XPathImpl.java 文件源码

/**
 * <p>Establishes a variable resolver.</p>
 *
 * @param resolver Variable Resolver
 */
public void setXPathVariableResolver(XPathVariableResolver resolver) {
    if ( resolver == null ) {
        String fmsg = XSLMessages.createXPATHMessage(
                XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
                new Object[] {"XPathVariableResolver"} );
        throw new NullPointerException( fmsg );
    }
    this.variableResolver = resolver;
}