Revert and change folders for metadata items, #4712

core/src/main/java/org/apache/hop/metadata/api/HopMetadata.java

@@ -51,12 +51,4 @@
    * @return the type of metadata this property represents.
    */
   HopMetadataPropertyType hopMetadataPropertyType() default HopMetadataPropertyType.NONE;
-
-  /**
-   * A boolean flag, represented as a string, which tells whether the given HopMetadata
-   * implementation has to be shown into a tree of folders
-   *
-   * @return a boolean as string flag that will enable the UI to allow folders creation
-   */
-  String subfoldersEnabled() default "false";
 }

core/src/main/java/org/apache/hop/metadata/api/HopMetadataBase.java

@@ -22,11 +22,12 @@
 
 public class HopMetadataBase implements IHopMetadata {
 
-  @HopMetadataProperty protected String path;
-
   /** All metadata objects have a name to uniquely identify it. */
   @HopMetadataProperty protected String name;
 
+  /** All metadata objects can have a virtual path to organize them */
+  @HopMetadataProperty protected String virtualPath;
+
   /**
    * The metadata provider name is optionally used at runtime to figure out where the metadata came
    * from. Optionally used by plugins. It's volatile because it's never persisted.
@@ -38,13 +39,13 @@ public HopMetadataBase() {}
   public HopMetadataBase(String name) {
     this();
     this.name = name;
-    this.path = "";
+    this.virtualPath = "";
   }
 
-  public HopMetadataBase(String name, String path) {
+  public HopMetadataBase(String name, String virtualPath) {
     this();
     this.name = name;
-    this.path = path;
+    this.virtualPath = virtualPath;
   }
 
   @Override
@@ -106,26 +107,40 @@ public void setMetadataProviderName(String metadataProviderName) {
     this.metadataProviderName = metadataProviderName;
   }
 
+  /**
+   * Get the virtual path set on a metadata item
+   *
+   * @return a String representing the virtual path
+   */
   @Override
-  public String getPath() {
-    return path;
+  public String getVirtualPath() {
+    return virtualPath;
   }
 
+  /**
+   * Set the virtual path on a metadata item
+   *
+   * @param virtualPath the virtual path to set to the metadata item
+   */
   @Override
-  public void setPath(String path) {
-    this.path = path;
+  public void setVirtualPath(String virtualPath) {
+    this.virtualPath = virtualPath;
   }
 
+  /**
+   * Return the virtual path and name of the object
+   *
+   * @return the virtual path and name of the object
+   */
   @Override
   public String getFullName() {
-    if (path == null || path.isBlank()) {
+    if (virtualPath == null || virtualPath.isEmpty()) {
       return name;
+    }
+    if (virtualPath.endsWith("/")) {
+      return virtualPath + name;
     } else {
-      if (path.endsWith("/")) {
-        return path + name;
-      } else {
-        return path + "/" + name;
-      }
+      return virtualPath + "/" + name;
     }
   }
 }

core/src/main/java/org/apache/hop/metadata/api/IHopMetadata.java

@@ -53,9 +53,22 @@ public interface IHopMetadata {
    */
   void setMetadataProviderName(String metadataProviderName);
 
-  String getPath();
+  /**
+   * @return the virtual path for organizing metadata items
+   */
+  String getVirtualPath();
 
-  void setPath(String path);
+  /**
+   * Set the virtual path on a metadata item
+   *
+   * @param virtualPath the virtual path to set to the metadata item
+   */
+  void setVirtualPath(String virtualPath);
 
+  /**
+   * Get the complete name of the object (virtual path + name)
+   *
+   * @return the full name of the object
+   */
   String getFullName();
 }

core/src/main/java/org/apache/hop/metadata/api/IHopMetadataSerializer.java

@@ -19,7 +19,6 @@
 
 import java.util.List;
 import org.apache.hop.core.exception.HopException;
-import org.apache.hop.metadata.serializer.FileSystemNode;
 
 /**
  * This metadata interface describes how an object T can be serialized and analyzed.
@@ -68,11 +67,6 @@ public interface IHopMetadataSerializer<T extends IHopMetadata> {
    */
   List<String> listObjectNames() throws HopException;
 
-  default FileSystemNode getFileSystemTree() throws HopException {
-    throw new UnsupportedOperationException(
-        "listObjectNames(String folderName, Boolean recursive) is not supported by this metadata serializer");
-  }
-
   /**
    * See if an object with the given name exists.
    *