fix: escape double quotes in HanaDbObject identifier formatting

Author: mkemeter

src/main/java/org/sap/cytoscape/internal/hdb/HanaDbObject.java

@@ -1,5 +1,7 @@
 package org.sap.cytoscape.internal.hdb;
 
+import org.sap.cytoscape.internal.utils.HanaUtils;
+
 /**
  * Describes an object in an SAP HANA database (e.g. table, procedure, graph workspace, ...)
  */
@@ -20,6 +22,6 @@ public HanaDbObject(String schema, String name){
     }
 
     public String toString(){
-        return '"' + this.schema + "\".\"" + this.name+'"';
+        return HanaUtils.quoteIdentifier(this.schema) + "." + HanaUtils.quoteIdentifier(this.name);
     }
 }

src/test/java/OtherHdbTest.java

@@ -107,6 +107,13 @@ public void testHanaDbObjectToString() {
         Assert.assertEquals("\"MY_SCHEMA\".\"MY_TABLE\"", obj.toString());
     }
 
+    @Test
+    public void testHanaDbObjectToString_containsDoubleQuote() {
+        // Embedded double quotes must be escaped as "" per SQL standard identifier quoting.
+        HanaDbObject obj = new HanaDbObject("MY\"SCHEMA", "MY\"TABLE");
+        Assert.assertEquals("\"MY\"\"SCHEMA\".\"MY\"\"TABLE\"", obj.toString());
+    }
+
     // -------------------------------------------------------------------------
     // HanaQueryResult — unmodifiable list + defensive clone
     // -------------------------------------------------------------------------