content: package act.sys.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.asm.*;
  import act.sys.Env;
  import org.osgl.util.S;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Scan `@Env.Mode`, `@Env.Profile`, `@Env.Group`
   */
  public class EnvAnnotationVisitor extends AnnotationVisitor implements Opcodes {
  
      public static final String DESC_PROFILE = Type.getType(Env.Profile.class).getDescriptor();
      public static final String DESC_REQUIRE_PROFILE = Type.getType(Env.RequireProfile.class).getDescriptor();
      public static final String DESC_MODE = Type.getType(Env.Mode.class).getDescriptor();
      public static final String DESC_REQUIRE_MODE = Type.getType(Env.RequireMode.class).getDescriptor();
      public static final String DESC_GROUP = Type.getType(Env.Group.class).getDescriptor();
      public static final String DESC_REQUIRE_GROUP = Type.getType(Env.RequireGroup.class).getDescriptor();
  
      private List<String> arrayValue = new ArrayList<>();
      private boolean matched = true;
      private boolean except = false;
      private String desc;
  
      public EnvAnnotationVisitor(AnnotationVisitor annotationVisitor, String descriptor) {
          super(ASM5, annotationVisitor);
          this.desc = descriptor;
      }
  
      @Override
      public void visit(String name, Object value) {
          if ("value".equals(name)) {
              String s = S.string(value);
              if (S.eq(desc, DESC_REQUIRE_MODE) || S.eq(desc, DESC_MODE)) {
                  matched = Env.modeMatches(s);
              }
          } else if ("except".equals(name)) {
              except = (Boolean) value;
          }
          super.visit(name, value);
      }
  
      @Override
      public AnnotationVisitor visitArray(String name) {
          AnnotationVisitor av = super.visitArray(name);
          if ("value".equals(name)) {
              return new AnnotationVisitor(ASM5, av) {
                  @Override
                  public void visit(String name, Object value) {
                      arrayValue.add(S.string(value));
                      super.visit(name, value);
                  }
              };
          }
          return av;
      }
  
      @Override
      public void visitEnum(String name, String desc, String value) {
          if ("value".equals(name) && desc.contains("Mode")) {
              Act.Mode mode = Act.Mode.valueOf(value);
              if (!Env.modeMatches(mode)) {
                  matched = false;
              }
          }
          super.visitEnum(name, desc, value);
      }
  
      @Override
      public void visitEnd() {
          int arrayValueSize = arrayValue.size();
          if (arrayValueSize > 0) {
              if (S.eq(desc, DESC_REQUIRE_PROFILE) || S.eq(desc, DESC_PROFILE)) {
                  matched = Env.profileMatches(arrayValue.toArray(new String[arrayValueSize]));
              } else if (S.eq(desc, DESC_REQUIRE_GROUP) || S.eq(desc, DESC_GROUP)) {
                  matched = Env.groupMatches(arrayValue.toArray(new String[arrayValueSize]));
              }
          }
          matched = except ^ matched;
          super.visitEnd();
      }
  
      public boolean matched() {
          return matched;
      }
  
  }
  