/*
 * SonarQube Java
 * Copyright (C) 2012-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * 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  02110-1301, USA.
 */
package org.sonar.java.se.checks;

import org.sonar.plugins.java.api.tree.BaseTreeVisitor;
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.MethodInvocationTree;
import org.sonar.plugins.java.api.tree.ParenthesizedTree;
import org.sonar.plugins.java.api.tree.SwitchStatementTree;
import org.sonar.plugins.java.api.tree.Tree;
import org.sonar.plugins.java.api.tree.TypeCastTree;

public class SyntaxTreeNameFinder extends BaseTreeVisitor {

  private String name;

  public static String getName(Tree syntaxNode) {
    SyntaxTreeNameFinder finder = new SyntaxTreeNameFinder();
    syntaxNode.accept(finder);
    return finder.getName();
  }

  private String getName() {
    return name;
  }

  @Override
  public void visitIdentifier(IdentifierTree tree) {
    name = tree.name();
  }

  @Override
  public void visitMemberSelectExpression(MemberSelectExpressionTree tree) {
    tree.expression().accept(this);
  }

  @Override
  public void visitSwitchStatement(SwitchStatementTree tree) {
    tree.expression().accept(this);
  }

  @Override
  public void visitParenthesized(ParenthesizedTree tree) {
    tree.expression().accept(this);
  }

  @Override
  public void visitTypeCast(TypeCastTree tree) {
    tree.expression().accept(this);
  }

  @Override
  public void visitMethodInvocation(MethodInvocationTree tree) {
    ExpressionTree methodSelect = tree.methodSelect();
    if(methodSelect.is(Tree.Kind.MEMBER_SELECT)) {
      name = ((MemberSelectExpressionTree) methodSelect).identifier().name();
    } else {
      methodSelect.accept(this);
    }
  }
}