javax.servlet.jsp.JspFactory Maven / Gradle / Ivy
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
*
* The JspFactory is an abstract class that defines a number of factory
* methods available to a JSP page at runtime for the purposes of creating
* instances of various interfaces and classes used to support the JSP
* implementation.
*
*
* A conformant JSP Engine implementation will, during it's initialization
* instantiate an implementation dependent subclass of this class, and make
* it globally available for use by JSP implementation classes by registering
* the instance created with this class via the static setDefaultFactory() method.
*
*/
public abstract class JspFactory {
private static JspFactory deflt = null;
/**
*
* set the default factory for this implementation. It is illegal for
* any principal other than the JSP Engine runtime to call this method.
*
*
* @param default The default factory implementation
*/
public static synchronized void setDefaultFactory(JspFactory deflt) {
JspFactory.deflt = deflt;
}
/**
* @return the default factory for this implementation
*/
public static synchronized JspFactory getDefaultFactory() {
return deflt;
}
/**
*
* obtains an instance of an implementation dependent
* javax.servlet.jsp.PageContext abstract class for the calling Servlet
* and currently pending request and response.
*
*
*
* This method is typically called early in the processing of the
* _jspService() mehtod of a JSP implementation class in order to
* obtain a PageContext object for the request being processed.
*
*
* Invoking this method shall result in the PageContext.initialize()
* method being invoked. The PageContext returned is properly initialized.
*
*
* All PageContext objects obtained via this method shall be released
* by invoking releasePageContext().
*
*
* @param servlet the requesting servlet
* @param config the ServletConfig for the requesting Servlet
* @param request the current request pending on the servlet
* @param response the current response pending on the servlet
* @param errorPageURL the URL of the error page for the requesting JSP, or null
* @param needsSession true if the JSP participates in a session
* @param buffer size of buffer in bytes, PageContext.NO_BUFFER if no buffer,
* PageContext.DEFAULT_BUFFER if implementation default.
* @param autoflush should the buffer autoflush to the output stream on buffer
* overflow, or throw an IOException?
*
* @return the page context
*
* @see javax.servlet.jsp.PageContext
*/
public abstract PageContext getPageContext(Servlet servlet,
ServletRequest request,
ServletResponse response,
String errorPageURL,
boolean needsSession,
int buffer,
boolean autoflush);
/**
*
* called to release a previously allocated PageContext object. results
* in PageContext.release() being invoked. This method should be invoked
* prior to returning from the _jspService() method of a JSP implementation
* class.
*
*
* @param pc A PageContext previously obtained by getPageContext()
*/
public abstract void releasePageContext(PageContext pc);
/**
*
* called to get implementation-specific information on the current JSP engine
*
*
* @return a JspEngineInfo object describing the current JSP engine
*/
public abstract JspEngineInfo getEngineInfo();
}