org.sonar.java.JavaFilesCache Maven / Gradle / Ivy

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/*
 * SonarQube Java
 * Copyright (C) 2012-2024 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.sonar.java;

import java.util.Deque;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Set;
import org.apache.commons.lang3.StringUtils;
import org.sonar.java.model.JavaTree;
import org.sonar.java.model.JavaTree.PackageDeclarationTreeImpl;
import org.sonar.plugins.java.api.JavaFileScanner;
import org.sonar.plugins.java.api.JavaFileScannerContext;
import org.sonar.plugins.java.api.tree.BaseTreeVisitor;
import org.sonar.plugins.java.api.tree.ClassTree;
import org.sonar.plugins.java.api.tree.IdentifierTree;
import org.sonar.plugins.java.api.tree.MethodTree;
import org.sonar.plugins.java.api.tree.Tree;

public class JavaFilesCache extends BaseTreeVisitor implements JavaFileScanner {

  private Set classNames = new HashSet<>();
  private Deque currentClassKey = new LinkedList<>();
  private Deque parent = new LinkedList<>();
  private Deque anonymousInnerClassCounter = new LinkedList<>();
  private String currentPackage;

  public Set getClassNames() {
    return classNames;
  }

  @Override
  public void scanFile(JavaFileScannerContext context) {
    JavaTree.CompilationUnitTreeImpl tree = (JavaTree.CompilationUnitTreeImpl) context.getTree();
    currentPackage = PackageDeclarationTreeImpl.packageNameAsString(tree.packageDeclaration()).replace('.', '/');
    currentClassKey.clear();
    parent.clear();
    anonymousInnerClassCounter.clear();
    scan(tree);
  }

  @Override
  public void visitClass(ClassTree tree) {
    String className = "";
    IdentifierTree simpleName = tree.simpleName();
    if (simpleName != null) {
      className = simpleName.name();
    }
    String key = getClassKey(className);
    currentClassKey.push(key);
    parent.push(tree);
    anonymousInnerClassCounter.push(0);
    classNames.add(key);
    super.visitClass(tree);
    currentClassKey.pop();
    parent.pop();
    anonymousInnerClassCounter.pop();
  }

  private String getClassKey(String className) {
    String key = className;
    if (StringUtils.isNotEmpty(currentPackage)) {
      key = currentPackage + "/" + className;
    }
    if ("".equals(className) || (parent.peek() != null && parent.peek().is(Tree.Kind.METHOD))) {
      // inner class declared within method
      int count = anonymousInnerClassCounter.pop() + 1;
      key = currentClassKey.peek() + "$" + count + className;
      anonymousInnerClassCounter.push(count);
    } else if (currentClassKey.peek() != null) {
      key = currentClassKey.peek() + "$" + className;
    }
    return key;
  }

  @Override
  public void visitMethod(MethodTree tree) {
    parent.push(tree);
    super.visitMethod(tree);
    parent.pop();
  }
}