Java 8 deprecation Stage 1 (#251)

core/src/main/java/com/devonfw/tools/solicitor/Solicitor.java

@@ -14,6 +14,7 @@
 
 import com.devonfw.tools.solicitor.SolicitorCliProcessor.CommandLineOptions;
 import com.devonfw.tools.solicitor.SolicitorSetup.ReaderSetup;
+import com.devonfw.tools.solicitor.common.DeprecationChecker;
 import com.devonfw.tools.solicitor.common.LogMessages;
 import com.devonfw.tools.solicitor.common.MavenVersionHelper;
 import com.devonfw.tools.solicitor.common.ResourceToFileCopier;
@@ -66,6 +67,9 @@ public class Solicitor {
   @Autowired
   private LifecycleListenerHolder lifecycleListenerHolder;
 
+  @Autowired
+  private DeprecationChecker deprecationChecker;
+
   private boolean tolerateMissingInput = false;
 
   @Value("${solicitor.tolerate-missing-input}")
@@ -111,6 +115,7 @@ private void extractConfig(String targetDir) {
    */
   private void mainProcessing(CommandLineOptions clo) {
 
+    checkJavaVersion();
     ModelRoot modelRoot = this.configFactory.createConfig(clo.configUrl);
     this.lifecycleListenerHolder.modelRootInitialized(modelRoot);
     if (clo.load) {
@@ -136,6 +141,20 @@ private void mainProcessing(CommandLineOptions clo) {
     this.lifecycleListenerHolder.endOfMainProcessing(modelRoot);
   }
 
+  /**
+   * Checks the java version and possibly issue deprecation error or warning.
+   */
+  private void checkJavaVersion() {
+
+    String javaVersion = System.getProperty("java.version");
+    // we just check for the prefix "1." because from Java 9 on the version number does no longer start with "1."
+    if (javaVersion.startsWith("1.")) {
+      this.deprecationChecker.check(true,
+          "Running Solicitor on Java 8 is deprecated. Yours is '" + javaVersion + "'. Switch to Java 11!");
+    }
+
+  }
+
   /**
    * Read the inventory of {@link ApplicationComponent}s and their declared licenses.
    */

core/src/main/java/com/devonfw/tools/solicitor/common/LogMessages.java

@@ -60,7 +60,7 @@ public enum LogMessages {
   DEPRECATIONS_ACTIVE(42,
       "Deprecated features are available ({}). Please check if this is necessary. Look for message code '{}' to check for actually used deprecated features."), //
   UNAVAILABLE_DEPRECATED_FEATURE(43,
-      "This featue is deprecated and no longer available. Details: {}. For backward compatibility you might temporary activate it by setting '{}'."), //
+      "This feature is deprecated and no longer available. Details: {}. For backward compatibility you might temporary activate it by setting '{}'."), //
   USING_DEPRECATED_FEATURE_FORCED(44,
       "You are using a deprecated feature which is only available because you set {}. You should ASAP migrate your project as this might be unavailable in future versions. Details: {}."), //
   MISSING_INVENTORY_INPUT_FILE(45,

documentation/master-solicitor.asciidoc

@@ -228,7 +228,7 @@ A "normalized" license id might be either a SPDX-Id, a `LicenseRef`-Id or a "pse
 
 == Usage
 === Executing Solicitor
-_Solicitor_ is a standalone Java (Spring Boot) application. Prerequisite for running it is an existing Java 8 or 11 runtime environment. If you do not yet have a the _Solicitor_ executable JAR (`solicitor.jar`) you need to build it as given on the project GitHub homepage https://github.com/devonfw/solicitor .
+_Solicitor_ is a standalone Java (Spring Boot) application. Prerequisite for running it is an existing Java 11 runtime environment. If you do not yet have a the _Solicitor_ executable JAR (`solicitor.jar`) you need to build it as given on the project GitHub homepage https://github.com/devonfw/solicitor .
 
 _Solicitor_ is executed with the following command:
 
@@ -1371,6 +1371,7 @@ The following features are deprecated via the above mechanism:
 * "REGEX:" prefix notation in rule templates (use "(REGEX)" suffix instead); Stage 1 from Version 1.3.0 on; see https://github.com/devonfw/solicitor/issues/78
 * Use of `LicenseAssignmentProject.xls` decision table (use `LicenseAssignmentV2Project.xls` instead); Stage 1 from Version 1.4.0 on
 * Use of `repoType` in the configuration of readers, see <<Applications>>; Stage 1 from Version 1.14.0 on; see https://github.com/devonfw/solicitor/issues/190
+* Running Solicitor on Java 8; Stage 1 from Version 1.22.0 on; see https://github.com/devonfw/solicitor/issues/247
 
 == Experimental Scancode Integration
 
@@ -1701,6 +1702,7 @@ Spring beans implementing this interface will be called at certain points in the
 Changes in 1.22.0::
 * https://github.com/devonfw/solicitor/pull/243: Make sure the MavenReader is protected against XXE threats.
 * https://github.com/devonfw/solicitor/pull/244: Updated Drools rule engine to 8.44.0.Final.
+* https://github.com/devonfw/solicitor/issues/247: Running Solicitor on Java 8 is deprecated (Stage 1) and will be no longer possible soon. Move to Java 11 ASAP!
 
 Changes in 1.21.0::
 * https://github.com/devonfw/solicitor/pull/239: Improving some internal components to reduce risk of path traversal attacks in case that these components are (re)used in some webservice implementation.