pass cascade flag from fk to reference, respect cascade flag in deleteDependencies

wizard-common/src/main/java/org/cobbzilla/wizard/model/entityconfig/EntityFieldReference.java

@@ -2,6 +2,7 @@ package org.cobbzilla.wizard.model.entityconfig;
 
 import lombok.*;
 
+import static org.cobbzilla.util.daemon.ZillaRuntime.bool;
 import static org.cobbzilla.util.daemon.ZillaRuntime.empty;
 
 /**
@@ -11,9 +12,10 @@ import static org.cobbzilla.util.daemon.ZillaRuntime.empty;
 @NoArgsConstructor @EqualsAndHashCode(of={"entity", "field"}) @ToString(of={"entity", "field"})
 public class EntityFieldReference {
 
-    public EntityFieldReference (String entity, String field) {
+    public EntityFieldReference (String entity, String field, Boolean cascade) {
         this.entity = entity;
         this.field = field;
+        this.cascade = cascade;
     }
 
     /** A special value that can be used by child entities to indicate that the lexically enclosing entity is their parent. */
@@ -36,4 +38,8 @@ public class EntityFieldReference {
      */
     @Getter @Setter private String finder;
 
+    /** Should a deletion of an entity cascade to the entity referenced? */
+    @Getter @Setter private Boolean cascade;
+    public boolean cascade() { return bool(cascade); }
+
 }

wizard-common/src/main/java/org/cobbzilla/wizard/model/entityconfig/EntityReferences.java

@@ -85,7 +85,7 @@ public class EntityReferences {
         Arrays.stream(dependencyOrParent.getDeclaredFields())
                 .filter(FIELD_HAS_FK)
                 .filter(f -> f.getAnnotation(ECForeignKey.class).entity().equals(entityClass))
-                .forEach(f -> refs.add(new EntityFieldReference(dependency.getName(), f.getName())));
+                .forEach(f -> refs.add(new EntityFieldReference(dependency.getName(), f.getName(), f.getAnnotation(ECForeignKey.class).cascade())));
         refs.addAll(getDependencyRefs(entityClass, dependency, dependencyOrParent.getSuperclass(), refs));
         return refs;
     }

wizard-server/src/main/java/org/cobbzilla/wizard/server/config/PgRestServerConfiguration.java

@@ -347,12 +347,12 @@ public class PgRestServerConfiguration extends RestServerConfiguration implement
         return reversed;
     }
 
-    private Map<Class<? extends Identifiable>, List<Class<? extends Identifiable>>> dependencyCache = new ConcurrentHashMap<>();
+    private final Map<Class<? extends Identifiable>, List<Class<? extends Identifiable>>> dependencyCache = new ConcurrentHashMap<>();
     public List<Class<? extends Identifiable>> getDependencies (Class<? extends Identifiable> entityClass) {
         return dependencyCache.computeIfAbsent(entityClass, c -> getDependentEntities(entityClass, getEntityClassesReverse()));
     }
 
-    private Map<Class<? extends Identifiable>, Collection<EntityFieldReference>> dependencyDAOCache = new ConcurrentHashMap<>();
+    private final Map<Class<? extends Identifiable>, Collection<EntityFieldReference>> dependencyDAOCache = new ConcurrentHashMap<>();
     public Collection<EntityFieldReference> dependencyRefs(Class<? extends Identifiable> entityClass) {
         return dependencyDAOCache.computeIfAbsent(entityClass, c -> getDependencyRefs(c, getDependencies(c)));
     }
@@ -364,6 +364,10 @@ public class PgRestServerConfiguration extends RestServerConfiguration implement
                                     final Collection<String> excludeDepFields) {
         dependencyRefs(thing.getClass()).forEach(
                 dep -> {
+                    if (!dep.cascade()) {
+                        log.debug("deleteDependencies("+thing+"): excluding due to cascade=false: "+dep);
+                        return;
+                    }
                     if (excludeDepClasses != null && excludeDepClasses.stream().anyMatch(depClass -> depClass.getName().equals(dep.getEntity()))) {
                         log.debug("deleteDependencies("+thing+"): excluding by dep class: "+dep);
                         return;