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Fluent interface for functional GUI testing

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/**
 * Licensed 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.
 *
 * Copyright 2012-2015 the original author or authors.
 */
package org.assertj.swing.driver;

import static org.assertj.core.util.Preconditions.checkNotNull;
import static org.assertj.swing.driver.ComponentPreconditions.checkEnabledAndShowing;
import static org.assertj.swing.driver.JTreeAddRootIfInvisibleTask.addRootIfInvisible;
import static org.assertj.swing.edt.GuiActionRunner.execute;

import javax.annotation.Nonnull;
import javax.swing.JTree;
import javax.swing.tree.TreePath;

import org.assertj.swing.annotation.RunsInCurrentThread;
import org.assertj.swing.annotation.RunsInEDT;
import org.assertj.swing.edt.GuiQuery;

/**
 * Finds a path in a {@code JTree} that matches a given {@code String}. This query is executed in the event dispatch
 * thread (EDT).
 *
 * @author Alex Ruiz
 *
 * @see JTreePathFinder
 */
final class JTreeMatchingPathQuery {
  @RunsInEDT
  static @Nonnull TreePath verifyJTreeIsReadyAndFindMatchingPath(final @Nonnull JTree tree, final @Nonnull String path,
                                                                 final @Nonnull JTreePathFinder pathFinder) {
    TreePath result = execute(new GuiQuery() {
      @Override
      @Nonnull protected TreePath executeInEDT() {
        checkEnabledAndShowing(tree);
        return matchingPathWithRootIfInvisible(tree, path, pathFinder);
      }
    });
    return checkNotNull(result);
  }

  @RunsInEDT
  static @Nonnull TreePath matchingPathFor(final @Nonnull JTree tree, final @Nonnull String path,
                                           final @Nonnull JTreePathFinder pathFinder) {
    TreePath result = execute(() -> matchingPathWithRootIfInvisible(tree, path, pathFinder));
    return checkNotNull(result);
  }

  @RunsInCurrentThread
  static @Nonnull TreePath matchingPathWithRootIfInvisible(@Nonnull JTree tree, @Nonnull String path,
                                                           @Nonnull JTreePathFinder pathFinder) {
    TreePath matchingPath = pathFinder.findMatchingPath(tree, path);
    return addRootIfInvisible(tree, matchingPath);
  }

  private JTreeMatchingPathQuery() {
  }
}