X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;ds=sidebyside;f=org.argeo.util%2Fsrc%2Forg%2Fargeo%2Futil%2FLangUtils.java;h=16229453776e04ed968457183aa225fd578d6c0a;hb=9f729eeb8255a9d800ad2506735dda8cc215a135;hp=2f99bb3e0d735bb75a99704ce9ffbee2847b560c;hpb=d289fa62f9dadd0a5bd49ab5e3d499e87152525d;p=lgpl%2Fargeo-commons.git diff --git a/org.argeo.util/src/org/argeo/util/LangUtils.java b/org.argeo.util/src/org/argeo/util/LangUtils.java index 2f99bb3e0..162294537 100644 --- a/org.argeo.util/src/org/argeo/util/LangUtils.java +++ b/org.argeo.util/src/org/argeo/util/LangUtils.java @@ -10,16 +10,19 @@ 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 @@ -35,6 +38,21 @@ public class LangUtils { 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 map(String key, Object value) { + assert key != null; + HashMap props = new HashMap<>(); + if (value != null) + props.put(key, value); + return props; + } + /* * DICTIONARY */ @@ -185,6 +203,35 @@ public class LangUtils { 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 null. + */ + public static List toStringList(Object value) { + List 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 */