AllBranchesIdenticalScalaCheck.java

/*
 * SonarSource Scala
 * Copyright (C) 2018-2025 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the Sonar Source-Available License for more details.
 *
 * You should have received a copy of the Sonar Source-Available License
 * along with this program; if not, see https://sonarsource.com/license/ssal/
 */
package org.sonarsource.scala.checks;

import org.sonar.check.Rule;
import org.sonarsource.slang.api.MatchTree;
import org.sonarsource.slang.api.Tree;
import org.sonarsource.slang.checks.AllBranchesIdenticalCheck;
import org.sonarsource.slang.checks.api.CheckContext;

@Rule(key = "S3923")
public class AllBranchesIdenticalScalaCheck extends AllBranchesIdenticalCheck {

  @Override
  protected void onAllIdenticalBranches(CheckContext ctx, Tree tree) {
    if (!hasPatternMatchCase(tree)) {
      ctx.reportIssue(tree, "Remove this conditional structure or edit its code blocks so that they're not all the same.");
    }
  }

  private static boolean hasPatternMatchCase(Tree tree) {
    return tree instanceof MatchTree &&
      ((MatchTree)tree).cases().stream().anyMatch(PatternMatchHelper::hasPatternMatchedVariable);
  }
}