import com.sun.org.apache.xerces.internal.xni.parser.XMLDTDScanner; //导入依赖的package包/类
/**
 * Sets the value of a property. This method is called by the component
 * manager any time after reset when a property changes value.
 * <p>
 * <strong>Note:</strong> Components should silently ignore properties
 * that do not affect the operation of the component.
 *
 * @param propertyId The property identifier.
 * @param value      The value of the property.
 *
 * @throws SAXNotRecognizedException The component should not throw
 *                                   this exception.
 * @throws SAXNotSupportedException The component should not throw
 *                                  this exception.
 */
public void setProperty(String propertyId, Object value)
throws XMLConfigurationException {

    super.setProperty(propertyId, value);

    // Xerces properties
    if (propertyId.startsWith(Constants.XERCES_PROPERTY_PREFIX)) {
        final int suffixLength = propertyId.length() - Constants.XERCES_PROPERTY_PREFIX.length();

        if (suffixLength == Constants.DTD_SCANNER_PROPERTY.length() &&
            propertyId.endsWith(Constants.DTD_SCANNER_PROPERTY)) {
            fDTDScanner = (XMLDTDScanner)value;
        }
        if (suffixLength == Constants.NAMESPACE_CONTEXT_PROPERTY.length() &&
            propertyId.endsWith(Constants.NAMESPACE_CONTEXT_PROPERTY)) {
            if (value != null) {
                fNamespaceContext = (NamespaceContext)value;
            }
        }

        return;
    }

}
 

import com.sun.org.apache.xerces.internal.xni.parser.XMLDTDScanner; //导入依赖的package包/类
/** Create a DTD scanner. */
protected XMLDTDScanner createDTDScanner() {
    return new XMLDTDScannerImpl();
}