1st attempt to move from xtend to java

renderc/CMakeLists.txt

@@ -82,13 +82,13 @@ add_custom_command(
     ./io.opentelemetry.render/src/io/opentelemetry/render/GenerateRender.mwe2
     ./io.opentelemetry.render/src/io/opentelemetry/render/validation/RenderValidator.xtend
     ./io.opentelemetry.render/src/io/opentelemetry/render/formatting/RenderFormatter.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/AppExtensions.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/SpanExtensions.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/FieldExtensions.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/FieldTypeExtensions.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/MessageExtensions.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/UtilityExtensions.xtend
-    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/XPackedMessageExtensions.xtend
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/AppExtensions.java
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/SpanExtensions.java
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/FieldExtensions.java
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/FieldTypeExtensions.java
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/MessageExtensions.java
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/UtilityExtensions.java
+    ./io.opentelemetry.render/src/io/opentelemetry/render/extensions/XPackedMessageExtensions.java
     ./io.opentelemetry.render/src/io/opentelemetry/render/generator/RenderGenerator.xtend
     ./io.opentelemetry.render/src/io/opentelemetry/render/generator/MetricsGenerator.xtend
     ./io.opentelemetry.render/src/io/opentelemetry/render/generator/AppPacker.xtend

renderc/io.opentelemetry.render/src/io/opentelemetry/render/extensions/AppExtensions.java

@@ -0,0 +1,61 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package io.opentelemetry.render.extensions;
+
+import io.opentelemetry.render.render.App;
+import io.opentelemetry.render.render.Document;
+import io.opentelemetry.render.render.Message;
+import io.opentelemetry.render.render.Metric;
+import io.opentelemetry.render.render.PackageDefinition;
+import io.opentelemetry.render.render.Span;
+import java.util.List;
+import java.util.Set;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.xtext.xbase.lib.Functions.Function1;
+import org.eclipse.xtext.xbase.lib.IterableExtensions;
+
+public class AppExtensions {
+  public static String hashName(final App app) {
+    String name = app.getName();
+    return (name + "_hash");
+  }
+
+  public static String hashFunctor(final App app) {
+    String name = app.getName();
+    return (name + "_hasher_t");
+  }
+
+  public static String hashSize(final App app) {
+    String upperCase = AppExtensions.hashName(app).toUpperCase();
+    return (upperCase + "_SIZE");
+  }
+
+  public static PackageDefinition pkg(final App app) {
+    EObject eContainer = app.eContainer();
+    return ((Document) eContainer).getPackage();
+  }
+
+  public static EList<Metric> metrics(final App app) {
+    EObject eContainer = app.eContainer();
+    return ((Document) eContainer).getMetrics();
+  }
+
+  public static Set<App> remoteApps(final App app) {
+    final Function1<Span, Boolean> function = (Span it) -> {
+      return Boolean.valueOf(it.isIsProxy());
+    };
+    final Function1<Span, App> function1 = (Span it) -> {
+      return it.getRemoteApp();
+    };
+    return IterableExtensions.<App>toSet(IterableExtensions.<Span, App>map(IterableExtensions.<Span>filter(app.getSpans(), function), function1));
+  }
+
+  public static List<Message> messages(final App app) {
+    final Function1<Span, EList<Message>> function = (Span it) -> {
+      return it.getMessages();
+    };
+    return IterableExtensions.<Message>toList(IterableExtensions.<Span, Message>flatMap(app.getSpans(), function));
+  }
+}

renderc/io.opentelemetry.render/src/io/opentelemetry/render/extensions/FieldExtensions.java

@@ -0,0 +1,48 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package io.opentelemetry.render.extensions;
+
+import io.opentelemetry.render.render.Field;
+import io.opentelemetry.render.render.FieldType;
+
+public class FieldExtensions {
+
+  public static int size(final Field field, final boolean packedStrings) {
+    int expression;
+    if (field.isIsArray()) {
+      expression = field.getArray_size();
+    } else {
+      expression = 1;
+    }
+    final int numOfElements = expression;
+    int size = FieldTypeExtensions.size(field.getType(), packedStrings);
+    return (size * numOfElements);
+  }
+
+  public static CharSequence arraySuffix(final Field field) {
+    CharSequence expression = null;
+    if (field.isIsArray()) {
+      StringBuilder builder = new StringBuilder();
+      builder.append("[");
+      int arraySize = field.getArray_size();
+      builder.append(arraySize);
+      builder.append("]");
+      expression = builder;
+    } else {
+      expression = "";
+    }
+    return expression;
+  }
+
+  public static CharSequence cType(final Field field) {
+    FieldType type = field.getType();
+    int expression;
+    if (field.isIsArray()) {
+      expression = field.getArray_size();
+    } else {
+      expression = (-1);
+    }
+    return FieldTypeExtensions.cType(type, expression);
+  }
+}