001    /*
002     * Created on Oct 21, 2008
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
005     * the License. You may obtain a copy of the License at
006     *
007     * http://www.apache.org/licenses/LICENSE-2.0
008     *
009     * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
010     * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
011     * specific language governing permissions and limitations under the License.
012     *
013     * Copyright @2008-2010 the original author or authors.
014     */
015    package org.fest.swing.driver;
016    
017    import java.awt.Component;
018    
019    import javax.swing.JLabel;
020    
021    import org.fest.swing.annotation.RunsInCurrentThread;
022    
023    /**
024     * Understands a basic implementation of <code>{@link CellRendererReader}</code>.
025     *
026     * @author Alex Ruiz
027     */
028    public class BasicCellRendererReader implements CellRendererReader {
029    
030      /**
031       * Reads the value in the given cell renderer component, or returns <code>null</code> if the renderer belongs to an
032       * unknown component type. Internally, this method will call <code>getText()</code> if the given renderer is an
033       * instance of <code>{@link JLabel}</code></li>.
034       * <p>
035       * <b>Note:</b> This method is <b>not</b> guaranteed to be executed in the event dispatch thread (EDT.) Clients are
036       * responsible for calling this method from the EDT.
037       * </p>
038       * @param c the given cell renderer component.
039       * @return the value of the given <code>Component</code>, or <code>null</code> if the renderer belongs to an unknown
040       * component type.
041       */
042      @RunsInCurrentThread
043      public String valueFrom(Component c) {
044        if (c instanceof JLabel) return ((JLabel)c).getText();
045        return null;
046      }
047    }