code: /*
   * 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.skywalking.oal.rt.parser;
  
  import java.util.ArrayList;
  import java.util.List;
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.skywalking.oal.rt.util.ClassMethodUtil;
  import org.apache.skywalking.oal.rt.util.TypeCastUtil;
  
  @Getter
  @Setter
  public class EntryMethod {
      static final int LITERAL_TYPE = 1;
      static final int ATTRIBUTE_EXP_TYPE = 2;
      static final int EXPRESSION_TYPE = 3;
  
      private String methodName;
      private List<Integer> argTypes = new ArrayList<>();
      private List<Object> argsExpressions = new ArrayList<>();
  
      void addArg(Class<?> parameterType, Argument arg) {
          if (arg.getType() == LITERAL_TYPE) {
              // As literal type, there is always one element.
              addArg(parameterType, arg.getType(), arg.getText().get(0));
              return;
          }
          addArg(parameterType, arg.getType(), parameterType.equals(boolean.class) ?
              TypeCastUtil.withCast(arg.getCastType(), "source." + ClassMethodUtil.toIsMethod(arg.getText()))
              :
              TypeCastUtil.withCast(arg.getCastType(), "source." + ClassMethodUtil.toGetMethod(arg.getText())));
      }
  
      void addArg(Class<?> parameterType, String expression) {
          addArg(parameterType, LITERAL_TYPE, expression);
      }
  
      void addArg(Expression expression) {
          argTypes.add(EXPRESSION_TYPE);
          argsExpressions.add(expression);
      }
  
      private void addArg(Class<?> parameterType, int type, String expression) {
          if (parameterType.equals(int.class)) {
              expression = "(int)(" + expression + ")";
          } else if (parameterType.equals(long.class)) {
              expression = "(long)(" + expression + ")";
          } else if (parameterType.equals(double.class)) {
              expression = "(double)(" + expression + ")";
          } else if (parameterType.equals(float.class)) {
              expression = "(float)(" + expression + ")";
          }
          argTypes.add(type);
          argsExpressions.add(expression);
      }
  }
  