content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.camel.quarkus.dsl.java.joor.deployment;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  import io.quarkus.deployment.annotations.BuildProducer;
  import io.quarkus.deployment.annotations.BuildStep;
  import io.quarkus.deployment.annotations.ExecutionTime;
  import io.quarkus.deployment.annotations.Record;
  import io.quarkus.deployment.builditem.FeatureBuildItem;
  import io.quarkus.deployment.builditem.GeneratedClassBuildItem;
  import io.quarkus.deployment.builditem.nativeimage.LambdaCapturingTypeBuildItem;
  import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
  import io.quarkus.deployment.pkg.builditem.CurateOutcomeBuildItem;
  import io.quarkus.deployment.pkg.steps.NativeOrNativeSourcesBuild;
  import io.quarkus.maven.dependency.ResolvedDependency;
  import io.quarkus.paths.PathCollection;
  import io.quarkus.runtime.RuntimeValue;
  import io.quarkus.runtime.annotations.RegisterForReflection;
  import org.apache.camel.CamelContext;
  import org.apache.camel.RoutesBuilder;
  import org.apache.camel.dsl.java.joor.Helper;
  import org.apache.camel.language.joor.CompilationUnit;
  import org.apache.camel.language.joor.MultiCompile;
  import org.apache.camel.quarkus.core.deployment.main.CamelMainHelper;
  import org.apache.camel.quarkus.core.deployment.spi.CamelContextBuildItem;
  import org.apache.camel.quarkus.dsl.java.joor.runtime.JavaJoorDslRecorder;
  import org.apache.camel.spi.Resource;
  import org.apache.camel.util.IOHelper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class JavaJoorDslProcessor {
  
      private static final Logger LOG = LoggerFactory.getLogger(JavaJoorDslProcessor.class);
      private static final String FEATURE = "camel-java-joor-dsl";
  
      @BuildStep
      FeatureBuildItem feature() {
          return new FeatureBuildItem(FEATURE);
      }
  
      @BuildStep(onlyIf = NativeOrNativeSourcesBuild.class)
      void compileClassesAOT(BuildProducer<JavaJoorGeneratedClassBuildItem> generatedClass,
              BuildProducer<ReflectiveClassBuildItem> reflectiveClass,
              BuildProducer<LambdaCapturingTypeBuildItem> lambdaCapturingTypeProducer,
              CurateOutcomeBuildItem curateOutcomeBuildItem) throws Exception {
          Map<String, Resource> nameToResource = new HashMap<>();
          LOG.debug("Loading .java resources");
          CompilationUnit unit = CompilationUnit.input();
          CamelMainHelper.forEachMatchingResource(
                  resource -> {
                      if (!resource.getLocation().endsWith(".java")) {
                          return;
                      }
                      try (InputStream is = resource.getInputStream()) {
                          String content = IOHelper.loadText(is);
                          String name = Helper.determineName(resource, content);
                          unit.addClass(name, content);
                          nameToResource.put(name, resource);
                      } catch (IOException e) {
                          throw new RuntimeException(e);
                      }
                  });
          if (nameToResource.isEmpty()) {
              return;
          }
          LOG.debug("Compiling unit: {}", unit);
          CompilationUnit.Result result = MultiCompile.compileUnit(
                  unit,
                  List.of(
                          "-classpath",
                          curateOutcomeBuildItem.getApplicationModel().getDependencies().stream()
                                  .map(ResolvedDependency::getResolvedPaths)
                                  .flatMap(PathCollection::stream)
                                  .map(Objects::toString)
                                  .collect(Collectors.joining(System.getProperty("path.separator")))));
          for (String className : result.getClassNames()) {
              registerForReflection(reflectiveClass, lambdaCapturingTypeProducer, result.getClass(className));
          }
          for (String className : result.getCompiledClassNames()) {
              int index = className.indexOf("$");
              String outerClassName = index == -1 ? className : className.substring(0, index);
              generatedClass
                      .produce(new JavaJoorGeneratedClassBuildItem(className, nameToResource.get(outerClassName).getLocation(),
                              result.getByteCode(className)));
          }
      }
  
      private void registerForReflection(BuildProducer<ReflectiveClassBuildItem> reflectiveClass,
              BuildProducer<LambdaCapturingTypeBuildItem> lambdaCapturingTypeProducer, Class<?> aClass) {
          RegisterForReflection annotation = aClass.getAnnotation(RegisterForReflection.class);
          if (annotation == null) {
              return;
          }
  
          for (String lambdaCapturingType : annotation.lambdaCapturingTypes()) {
              lambdaCapturingTypeProducer.produce(new LambdaCapturingTypeBuildItem(lambdaCapturingType));
          }
          boolean methods = annotation.methods();
          boolean fields = annotation.fields();
          boolean ignoreNested = annotation.ignoreNested();
          boolean serialization = annotation.serialization();
          boolean unsafeAllocated = annotation.unsafeAllocated();
  
          if (annotation.registerFullHierarchy()) {
              LOG.warn(
                      "The element 'registerFullHierarchy' of the annotation 'RegisterForReflection' is not supported by the extension Camel Java jOOR DSL");
          }
          Class<?>[] targets = annotation.targets();
          String[] classNames = annotation.classNames();
          if (targets.length == 0 && classNames.length == 0) {
              // No target and classname set, the target is then the class itself
              registerClass(aClass, aClass.getName(), methods, fields, ignoreNested, serialization,
                      unsafeAllocated, reflectiveClass);
              return;
          }
  
          for (Class<?> type : targets) {
              registerClass(type, type.getName(), methods, fields, ignoreNested, serialization,
                      unsafeAllocated, reflectiveClass);
          }
  
          for (String className : classNames) {
              registerClass(null, className, methods, fields, ignoreNested, serialization, unsafeAllocated,
                      reflectiveClass);
          }
      }
  
      private void registerClass(Class<?> type, String className, boolean methods, boolean fields, boolean ignoreNested,
              boolean serialization,
              boolean unsafeAllocated, BuildProducer<ReflectiveClassBuildItem> reflectiveClass) {
          reflectiveClass.produce(serialization
                  ? ReflectiveClassBuildItem.builder(className).serialization().unsafeAllocated(unsafeAllocated).build()
                  : ReflectiveClassBuildItem.builder(className).constructors().methods(methods).fields(fields)
                          .unsafeAllocated(unsafeAllocated).build());
  
          if (ignoreNested) {
              return;
          }
  
          try {
              Class<?> aClass = type == null ? Thread.currentThread().getContextClassLoader().loadClass(className) : type;
              for (Class<?> clazz : aClass.getDeclaredClasses()) {
                  registerClass(clazz, clazz.getName(), methods, fields, false, serialization, unsafeAllocated,
                          reflectiveClass);
              }
          } catch (ClassNotFoundException e) {
              LOG.warn("Failed to load Class {}", className, e);
          }
      }
  
      @BuildStep(onlyIf = NativeOrNativeSourcesBuild.class)
      void registerGeneratedClasses(BuildProducer<GeneratedClassBuildItem> generatedClass,
              BuildProducer<ReflectiveClassBuildItem> reflectiveClass,
              List<JavaJoorGeneratedClassBuildItem> classes) {
  
          for (JavaJoorGeneratedClassBuildItem clazz : classes) {
              generatedClass.produce(new GeneratedClassBuildItem(true, clazz.getName(), clazz.getClassData()));
          }
          reflectiveClass.produce(ReflectiveClassBuildItem
                  .builder(classes.stream().map(JavaJoorGeneratedClassBuildItem::getName).toArray(String[]::new)).build());
      }
  
      @BuildStep(onlyIf = NativeOrNativeSourcesBuild.class)
      @Record(value = ExecutionTime.STATIC_INIT)
      void registerRoutesBuilder(List<JavaJoorGeneratedClassBuildItem> classes,
              CamelContextBuildItem context,
              JavaJoorDslRecorder recorder) throws Exception {
          RuntimeValue<CamelContext> camelContext = context.getCamelContext();
          List<RoutesBuilder> builders = new ArrayList<>(classes.size());
          // Register routes first
          for (JavaJoorGeneratedClassBuildItem clazz : classes) {
              builders.add(recorder.registerRoutes(camelContext, clazz.getName(), clazz.getLocation()));
          }
          // Then register templated routes
          for (RoutesBuilder builder : builders) {
              recorder.registerTemplatedRoutes(camelContext, builder);
          }
      }
  }
  