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.calcite.linq4j.tree;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.lang.reflect.Modifier;
  import java.lang.reflect.Type;
  import java.util.List;
  import java.util.Objects;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Declaration of a class.
   */
  public class ClassDeclaration extends MemberDeclaration {
    public final int modifier;
    public final String classClass = "class";
    public final String name;
    public final List<MemberDeclaration> memberDeclarations;
    public final @Nullable Type extended;
    public final List<Type> implemented;
  
    public ClassDeclaration(int modifier, String name, @Nullable Type extended,
        List<Type> implemented, List<MemberDeclaration> memberDeclarations) {
      this.modifier = modifier;
      this.name = requireNonNull(name, "name");
      this.memberDeclarations = memberDeclarations;
      this.extended = extended;
      this.implemented = implemented;
    }
  
    @Override public void accept(ExpressionWriter writer) {
      String modifiers = Modifier.toString(modifier);
      writer.append(modifiers);
      if (!modifiers.isEmpty()) {
        writer.append(' ');
      }
      writer.append(classClass).append(' ').append(name);
      if (extended != null) {
        writer.append(" extends ").append(extended);
      }
      if (!implemented.isEmpty()) {
        writer.list(" implements ", ", ", "", implemented);
      }
      writer.list(" {\n", "", "}", memberDeclarations);
      writer.newlineAndIndent();
    }
  
    @Override public ClassDeclaration accept(Shuttle shuttle) {
      shuttle = shuttle.preVisit(this);
      final List<MemberDeclaration> members1 =
          Expressions.acceptMemberDeclarations(memberDeclarations, shuttle);
      return shuttle.visit(this, members1);
    }
  
    @Override public <R> R accept(Visitor<R> visitor) {
      return visitor.visit(this);
    }
  
    @Override public boolean equals(@Nullable Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
  
      ClassDeclaration that = (ClassDeclaration) o;
  
      if (modifier != that.modifier) {
        return false;
      }
      if (!classClass.equals(that.classClass)) {
        return false;
      }
      return Objects.equals(extended, that.extended)
          && implemented.equals(that.implemented)
          && memberDeclarations.equals(that.memberDeclarations)
          && name.equals(that.name);
    }
  
    @Override public int hashCode() {
      return Objects.hash(modifier, classClass, name, memberDeclarations,
          extended, implemented);
    }
  }
  