content: /*
   * Created on Jul 29, 2010
   *
   * 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 @2010-2013 the original author or authors.
   */
  package org.fest.swing.text;
  
  import java.awt.Component;
  
  import javax.annotation.Nonnull;
  
  import org.fest.swing.annotation.RunsInCurrentThread;
  
  /**
   * Reads the text of an AWT or Swing {@code Component}.
   *
   * @param <T> the type of {@code Component} this reader supports.
   *
   * @author Alex Ruiz
   *
   * @since 1.3
   */
  public abstract class TextReader<T extends Component> {
    /**
     * @return the type of AWT or Swing {@code Component} this reader supports.
     */
    public abstract @Nonnull Class<T> supportedComponent();
  
    /**
     * Indicates whether the given AWT or Swing {@code Component} contains or displays the given text.
     *
     * @param c the given {@code Component}.
     * @param text the given text.
     * @return {@code true} if the given {@code Component} contains or displays the given text; {@code false} otherwise.
     * @throws IllegalArgumentException if this reader does not support the type of the given {@code Component} (e.g. this
     *           reader supports {@code JButton}s and a {@code JLabel} is passed.)
     * @see #supportedComponent()
     */
    @RunsInCurrentThread
    public final boolean containsText(@Nonnull Component c, @Nonnull String text) {
      checkCorrectType(c);
      T casted = supportedComponent().cast(c);
      return checkContainsText(casted, text);
    }
  
    private void checkCorrectType(Component c) {
      Class<T> type = supportedComponent();
      if (!type.isAssignableFrom(c.getClass())) {
        String msg = String.format("Expecting component of type %s but got %s", type.getName(), c.getClass().getName());
        throw new IllegalArgumentException(msg);
      }
    }
  
    /**
     * Indicates whether the given AWT or Swing {@code Component} contains or displays the given text. Implementations
     * must ensure that they are executed in the current thread.
     *
     * @param component the given {@code Component}.
     * @param text the given text.
     * @return {@code true} if the given {@code Component} contains or displays the given text; {@code false} otherwise.
     */
    @RunsInCurrentThread
    protected abstract boolean checkContainsText(@Nonnull T component, @Nonnull String text);
  }
  