[KIE-792] introducing prototypes (apache#5639)

* [KIE-792] introducing prototype dialect

* implement prototype field setting in consequence

* minor refactor

* rewrite prototype field access in consequence

* add dialect attribute to yaml rule format + test it in quarkus extension

* isolate prototypes in their own module

* introduce new public API for prototypes

* get rid of fact templates

* turn prototype dialect into a KieBase option

* implement access of map values via field notation in the mvel compiler

bom/drools-bom/pom.xml

@@ -630,6 +630,24 @@
         <type>test-jar</type>
         <scope>test</scope>
       </dependency>
+      <dependency>
+        <groupId>org.drools</groupId>
+        <artifactId>drools-model-prototype</artifactId>
+        <version>${project.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.drools</groupId>
+        <artifactId>drools-model-prototype</artifactId>
+        <version>${project.version}</version>
+        <classifier>sources</classifier>
+      </dependency>
+      <dependency>
+        <groupId>org.drools</groupId>
+        <artifactId>drools-model-prototype</artifactId>
+        <version>${project.version}</version>
+        <type>test-jar</type>
+        <scope>test</scope>
+      </dependency>
 
       <!-- Quarkus Extension -->
       <dependency>

drools-base/src/main/java/org/drools/base/base/ClassObjectType.java

@@ -185,7 +185,7 @@ public void setEvent(boolean isEvent) {
     }
 
     @Override
-    public boolean isTemplate() {
+    public boolean isPrototype() {
         return false;
     }
 

drools-base/src/main/java/org/drools/base/base/ObjectType.java

@@ -48,5 +48,5 @@ public interface ObjectType
 
     boolean hasField(String name);
 
-    boolean isTemplate();
+    boolean isPrototype();
 }

drools-base/src/main/java/org/drools/base/base/ValueType.java

@@ -27,8 +27,8 @@
 
 import org.drools.base.factmodel.traits.Thing;
 import org.drools.base.factmodel.traits.Trait;
-import org.drools.base.facttemplates.FactTemplate;
 import org.drools.util.CoercionUtil;
+import org.kie.api.prototype.Prototype;
 import org.kie.api.runtime.rule.EventHandle;
 
 public enum ValueType {
@@ -65,7 +65,7 @@ public enum ValueType {
     ARRAY_TYPE( "Array", Object[].class, SimpleValueType.LIST ),
     STRING_TYPE( "String", String.class, SimpleValueType.STRING, CoercionUtil::coerceToString ),
     OBJECT_TYPE( "Object", Object.class, SimpleValueType.OBJECT ),
-    FACTTEMPLATE_TYPE( "FactTemplate", FactTemplate.class, SimpleValueType.UNKNOWN ),
+    PROTOTYPE_TYPE("Prototype", Prototype.class, SimpleValueType.UNKNOWN ),
 
     EVENT_TYPE("Event", EventHandle.class, SimpleValueType.OBJECT ),
     QUERY_TYPE("Query", DroolsQuery.class, SimpleValueType.OBJECT ),
@@ -141,8 +141,8 @@ public static ValueType determineValueType(final Class<?> clazz) {
         }
 
         // primitives
-        if ( clazz == FactTemplate.class ) {
-            return ValueType.FACTTEMPLATE_TYPE;
+        if ( clazz == Prototype.class ) {
+            return ValueType.PROTOTYPE_TYPE;
         } else if ( clazz == DroolsQuery.class ) {
             return ValueType.QUERY_TYPE;
         } else if ( clazz == Character.TYPE ) {

drools-base/src/main/java/org/drools/base/definitions/InternalKnowledgePackage.java

@@ -30,7 +30,6 @@
 import org.drools.base.base.AcceptsClassObjectType;
 import org.drools.base.base.ObjectType;
 import org.drools.base.definitions.rule.impl.RuleImpl;
-import org.drools.base.facttemplates.FactTemplate;
 import org.drools.base.rule.DialectRuntimeRegistry;
 import org.drools.base.rule.Function;
 import org.drools.base.rule.ImportDeclaration;
@@ -44,6 +43,7 @@
 import org.kie.api.definition.process.Process;
 import org.kie.api.definition.type.FactType;
 import org.kie.api.io.Resource;
+import org.kie.api.prototype.Prototype;
 import org.kie.api.runtime.rule.AccumulateFunction;
 import org.kie.internal.builder.KnowledgeBuilderResult;
 
@@ -98,7 +98,7 @@ public interface InternalKnowledgePackage extends KiePackage,
 
     void addTypeDeclaration(TypeDeclaration typeDecl);
 
-    void addFactTemplate(FactTemplate factTemplate);
+    void addPrototype(Prototype prototype);
 
     void addImport(ImportDeclaration importDecl);
 
@@ -141,7 +141,7 @@ public interface InternalKnowledgePackage extends KiePackage,
 
     TypeDeclaration getTypeDeclaration(String type);
 
-    FactTemplate getFactTemplate(String name);
+    Prototype getPrototype(String name);
 
     ClassLoader getPackageClassLoader();
 

drools-base/src/main/java/org/drools/base/definitions/impl/KnowledgePackageImpl.java

@@ -45,7 +45,6 @@
 import org.drools.base.definitions.ResourceTypePackageRegistry;
 import org.drools.base.definitions.rule.impl.GlobalImpl;
 import org.drools.base.definitions.rule.impl.RuleImpl;
-import org.drools.base.facttemplates.FactTemplate;
 import org.drools.base.rule.DialectRuntimeData;
 import org.drools.base.rule.DialectRuntimeRegistry;
 import org.drools.base.rule.DuplicateRuleNameException;
@@ -68,6 +67,7 @@
 import org.kie.api.definition.type.FactType;
 import org.kie.api.io.Resource;
 import org.kie.api.io.ResourceType;
+import org.kie.api.prototype.Prototype;
 import org.kie.api.runtime.rule.AccumulateFunction;
 
 public class KnowledgePackageImpl
@@ -103,7 +103,7 @@ public class KnowledgePackageImpl
 
     protected Map<String, Type> globals;
 
-    protected Map<String, FactTemplate> factTemplates;
+    protected Map<String, Prototype> prototypes;
 
     protected DialectRuntimeRegistry dialectRuntimeRegistry;
 
@@ -151,7 +151,7 @@ public KnowledgePackageImpl(final String name) {
         this.accumulateFunctions = Collections.emptyMap();
         this.staticImports = Collections.emptySet();
         this.globals = Collections.emptyMap();
-        this.factTemplates = Collections.emptyMap();
+        this.prototypes = Collections.emptyMap();
         this.functions = Collections.emptyMap();
         this.dialectRuntimeRegistry = new DialectRuntimeRegistry();
         this.entryPointsIds = Collections.emptySet();
@@ -243,7 +243,7 @@ public void writeExternal(ObjectOutput stream) throws IOException {
             out.writeObject(this.staticImports);
             out.writeObject(this.functions);
             out.writeObject(this.accumulateFunctions);
-            out.writeObject(this.factTemplates);
+            out.writeObject(this.prototypes);
             out.writeObject(this.globals);
             out.writeBoolean(this.valid);
             out.writeBoolean(this.needStreamMode);
@@ -289,7 +289,7 @@ public void readExternal(ObjectInput stream) throws IOException,
         this.staticImports = (Set) in.readObject();
         this.functions = (Map<String, Function>) in.readObject();
         this.accumulateFunctions = (Map<String, AccumulateFunction>) in.readObject();
-        this.factTemplates = (Map) in.readObject();
+        this.prototypes = (Map) in.readObject();
         this.globals = (Map<String, Type>) in.readObject();
         this.valid = in.readBoolean();
         this.needStreamMode = in.readBoolean();
@@ -445,17 +445,16 @@ public void removeFunction(final String functionName) {
     }
 
     @Override
-    public FactTemplate getFactTemplate(final String name) {
-        return this.factTemplates.get(name);
+    public Prototype getPrototype(final String name) {
+        return this.prototypes.get(name);
     }
 
     @Override
-    public void addFactTemplate(final FactTemplate factTemplate) {
-        if (this.factTemplates == Collections.EMPTY_MAP) {
-            this.factTemplates = new HashMap<>(1);
+    public void addPrototype(final Prototype prototype) {
+        if (this.prototypes == Collections.EMPTY_MAP) {
+            this.prototypes = new HashMap<>(1);
         }
-        this.factTemplates.put(factTemplate.getName(),
-                               factTemplate);
+        this.prototypes.put(prototype.getName(), prototype);
     }
 
     /**
@@ -586,7 +585,7 @@ public void clear() {
         this.accumulateFunctions.clear();
         this.staticImports.clear();
         this.globals.clear();
-        this.factTemplates.clear();
+        this.prototypes.clear();
         this.typeDeclarations.clear();
         this.windowDeclarations.clear();
     }