Package org.apache.jasper.runtime
Class JspContextWrapper
java.lang.Object
javax.servlet.jsp.JspContext
javax.servlet.jsp.PageContext
org.apache.jasper.runtime.JspContextWrapper
public class JspContextWrapper
extends javax.servlet.jsp.PageContext
Implementation of a JSP Context Wrapper.
The JSP Context Wrapper is a JspContext created and maintained by a tag
handler implementation. It wraps the Invoking JSP Context, that is, the
JspContext instance passed to the tag handler by the invoking page via
setJspContext().
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate javax.el.ELContext
private javax.servlet.jsp.PageContext
Fields inherited from class javax.servlet.jsp.PageContext
APPLICATION, APPLICATION_SCOPE, CONFIG, EXCEPTION, OUT, PAGE, PAGE_SCOPE, PAGECONTEXT, REQUEST, REQUEST_SCOPE, RESPONSE, SESSION, SESSION_SCOPE
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate void
copyTagToPageScope
(int scope) Copies the variables of the given scope from the virtual page scope of this JSP context wrapper to the page scope of the invoking JSP context.private String
Checks to see if the given variable name is used as an alias, and if so, returns the variable name for which it is used as an alias.findAttribute
(String name) void
getAttribute
(String name) getAttribute
(String name, int scope) getAttributeNamesInScope
(int scope) int
getAttributesScope
(String name) javax.el.ELContext
javax.servlet.jsp.el.ExpressionEvaluator
javax.servlet.jsp.JspWriter
getOut()
getPage()
javax.servlet.ServletRequest
javax.servlet.ServletResponse
static javax.servlet.jsp.PageContext
getRootPageContext
(javax.servlet.jsp.PageContext pc) javax.servlet.ServletConfig
javax.servlet.ServletContext
javax.servlet.http.HttpSession
javax.servlet.jsp.el.VariableResolver
void
void
void
void
void
initialize
(javax.servlet.Servlet servlet, javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, String errorPageURL, boolean needsSession, int bufferSize, boolean autoFlush) javax.servlet.jsp.JspWriter
popBody()
javax.servlet.jsp.tagext.BodyContent
pushBody()
javax.servlet.jsp.JspWriter
void
release()
void
removeAttribute
(String name) void
removeAttribute
(String name, int scope) private void
Restores the values of any NESTED variables in the invoking JSP context.private void
Saves the values of any NESTED variables that are present in the invoking JSP context, so they can later be restored.void
setAttribute
(String name, Object value) void
setAttribute
(String name, Object value, int scope) void
Synchronize variables before fragment invokationvoid
Synchronize variables at begin of tag filevoid
Synchronize variables at end of tag fileMethods inherited from class javax.servlet.jsp.PageContext
getErrorData
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Field Details
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invokingJspCtxt
private javax.servlet.jsp.PageContext invokingJspCtxt -
pageAttributes
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nestedVars
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atBeginVars
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atEndVars
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aliases
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originalNestedVars
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elContext
private javax.el.ELContext elContext
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Constructor Details
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JspContextWrapper
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Method Details
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initialize
public void initialize(javax.servlet.Servlet servlet, javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, String errorPageURL, boolean needsSession, int bufferSize, boolean autoFlush) throws IOException, IllegalStateException, IllegalArgumentException - Specified by:
initialize
in classjavax.servlet.jsp.PageContext
- Throws:
IOException
IllegalStateException
IllegalArgumentException
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getAttribute
- Specified by:
getAttribute
in classjavax.servlet.jsp.JspContext
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getAttribute
- Specified by:
getAttribute
in classjavax.servlet.jsp.JspContext
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setAttribute
- Specified by:
setAttribute
in classjavax.servlet.jsp.JspContext
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setAttribute
- Specified by:
setAttribute
in classjavax.servlet.jsp.JspContext
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findAttribute
- Specified by:
findAttribute
in classjavax.servlet.jsp.JspContext
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removeAttribute
- Specified by:
removeAttribute
in classjavax.servlet.jsp.JspContext
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removeAttribute
- Specified by:
removeAttribute
in classjavax.servlet.jsp.JspContext
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getAttributesScope
- Specified by:
getAttributesScope
in classjavax.servlet.jsp.JspContext
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getAttributeNamesInScope
- Specified by:
getAttributeNamesInScope
in classjavax.servlet.jsp.JspContext
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release
public void release()- Specified by:
release
in classjavax.servlet.jsp.PageContext
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getOut
public javax.servlet.jsp.JspWriter getOut()- Specified by:
getOut
in classjavax.servlet.jsp.JspContext
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getSession
public javax.servlet.http.HttpSession getSession()- Specified by:
getSession
in classjavax.servlet.jsp.PageContext
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getPage
- Specified by:
getPage
in classjavax.servlet.jsp.PageContext
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getRequest
public javax.servlet.ServletRequest getRequest()- Specified by:
getRequest
in classjavax.servlet.jsp.PageContext
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getResponse
public javax.servlet.ServletResponse getResponse()- Specified by:
getResponse
in classjavax.servlet.jsp.PageContext
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getException
- Specified by:
getException
in classjavax.servlet.jsp.PageContext
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getServletConfig
public javax.servlet.ServletConfig getServletConfig()- Specified by:
getServletConfig
in classjavax.servlet.jsp.PageContext
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getServletContext
public javax.servlet.ServletContext getServletContext()- Specified by:
getServletContext
in classjavax.servlet.jsp.PageContext
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getRootPageContext
public static javax.servlet.jsp.PageContext getRootPageContext(javax.servlet.jsp.PageContext pc) -
getELContext
public javax.el.ELContext getELContext()- Specified by:
getELContext
in classjavax.servlet.jsp.JspContext
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forward
- Specified by:
forward
in classjavax.servlet.jsp.PageContext
- Throws:
javax.servlet.ServletException
IOException
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include
- Specified by:
include
in classjavax.servlet.jsp.PageContext
- Throws:
javax.servlet.ServletException
IOException
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include
public void include(String relativeUrlPath, boolean flush) throws javax.servlet.ServletException, IOException - Specified by:
include
in classjavax.servlet.jsp.PageContext
- Throws:
javax.servlet.ServletException
IOException
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getVariableResolver
public javax.servlet.jsp.el.VariableResolver getVariableResolver()- Specified by:
getVariableResolver
in classjavax.servlet.jsp.JspContext
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pushBody
public javax.servlet.jsp.tagext.BodyContent pushBody()- Overrides:
pushBody
in classjavax.servlet.jsp.PageContext
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pushBody
- Overrides:
pushBody
in classjavax.servlet.jsp.JspContext
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popBody
public javax.servlet.jsp.JspWriter popBody()- Overrides:
popBody
in classjavax.servlet.jsp.JspContext
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getExpressionEvaluator
public javax.servlet.jsp.el.ExpressionEvaluator getExpressionEvaluator()- Specified by:
getExpressionEvaluator
in classjavax.servlet.jsp.JspContext
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handlePageException
- Specified by:
handlePageException
in classjavax.servlet.jsp.PageContext
- Throws:
IOException
javax.servlet.ServletException
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handlePageException
- Specified by:
handlePageException
in classjavax.servlet.jsp.PageContext
- Throws:
IOException
javax.servlet.ServletException
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syncBeginTagFile
public void syncBeginTagFile()Synchronize variables at begin of tag file -
syncBeforeInvoke
public void syncBeforeInvoke()Synchronize variables before fragment invokation -
syncEndTagFile
public void syncEndTagFile()Synchronize variables at end of tag file -
copyTagToPageScope
private void copyTagToPageScope(int scope) Copies the variables of the given scope from the virtual page scope of this JSP context wrapper to the page scope of the invoking JSP context.- Parameters:
scope
- variable scope (one of NESTED, AT_BEGIN, or AT_END)
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saveNestedVariables
private void saveNestedVariables()Saves the values of any NESTED variables that are present in the invoking JSP context, so they can later be restored. -
restoreNestedVariables
private void restoreNestedVariables()Restores the values of any NESTED variables in the invoking JSP context. -
findAlias
Checks to see if the given variable name is used as an alias, and if so, returns the variable name for which it is used as an alias.- Parameters:
varName
- The variable name to check- Returns:
- The variable name for which varName is used as an alias, or varName if it is not being used as an alias
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