Instantiate collections for DynamicType properties (#2256)

Author: timtatt

foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/dynamic/DynamicTypeBuilder.java

@@ -41,6 +41,7 @@
 import org.eclipse.persistence.mappings.OneToOneMapping;
 import org.eclipse.persistence.mappings.converters.EnumTypeConverter;
 import org.eclipse.persistence.mappings.foundation.AbstractDirectMapping;
+import org.eclipse.persistence.oxm.mappings.XMLCompositeCollectionMapping;
 import org.eclipse.persistence.platform.database.DatabasePlatform;
 import org.eclipse.persistence.platform.xml.XMLParser;
 import org.eclipse.persistence.platform.xml.XMLPlatformFactory;
@@ -214,6 +215,9 @@ private boolean requiresInitialization(DatabaseMapping mapping) {
         if (mapping.isDirectToFieldMapping() && mapping.getAttributeClassification() != null && mapping.getAttributeClassification().isPrimitive()) {
             return true;
         }
+        if (mapping.isCollectionMapping()) {
+            return true;
+        }
         if (mapping.isForeignReferenceMapping()) {
             ForeignReferenceMapping frMapping = (ForeignReferenceMapping) mapping;
             return frMapping.usesIndirection() || frMapping.isCollectionMapping();

foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/internal/dynamic/DynamicPropertiesInitializatonPolicy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2021 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2024 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
@@ -78,6 +78,9 @@ else if (primClass == ClassConstants.PBYTE) {
                 value = Byte.MIN_VALUE;
             }
         }
+        else if (mapping.isCollectionMapping()) {
+           value = mapping.getContainerPolicy().containerInstance();
+        }
         else if (mapping.isForeignReferenceMapping()) {
             ForeignReferenceMapping refMapping = (ForeignReferenceMapping)mapping;
             if (refMapping.usesIndirection() &&

moxy/org.eclipse.persistence.moxy/src/test/java/org/eclipse/persistence/testing/jaxb/dynamic/DynamicJAXBCollectionTestCases.java

@@ -22,6 +22,7 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.Vector;
+import java.util.ArrayList;
 
 import jakarta.xml.bind.JAXBElement;
 import jakarta.xml.bind.Marshaller;
@@ -33,6 +34,7 @@
 import org.eclipse.persistence.jaxb.JAXBContextProperties;
 import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
 import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory;
+import org.eclipse.persistence.oxm.NamespaceResolver;
 import org.eclipse.persistence.testing.jaxb.dynamic.util.MyList;
 import org.w3c.dom.Document;
 
@@ -65,6 +67,23 @@ public void testXSDSingleListUnmarshal() throws Exception {
         assertEquals("Incorrect phoneNumber type.", "work", firstPhoneNumber.get("type"));
     }
 
+    public void testXSDInstantiateList() throws Exception {
+        InputStream schemaStream = ClassLoader.getSystemResourceAsStream(XSD_SINGLE);
+        jaxbContext = DynamicJAXBContextFactory.createContextFromXSD(schemaStream, null, null, null);
+
+        var customer = jaxbContext.newDynamicEntity("Customer");
+
+        assertNotNull(customer.get("phoneNumbers"));
+
+        var resolver = new NamespaceResolver();
+        resolver.setDefaultNamespaceURI("www.example.org/customer");
+
+        var phoneNumbers = jaxbContext.getValueByXPath(customer, "phone-numbers", resolver, Object.class);
+
+        assertNotNull(phoneNumbers);
+        assertEquals(ArrayList.class, phoneNumbers.getClass());
+    }
+
     public void testXSDMultipleListUnmarshal() throws Exception {
         InputStream schemaStream = ClassLoader.getSystemResourceAsStream(XSD_MULTI);
         jaxbContext = DynamicJAXBContextFactory.createContextFromXSD(schemaStream, null, null, null);