Fix the bug for parsing with only non-param gateway rules

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

sentinel-adapter/sentinel-api-gateway-adapter-common/src/main/java/com/alibaba/csp/sentinel/adapter/gateway/common/param/GatewayParamParser.java

@@ -62,10 +62,10 @@ public class GatewayParamParser<T> {
                 hasNonParamRule = true;
             }
         }
-        if (gatewayRules.isEmpty()) {
+        if (!hasNonParamRule && gatewayRules.isEmpty()) {
             return new Object[0];
         }
-        if (predSet.size() != 1 || predSet.contains(false)) {
+        if (predSet.size() > 1 || predSet.contains(false)) {
             return new Object[0];
         }
         int size = hasNonParamRule ? gatewayRules.size() + 1 : gatewayRules.size();

sentinel-adapter/sentinel-api-gateway-adapter-common/src/test/java/com/alibaba/csp/sentinel/adapter/gateway/common/param/GatewayParamParserTest.java

@@ -70,10 +70,15 @@ public class GatewayParamParserTest {
             .setCount(5)
             .setIntervalSec(1)
         );
+        rules.add(new GatewayFlowRule(routeId1)
+            .setCount(10)
+            .setControlBehavior(2)
+            .setMaxQueueingTimeoutMs(1000)
+        );
         GatewayRuleManager.loadRules(rules);
 
         Object[] params = parser.parseParameterFor(routeId1, request, routeIdPredicate);
-        assertThat(params.length).isZero();
+        assertThat(params.length).isEqualTo(1);
     }
 
     @Test

sentinel-adapter/sentinel-spring-cloud-gateway-adapter/src/test/java/com/alibaba/csp/sentinel/adapter/gateway/sc/SpringCloudGatewayParamParserTest.java

@@ -67,7 +67,7 @@ public class SpringCloudGatewayParamParserTest {
 
         Object[] params = paramParser.parseParameterFor(routeId1, exchange,
             e -> e.getResourceMode() == 0);
-        assertThat(params.length).isZero();
+        assertThat(params.length).isEqualTo(1);
     }
 
     @Test