/*******************************************************************************

  * Copyright (c) 2008 Ketan Padegaonkar and others.

  * All rights reserved. This program and the accompanying materials

  * are made available under the terms of the Eclipse Public License v1.0

  * which accompanies this distribution, and is available at

  * http://www.eclipse.org/legal/epl-v10.html

  *

  * Contributors:

  *     Ketan Padegaonkar - initial API and implementation

  *     Ketan Padegaonkar - http://swtbot.org/bugzilla/show_bug.cgi?id=126

  *******************************************************************************/

 package org.eclipse.swtbot.swt.finder.matchers;

 import java.util.regex.Pattern;

 import org.eclipse.swt.widgets.Widget;

 import org.hamcrest.Description;

 import org.hamcrest.Factory;

 import org.hamcrest.Matcher;

 /**

  * Matches widgets if the getText() method of the widget matches the specified regex.

  * 

  * @author Ketan Padegaonkar <KetanPadegaonkar [at] gmail [dot] com>

  * @version $Id$

  * @since 2.0

  */

 public class WithRegex<T extends Widget> extends AbstractMatcher<T> {

         /** The regular expression string. */

         private Pattern        pattern;

         /**

          * COnstructs the regular expression matcher with the given regular expression stirng.

          * 

          * @param regex the regex to match on the {@link org.eclipse.swt.widgets.Widget}

          */

         WithRegex(String regex) {

                 pattern = Pattern.compile("([\r\n]|.)*" + regex + "([\r\n]|.)*");

         }

         protected boolean doMatch(Object obj) {

                 try {

                         return pattern.matcher(WithText.getText(obj)).matches();

                 } catch (Exception e) {

                         // do nothing

                 }

                 return false;

         }

         public void describeTo(Description description) {

                 description.appendText("with regex '").appendValue(pattern).appendText("'"); //$NON-NLS-1$ //$NON-NLS-2$

         }

         /**

          * Matches a widget that has the specified regex.

          * 

          * @param regex the label.

          * @return a matcher.

          * @since 2.0

          */

         @Factory

         public static <T extends Widget> Matcher<T> withRegex(String regex) {

                 return new WithRegex<T>(regex);

         }

 }