NIFI-9272: When determining if Property dependency is satisfied, consider property default values also

Signed-off-by: Joe Gresock <jgresock@gmail.com>

This closes #5432.

nifi-mock/src/main/java/org/apache/nifi/util/MockValidationContext.java

@@ -293,12 +293,12 @@ public class MockValidationContext extends MockControllerServiceLookup implement
 
             @Override
             public PropertyValue getProperty(final PropertyDescriptor descriptor) {
-                return null;
+                return MockValidationContext.this.getProperty(descriptor);
             }
 
             @Override
             public Map<String, String> getAllProperties() {
-                return null;
+                return MockValidationContext.this.getAllProperties();
             }
         };
 

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-components/src/test/java/org/apache/nifi/processor/TestStandardValidationContext.java

@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.nifi.processor;
+
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.controller.PropertyConfiguration;
+import org.apache.nifi.controller.service.ControllerServiceProvider;
+import org.apache.nifi.parameter.StandardParameterTokenList;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.registry.VariableRegistry;
+import org.junit.Test;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+
+public class TestStandardValidationContext {
+
+    @Test
+    public void testPropertyDependencySatisfied() {
+        final ControllerServiceProvider csProvider = mock(ControllerServiceProvider.class);
+
+        final PropertyDescriptor descriptorA = new PropertyDescriptor.Builder()
+            .name("A")
+            .allowableValues("abc", "xyz")
+            .defaultValue("abc")
+            .build();
+
+        final PropertyDescriptor descriptorB = new PropertyDescriptor.Builder()
+            .name("B")
+            .required(true)
+            .dependsOn(descriptorA, "abc")
+            .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+            .build();
+        final PropertyConfiguration configurationB = null;
+
+        final Function<String, PropertyDescriptor> propertyLookup = propName -> propName.equals("A") ? descriptorA : null;
+
+        final Map<PropertyDescriptor, PropertyConfiguration> properties = new HashMap<>();
+        properties.put(descriptorB, configurationB);
+
+        StandardValidationContext context = new StandardValidationContext(csProvider, properties, null, "1234", "12345", VariableRegistry.EMPTY_REGISTRY, null, false);
+
+        // Property B's dependency should be satisfied because A = "abc"
+        assertTrue(context.isDependencySatisfied(descriptorB, propertyLookup));
+
+        // Property A's dependency is always satisfied b/c no dependency
+        assertTrue(context.isDependencySatisfied(descriptorA, propertyLookup));
+
+        properties.put(descriptorA, new PropertyConfiguration("xyz", new StandardParameterTokenList("xyz", Collections.emptyList()), Collections.emptyList()));
+        context = new StandardValidationContext(csProvider, properties, null, "1234", "12345", VariableRegistry.EMPTY_REGISTRY, null, false);
+
+        // Should not be satisfied because A = "xyz".
+        assertFalse(context.isDependencySatisfied(descriptorB, propertyLookup));
+
+        // Property A's dependency should still (always) satisfied b/c no dependency
+        assertTrue(context.isDependencySatisfied(descriptorA, propertyLookup));
+    }
+
+}

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core-api/src/main/java/org/apache/nifi/components/validation/AbstractValidationContext.java

@@ -19,6 +19,7 @@ package org.apache.nifi.components.validation;
 
 import org.apache.nifi.components.PropertyDependency;
 import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.PropertyValue;
 import org.apache.nifi.components.ValidationContext;
 import org.apache.nifi.controller.PropertyConfiguration;
 import org.apache.nifi.parameter.ParameterLookup;
@@ -70,13 +71,8 @@ public abstract class AbstractValidationContext implements ValidationContext {
                     return false;
                 }
 
-                final PropertyConfiguration dependencyConfiguration = properties.get(dependencyDescriptor);
-                if (dependencyConfiguration == null) {
-                    logger.debug("Dependency for {} is not satisfied because it has a dependency on {}, which does not have a value", propertyDescriptor, dependencyName);
-                    return false;
-                }
-
-                final String dependencyValue = dependencyConfiguration.getEffectiveValue(parameterLookup);
+                final PropertyValue propertyValue = getProperty(dependencyDescriptor);
+                final String dependencyValue = propertyValue == null ? dependencyDescriptor.getDefaultValue() : propertyValue.getValue();
                 if (dependencyValue == null) {
                     logger.debug("Dependency for {} is not satisfied because it has a dependency on {}, which has a null value", propertyDescriptor, dependencyName);
                     return false;