/**

  * Copyright (c) 2011-2014, jcabi.com

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met: 1) Redistributions of source code must retain the above

  * copyright notice, this list of conditions and the following

  * disclaimer. 2) Redistributions in binary form must reproduce the above

  * copyright notice, this list of conditions and the following

  * disclaimer in the documentation and/or other materials provided

  * with the distribution. 3) Neither the name of the jcabi.com nor

  * the names of its contributors may be used to endorse or promote

  * products derived from this software without specific prior written

  * permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT

  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL

  * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

  * OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package com.jcabi.matchers;

 import com.jcabi.aspects.Immutable;

 import com.jcabi.log.Logger;

 import com.jcabi.w3c.Validator;

 import java.io.IOException;

 import lombok.EqualsAndHashCode;

 import lombok.ToString;

 import org.hamcrest.Description;

 import org.hamcrest.TypeSafeMatcher;

 /**

  * Matcher for checking HTML and CSS documents against W3C validation services.

  *

  * <p>Objects of this class are immutable and thread-safe.

  *

  * @author Carlos Miranda (miranda.cma@gmail.com)

  * @version $Id$

  */

 @Immutable

 @ToString

 @EqualsAndHashCode(callSuper = false, of = "validator")

 final class W3CValidatorMatcher extends TypeSafeMatcher<String> {

     /**

      * The W3C Validator.

      */

     private final transient Validator validator;

     /**

      * Ctor.

      * @param val The Validator to use.

      */

     W3CValidatorMatcher(final Validator val) {

         super();

         this.validator = val;

     }

     @Override

     public void describeTo(final Description description) {

         description.appendText("W3C validator")

             .appendText(this.validator.toString());

     }

     @Override

     public boolean matchesSafely(final String content) {

         boolean matches = false;

         try {

             matches = this.validator.validate(content).valid();

         } catch (final IOException ex) {

             Logger.warn(

                 this,

                 "#matchesSafely('%s'): unable to perform validation: %s",

                 content, ex.getMessage()

             );

         }

         return matches;

     }

 }