Class PageContextImpl

java/org/apache/jasper/runtime/PageContextImpl.java:57–675

Implementation of the PageContext class from the JSP spec. Also doubles as a VariableResolver for the EL.

 * Implementation of the PageContext class from the JSP spec. Also doubles as a VariableResolver for the EL.
 */
public class PageContextImpl extends PageContext {

    private static final JspFactory jspf = JspFactory.getDefaultFactory();

    private static final BodyContentImpl[] EMPTY_BODY_CONTENT_IMPL_ARRAY = new BodyContentImpl[0];

    private BodyContentImpl[] outs;

    private int depth;

    // per-servlet state
    private Servlet servlet;

    private ServletConfig config;

    private ServletContext context;

    private JspApplicationContextImpl applicationContext;

    private String errorPageURL;

    private boolean limitBodyContentBuffer;

    private int bodyContentTagBufferSize = Constants.DEFAULT_TAG_BUFFER_SIZE;

    // page-scope attributes
    private final transient HashMap<String,Object> attributes;

    // per-request state
    private transient ServletRequest request;

    private transient ServletResponse response;

    private transient HttpSession session;

    private transient ELContextImpl elContext;


    // initial output stream
    private transient JspWriter out;

    private transient JspWriterImpl baseOut;

    PageContextImpl() {
        this.outs = EMPTY_BODY_CONTENT_IMPL_ARRAY;
        this.attributes = new HashMap<>(16);
        this.depth = -1;
    }

    @Override
    public void initialize(Servlet servlet, ServletRequest request, ServletResponse response, String errorPageURL,
            boolean needsSession, int bufferSize, boolean autoFlush) throws IOException {

        // initialize state
        this.servlet = servlet;
        this.config = servlet.getServletConfig();
        this.context = config.getServletContext();
        this.errorPageURL = errorPageURL;