.gitlab-ci.yml

@@ -21,7 +21,7 @@ build:
     - ./gradlew --console=plain --no-daemon assemble jar
   artifacts:
     paths:
-      - "/builds/jastadd/ragconnect/ragconnect.base/build/libs/ragconnect-*.jar"
+      - "ragconnect.base/build/libs/ragconnect-*.jar"
     expire_in: 1 week
 
 test:
@@ -32,9 +32,14 @@ test:
       alias: "mqtt"
   script:
     - ./gradlew --console=plain --no-daemon allTests
+    - ls -lh
+    - ls -lh ragconnect.tests
+    - ls -lh ragconnect.tests/build/test-results/
+    - ls -lh ragconnect.tests/build/test-results/allTests
   artifacts:
+    when: always
     reports:
-      junit: "/builds/jastadd/ragconnect/ragconnect.tests/build/test-results/test/TEST-*.xml"
+      junit: "ragconnect.tests/build/test-results/**/TEST-*.xml"
     expire_in: 1 week
 
 publish:

.gitmodules

 [submodule "relast-preprocessor"]
 	path = relast-preprocessor
 	url = ../relast-preprocessor.git
+  branch = jastadd-fix-inc-param-debug
 [submodule "ragconnect.base/src/main/jastadd/mustache"]
 	path = ragconnect.base/src/main/jastadd/mustache
 	url = ../mustache

ragconnect.base/src/main/jastadd/Analysis.jrag

@@ -12,6 +12,19 @@ aspect Analysis {
     return result;
   }
 
+  // --- lookupTypeEndpointDefinition ---
+  inh java.util.List<TypeEndpointDefinition> TypeEndpointDefinition.lookupTypeEndpointDefinitions(TypeComponent type);
+  eq RagConnect.getEndpointDefinition().lookupTypeEndpointDefinitions(TypeComponent type) = lookupTypeEndpointDefinitions(type);
+  syn java.util.List<TypeEndpointDefinition> RagConnect.lookupTypeEndpointDefinitions(TypeComponent type) {
+    java.util.List<TypeEndpointDefinition> result = new java.util.ArrayList<>();
+    for (EndpointDefinition def : getEndpointDefinitionList()) {
+      if (def.isTypeEndpointDefinition() && def.asTypeEndpointDefinition().getType().equals(type)) {
+        result.add(def.asTypeEndpointDefinition());
+      }
+    }
+    return result;
+  }
+
   // --- lookupDependencyDefinition ---
   inh DependencyDefinition DependencyDefinition.lookupDependencyDefinition(TypeDecl source, String id);
   eq RagConnect.getDependencyDefinition().lookupDependencyDefinition(TypeDecl source, String id) {
@@ -31,10 +44,12 @@ aspect Analysis {
   }
   syn boolean DependencyDefinition.isAlreadyDefined() = lookupDependencyDefinition(getSource().containingTypeDecl(), getID()) != this;
 
+  // --- matchesType ---
   syn boolean TokenEndpointDefinition.matchesType(TokenEndpointDefinition other);
   eq ReceiveTokenEndpointDefinition.matchesType(TokenEndpointDefinition other) = other.isReceiveTokenEndpointDefinition();
   eq SendTokenEndpointDefinition.matchesType(TokenEndpointDefinition other) = other.isSendTokenEndpointDefinition();
 
+  // --- assignableTo ---
   syn boolean MappingDefinitionType.assignableTo(JavaTypeUse target);
   eq JavaMappingDefinitionType.assignableTo(JavaTypeUse target) = getType().assignableTo(target);
   eq JavaArrayMappingDefinitionType.assignableTo(JavaTypeUse target) {
@@ -65,6 +80,7 @@ aspect Analysis {
 
   // --- shouldSendValue ---
   syn boolean TokenEndpointDefinition.shouldSendValue() = isSendTokenEndpointDefinition() && !getToken().getNTA();
+  syn boolean TypeEndpointDefinition.shouldSendValue() = isSendTypeEndpointDefinition() && !getType().getNTA();
 
   // --- needProxyToken ---
   syn boolean TokenComponent.needProxyToken() = !getDependencySourceDefinitionList().isEmpty() || getTokenEndpointDefinitionList().stream().anyMatch(TokenEndpointDefinition::shouldSendValue);

ragconnect.base/src/main/jastadd/Configuration.jadd

@@ -4,4 +4,5 @@ aspect Configuration {
   public static TypeDecl ASTNode.rootNode;
   public static boolean ASTNode.usesMqtt;
   public static boolean ASTNode.usesRest;
+  public static boolean ASTNode.incrementalOptionActive;
 }

ragconnect.base/src/main/jastadd/Errors.jrag

@@ -32,6 +32,10 @@ aspect Errors {
       when isAlreadyDefined()
       to RagConnect.errors();
 
+    SendTypeEndpointDefinition contributes error("At least one mapping needs to be used")
+      when effectiveMappings().isEmpty()
+      to RagConnect.errors();
+
     DependencyDefinition contributes error("Dependency definition already defined for " + getSource().containingTypeDecl().getName() + " with name " + getID())
       when isAlreadyDefined()
       to RagConnect.errors();

ragconnect.base/src/main/jastadd/NameResolution.jrag

@@ -11,4 +11,20 @@ aspect NameResolution {
     return null;
   }
 
+  refine RefResolverStubs eq ASTNode.globallyResolveTypeComponentByToken(String id) {
+    // return a TypeComponent. id is of the form 'parent_type_name + "." + child_type_name'
+    int dotIndex = id.indexOf(".");
+    String parentTypeName = id.substring(0, dotIndex);
+    String childTypeName = id.substring(dotIndex + 1);
+    TypeDecl type = program().resolveTypeDecl(parentTypeName);
+    // iterate over components and find the matching typeComponent
+    for (Component comp : type.getComponentList()) {
+      if (comp.isTypeComponent() && comp.getName().equals(childTypeName)) {
+        return comp.asTypeComponent();
+      }
+    }
+    System.err.println("Could not resolve TypeComponent '" + id + "'.");
+    return null;
+  }
+
 }

ragconnect.base/src/main/jastadd/Navigation.jrag

@@ -27,13 +27,13 @@ aspect Navigation {
   syn TokenEndpointDefinition EndpointDefinition.asTokenEndpointDefinition() = null;
   eq TokenEndpointDefinition.asTokenEndpointDefinition() = this;
 
-  // --- isSendTokenEndpointDefinition ---
-  syn boolean EndpointDefinition.isSendTokenEndpointDefinition() = false;
-  eq SendTokenEndpointDefinition.isSendTokenEndpointDefinition() = true;
+  // --- isTypeEndpointDefinition ---
+  syn boolean EndpointDefinition.isTypeEndpointDefinition() = false;
+  eq TypeEndpointDefinition.isTypeEndpointDefinition() = true;
 
-  // --- asSendTokenEndpointDefinition ---
-  syn SendTokenEndpointDefinition EndpointDefinition.asSendTokenEndpointDefinition() = null;
-  eq SendTokenEndpointDefinition.asSendTokenEndpointDefinition() = this;
+  // --- asTypeEndpointDefinition ---
+  syn TypeEndpointDefinition EndpointDefinition.asTypeEndpointDefinition() = null;
+  eq TypeEndpointDefinition.asTypeEndpointDefinition() = this;
 
   // --- isReceiveTokenEndpointDefinition ---
   syn boolean EndpointDefinition.isReceiveTokenEndpointDefinition() = false;
@@ -43,6 +43,30 @@ aspect Navigation {
   syn ReceiveTokenEndpointDefinition EndpointDefinition.asReceiveTokenEndpointDefinition() = null;
   eq ReceiveTokenEndpointDefinition.asReceiveTokenEndpointDefinition() = this;
 
+  // --- isSendTokenEndpointDefinition ---
+  syn boolean EndpointDefinition.isSendTokenEndpointDefinition() = false;
+  eq SendTokenEndpointDefinition.isSendTokenEndpointDefinition() = true;
+
+  // --- asSendTokenEndpointDefinition ---
+  syn SendTokenEndpointDefinition EndpointDefinition.asSendTokenEndpointDefinition() = null;
+  eq SendTokenEndpointDefinition.asSendTokenEndpointDefinition() = this;
+
+  // --- isReceiveTypeEndpointDefinition ---
+  syn boolean EndpointDefinition.isReceiveTypeEndpointDefinition() = false;
+  eq ReceiveTypeEndpointDefinition.isReceiveTypeEndpointDefinition() = true;
+
+  // --- asReceiveTypeEndpointDefinition ---
+  syn ReceiveTypeEndpointDefinition EndpointDefinition.asReceiveTypeEndpointDefinition() = null;
+  eq ReceiveTypeEndpointDefinition.asReceiveTypeEndpointDefinition() = this;
+
+  // --- isSendTypeEndpointDefinition ---
+  syn boolean EndpointDefinition.isSendTypeEndpointDefinition() = false;
+  eq SendTypeEndpointDefinition.isSendTypeEndpointDefinition() = true;
+
+  // --- asSendTypeEndpointDefinition ---
+  syn SendTypeEndpointDefinition EndpointDefinition.asSendTypeEndpointDefinition() = null;
+  eq SendTypeEndpointDefinition.asSendTypeEndpointDefinition() = this;
+
   // --- targetEndpointDefinition ---
   syn SendTokenEndpointDefinition DependencyDefinition.targetEndpointDefinition() {
     // resolve definition in here, as we do not need resolveMethod in any other place (yet)

ragconnect.base/src/main/jastadd/RagConnect.relast

@@ -10,6 +10,12 @@ rel TokenEndpointDefinition.Token <-> TokenComponent.TokenEndpointDefinition*;
 ReceiveTokenEndpointDefinition : TokenEndpointDefinition;
 SendTokenEndpointDefinition : TokenEndpointDefinition;
 
+abstract TypeEndpointDefinition : EndpointDefinition;
+rel TypeEndpointDefinition.Type <-> TypeComponent.TypeEndpointDefinition*;
+
+ReceiveTypeEndpointDefinition : TypeEndpointDefinition;
+SendTypeEndpointDefinition : TypeEndpointDefinition;
+
 DependencyDefinition ::= <ID>;
 rel DependencyDefinition.Source <-> TokenComponent.DependencySourceDefinition*;
 rel DependencyDefinition.Target -> TokenComponent;

ragconnect.base/src/main/jastadd/intermediate/Generation.jadd

@@ -18,29 +18,42 @@ aspect AttributesForMustache {
   // --- MEndpointDefinition ---
   syn String MEndpointDefinition.preemptiveExpectedValue();
   syn String MEndpointDefinition.preemptiveReturn();
-  syn TokenEndpointDefinition MEndpointDefinition.endpointDef();
+  syn EndpointDefinition MEndpointDefinition.endpointDef();
   syn String MEndpointDefinition.firstInputVarName();
+  syn String MEndpointDefinition.parentTypeName();
+  syn String MEndpointDefinition.entityName();
 
   eq MEndpointDefinition.getInnerMappingDefinition(int i).isLast() = i == getNumInnerMappingDefinition() - 1;
   eq MEndpointDefinition.getInnerMappingDefinition(int i).inputVarName() = i == 0 ? firstInputVarName() : getInnerMappingDefinition(i - 1).outputVarName();
 
   syn String MEndpointDefinition.connectParameterName() = "uriString";
-  syn String MEndpointDefinition.connectMethod() = "connect" + tokenName();
+  syn String MEndpointDefinition.connectMethod() = "connect" + entityName();
 
   syn String MEndpointDefinition.disconnectMethod() {
     // if both (send and receive) are defined for the token, ensure methods with different names
-    String extra = endpointDef().lookupTokenEndpointDefinitions(token()).size() > 1 ? uniqueSuffix() : "";
-    return "disconnect" + extra + tokenName();
+    String extra;
+    if (endpointDef().isTokenEndpointDefinition()) {
+      extra = endpointDef().asTokenEndpointDefinition().lookupTokenEndpointDefinitions(token()).size() > 1 ? uniqueSuffix() : "";
+    } else if (endpointDef().isTypeEndpointDefinition()) {
+      extra = endpointDef().asTypeEndpointDefinition().lookupTypeEndpointDefinitions(type()).size() > 1 ? uniqueSuffix() : "";
+    } else {
+      extra = "";
+    }
+    return "disconnect" + extra + entityName();
   }
-  //
+
   syn String MEndpointDefinition.uniqueSuffix();
-  eq MSendDefinition.uniqueSuffix() = "Send";
-  eq MReceiveDefinition.uniqueSuffix() = "Receive";
+  eq MTokenSendDefinition.uniqueSuffix() = "Send";
+  eq MTokenReceiveDefinition.uniqueSuffix() = "Receive";
+  eq MTypeSendDefinition.uniqueSuffix() = "Send";
+  eq MTypeReceiveDefinition.uniqueSuffix() = "Receive";
 
-  syn TokenComponent MEndpointDefinition.token() = endpointDef().getToken();
+  // TODO potentially dangerous because asXEndpointDefinition can return null
+  syn TokenComponent MEndpointDefinition.token() = endpointDef().asTokenEndpointDefinition().getToken();
+  syn TypeComponent MEndpointDefinition.type() = endpointDef().asTypeEndpointDefinition().getType();
   syn boolean MEndpointDefinition.alwaysApply() = endpointDef().getAlwaysApply();
-  syn String MEndpointDefinition.parentTypeName() = token().containingTypeDecl().getName();
   syn String MEndpointDefinition.tokenName() = token().getName();
+  syn String MEndpointDefinition.typeName() = type().getName();
   syn MInnerMappingDefinition MEndpointDefinition.lastDefinition() = getInnerMappingDefinition(getNumInnerMappingDefinition() - 1);
   syn String MEndpointDefinition.lastDefinitionToType() = lastDefinition().toType();
   syn String MEndpointDefinition.lastResult() = lastDefinition().outputVarName();
@@ -51,12 +64,20 @@ aspect AttributesForMustache {
     if (token().isPrimitiveType() && lastDefinition().mappingDef().getToType().isPrimitiveType()) {
       return preemptiveExpectedValue() + " == " + lastResult();
     }
-    if (lastDefinition().mappingDef().isDefaultMappingDefinition()) {
+    if (lastDefinition().mappingDef().getToType().isPrimitiveType() || lastDefinition().mappingDef().isDefaultMappingDefinition()) {
       return preemptiveExpectedValue() + " != null && " + preemptiveExpectedValue() + ".equals(" + lastResult() + ")";
     }
     return preemptiveExpectedValue() + " != null ? " + preemptiveExpectedValue() + ".equals(" + lastResult() + ") : " + lastResult() + " == null";
   }
 
+  // --- MTokenEndpointDefinition ---
+  eq MTokenEndpointDefinition.parentTypeName() = token().containingTypeDecl().getName();
+  eq MTokenEndpointDefinition.entityName() = tokenName();
+
+  // --- MTypeEndpointDefinition ---
+  eq MTypeEndpointDefinition.parentTypeName() = type().containingTypeDecl().getName();
+  eq MTypeEndpointDefinition.entityName() = typeName();
+
   // --- MInnerMappingDefinition ---
   inh boolean MInnerMappingDefinition.isLast();
   inh String MInnerMappingDefinition.inputVarName();
@@ -65,24 +86,43 @@ aspect AttributesForMustache {
   syn MappingDefinition MInnerMappingDefinition.mappingDef() = getMMappingDefinition().getMappingDefinition();
   syn String MInnerMappingDefinition.outputVarName() = "result" + methodName();  // we do not need "_" in between here, because methodName begins with one
 
-  // --- MReceiveDefinition ---
-  eq MReceiveDefinition.preemptiveExpectedValue() = "get" + tokenName() + "()";
-  eq MReceiveDefinition.preemptiveReturn() = "return;";
-  eq MReceiveDefinition.endpointDef() = getReceiveTokenEndpointDefinition();
-  eq MReceiveDefinition.firstInputVarName() = "message";
-
-  // --- MSendDefinition ---
-  eq MSendDefinition.preemptiveExpectedValue() = lastValue();
-  eq MSendDefinition.preemptiveReturn() = "return false;";
-  eq MSendDefinition.endpointDef() = getSendTokenEndpointDefinition();
-  eq MSendDefinition.firstInputVarName() = "get" + tokenName() + "()";
-
-  syn String MSendDefinition.sender() = "_sender_" + tokenName();
-  syn String MSendDefinition.lastValue() = "_lastValue" + tokenName();
-  syn String MSendDefinition.updateMethod() = "_update_" + tokenName();
-  syn String MSendDefinition.writeMethod() = "_writeLastValue_" + tokenName();
-  syn String MSendDefinition.tokenResetMethod() = "get" + tokenName() + "_reset";
-  syn boolean MSendDefinition.shouldSendValue() = endpointDef().shouldSendValue();
+  // --- MTokenReceiveDefinition ---
+  eq MTokenReceiveDefinition.preemptiveExpectedValue() = "get" + tokenName() + "()";
+  eq MTokenReceiveDefinition.preemptiveReturn() = "return;";
+  eq MTokenReceiveDefinition.endpointDef() = getReceiveTokenEndpointDefinition();
+  eq MTokenReceiveDefinition.firstInputVarName() = "message";
+
+  // --- MTokenSendDefinition ---
+  eq MTokenSendDefinition.preemptiveExpectedValue() = lastValue();
+  eq MTokenSendDefinition.preemptiveReturn() = "return false;";
+  eq MTokenSendDefinition.endpointDef() = getSendTokenEndpointDefinition();
+  eq MTokenSendDefinition.firstInputVarName() = "get" + tokenName() + "()";
+
+  syn String MTokenSendDefinition.sender() = "_sender_" + tokenName();
+  syn String MTokenSendDefinition.lastValue() = "_lastValue" + tokenName();
+  syn String MTokenSendDefinition.updateMethod() = "_update_" + tokenName();
+  syn String MTokenSendDefinition.writeMethod() = "_writeLastValue_" + tokenName();
+  syn String MTokenSendDefinition.tokenResetMethod() = "get" + tokenName() + "_reset";
+  syn boolean MTokenSendDefinition.shouldSendValue() = endpointDef().asTokenEndpointDefinition().shouldSendValue();
+
+  // MTypeReceiveDefinition
+  eq MTypeReceiveDefinition.preemptiveExpectedValue() = null;
+  eq MTypeReceiveDefinition.preemptiveReturn() = null;
+  eq MTypeReceiveDefinition.endpointDef() = getReceiveTypeEndpointDefinition();
+  eq MTypeReceiveDefinition.firstInputVarName() = null;
+
+  // MTypeSendDefinition
+  eq MTypeSendDefinition.preemptiveExpectedValue() = null;
+  eq MTypeSendDefinition.preemptiveReturn() = null;
+  eq MTypeSendDefinition.endpointDef() = getSendTypeEndpointDefinition();
+  eq MTypeSendDefinition.firstInputVarName() = null;
+
+  syn String MTypeSendDefinition.sender() = "_sender_" + typeName();
+  syn String MTypeSendDefinition.lastValue() = "_lastValue" + typeName();
+  syn String MTypeSendDefinition.updateMethod() = "_update_" + typeName();
+  syn String MTypeSendDefinition.writeMethod() = "_writeLastValue_" + typeName();
+  syn String MTypeSendDefinition.tokenResetMethod() = "get" + typeName() + "_reset";
+  syn boolean MTypeSendDefinition.shouldSendValue() = endpointDef().asTypeEndpointDefinition().shouldSendValue();
 
   // --- MMappingDefinition ---
   syn String MMappingDefinition.toType() = getMappingDefinition().getToType().prettyPrint();
@@ -96,7 +136,7 @@ aspect AttributesForMustache {
   syn String MDependencyDefinition.dependencyMethod() = "add" + capitalize(getDependencyDefinition().getID());
   syn String MDependencyDefinition.sourceParentTypeName() = getDependencyDefinition().getSource().containingTypeDecl().getName();
   syn String MDependencyDefinition.internalRelationPrefix() = "_internal_" + getDependencyDefinition().getID();
-  syn nta MSendDefinition MDependencyDefinition.targetEndpointDefinition() {
+  syn nta MTokenSendDefinition MDependencyDefinition.targetEndpointDefinition() {
     return getDependencyDefinition().targetEndpointDefinition().toMustache();
   }
 
@@ -110,7 +150,7 @@ aspect AttributesForMustache {
   syn String MTokenComponent.javaType() = getTokenComponent().effectiveJavaTypeUse().prettyPrint();
   syn String MTokenComponent.internalName() = getTokenComponent().needProxyToken() ? "_internal_" + name() : externalName();
   syn String MTokenComponent.externalName() = name();
-  syn MSendDefinition MTokenComponent.normalTokenSendDef() {
+  syn MTokenSendDefinition MTokenComponent.normalTokenSendDef() {
     for (TokenEndpointDefinition endpointDef : getTokenComponent().getTokenEndpointDefinitionList()) {
       if (endpointDef.shouldSendValue()) {
         return endpointDef.asSendTokenEndpointDefinition().toMustache();
@@ -124,11 +164,16 @@ aspect AttributesForMustache {
     MRagConnect result = new MRagConnect();
     result.setRagConnect(this);
     for (EndpointDefinition def : getEndpointDefinitionList()) {
-      if (def.isSendTokenEndpointDefinition()) {
-        SendTokenEndpointDefinition sendDef = def.asSendTokenEndpointDefinition();
-        result.addSendDefinition(sendDef.toMustache());
+      if (def.isReceiveTokenEndpointDefinition()) {
+        result.addTokenReceiveDefinition(def.asReceiveTokenEndpointDefinition().toMustache());
+      } else if (def.isSendTokenEndpointDefinition()) {
+        result.addTokenSendDefinition(def.asSendTokenEndpointDefinition().toMustache());
+      } else if (def.isReceiveTypeEndpointDefinition()) {
+        result.addTypeReceiveDefinition(def.asReceiveTypeEndpointDefinition().toMustache());
+      } else if (def.isSendTypeEndpointDefinition()) {
+        result.addTypeSendDefinition(def.asSendTypeEndpointDefinition().toMustache());
       } else {
-        result.addReceiveDefinition(def.asReceiveTokenEndpointDefinition().toMustache());
+        throw new RuntimeException("Unknown endpoint definition: " + def);
       }
     }
     for (MappingDefinition def : allMappingDefinitions()) {
@@ -163,20 +208,34 @@ aspect AttributesForMustache {
     }
   }
 
-  syn lazy MReceiveDefinition ReceiveTokenEndpointDefinition.toMustache() {
-    MReceiveDefinition result = new MReceiveDefinition();
+  syn lazy MTokenReceiveDefinition ReceiveTokenEndpointDefinition.toMustache() {
+    MTokenReceiveDefinition result = new MTokenReceiveDefinition();
     result.setReceiveTokenEndpointDefinition(this);
     result.addInnerMappings();
     return result;
   }
 
-  syn lazy MSendDefinition SendTokenEndpointDefinition.toMustache() {
-    MSendDefinition result = new MSendDefinition();
+  syn lazy MTokenSendDefinition SendTokenEndpointDefinition.toMustache() {
+    MTokenSendDefinition result = new MTokenSendDefinition();
     result.setSendTokenEndpointDefinition(this);
     result.addInnerMappings();
     return result;
   }
 
+  syn lazy MTypeReceiveDefinition ReceiveTypeEndpointDefinition.toMustache() {
+    MTypeReceiveDefinition result = new MTypeReceiveDefinition();
+    result.setReceiveTypeEndpointDefinition(this);
+    result.addInnerMappings();
+    return result;
+  }
+
+  syn lazy MTypeSendDefinition SendTypeEndpointDefinition.toMustache() {
+    MTypeSendDefinition result = new MTypeSendDefinition();
+    result.setSendTypeEndpointDefinition(this);
+    result.addInnerMappings();
+    return result;
+  }
+
   syn lazy MMappingDefinition MappingDefinition.toMustache() {
     MMappingDefinition result = new MMappingDefinition();
     result.setMappingDefinition(this);

ragconnect.base/src/main/jastadd/intermediate/Mappings.jrag

@@ -79,44 +79,32 @@ aspect DefaultMappings {
 
 aspect Mappings {
   // --- effectiveMappings ---
-  syn java.util.List<MappingDefinition> EndpointDefinition.effectiveMappings();
-  eq ReceiveTokenEndpointDefinition.effectiveMappings() {
-    // if there is a first mapping, check if it is suitable.
-    //  or if no mappings are specified.
-    // then prepend the suitable default mapping
+  syn java.util.List<MappingDefinition> EndpointDefinition.effectiveMappings() {
     java.util.List<MappingDefinition> result;
-    if (getMappingList().isEmpty() || !hasSuitableEdgeMapping()) {
-      result = new java.util.ArrayList();
-      result.add(suitableDefaultMapping());
-      result.addAll(getMappingList());
+    if (isReceiveTokenEndpointDefinition() || isReceiveTypeEndpointDefinition()) {
+      // if no mappings are specified, or if first mapping is not suitable.
+      // then prepend the suitable default mapping
+      if (getMappingList().isEmpty() || !getMappingList().get(0).getFromType().isByteArray()) {
+        result = new java.util.ArrayList();
+        result.add(suitableReceiveDefaultMapping());
+        result.addAll(getMappingList());
+      } else {
+        result = getMappingList();
+      }
+    } else if (isSendTokenEndpointDefinition() || isSendTypeEndpointDefinition()) {
+      // if no mappings are specified, or if last mapping is not suitable
+      // then append the suitable default mapping
+      if (getMappingList().isEmpty() || !getMappingList().get(getMappingList().size() - 1).getToType().isByteArray()) {
+        result = new java.util.ArrayList(getMappingList());
+        result.add(suitableSendDefaultMapping());
+      } else {
+        result = getMappingList();
+      }
     } else {
-      result = getMappingList();
+      throw new RuntimeException("Unknown endpoint definition: " + this);
     }
     return result;
   }
-  eq SendTokenEndpointDefinition.effectiveMappings() {
-    // if there is a mapping, check if it is suitable.
-    //  or if no mappings are specified.
-    // then append the suitable default mapping
-    java.util.List<MappingDefinition> result;
-    if (getMappingList().isEmpty() || !hasSuitableEdgeMapping()) {
-      result = new java.util.ArrayList(getMappingList());
-      result.add(suitableDefaultMapping());
-    } else {
-      result = getMappingList();
-    }
-    return result;
-  }
-
-  // --- hasSuitableEdgeMapping ---
-  syn boolean TokenEndpointDefinition.hasSuitableEdgeMapping();
-  eq ReceiveTokenEndpointDefinition.hasSuitableEdgeMapping() = isSuitableEdgeMapping(getMappingList().get(0));
-  eq SendTokenEndpointDefinition.hasSuitableEdgeMapping() = isSuitableEdgeMapping(getMappingList().get(getMappingList().size() - 1));
-
-  // --- isSuitableEdgeMapping(def) ---
-  syn boolean TokenEndpointDefinition.isSuitableEdgeMapping(MappingDefinition def);
-  eq ReceiveTokenEndpointDefinition.isSuitableEdgeMapping(MappingDefinition def) = def.getFromType().isByteArray();
-  eq SendTokenEndpointDefinition.isSuitableEdgeMapping(MappingDefinition def) = def.getToType().isByteArray();
 
   // --- isPrimitiveType ---
   syn boolean TokenComponent.isPrimitiveType() = effectiveJavaTypeUse().isPrimitiveType();
@@ -140,13 +128,9 @@ aspect Mappings {
   syn boolean MappingDefinitionType.isArray() = false;
   eq JavaArrayMappingDefinitionType.isArray() = true;
 
-  // --- suitableDefaultMapping ---
-  syn DefaultMappingDefinition EndpointDefinition.suitableDefaultMapping();
-  eq ReceiveTokenEndpointDefinition.suitableDefaultMapping() {
-    String typeName = getMappingList().isEmpty() ?
-        getToken().effectiveJavaTypeUse().getName() :
-        getMappingList().get(0).getFromType().prettyPrint();
-    switch(typeName) {
+  // --- suitableReceiveDefaultMapping ---
+  syn DefaultMappingDefinition EndpointDefinition.suitableReceiveDefaultMapping() {
+    switch (targetTypeName()) {
       case "int":
       case "Integer": return ragconnect().defaultBytesToIntMapping();
       case "short":
@@ -163,11 +147,9 @@ aspect Mappings {
       default: return null;
     }
   }
-  eq SendTokenEndpointDefinition.suitableDefaultMapping() {
-    String typeName = getMappingList().isEmpty() ?
-        getToken().effectiveJavaTypeUse().getName() :
-        getMappingList().get(getMappingList().size() - 1).getFromType().prettyPrint();
-    switch(typeName) {
+  // --- suitableSendDefaultMapping ---
+  syn DefaultMappingDefinition EndpointDefinition.suitableSendDefaultMapping() {
+    switch (targetTypeName()) {
       case "int":
       case "Integer": return ragconnect().defaultIntToBytesMapping();
       case "short":
@@ -184,6 +166,26 @@ aspect Mappings {
       default: return null;
     }
   }
+
+  // --- targetTypeName ---
+  syn String EndpointDefinition.targetTypeName();
+  eq ReceiveTokenEndpointDefinition.targetTypeName() {
+    return getMappingList().isEmpty() ?
+           getToken().effectiveJavaTypeUse().getName() :
+           getMappingList().get(0).getFromType().prettyPrint();
+  }
+  eq ReceiveTypeEndpointDefinition.targetTypeName() {
+    return getMappingList().get(0).getFromType().prettyPrint();
+  }
+  eq SendTokenEndpointDefinition.targetTypeName() {
+    return getMappingList().isEmpty() ?
+           getToken().effectiveJavaTypeUse().getName() :
+           getMappingList().get(getMappingList().size() - 1).getToType().prettyPrint();
+  }
+  eq SendTypeEndpointDefinition.targetTypeName() {
+    return getMappingList().get(getMappingList().size() - 1).getToType().prettyPrint();
+  }
+
 //  eq ReceiveFromRestDefinition.suitableDefaultMapping() {
 //    String typeName = getMappingList().isEmpty() ?
 //        getToken().getJavaTypeUse().getName() :

ragconnect.base/src/main/jastadd/intermediate/MustacheNodes.relast

-MRagConnect ::= ReceiveDefinition:MReceiveDefinition* SendDefinition:MSendDefinition* MappingDefinition:MMappingDefinition* DependencyDefinition:MDependencyDefinition* RootTypeComponent:MTypeComponent* TokenComponent:MTokenComponent* Handler:MHandler*;
+MRagConnect ::= TokenReceiveDefinition:MTokenReceiveDefinition* TokenSendDefinition:MTokenSendDefinition* TypeReceiveDefinition:MTypeReceiveDefinition* TypeSendDefinition:MTypeSendDefinition* MappingDefinition:MMappingDefinition* DependencyDefinition:MDependencyDefinition* RootTypeComponent:MTypeComponent* TokenComponent:MTokenComponent* Handler:MHandler*;
+
 abstract MEndpointDefinition ::= InnerMappingDefinition:MInnerMappingDefinition*;
-MReceiveDefinition : MEndpointDefinition;
-MSendDefinition : MEndpointDefinition;
+abstract MTokenEndpointDefinition : MEndpointDefinition;
+MTokenReceiveDefinition : MTokenEndpointDefinition;
+MTokenSendDefinition : MTokenEndpointDefinition;
+abstract MTypeEndpointDefinition : MEndpointDefinition;
+MTypeReceiveDefinition : MTypeEndpointDefinition;
+MTypeSendDefinition : MTypeEndpointDefinition;
+
 MMappingDefinition;
 MInnerMappingDefinition;
 MDependencyDefinition;
@@ -11,8 +17,10 @@ MHandler ::= <ClassName> <Construction> <AttributeName> <FieldName> <InUse:boole
 
 rel MRagConnect.RagConnect -> RagConnect;
 rel MInnerMappingDefinition.MMappingDefinition -> MMappingDefinition;
-rel MReceiveDefinition.ReceiveTokenEndpointDefinition -> ReceiveTokenEndpointDefinition;
-rel MSendDefinition.SendTokenEndpointDefinition -> SendTokenEndpointDefinition;
+rel MTokenReceiveDefinition.ReceiveTokenEndpointDefinition -> ReceiveTokenEndpointDefinition;
+rel MTokenSendDefinition.SendTokenEndpointDefinition -> SendTokenEndpointDefinition;
+rel MTypeReceiveDefinition.ReceiveTypeEndpointDefinition -> ReceiveTypeEndpointDefinition;
+rel MTypeSendDefinition.SendTypeEndpointDefinition -> SendTypeEndpointDefinition;
 rel MMappingDefinition.MappingDefinition -> MappingDefinition;
 rel MDependencyDefinition.DependencyDefinition -> DependencyDefinition;
 rel MTypeComponent.TypeComponent -> TypeComponent;

ragconnect.base/src/main/jastadd/intermediate2mustache/MustacheNodesToYAML.jrag

@@ -25,19 +25,33 @@ aspect MustacheNodesToYAML {
     root.put("restHandlerField", restHandlerField());
     root.put("restHandlerAttribute", restHandlerAttribute());
 
-    // ReceiveDefinitions
+    // TokenReceiveDefinitions
     ListElement receiveDefinitions = new ListElement();
-    for (MReceiveDefinition def : getReceiveDefinitionList()) {
+    for (MTokenReceiveDefinition def : getTokenReceiveDefinitionList()) {
       receiveDefinitions.addElement(def.toYAML());
     }
-    root.put("ReceiveDefinitions", receiveDefinitions);
+    root.put("TokenReceiveDefinitions", receiveDefinitions);
 
-    // SendDefinitions
+    // TokenSendDefinitions
     ListElement sendDefinitions = new ListElement();
-    for (MSendDefinition def : getSendDefinitionList()) {
+    for (MTokenSendDefinition def : getTokenSendDefinitionList()) {
       sendDefinitions.addElement(def.toYAML());
     }
-    root.put("SendDefinitions", sendDefinitions);
+    root.put("TokenSendDefinitions", sendDefinitions);
+
+    // TypeReceiveDefinitions
+    ListElement typeReceiveDefinitions = new ListElement();
+    for (MTypeReceiveDefinition def : getTypeReceiveDefinitionList()) {
+      typeReceiveDefinitions.addElement(def.toYAML());
+    }
+    root.put("TypeReceiveDefinitions", typeReceiveDefinitions);
+
+    // TypeSendDefinitions
+    ListElement typeSendDefinitions = new ListElement();
+    for (MTypeSendDefinition def : getTypeSendDefinitionList()) {
+      typeSendDefinitions.addElement(def.toYAML());
+    }
+    root.put("TypeSendDefinitions", typeSendDefinitions);
 
     // MappingDefinitions
     ListElement mappingDefinitions = new ListElement();
@@ -88,13 +102,30 @@ aspect MustacheNodesToYAML {
     return result;
   }
 
-  syn MappingElement MReceiveDefinition.toYAML() {
+  syn MappingElement MTokenReceiveDefinition.toYAML() {
+    MappingElement result = super.toYAML();
+    result.put("loggingEnabledForReads", loggingEnabledForReads);
+    return result;
+  }
+
+  syn MappingElement MTokenSendDefinition.toYAML() {
+    MappingElement result = super.toYAML();
+    result.put("sender", sender());
+    result.put("lastValue", lastValue());
+    result.put("loggingEnabledForWrites", loggingEnabledForWrites);
+    result.put("updateMethod", updateMethod());
+    result.put("writeMethod", writeMethod());
+    result.put("tokenResetMethod", tokenResetMethod());
+    return result;
+  }
+
+  syn MappingElement MTypeReceiveDefinition.toYAML() {
     MappingElement result = super.toYAML();
     result.put("loggingEnabledForReads", loggingEnabledForReads);
     return result;
   }
 
-  syn MappingElement MSendDefinition.toYAML() {
+  syn MappingElement MTypeSendDefinition.toYAML() {
     MappingElement result = super.toYAML();
     result.put("sender", sender());
     result.put("lastValue", lastValue());

ragconnect.base/src/main/jastadd/parser/RagConnect.parser

@@ -33,12 +33,18 @@ EndpointDefinition endpoint_definition
 EndpointDefinition endpoint_definition_type
   = RECEIVE token_ref           {: return new ReceiveTokenEndpointDefinition().setToken(token_ref); :}
   | SEND token_ref              {: return new SendTokenEndpointDefinition().setToken(token_ref); :}
+  | RECEIVE TREE type_ref       {: return new ReceiveTypeEndpointDefinition().setType(type_ref); :}
+  | SEND TREE type_ref          {: return new SendTypeEndpointDefinition().setType(type_ref); :}
 ;
 
 TokenComponent token_ref
   = ID.type_name DOT ID.token_name  {: return TokenComponent.createRef(type_name + "." + token_name); :}
 ;
 
+TypeComponent type_ref
+  = ID.parent_type_name DOT ID.child_type_name  {: return TypeComponent.createRef(parent_type_name + "." + child_type_name); :}
+;
+
 ArrayList string_list
   = ID
   | string_list COMMA ID

ragconnect.base/src/main/jastadd/scanner/Keywords.flex

@@ -5,3 +5,4 @@
 "maps"       { return sym(Terminals.MAPS); }
 "to"         { return sym(Terminals.TO); }
 "as"         { return sym(Terminals.AS); }
+"tree"       { return sym(Terminals.TREE); }

ragconnect.base/src/main/java/org/jastadd/ragconnect/compiler/Compiler.java

@@ -223,6 +223,9 @@ public class Compiler extends AbstractCompiler {
     ragConnect.additionalRelations().forEach(ragConnectGrammarPart::addDeclaration);
     ASTNode.loggingEnabledForReads = optionLogReads.value();
     ASTNode.loggingEnabledForWrites = optionLogWrites.value();
+    // reuse "--incremental" option of JastAdd
+    ASTNode.incrementalOptionActive = getConfiguration().incremental() && getConfiguration().traceFlush();
+    printMessage("ASTNode.incrementalOptionActive = " + ASTNode.incrementalOptionActive);
     ASTNode.usesMqtt = optionProtocols.hasValue(OPTION_PROTOCOL_MQTT);
     ASTNode.usesRest = optionProtocols.hasValue(OPTION_PROTOCOL_REST);
     return ragConnect;

ragconnect.base/src/main/resources/MqttHandler.jadd

 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.concurrent.TimeUnit;
 
 aspect MqttHandler {
@@ -160,9 +161,9 @@ public class MqttHandler {
                             org.fusesource.mqtt.client.Callback<org.fusesource.mqtt.client.Callback<Void>> ack) {
         // this method is called, whenever a MQTT message is received
         String topicString = topic.toString();
-        java.util.List<java.util.function.Consumer<byte[]>> callbackList = callbacks.get(topicString);
+        java.util.List<java.util.function.Consumer<byte[]>> callbackList = new java.util.ArrayList<>(callbacks.get(topicString));
         if (callbackList == null || callbackList.isEmpty()) {
-          logger.debug("Got a message, but no callback to call. Forgot to subscribe?");
+          logger.debug("Got a message at {}, but no callback to call. Forgot to subscribe?", topic);
         } else {
           byte[] message = body.toByteArray();
           for (java.util.function.Consumer<byte[]> callback : callbackList) {
@@ -247,7 +248,7 @@ public class MqttHandler {
     }
     // register callback
     logger.debug("new connection for {}", topic);
-    if (callbacks.get(topic) == null) {
+    if (callbacks.get(topic) == null || callbacks.get(topic).isEmpty()) {
       callbacks.put(topic, new java.util.ArrayList<>());
 
       // subscribe at broker

ragconnect.base/src/main/resources/ragconnect.mustache

 {{#usesMqtt}}{{> mqtt}}{{/usesMqtt}}
 {{> handler}}
-aspect ROS2RAG {
-  {{#ReceiveDefinitions}}
+aspect RagConnect {
+  {{#TokenReceiveDefinitions}}
   {{> receiveDefinition}}
-  {{/ReceiveDefinitions}}
+  {{/TokenReceiveDefinitions}}
 
-  {{#SendDefinitions}}
+  {{#TokenSendDefinitions}}
   {{> sendDefinition}}
-  {{/SendDefinitions}}
+  {{/TokenSendDefinitions}}
+
+  {{#TypeReceiveDefinitions}}
+  {{> receiveDefinition}}
+  {{/TypeReceiveDefinitions}}
+
+  {{#TypeSendDefinitions}}
+  {{> sendDefinition}}
+  {{/TypeSendDefinitions}}
 
   {{#MappingDefinitions}}
   {{> mappingDefinition}}
@@ -20,4 +28,75 @@ aspect ROS2RAG {
   {{#TokenComponents}}
   {{> tokenComponent}}
   {{/TokenComponents}}
+  public void {{rootNodeName}}.ragconnectCheckIncremental() {
+  {{#incrementalOptionActive}}
+    // check if --tracing is active
+    trace().getReceiver();
+    // check if tracing of INC_FLUSH_ATTR is possible, i.e., if --tracing=flush
+    ASTState.Trace.Event checkTracing = ASTState.Trace.Event.INC_FLUSH_ATTR;
+    // check if --rewrite is active
+    mayHaveRewrite();
+    // check if --incremental is active
+    Object checkIncremental = inc_throwAway_visited;
+  {{/incrementalOptionActive}}
+  }
+}
+
+{{#incrementalOptionActive}}
+aspect RagConnectObserver {
+  class RagConnectObserver implements ASTState.Trace.Receiver {
+    ASTState.Trace.Receiver oldReceiver;
+    class RagConnectObserverEntry {
+      final ConnectToken connectToken;
+      final ASTNode node;
+      final String attributeString;
+      final Runnable attributeCall;
+      RagConnectObserverEntry(ConnectToken connectToken, ASTNode node, String attributeString, Runnable attributeCall) {
+        this.connectToken = connectToken;
+        this.node = node;
+        this.attributeString = attributeString;
+        this.attributeCall = attributeCall;
+      }
+    }
+    java.util.List<RagConnectObserverEntry> observedNodes = new java.util.ArrayList<>();
+    RagConnectObserver(ASTNode node) {
+      // set the receiver. potentially dangerous because overriding existing receiver!
+      oldReceiver = node.trace().getReceiver();
+      node.trace().setReceiver(this);
+    }
+    void add(ConnectToken connectToken, ASTNode node, String attributeString, Runnable attributeCall) {
+      System.out.println("** observer add " + node + " on " + attributeString);
+      observedNodes.add(new RagConnectObserverEntry(connectToken, node, attributeString, attributeCall));
+    }
+    void remove(ConnectToken connectToken) {
+      observedNodes.removeIf(entry -> entry.connectToken.equals(connectToken));
+    }
+    @Override
+    public void accept(ASTState.Trace.Event event, ASTNode node, String attribute, Object params, Object value) {
+      oldReceiver.accept(event, node, attribute, params, value);
+      // ignore all events but INC_FLUSH_ATTR
+      if (event != ASTState.Trace.Event.INC_FLUSH_ATTR) {
+        return;
+      }
+      System.out.println("** observer check INC_FLUSH_ATTR event");
+      // iterate through list, if matching pair. could maybe be more efficient.
+      for (RagConnectObserverEntry entry : observedNodes) {
+        if (entry.node.equals(node) && entry.attributeString.equals(attribute)) {
+          // hit. call the attribute/nta-token
+          System.out.println("** observer hit " + entry.node + " on " + entry.attributeString);
+          entry.attributeCall.run();
+        }
+      }
+    }
+  }
+
+  private static RagConnectObserver ASTNode._ragConnectObserverInstance;
+  RagConnectObserver ASTNode._ragConnectObserver() {
+    if (_ragConnectObserverInstance == null) {
+      // does not matter, which node is used to create the observer as ASTState/tracing is also static
+      _ragConnectObserverInstance = new RagConnectObserver(this);
+    }
+    return _ragConnectObserverInstance;
+  }
 }
+{{/incrementalOptionActive}}

ragconnect.base/src/main/resources/sendDefinition.mustache

@@ -3,6 +3,12 @@ private byte[] {{parentTypeName}}.{{lastValue}} = null;
 
 public boolean {{parentTypeName}}.{{connectMethod}}(String {{connectParameterName}}, boolean writeCurrentValue) throws java.io.IOException {
   {{>handleUri}}
+  ConnectToken connectToken;
+  if (connectTokens.computeIfAbsent(this, astNode -> new java.util.HashMap<java.net.URI, ConnectToken>())
+                   .get(uri) != null) {
+    System.err.println("Already connected for " + uri + " on " + this + "!");
+    return true;
+  }
   switch (scheme) {
   {{#usesMqtt}}
     case "mqtt":
@@ -18,30 +24,45 @@ public boolean {{parentTypeName}}.{{connectMethod}}(String {{connectParameterNam
       if (writeCurrentValue) {
         {{writeMethod}}();
       }
+      connectToken = new ConnectToken(uri);
       break;
   {{/usesMqtt}}
   {{#usesRest}}
     case "rest":
-      ConnectToken connectToken = {{restHandlerAttribute}}().newGETConnection(uri, () -> {
+      connectToken = {{restHandlerAttribute}}().newGETConnection(uri, () -> {
         {{updateMethod}}();
         return new String({{lastValue}});
       });
       if (connectToken == null) {
         return false;
       }
-      connectTokens.computeIfAbsent(this, astNode -> new java.util.HashMap<java.net.URI, ConnectToken>())
-                   .put(uri, connectToken);
       break;
   {{/usesRest}}
     default:
       System.err.println("Unknown protocol '" + scheme + "'.");
       return false;
   }
+  connectTokens.computeIfAbsent(this, astNode -> new java.util.HashMap<java.net.URI, ConnectToken>())
+               .put(uri, connectToken);
+  {{#incrementalOptionActive}}
+  _ragConnectObserver().add(connectToken, this, "{{parentTypeName}}.get{{tokenName}}()", () -> {
+    if (this.{{updateMethod}}()) {
+      this.{{writeMethod}}();
+    }
+  });
+  {{/incrementalOptionActive}}
   return true;
 }
 
 public boolean {{parentTypeName}}.{{disconnectMethod}}(String {{connectParameterName}}) throws java.io.IOException {
   {{>handleUri}}
+  ConnectToken connectToken = connectTokens.get(this).remove(uri);
+  if (connectToken == null) {
+    System.err.println("Disconnect without connect for " + uri + " on " + this + "!");
+  }
+  {{#incrementalOptionActive}}
+  _ragConnectObserver().remove(connectToken);
+  {{/incrementalOptionActive}}
   switch (scheme) {
   {{#usesMqtt}}
     case "mqtt":
@@ -51,7 +72,7 @@ public boolean {{parentTypeName}}.{{disconnectMethod}}(String {{connectParameter
   {{/usesMqtt}}
   {{#usesRest}}
     case "rest":
-      {{restHandlerAttribute}}().disconnect(connectTokens.get(this).get(uri));
+      {{restHandlerAttribute}}().disconnect(connectToken);
       break;
   {{/usesRest}}
     default: