org.apache.jasper
Class JspCompilationContext

java.lang.Object
  org.apache.jasper.JspCompilationContext

public class JspCompilationContext

extends java.lang.Object

A place holder for various things that are used through out the JSP engine. This is a per-request/per-context data structure. Some of the instance variables are set at different points. Most of the path-related stuff is here - mangling names, versions, dirs, loading resources and dealing with uris.

Author:

Anil K. Vijendran, Harish Prabandham, Pierre Delisle, Costin Manolache, Kin-man Chung

Field Summary

protected org.apache.commons.logging.Log

log

Constructor Summary

JspCompilationContext(java.lang.String jspUri, boolean isErrPage, Options options, javax.servlet.ServletContext context, JspServletWrapper jsw, JspRuntimeContext rctxt)

JspCompilationContext(java.lang.String tagfile, javax.servlet.jsp.tagext.TagInfo tagInfo, Options options, javax.servlet.ServletContext context, JspServletWrapper jsw, JspRuntimeContext rctxt, java.net.URL tagFileJarUrl)

Method Summary

void	compile()
Compiler	createCompiler() Create a "Compiler" object based on some init param data.
java.lang.String	getClassFileName()
java.lang.ClassLoader	getClassLoader() What class loader to use for loading classes while compiling this JSP?
java.lang.String	getClassPath() The classpath that is passed off to the Java compiler.
Compiler	getCompiler()
java.lang.String	getContentType() Get the content type of this JSP.
java.lang.String	getJavaPath() Path of the Java file relative to the work directory.
java.lang.String	getJspFile() Path of the JSP URI.
java.lang.ClassLoader	getJspLoader()
Options	getOptions() Get hold of the Options object for this context.
java.lang.String	getOutputDir() The output directory to generate code into.
java.lang.String	getRealPath(java.lang.String path) Gets the actual path of a URI relative to the context of the compilation.
java.net.URL	getResource(java.lang.String res)
java.io.InputStream	getResourceAsStream(java.lang.String res) Gets a resource as a stream, relative to the meanings of this context's implementation.
java.util.Set	getResourcePaths(java.lang.String path)
JspRuntimeContext	getRuntimeContext()
java.lang.String	getServletClassName() Just the class name (does not include package name) of the generated class.
javax.servlet.ServletContext	getServletContext()
java.lang.String	getServletJavaFileName() Full path name of the Java file into which the servlet is being generated.
java.lang.String	getServletPackageName() Package name for the generated class is make up of the base package name, which is user settable, and the derived package name.
java.net.URL	getTagFileJarUrl() Returns the JAR file in which the tag file for which this JspCompilationContext was created is packaged, or null if this JspCompilationContext does not correspond to a tag file, or if the corresponding tag file is not packaged in a JAR.
java.util.Hashtable	getTagFileJarUrls() Returns the tag-file-name-to-JAR-file map of this compilation unit, which maps tag file names to the JAR files in which the tag files are packaged.
javax.servlet.jsp.tagext.TagInfo	getTagInfo()
java.lang.String[]	getTldLocation(java.lang.String uri) Gets the 'location' of the TLD associated with the given taglib 'uri'.
ServletWriter	getWriter() Where is the servlet being generated?
void	incrementRemoved()
boolean	isErrorPage() Are we processing something that has been declared as an errorpage?
boolean	isPrototypeMode() True if we are compiling a tag file in prototype mode.
boolean	isRemoved()
boolean	isTagFile()
boolean	keepGenerated() Are we keeping generated code around?
java.lang.Class	load()
java.lang.String	resolveRelativeUri(java.lang.String uri) Get the full value of a URI relative to this compilations context uses current file as the base.
void	setClassLoader(java.net.URLClassLoader loader)
void	setClassPath(java.lang.String classPath) The classpath that is passed off to the Java compiler.
void	setContentType(java.lang.String contentType)
void	setErrorPage(boolean isErrPage)
void	setPrototypeMode(boolean pm)
void	setServletClassName(java.lang.String className)
void	setServletJavaFileName(java.lang.String servletJavaFileName)
void	setServletPackageName(java.lang.String servletPackageName) The package name into which the servlet class is generated.
void	setTagInfo(javax.servlet.jsp.tagext.TagInfo tagi)
void	setWriter(ServletWriter writer)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected org.apache.commons.logging.Log log

Constructor Detail

JspCompilationContext

public JspCompilationContext(java.lang.String jspUri,
                             boolean isErrPage,
                             Options options,
                             javax.servlet.ServletContext context,
                             JspServletWrapper jsw,
                             JspRuntimeContext rctxt)

JspCompilationContext

public JspCompilationContext(java.lang.String tagfile,
                             javax.servlet.jsp.tagext.TagInfo tagInfo,
                             Options options,
                             javax.servlet.ServletContext context,
                             JspServletWrapper jsw,
                             JspRuntimeContext rctxt,
                             java.net.URL tagFileJarUrl)

Method Detail

getClassPath

public java.lang.String getClassPath()

The classpath that is passed off to the Java compiler.

setClassPath

public void setClassPath(java.lang.String classPath)

The classpath that is passed off to the Java compiler.

getClassLoader

public java.lang.ClassLoader getClassLoader()

What class loader to use for loading classes while compiling this JSP?

setClassLoader

public void setClassLoader(java.net.URLClassLoader loader)

getJspLoader

public java.lang.ClassLoader getJspLoader()

getOutputDir

public java.lang.String getOutputDir()

The output directory to generate code into. The output directory is make up of the scratch directory, which is provide in Options, plus the directory derived from the package name.

createCompiler

public Compiler createCompiler()
                        throws JasperException

Create a "Compiler" object based on some init param data. This is not done yet. Right now we're just hardcoding the actual compilers that are created.

Throws:

JasperException

getCompiler

public Compiler getCompiler()

resolveRelativeUri

public java.lang.String resolveRelativeUri(java.lang.String uri)

Get the full value of a URI relative to this compilations context uses current file as the base.

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String res)

Gets a resource as a stream, relative to the meanings of this context's implementation.

Returns:

a null if the resource cannot be found or represented as an InputStream.

getResource

public java.net.URL getResource(java.lang.String res)
                         throws java.net.MalformedURLException

Throws:

java.net.MalformedURLException

getResourcePaths

public java.util.Set getResourcePaths(java.lang.String path)

getRealPath

public java.lang.String getRealPath(java.lang.String path)

Gets the actual path of a URI relative to the context of the compilation.

getTagFileJarUrls

public java.util.Hashtable getTagFileJarUrls()

Returns the tag-file-name-to-JAR-file map of this compilation unit, which maps tag file names to the JAR files in which the tag files are packaged. The map is populated when parsing the tag-file elements of the TLDs of any imported taglibs.

getTagFileJarUrl

public java.net.URL getTagFileJarUrl()

Returns the JAR file in which the tag file for which this JspCompilationContext was created is packaged, or null if this JspCompilationContext does not correspond to a tag file, or if the corresponding tag file is not packaged in a JAR.

getServletClassName

public java.lang.String getServletClassName()

Just the class name (does not include package name) of the generated class.

setServletClassName

public void setServletClassName(java.lang.String className)

getJspFile

public java.lang.String getJspFile()

Path of the JSP URI. Note that this is not a file name. This is the context rooted URI of the JSP file.

isErrorPage

public boolean isErrorPage()

Are we processing something that has been declared as an errorpage?

setErrorPage

public void setErrorPage(boolean isErrPage)

isTagFile

public boolean isTagFile()

getTagInfo

public javax.servlet.jsp.tagext.TagInfo getTagInfo()

setTagInfo

public void setTagInfo(javax.servlet.jsp.tagext.TagInfo tagi)

isPrototypeMode

public boolean isPrototypeMode()

True if we are compiling a tag file in prototype mode. ie we only generate codes with class for the tag handler with empty method bodies.

setPrototypeMode

public void setPrototypeMode(boolean pm)

getServletPackageName

public java.lang.String getServletPackageName()

Package name for the generated class is make up of the base package name, which is user settable, and the derived package name. The derived package name directly mirrors the file heirachy of the JSP page.

setServletPackageName

public void setServletPackageName(java.lang.String servletPackageName)

The package name into which the servlet class is generated.

getServletJavaFileName

public java.lang.String getServletJavaFileName()

Full path name of the Java file into which the servlet is being generated.

setServletJavaFileName

public void setServletJavaFileName(java.lang.String servletJavaFileName)

getOptions

public Options getOptions()

Get hold of the Options object for this context.

getServletContext

public javax.servlet.ServletContext getServletContext()

getRuntimeContext

public JspRuntimeContext getRuntimeContext()

getJavaPath

public java.lang.String getJavaPath()

Path of the Java file relative to the work directory.

getClassFileName

public java.lang.String getClassFileName()

getContentType

public java.lang.String getContentType()

Get the content type of this JSP. Content type includes content type and encoding.

setContentType

public void setContentType(java.lang.String contentType)

getWriter

public ServletWriter getWriter()

Where is the servlet being generated?

setWriter

public void setWriter(ServletWriter writer)

getTldLocation

public java.lang.String[] getTldLocation(java.lang.String uri)
                                  throws JasperException

Gets the 'location' of the TLD associated with the given taglib 'uri'.

Returns:

An array of two Strings: The first element denotes the real path to the TLD. If the path to the TLD points to a jar file, then the second element denotes the name of the TLD entry in the jar file. Returns null if the given uri is not associated with any tag library 'exposed' in the web application.

Throws:

JasperException

keepGenerated

public boolean keepGenerated()

Are we keeping generated code around?

incrementRemoved

public void incrementRemoved()

isRemoved

public boolean isRemoved()

compile

public void compile()
             throws JasperException,
                    java.io.FileNotFoundException

Throws:

JasperException

java.io.FileNotFoundException

load

public java.lang.Class load()
                     throws JasperException,
                            java.io.FileNotFoundException

Throws:

JasperException

java.io.FileNotFoundException