content: package act.job.meta;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed 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.
   * #L%
   */
  
  import act.Act;
  import act.app.App;
  import act.app.event.SysEventId;
  import act.asm.Type;
  import act.event.meta.SimpleEventListenerMetaInfo;
  import act.sys.meta.InvokeType;
  import act.sys.meta.ReturnTypeInfo;
  import act.util.*;
  import org.osgl.$;
  import org.osgl.inject.BeanSpec;
  import org.osgl.util.E;
  import org.osgl.util.S;
  
  import java.lang.reflect.Method;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.atomic.AtomicInteger;
  
  public class JobMethodMetaInfo extends LogSupportedDestroyableBase {
  
      private static final AtomicInteger jobIdCounter = new AtomicInteger(0);
  
      private String id;
      private String name;
      private App app;
      private InvokeType invokeType;
      private JobClassMetaInfo clsInfo;
      private ReturnTypeInfo returnType = new ReturnTypeInfo();
      private List<BeanSpec> paramTypes;
      private Method method;
  
      public JobMethodMetaInfo(final JobClassMetaInfo clsInfo, final List<String> paramTypes) {
          this.clsInfo = clsInfo;
          app = Act.app();
          app.jobManager().on(SysEventId.DEPENDENCY_INJECTOR_PROVISIONED, "JobMethodMetaInfo:init-" + jobIdCounter.getAndIncrement(), new Runnable() {
              @Override
              public void run() {
                  $.Var<Method> var = $.var();
                  JobMethodMetaInfo.this.paramTypes = SimpleEventListenerMetaInfo.convert(paramTypes, clsInfo.className(), name, var);
                  JobMethodMetaInfo.this.method = var.get();
  
              }
          });
      }
  
      private JobMethodMetaInfo(final JobClassMetaInfo clsInfo, JobMethodMetaInfo parent) {
          this.app = parent.app;
          this.clsInfo = clsInfo;
          this.paramTypes = parent.paramTypes;
      }
  
      @Override
      protected void releaseResources() {
          app = null;
          clsInfo.destroy();
          super.releaseResources();
      }
  
      public JobClassMetaInfo classInfo() {
          return clsInfo;
      }
  
      public JobMethodMetaInfo name(String name) {
          this.name = name;
          return this;
      }
  
      public String name() {
          return name;
      }
  
      public String fullName() {
          return S.concat(clsInfo.className(), ".", name());
      }
  
      public JobMethodMetaInfo id(String id) {
          this.id = id;
          return this;
      }
  
      public String id() {
          return S.blank(id) ? fullName() : id;
      }
  
      public Method method() {
          if (null == method) {
              Class<?> c = app.classForName(classInfo().className());
              if (null == paramTypes() || paramTypes().isEmpty()) {
                  method = $.getMethod(c, name());
              } else {
                  throw new IllegalStateException("method cannot have parameters for Job invoked before app fully loaded");
              }
          }
          return method;
      }
  
      public JobMethodMetaInfo invokeStaticMethod() {
          invokeType = InvokeType.STATIC;
          return this;
      }
  
      public JobMethodMetaInfo invokeInstanceMethod() {
          invokeType = InvokeType.VIRTUAL;
          return this;
      }
  
      public boolean isStatic() {
          return InvokeType.STATIC == invokeType;
      }
  
      public JobMethodMetaInfo returnType(Type type) {
          returnType = ReturnTypeInfo.of(type);
          return this;
      }
  
      public Type returnType() {
          return returnType.type();
      }
  
      public List<BeanSpec> paramTypes() {
          return paramTypes;
      }
  
      @Override
      public int hashCode() {
          return $.hc(fullName());
      }
  
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (obj instanceof JobMethodMetaInfo) {
              JobMethodMetaInfo that = (JobMethodMetaInfo) obj;
              return $.eq(that.fullName(), fullName());
          }
          return false;
      }
  
      @Override
      public String toString() {
          S.Buffer sb = S.newBuffer();
          sb.append(_invokeType())
                  .append(_return())
                  .append(fullName());
          return sb.toString();
      }
  
      public List<JobMethodMetaInfo> extendedJobMethodMetaInfoList(App app) {
          E.illegalStateIf(!classInfo().isAbstract(), "this job method meta info is not abstract");
          final List<JobMethodMetaInfo> list = new ArrayList<>();
          final JobClassMetaInfo clsInfo = classInfo();
          String clsName = clsInfo.className();
          ClassNode node = app.classLoader().classInfoRepository().node(clsName);
          if (null == node) {
              return list;
          }
          final JobMethodMetaInfo me = this;
          node.visitTree(new $.Visitor<ClassNode>() {
              @Override
              public void visit(ClassNode classNode) throws $.Break {
                  if (!classNode.isAbstract() && classNode.isPublic()) {
                      JobClassMetaInfo subClsInfo = new JobClassMetaInfo().className(classNode.name());
                      JobMethodMetaInfo subMethodInfo = new JobMethodMetaInfo(subClsInfo, JobMethodMetaInfo.this);
                      if (me.isStatic()) {
                          subMethodInfo.invokeStaticMethod();
                      } else {
                          subMethodInfo.invokeInstanceMethod();
                      }
                      subMethodInfo.name(me.name());
                      subMethodInfo.returnType(me.returnType());
                      list.add(subMethodInfo);
                  }
              }
          });
          return list;
      }
  
      private String _invokeType() {
          if (null == invokeType) {
              return "";
          }
          switch (invokeType) {
              case VIRTUAL:
                  return "";
              case STATIC:
                  return "static ";
              default:
                  assert false;
                  return "";
          }
      }
  
      private String _return() {
          if (null == returnType) {
              return " ";
          }
          if (returnType.hasReturn()) {
              return returnType.type().getClassName() + " ";
          } else {
              return "";
          }
      }
  
  }
  