extended interface: added keys() method

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.configuration.api/build.gradle.kts

@@ -9,7 +9,7 @@ object Meta {
     val COMPONENT_TYPE = "java" // "java" or "versionCatalog"
     val GROUP = "de.srsoftware"
     val ARTIFACT_ID = "configuration.api"
-    val VERSION = "1.0.1"
+    val VERSION = "1.0.2"
     val PUBLISHING_TYPE = "AUTOMATIC" // USER_MANAGED or AUTOMATIC
     val SHA_ALGORITHMS = listOf("SHA-256", "SHA-512") // sha256 and sha512 are supported but not mandatory. Only sha1 is mandatory but it is supported by default.
     val DESC = "SRSoftware Configuration API"

de.srsoftware.configuration.api/src/main/java/de/srsoftware/configuration/Configuration.java

@@ -2,6 +2,7 @@
 package de.srsoftware.configuration;
 
 import java.io.IOException;
+import java.util.Collection;
 import java.util.Optional;
 
 /**
@@ -35,6 +36,12 @@ public interface Configuration {
 	 */
 	<T> T get(String key, T defaultValue);
 
+	/**
+	 * Get the configuration`s key set
+	 * @return a collection of strings which are the keys to the configuration
+	 */
+	Collection<String> keys();
+
 	/**
 	 * Assign a specific key with a new value. If the key was assigned with another value before, the old value is overwritten
 	 * @param key specifies, which value is to be assigned

de.srsoftware.configuration.json/build.gradle.kts

@@ -14,7 +14,7 @@ object Meta {
     val COMPONENT_TYPE = "java" // "java" or "versionCatalog"
     val GROUP = "de.srsoftware"
     val ARTIFACT_ID = "configuration.json"
-    val VERSION = "1.0.2"
+    val VERSION = "1.0.3"
     val PUBLISHING_TYPE = "AUTOMATIC" // USER_MANAGED or AUTOMATIC
     val SHA_ALGORITHMS = listOf("SHA-256", "SHA-512") // sha256 and sha512 are supported but not mandatory. Only sha1 is mandatory but it is supported by default.
     val DESC = "SRSoftware Configuration: Json-based Implementation"

de.srsoftware.configuration.json/src/main/java/de/srsoftware/configuration/JsonConfig.java

@@ -130,6 +130,11 @@ public class JsonConfig implements Configuration {
 		}
 	}
 
+	@Override
+	public Collection<String> keys() {
+		return json.keySet();
+	}
+
 	/**
 	 * updates the storage file with the current json data
 	 * @throws IOException if writing the file does so