Class JspUtil

java/org/apache/jasper/compiler/JspUtil.java:37–1019

This class has all the utility method(s). Ideally should move all the bean containers here.

 * This class has all the utility method(s). Ideally should move all the bean containers here.
 */
public class JspUtil {

    private static final String WEB_INF_TAGS = "/WEB-INF/tags/";
    private static final String META_INF_TAGS = "/META-INF/tags/";

    // Delimiters for request-time expressions (JSP and XML syntax)
    private static final String OPEN_EXPR = "<%=";
    private static final String CLOSE_EXPR = "%>";

    private static final String[] javaKeywords =
            { "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue",
                    "default", "do", "double", "else", "enum", "extends", "final", "finally", "float", "for", "goto",
                    "if", "implements", "import", "instanceof", "int", "interface", "long", "native", "new", "package",
                    "private", "protected", "public", "return", "short", "static", "strictfp", "super", "switch",
                    "synchronized", "this", "throw", "throws", "transient", "try", "void", "volatile", "while" };

    static final int JSP_INPUT_STREAM_BUFFER_SIZE = 1024;

    /**
     * Default chunk size for reading files.
     */
    public static final int CHUNKSIZE = 1024;


    /**
     * Private constructor to prevent instantiation.
     */
    private JspUtil() {
    }

    /**
     * Takes a potential expression and converts it into XML form.
     *
     * @param expression The expression to convert
     *
     * @return XML view
     */
    public static String getExprInXml(String expression) {
        String returnString;
        int length = expression.length();

        if (expression.startsWith(OPEN_EXPR) && expression.endsWith(CLOSE_EXPR)) {
            returnString = expression.substring(1, length - 1);
        } else {
            returnString = expression;
        }

        return Escape.xml(returnString);
    }

    /**
     * Checks to see if the given scope is valid.
     *
     * @param scope The scope to be checked
     * @param n     The Node containing the 'scope' attribute whose value is to be checked
     * @param err   error dispatcher
     *
     * @throws JasperException if scope is not null and different from &quot;page&quot;, &quot;request&quot;,