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.cassandra.inject;
  
  import java.util.Arrays;
  import java.util.stream.Collectors;
  
  /**
   * Refer to <a href="https://github.com/bytemanproject/byteman/blob/master/docs/asciidoc/src/main/asciidoc/chapters/Byteman-Rule-Language.adoc"/>
   * and injections.md files in the root directory.
   */
  public class InvokePointBuilder
  {
      private String invokePoint = "AT ENTRY";
      private String targetClassOrInterface;
      private boolean targetInterface;
      private String targetMethod;
  
      public static InvokePointBuilder newInvokePoint()
      {
          return new InvokePointBuilder();
      }
  
      public InvokePointBuilder onClass(Class<?> targetClass)
      {
          if (targetClass.isInterface())
          {
              return onInterface(targetClass.getName());
          }
          else
          {
              return onClass(targetClass.getName());
          }
      }
  
      public InvokePointBuilder onClass(String targetClass)
      {
          this.targetClassOrInterface = targetClass;
          this.targetInterface = false;
          return this;
      }
  
      public InvokePointBuilder onInterface(String targetInterface)
      {
          this.targetClassOrInterface = targetInterface;
          this.targetInterface = true;
          return this;
      }
  
      public InvokePointBuilder onClass(Class<?> enclosingClass, String targetClass)
      {
          this.targetClassOrInterface = String.format("%s$%s", enclosingClass.getName(), targetClass);
          this.targetInterface = false;
          return this;
      }
  
      public InvokePointBuilder onMethod(String targetMethod, Object... methodArgs)
      {
          if (methodArgs.length > 0)
          {
              targetMethod = targetMethod + Arrays.stream(methodArgs)
                                                  .map(arg -> (arg instanceof Class<?>) ? ((Class<?>) arg).getName() : String.valueOf(arg))
                                                  .collect(Collectors.joining(",", "(", ")"));
          }
          this.targetMethod = targetMethod;
          return this;
      }
  
      public InvokePointBuilder atEntry()
      {
          invokePoint = "AT ENTRY";
          return this;
      }
  
      public InvokePointBuilder atExit()
      {
          invokePoint = "AT EXIT";
          return this;
      }
  
      public InvokePointBuilder at(String atExpression)
      {
          invokePoint = String.format("AT %s", atExpression);
          return this;
      }
  
      public InvokePointBuilder after(String afterExpression)
      {
          invokePoint = String.format("AFTER %s", afterExpression);
          return this;
      }
  
      public InvokePointBuilder atInvoke(String method)
      {
          invokePoint = String.format("AT INVOKE %s", method);
          return this;
      }
  
      public InvokePointBuilder atExceptionExit()
      {
          invokePoint = "AT EXCEPTION EXIT";
          return this;
      }
  
      public String getTargetClassOrInterface()
      {
          return targetClassOrInterface;
      }
  
      String buildInternal()
      {
          return String.format("%s %s\nMETHOD %s\n%s",
                  targetInterface ? "INTERFACE" : "CLASS",
                               targetClassOrInterface,
                               targetMethod,
                               invokePoint);
      }
  }
  