bundles/org.apache.jasper.glassfish/src/org/apache/jasper/servlet/JspCServletContext.java
public InputStream getResourceAsStream(String path) {

        try {
            return (getResource(path).openStream());
        } catch (Throwable t) {
            return (null);
        }

    }
public InputStream getResourceAsStream(String path) {

        try {
            return (getResource(path).openStream());
        } catch (Throwable t) {
            return (null);
        }

    }
Return an InputStream allowing access to the resource at the
specified context-relative path.

@param path Context-relative path of the desired resource