XPathImpl.java 文件源码

/**
 * <p>Establishes a function resolver.</p>
 *
 * @param resolver XPath function resolver
 */
public void setXPathFunctionResolver(XPathFunctionResolver resolver) {
    if ( resolver == null ) {
        String fmsg = XSLMessages.createXPATHMessage(
                XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
                new Object[] {"XPathFunctionResolver"} );
        throw new NullPointerException( fmsg );
    }
    this.functionResolver = resolver;
}