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.Iterator;
  import java.util.List;
  import java.util.Objects;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Declaration of a constructor.
   */
  public class ConstructorDeclaration extends MemberDeclaration {
    public final int modifier;
    public final Type resultType;
    public final List<ParameterExpression> parameters;
    public final BlockStatement body;
    /** Cached hash code for the expression. */
    private int hash;
  
    public ConstructorDeclaration(int modifier, Type declaredAgainst,
        List<ParameterExpression> parameters, BlockStatement body) {
      this.modifier = modifier;
      this.resultType = requireNonNull(declaredAgainst, "declaredAgainst");
      this.parameters = requireNonNull(parameters, "parameters");
      this.body = requireNonNull(body, "body");
    }
  
    @Override public MemberDeclaration accept(Shuttle shuttle) {
      shuttle = shuttle.preVisit(this);
      // do not visit parameters
      final BlockStatement body = this.body.accept(shuttle);
      return shuttle.visit(this, body);
    }
  
    @Override public <R> R accept(Visitor<R> visitor) {
      return visitor.visit(this);
    }
  
    @Override public void accept(ExpressionWriter writer) {
      String modifiers = Modifier.toString(modifier);
      writer.append(modifiers);
      if (!modifiers.isEmpty()) {
        writer.append(' ');
      }
      //noinspection unchecked
      writer
          .append(resultType)
          .list("(", ", ", ")",
              () -> (Iterator) parameters.stream().map(parameter -> {
                final String modifiers1 =
                    Modifier.toString(parameter.modifier);
                return modifiers1 + (modifiers1.isEmpty() ? "" : " ")
                    + Types.className(parameter.getType()) + " "
                    + parameter.name;
              }).iterator())
          .append(' ').append(body);
      writer.newlineAndIndent();
    }
  
    @Override public boolean equals(@Nullable Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
  
      ConstructorDeclaration that = (ConstructorDeclaration) o;
      return modifier == that.modifier
          && body.equals(that.body)
          && parameters.equals(that.parameters)
          && resultType.equals(that.resultType);
    }
  
    @Override public int hashCode() {
      int result = hash;
      if (result == 0) {
        result = Objects.hash(modifier, resultType, parameters, body);
        if (result == 0) {
          result = 1;
        }
        hash = result;
      }
      return result;
    }
  }
  