org.sonar.java.model.PackageUtils Maven / Gradle / Ivy

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/*
 * SonarQube Java
 * Copyright (C) 2012 SonarSource
 * [email protected]
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * 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 GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.java.model;

import org.sonar.plugins.java.api.tree.ExpressionTree;
import org.sonar.plugins.java.api.tree.IdentifierTree;
import org.sonar.plugins.java.api.tree.MemberSelectExpressionTree;
import org.sonar.plugins.java.api.tree.PackageDeclarationTree;
import org.sonar.plugins.java.api.tree.Tree;

import javax.annotation.Nullable;
import java.util.Deque;
import java.util.LinkedList;

public class PackageUtils {

  private PackageUtils(){
  }

  public static String packageName(@Nullable PackageDeclarationTree packageDeclarationTree, String separator) {
    if(packageDeclarationTree == null) {
      return "";
    }
    Deque pieces = new LinkedList<>();
    ExpressionTree expr = packageDeclarationTree.packageName();
    while (expr.is(Tree.Kind.MEMBER_SELECT)) {
      MemberSelectExpressionTree mse = (MemberSelectExpressionTree) expr;
      pieces.push(mse.identifier().name());
      pieces.push(separator);
      expr = mse.expression();
    }
    if (expr.is(Tree.Kind.IDENTIFIER)) {
      IdentifierTree idt = (IdentifierTree) expr;
      pieces.push(idt.name());
    }

    StringBuilder sb = new StringBuilder();
    for (String piece: pieces) {
      sb.append(piece);
    }
    return sb.toString();
  }

}