DP-Path-Expression-Example-Fix-Java

README.md

@@ -127,15 +127,16 @@ We’ll filter at two levels of the data:
 When traversing with Path Expressions, the server evaluates filters at different depths. Here’s the stack we’re walking for this example:
 
 ```
-inventory (bin)
-  └── product (map entry, keyed by productId)
-        ├── category
-        ├── featured   <-- product-level filter
-        ├── name
-        ├── description
-        └── variants
-              ├── { "2001": {...}, "2002": {...} }   <-- map-backed variants
-              └── [ {sku:3007,...}, {sku:3008,...} ] <-- list-backed variants
+catalog (bin)
+ └── inventory (map entry)
+      └── product (map entry, keyed by productId)
+           ├── category
+           ├── featured   <-- product-level filter
+           ├── name
+           ├── description
+           └── variants
+                ├── { "2001": {...}, "2002": {...} }   <-- map-backed variants
+                └── [ {sku:3007,...}, {sku:3008,...} ] <-- list-backed variants
                         ^ variant-level filter
 ```
 At product level, we filter by the `featured` field inside each product map.
@@ -337,9 +338,11 @@ Exp filterOnKey =
 
 // Operation
 Record record = client.operate(null, key,
-    CdtOperation.selectByPath(binName, Exp.SELECT_MAP_KEY,
+    CdtOperation.selectByPath(binName, Exp.SELECT_MAP_KEY | Exp.SELECT_NO_FAIL,
         CTX.allChildren(),
-        CTX.allChildrenWithFilter(filterOnKey)
+        CTX.allChildrenWithFilter(filterOnKey),
+        CTX.mapKey(Value.get("variants")),
+        CTX.allChildrenWithFilter(filterOnVariantInventory)
     )
 );
 
@@ -359,11 +362,11 @@ Expected Output:
 
 Filters can be chained with `AND` / `OR`.
 
-**Example**: Select variants that are in stock and have price < 50 (across all products).
+**Example**: Select variants that are in stock, have price < 50 (across all products), and are featured.
 
 **Note**: Unlike the previous examples focused on featured products for homepage promotion, this example demonstrates filtering at the variant level only, without a product-level filter. This pattern is useful for different scenarios like finding clearance items, budget options, or inventory that meets specific criteria across your entire catalog.
 
-When you run the demo, look for the output labeled **"ADVANCED EXAMPLE 3: Combining multiple filters (price < 50 AND quantity > 0)"** in your terminal.
+When you run the demo, look for the output labeled **"ADVANCED EXAMPLE 3: Combining multiple filters (price < 50 AND quantity > 0 AND featured = true)"** in your terminal.
 
 ```java
 Exp filterOnCheapInStock = Exp.and(
@@ -381,7 +384,7 @@ Exp filterOnCheapInStock = Exp.and(
 Record record = client.operate(null, key,
     CdtOperation.selectByPath(binName, Exp.SELECT_MATCHING_TREE,
         CTX.allChildren(),                              // Navigate into all products
-        CTX.allChildren(),                              // Navigate deeper into product structure
+        CTX.allChildrenWithFilter(filterOnFeatured),    // Navigate deeper into the featured product structure
         CTX.mapKey(Value.get("variants")),              // Navigate to variants map/list
         CTX.allChildrenWithFilter(filterOnCheapInStock) // Filter variants by price and quantity
     )
@@ -485,7 +488,7 @@ Record noFailResponse = client.operate(null, key,
 
 With `NO_FAIL`, `malformed_product` excluded silently because variants was "no variant".
 
-When you run the demo, look for the output labeled **"ADVANCED EXAMPLE 5: NO_FAIL flag to tolerate malformed data"** in your terminal. You'll first see **"❌ Operation failed as expected (malformed data without NO_FAIL flag)"** showing the operation fails without NO_FAIL, then **"✅ Operation succeeded with NO_FAIL flag:"** showing the successful operation with the flag.
+When you run the demo, look for the output labeled **"ADVANCED EXAMPLE 6: NO_FAIL flag to tolerate malformed data"** in your terminal. You'll first see **"❌ Operation failed as expected (malformed data without NO_FAIL flag)"** showing the operation fails without NO_FAIL, then **"✅ Operation succeeded with NO_FAIL flag:"** showing the successful operation with the flag.
 
 Expected output:
 
@@ -569,4 +572,4 @@ Exposes metadata of the current element (key, value, or index) during traversal.
 
 **Returns**:
 
-An `Exp` object usable inside filter or modifying expressions.
+An `Exp` object usable inside filter or modifying expressions.

src/main/java/com/aerospike/pathexpressions/PathExpressionsDemo.java

@@ -54,7 +54,7 @@ public static void main(String[] args) throws IOException {
     AerospikeClient client = new AerospikeClient(clientPolicy, new Host("localhost", 3000));
     // Truncate the inventory set
     client.truncate(null, "test", "products", null);
-    String binName = "inventory";
+    String binName = "catalog";
     // insert the inventory
     Key key = new Key("test", "products", "catalog");
     client.put(null, key, new Bin(binName, inventory));
@@ -122,9 +122,11 @@ public static void main(String[] args) throws IOException {
     System.out.println("ADVANCED EXAMPLE 2: Alternate return modes with Exp.SELECT_");
     System.out.println("=".repeat(80));
     Record regexList = client.operate(null, key,
-        CdtOperation.selectByPath(binName, Exp.SELECT_MAP_KEY,
+        CdtOperation.selectByPath(binName, Exp.SELECT_MAP_KEY | Exp.SELECT_NO_FAIL,
             CTX.allChildren(),
-            CTX.allChildrenWithFilter(filterOnKey)));
+            CTX.allChildrenWithFilter(filterOnFeatured),
+            CTX.mapKey(Value.get("variants")),
+            CTX.allChildrenWithFilter(filterOnVariantInventory)));
 
     System.out.println("Result (MAP_KEYS only): " + Debug.print(regexList.getList(binName)));
 
@@ -147,7 +149,7 @@ public static void main(String[] args) throws IOException {
     Record cheapInStock = client.operate(null, key,
         CdtOperation.selectByPath(binName, Exp.SELECT_MATCHING_TREE,
             CTX.allChildren(),
-            CTX.allChildren(),
+            CTX.allChildrenWithFilter(filterOnFeatured),
             CTX.mapKey(Value.get("variants")),
             CTX.allChildrenWithFilter(filterOnCheapInStock)));
 
@@ -276,6 +278,11 @@ public static void main(String[] args) throws IOException {
     System.out.println("✅ Operation succeeded with NO_FAIL flag:");
     System.out.println(Debug.print(noFailResponse.getValue(binName)));
 
+    // Remove malformed data and return record to initial state
+    WritePolicy policy = new WritePolicy();
+    policy.recordExistsAction = RecordExistsAction.REPLACE;
+    client.put(policy, key, new Bin(binName, inventory));
+
     client.close();
   }
 }