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.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Represents a {@code try ... catch ... finally} block.
   */
  public class TryStatement extends Statement {
    public final Statement body;
    public final List<CatchBlock> catchBlocks;
    public final @Nullable Statement fynally;
  
    public TryStatement(Statement body, List<CatchBlock> catchBlocks,
        @Nullable Statement fynally) {
      super(ExpressionType.Try, body.getType());
      this.body = requireNonNull(body, "body");
      this.catchBlocks = requireNonNull(catchBlocks, "catchBlocks");
      this.fynally = fynally;
    }
  
    @Override public Statement accept(Shuttle shuttle) {
      shuttle = shuttle.preVisit(this);
      Statement body1 = body.accept(shuttle);
      List<CatchBlock> catchBlocks1 = new ArrayList<>();
      for (CatchBlock cb : catchBlocks) {
        Statement cbBody = cb.body.accept(shuttle);
        catchBlocks1.add(
            Expressions.catch_(cb.parameter, cbBody));
      }
      Statement fynally1 =
          fynally == null ? null : fynally.accept(shuttle);
      return shuttle.visit(this, body1, catchBlocks1, fynally1);
    }
  
    @Override public <R> R accept(Visitor<R> visitor) {
      return visitor.visit(this);
    }
  
    @Override void accept0(ExpressionWriter writer) {
      writer.append("try ").append(Blocks.toBlock(body));
      for (CatchBlock catchBlock : catchBlocks) {
        writer.backUp();
        writer.append(" catch (").append(catchBlock.parameter.declString())
            .append(") ").append(Blocks.toBlock(catchBlock.body));
      }
      if (fynally != null) {
        writer.backUp();
        writer.append(" finally ").append(Blocks.toBlock(fynally));
      }
    }
  
    @Override public boolean equals(@Nullable Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      if (!super.equals(o)) {
        return false;
      }
  
      TryStatement that = (TryStatement) o;
  
      if (!body.equals(that.body)) {
        return false;
      }
      if (!catchBlocks.equals(that.catchBlocks)) {
        return false;
      }
      if (fynally != null ? !fynally.equals(that.fynally) : that.fynally
          != null) {
        return false;
      }
  
      return true;
    }
  
    @Override public int hashCode() {
      return Objects.hash(nodeType, type, body, catchBlocks, fynally);
    }
  }
  