/**

  * 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.xml.XMLDocument;

 import java.io.StringWriter;

 import java.util.Locale;

 import javax.xml.transform.OutputKeys;

 import javax.xml.transform.Transformer;

 import javax.xml.transform.TransformerException;

 import javax.xml.transform.TransformerFactory;

 import javax.xml.transform.dom.DOMSource;

 import javax.xml.transform.stream.StreamResult;

 import lombok.EqualsAndHashCode;

 import org.w3c.dom.Node;

 /**

  * Private class for DOM to String converting.

  *

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

  *

  * @author Yegor Bugayenko (yegor@tpc2.com)

  * @version $Id$

  */

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

 final class StringSource extends DOMSource {

     /**

      * The XML itself.

      */

     private final transient String xml;

     /**

      * Public ctor.

      * @param text The content of the document

      */

     StringSource(final String text) {

         super();

         this.xml = text;

         super.setNode(new XMLDocument(text).node());

     }

     /**

      * Public ctor.

      * @param node The node

      */

     StringSource(final Node node) {

         super();

         final StringWriter writer = new StringWriter();

         try {

             final Transformer transformer =

                 TransformerFactory.newInstance().newTransformer();

             transformer.setOutputProperty(

                 // @checkstyle MultipleStringLiteralsCheck (1 line)

                 OutputKeys.OMIT_XML_DECLARATION, "yes"

             );

             transformer.setOutputProperty(

                 OutputKeys.INDENT, "yes"

             );

             transformer.transform(

                 new DOMSource(node),

                 new StreamResult(writer)

             );

         } catch (final TransformerException ex) {

             throw new IllegalStateException(ex);

         }

         this.xml = writer.toString();

         this.setNode(node);

     }

     @Override

     public String toString() {

         final StringBuilder buf = new StringBuilder();

         final int length = this.xml.length();

         for (int pos = 0; pos < length; ++pos) {

             final char chr = this.xml.charAt(pos);

             // @checkstyle MagicNumber (1 line)

             if (chr > 0x7f) {

                 buf.append("&#").append(

                     Integer.toHexString(chr).toUpperCase(Locale.ENGLISH)

                 ).append(';');

             } else {

                 buf.append(chr);

             }

         }

         return buf.toString();

     }

 }