convert lists and maps for ValueNode (fixes #378)

json-path/src/main/java/com/jayway/jsonpath/internal/filter/ValueNode.java

@@ -359,19 +359,19 @@ public abstract class ValueNode {
         }
 
         public boolean isArray(Predicate.PredicateContext ctx) {
-            return ctx.configuration().jsonProvider().isArray(parse(ctx));
+            return parse(ctx) instanceof List;
         }
 
         public boolean isMap(Predicate.PredicateContext ctx) {
-            return ctx.configuration().jsonProvider().isMap(parse(ctx));
+            return parse(ctx) instanceof Map;
         }
 
         public int length(Predicate.PredicateContext ctx) {
-            return isArray(ctx) ? ctx.configuration().jsonProvider().length(parse(ctx)) : -1;
+            return isArray(ctx) ? ((List<?>) parse(ctx)).size() : -1;
         }
 
         public boolean isEmpty(Predicate.PredicateContext ctx) {
-            if (isArray(ctx) || isMap(ctx)) return ctx.configuration().jsonProvider().length(parse(ctx)) == 0;
+            if (isArray(ctx) || isMap(ctx)) return ((Collection<?>) parse(ctx)).size() == 0;
             else if((parse(ctx) instanceof String)) return ((String)parse(ctx)).length() == 0;
             return true;
         }
@@ -844,8 +844,8 @@ public abstract class ValueNode {
                     else if (res instanceof String) return ValueNode.createStringNode(res.toString(), false);
                     else if (res instanceof Boolean) return ValueNode.createBooleanNode(res.toString());
                     else if (res == null) return ValueNode.NULL_NODE;
-                    else if (ctx.configuration().jsonProvider().isArray(res)) return ValueNode.createJsonNode(res);
-                    else if (ctx.configuration().jsonProvider().isMap(res)) return ValueNode.createJsonNode(res);
+                    else if (ctx.configuration().jsonProvider().isArray(res)) return ValueNode.createJsonNode(ctx.configuration().mappingProvider().map(res, List.class, ctx.configuration()));
+                    else if (ctx.configuration().jsonProvider().isMap(res)) return ValueNode.createJsonNode(ctx.configuration().mappingProvider().map(res, Map.class, ctx.configuration()));
                     else throw new JsonPathException("Could not convert " + res.toString() + " to a ValueNode");
                 } catch (PathNotFoundException e) {
                     return ValueNode.UNDEFINED;

json-path/src/test/java/com/jayway/jsonpath/old/IssuesTest.java

@@ -13,8 +13,10 @@ import com.jayway.jsonpath.PathNotFoundException;
 import com.jayway.jsonpath.internal.Utils;
 import com.jayway.jsonpath.spi.cache.LRUCache;
 import com.jayway.jsonpath.spi.json.GsonJsonProvider;
+import com.jayway.jsonpath.spi.json.JacksonJsonNodeJsonProvider;
 import com.jayway.jsonpath.spi.json.JsonProvider;
 import com.jayway.jsonpath.spi.mapper.GsonMappingProvider;
+import com.jayway.jsonpath.spi.mapper.JacksonMappingProvider;
 import com.jayway.jsonpath.spi.mapper.MappingException;
 import net.minidev.json.JSONAware;
 import net.minidev.json.parser.JSONParser;
@@ -1019,4 +1021,30 @@ public class IssuesTest extends BaseTest {
         assertThat(doc.read("$.jsonArr[0].name")).isEqualTo("nOne");
         assertThat(doc.read("$.jsonArr[1].name")).isEqualTo("Jayway");
     }
+    
+    @Test
+    public void issue_378(){
+
+        String json = "{\n" +
+            "    \"nodes\": {\n" +
+            "        \"unnamed1\": {\n" +
+            "            \"ntpServers\": [\n" +
+            "                \"1.2.3.4\"\n" +
+            "            ]\n" +
+            "        }\n" +
+            "    }\n" +
+            "}";
+
+        Configuration configuration = Configuration.builder()
+            .jsonProvider(new JacksonJsonNodeJsonProvider())
+            .mappingProvider(new JacksonMappingProvider())
+            .build();
+        
+        DocumentContext ctx = JsonPath.using(configuration).parse(json);
+
+        String path = "$.nodes[*][?(!([\"1.2.3.4\"] subsetof @.ntpServers))].ntpServers";
+        JsonPath jsonPath = JsonPath.compile(path);
+
+        ctx.read(jsonPath);
+    }
 }