import com.sun.org.apache.xerces.internal.util.PropertyState; //导入依赖的package包/类
/**
 * Check a property. If the property is know and supported, this method
 * simply returns. Otherwise, the appropriate exception is thrown.
 *
 * @param propertyId The unique identifier (URI) of the property
 *                   being set.
 *
 * @throws XMLConfigurationException Thrown for configuration error.
 *                                   In general, components should
 *                                   only throw this exception if
 *                                   it is <strong>really</strong>
 *                                   a critical error.
 */
protected PropertyState checkProperty(String propertyId)
    throws XMLConfigurationException {

    //
    // 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)) {
            return PropertyState.RECOGNIZED;
        }
    }

    //
    // Not recognized
    //

    return super.checkProperty(propertyId);

}
 

import com.sun.org.apache.xerces.internal.util.PropertyState; //导入依赖的package包/类
public PropertyState getPropertyState(String propertyId)
    throws XMLConfigurationException {
    if (LOCALE.equals(propertyId)) {
        return PropertyState.is(getLocale());
    }
    return super.getPropertyState(propertyId);
}
 

import com.sun.org.apache.xerces.internal.util.PropertyState; //导入依赖的package包/类
/**
 * Check a property. If the property is known and supported, this method
 * simply returns. Otherwise, the appropriate exception is thrown.
 *
 * @param propertyId The unique identifier (URI) of the property
 *                   being set.
 * @exception com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException If the
 *            requested feature is not known or supported.
 */
protected PropertyState checkProperty(String propertyId)
    throws XMLConfigurationException {

    // special cases
    if (propertyId.startsWith(Constants.SAX_PROPERTY_PREFIX)) {
        final int suffixLength = propertyId.length() - Constants.SAX_PROPERTY_PREFIX.length();

        //
        // http://xml.org/sax/properties/xml-string
        // Value type: String
        // Access: read-only
        //   Get the literal string of characters associated with the
        //   current event.  If the parser recognises and supports this
        //   property but is not currently parsing text, it should return
        //   null (this is a good way to check for availability before the
        //   parse begins).
        //
        if (suffixLength == Constants.XML_STRING_PROPERTY.length() &&
            propertyId.endsWith(Constants.XML_STRING_PROPERTY)) {
            // REVISIT - we should probably ask xml-dev for a precise
            // definition of what this is actually supposed to return, and
            // in exactly which circumstances.
            return PropertyState.NOT_SUPPORTED;
        }
    }

    // check property
    return super.checkProperty(propertyId);

}
 

import com.sun.org.apache.xerces.internal.util.PropertyState; //导入依赖的package包/类
/**
 * Returns the value of a property.
 *
 * @param propertyId The property identifier.
 * @return the value of the property
 *
 * @throws XMLConfigurationException Thrown for configuration error.
 *                                   In general, components should
 *                                   only throw this exception if
 *                                   it is <strong>really</strong>
 *                                   a critical error.
 */
public PropertyState getPropertyState(String propertyId)
        throws XMLConfigurationException {
    if (LOCALE.equals(propertyId)) {
        return PropertyState.is(getLocale());
    }
    final Object component = fComponents.get(propertyId);
    if (component != null) {
        return PropertyState.is(component);
    }
    else if (fComponents.containsKey(propertyId)) {
        return PropertyState.is(null);
    }
    return super.getPropertyState(propertyId);
}
 

import com.sun.org.apache.xerces.internal.util.PropertyState; //导入依赖的package包/类
public PropertyState getPropertyState(String propertyId) {
    if (XMLGRAMMAR_POOL.equals(propertyId)) {
        return PropertyState.is(fGrammarPool);
    }
    else if (VALIDATION_MANAGER.equals(propertyId)) {
        return PropertyState.is(fValidationManager);
    }
    return fParentComponentManager.getPropertyState(propertyId);
}
 

import com.sun.org.apache.xerces.internal.util.PropertyState; //导入依赖的package包/类
public Object getProperty(String propertyId, Object defaultValue) {
    PropertyState state = getPropertyState(propertyId);
    if (state.isExceptional()) {
        return defaultValue;
    }
    return state.state;
}