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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 2012-2018 the original author or authors.
 */
package org.assertj.swing.text;

import javax.annotation.Nonnull;
import javax.swing.text.JTextComponent;

import org.assertj.swing.annotation.RunsInCurrentThread;

/**
 * Reads the text displayed in a {@code JTextComponent}.
 * 
 * @author Alex Ruiz
 */
public class JTextComponentTextReader extends TextReader {
  /**
   * @return {@code JTextComponent.class}.
   */
  @Override
  @Nonnull public Class supportedComponent() {
    return JTextComponent.class;
  }

  /**
   * Indicates whether the given {@code JTextComponent} displays the given text.
   * 
   * @param textComponent the given {@code JTextComponent}.
   * @param text the given text.
   * @return {@code true} if the given {@code JTextComponent} displays the given text; {@code false} otherwise.
   */
  @RunsInCurrentThread
  @Override
  protected boolean checkContainsText(@Nonnull JTextComponent textComponent, @Nonnull String text) {
    String componentText = textComponent.getText();
    if (componentText == null) {
      return false;
    }
    return componentText.contains(text);
  }
}