/*
    * 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.maven.tools.plugin.extractor.annotations.scanner.visitors;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.tools.plugin.extractor.annotations.scanner.MojoAnnotationsScanner;
  import org.objectweb.asm.AnnotationVisitor;
  import org.objectweb.asm.MethodVisitor;
  import org.objectweb.asm.Opcodes;
  import org.objectweb.asm.Type;
  
  /**
   * Method visitor.
   *
   * @author Slawomir Jaranowski
   */
  public class MojoMethodVisitor extends MethodVisitor implements MojoParameterVisitor {
      private final String className;
      private final String fieldName;
      private final List<String> typeParameters;
      private Map<String, MojoAnnotationVisitor> annotationVisitorMap = new HashMap<>();
  
      public MojoMethodVisitor(String fieldName, String className, List<String> typeParameters) {
          super(Opcodes.ASM9);
          this.fieldName = fieldName;
          this.className = className;
          this.typeParameters = typeParameters;
      }
  
      @Override
      public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
          String annotationClassName = Type.getType(desc).getClassName();
          if (!MojoAnnotationsScanner.METHOD_LEVEL_ANNOTATIONS.contains(annotationClassName)) {
              return null;
          }
  
          MojoAnnotationVisitor mojoAnnotationVisitor = new MojoAnnotationVisitor(annotationClassName);
          annotationVisitorMap.put(annotationClassName, mojoAnnotationVisitor);
          return mojoAnnotationVisitor;
      }
  
      @Override
      public String getFieldName() {
          return fieldName;
      }
  
      @Override
      public String getClassName() {
          return className;
      }
  
      @Override
      public List<String> getTypeParameters() {
          return typeParameters;
      }
  
      @Override
      public Map<String, MojoAnnotationVisitor> getAnnotationVisitorMap() {
          return annotationVisitorMap;
      }
  
      @Override
      public boolean isAnnotationOnMethod() {
          return true;
      }
  }