
- String key = keys.nextElement();
- toStore.setProperty(key, props.get(key).toString());
- }
- try (OutputStream out = Files.newOutputStream(path)) {
- toStore.store(out, null);
- }
- }
-
- static void appendAsLdif(String dnBase, String dnKey, Dictionary<String, Object> props, Path path)
- throws IOException {
- if (props == null)
- throw new IllegalArgumentException("Props cannot be null");
- Object dnValue = props.get(dnKey);
- String dnStr = dnKey + '=' + dnValue + ',' + dnBase;
- LdapName dn;
- try {
- dn = new LdapName(dnStr);
- } catch (InvalidNameException e) {
- throw new IllegalArgumentException("Cannot interpret DN " + dnStr, e);
- }
- if (dnValue == null)
- throw new IllegalArgumentException("DN key " + dnKey + " must have a value");
- try (Writer writer = Files.newBufferedWriter(path, StandardOpenOption.APPEND, StandardOpenOption.CREATE)) {
- writer.append("\ndn: ");
- writer.append(dn.toString());
- writer.append('\n');
- for (Enumeration<String> keys = props.keys(); keys.hasMoreElements();) {
- String key = keys.nextElement();
- Object value = props.get(key);
- writer.append(key);
- writer.append(": ");
- // FIXME deal with binary and multiple values
- writer.append(value.toString());
- writer.append('\n');
- }
- }
- }
-
- static Dictionary<String, Object> loadFromProperties(Path path) throws IOException {
- Properties toLoad = new Properties();
- try (InputStream in = Files.newInputStream(path)) {
- toLoad.load(in);
- }
- Dictionary<String, Object> res = new Hashtable<String, Object>();
- for (Object key : toLoad.keySet())
- res.put(key.toString(), toLoad.get(key));
- return res;
- }
-
- /*
- * COLLECTIONS
- */
- /**
- * Convert a comma-separated separated {@link String} or a {@link String} array
- * to a {@link List} of {@link String}, trimming them. Useful to quickly
- * interpret OSGi services properties.
- *
- * @return a {@link List} containing the trimmed {@link String}s, or an empty
- * {@link List} if the argument was <code>null</code>.
- */
- public static List<String> toStringList(Object value) {
- List<String> values = new ArrayList<>();
- if (value == null)
- return values;
- String[] arr;
- if (value instanceof String) {
- arr = ((String) value).split(",");
- } else if (value instanceof String[]) {
- arr = (String[]) value;
- } else {
- throw new IllegalArgumentException("Unsupported value type " + value.getClass());
- }
- for (String str : arr) {
- values.add(str.trim());
- }
- return values;
- }
-
- /*
- * EXCEPTIONS
- */
- /**
- * Chain the messages of all causes (one per line, <b>starts with a line
- * return</b>) without all the stack
- */
- public static String chainCausesMessages(Throwable t) {
- StringBuffer buf = new StringBuffer();
- chainCauseMessage(buf, t);
- return buf.toString();
- }
-
- /** Recursive chaining of messages */
- private static void chainCauseMessage(StringBuffer buf, Throwable t) {
- buf.append('\n').append(' ').append(t.getClass().getCanonicalName()).append(": ").append(t.getMessage());
- if (t.getCause() != null)
- chainCauseMessage(buf, t.getCause());
- }
-
- /*
- * TIME
- */
- /** Formats time elapsed since start. */
- public static String since(ZonedDateTime start) {
- ZonedDateTime now = ZonedDateTime.now();
- return duration(start, now);
- }
-
- /** Formats a duration. */
- public static String duration(Temporal start, Temporal end) {
- long count = ChronoUnit.DAYS.between(start, end);
- if (count != 0)
- return count > 1 ? count + " days" : count + " day";
- count = ChronoUnit.HOURS.between(start, end);
- if (count != 0)
- return count > 1 ? count + " hours" : count + " hours";
- count = ChronoUnit.MINUTES.between(start, end);
- if (count != 0)
- return count > 1 ? count + " minutes" : count + " minute";
- count = ChronoUnit.SECONDS.between(start, end);
- return count > 1 ? count + " seconds" : count + " second";
- }
-
- /** Singleton constructor. */
- private LangUtils() {
-
- }
-
-}
projects / lgpl / argeo-commons.git / blobdiff