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Java Framework based on Spring Framework, Freemarker and Simplicity

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package com.clickntap.tool.html;

import javax.swing.text.html.parser.DTD;

public class HTMLDocumentParser extends javax.swing.text.html.parser.DocumentParser {
  public static final String TAGCLOSER = "/>";
  public static final String XML_TAGNAME = "?xml";
  public static final String EXPECTED_TAGNAME_ERROR_KEY = "expected.tagname";
  public boolean expectedTagName = false;

  public HTMLDocumentParser(DTD dtd) {
    super(dtd);
  }

  protected void error(String errorKey) {
    if (errorKey.equals(EXPECTED_TAGNAME_ERROR_KEY))
      expectedTagName = true;
    else
      super.error(errorKey);
  }

  protected void handleText(char data[]) {
    if (expectedTagName) {
      expectedTagName = false;
      int x0, x1;
      String s = new String(data);
      if ((x0 = s.indexOf(XML_TAGNAME)) != -1 && (x1 = s.indexOf(TAGCLOSER, x0)) != -1) {
        s = (x1 + 2 >= s.length()) ? s.substring(0, x0) : s.substring(0, x0) + s.substring(x1 + 2);
        super.handleText(s.toCharArray());
        return;
      } else
        super.error(EXPECTED_TAGNAME_ERROR_KEY);
    }
    super.handleText(data);
  }
}