Examples of org.apache.jasper.JspCompilationContext

org.apache.jasper.JspCompilationContext
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 @author Harish Prabandham @author Pierre Delisle @author Costin Manolache @author Kin-man Chung

        }
        
        Object [] wrappers = jsps.values().toArray();
        for (int i = 0; i < wrappers.length; i++ ) {
            JspServletWrapper jsw = (JspServletWrapper)wrappers[i];
            JspCompilationContext ctxt = jsw.getJspEngineContext();
            // JspServletWrapper also synchronizes on this when
            // it detects it has to do a reload
            synchronized(jsw) {
                try {
                    ctxt.compile();
                } catch (FileNotFoundException ex) {
                    ctxt.incrementRemoved();
                } catch (Throwable t) {
                    jsw.getServletContext().log(MESSAGES.backgroundCompilationFailed(), t);
                }
            }
        }

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            tagFileJarPath = "";
        } else {
            tagFileJarPath = tagFileJarUrl.toString();
        }


        JspCompilationContext ctxt = compiler.getCompilationContext();
        JspRuntimeContext rctxt = ctxt.getRuntimeContext();
        JspServletWrapper wrapper = rctxt.getWrapper(tagFileJarPath + tagFilePath);


        synchronized (rctxt) {
            if (wrapper == null) {
                wrapper = new JspServletWrapper(ctxt.getServletContext(), ctxt
                        .getOptions(), tagFilePath, tagInfo, ctxt
                        .getRuntimeContext(), tagFileJarUrl);
                rctxt.addWrapper(tagFileJarPath + tagFilePath, wrapper);


                // Use same classloader and classpath for compiling tag files
                wrapper.getJspEngineContext().setClassLoader(ctxt.getClassLoader());
                wrapper.getJspEngineContext().setClassPath(ctxt.getClassPath());
            } else {
                // Make sure that JspCompilationContext gets the latest TagInfo
                // for the tag file. TagInfo instance was created the last
                // time the tag file was scanned for directives, and the tag
                // file may have been modified since then.
                wrapper.getJspEngineContext().setTagInfo(tagInfo);
            }


            Class tagClazz;
            int tripCount = wrapper.incTripCount();
            try {
                if (tripCount > 0) {
                    // When tripCount is greater than zero, a circular
                    // dependency exists. The circularily dependant tag
                    // file is compiled in prototype mode, to avoid infinite
                    // recursion.


                    JspServletWrapper tempWrapper = new JspServletWrapper(ctxt
                            .getServletContext(), ctxt.getOptions(),
                            tagFilePath, tagInfo, ctxt.getRuntimeContext(),
                            ctxt.getTagFileJarUrl(tagFilePath));
                    // Use same classloader and classpath for compiling tag files
                    tempWrapper.getJspEngineContext().setClassLoader(ctxt.getClassLoader());
                    tempWrapper.getJspEngineContext().setClassPath(ctxt.getClassPath());
                    tagClazz = tempWrapper.loadTagFilePrototype();
                    tempVector.add(tempWrapper.getJspEngineContext()
                            .getCompiler());
                } else {
                    tagClazz = wrapper.loadTagFile();

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   * Constructor
   */
  DirectiveVisitor(Compiler compiler) throws JasperException {
      this.pageInfo = compiler.getPageInfo();
      this.err = compiler.getErrorDispatcher();
      JspCompilationContext ctxt = compiler.getCompilationContext();
  }

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    private Class loadTagFile(Compiler compiler,
                              String tagFilePath, TagInfo tagInfo,
                              PageInfo parentPageInfo)
        throws JasperException {


        JspCompilationContext ctxt = compiler.getCompilationContext();
        JspRuntimeContext rctxt = ctxt.getRuntimeContext();
        JspServletWrapper wrapper =
                (JspServletWrapper) rctxt.getWrapper(tagFilePath);


        synchronized(rctxt) {
            if (wrapper == null) {
                wrapper = new JspServletWrapper(ctxt.getServletContext(),
                                                ctxt.getOptions(),
                                                tagFilePath,
                                                tagInfo,
                                                ctxt.getRuntimeContext(),
                                                (URL) ctxt.getTagFileJarUrls().get(tagFilePath));
                    rctxt.addWrapper(tagFilePath,wrapper);


    // Use same classloader and classpath for compiling tag files
    wrapper.getJspEngineContext().setClassLoader(
        (URLClassLoader) ctxt.getClassLoader());
    wrapper.getJspEngineContext().setClassPath(ctxt.getClassPath());
            }


            Class tagClazz;
            int tripCount = wrapper.incTripCount();
            try {
                if (tripCount > 0) {
                    // When tripCount is greater than zero, a circular
                    // dependency exists.  The circularily dependant tag
                    // file is compiled in prototype mode, to avoid infinite
                    // recursion.


                    JspServletWrapper tempWrapper
                        = new JspServletWrapper(ctxt.getServletContext(),
                                                ctxt.getOptions(),
                                                tagFilePath,
                                                tagInfo,
                                                ctxt.getRuntimeContext(),
                                                (URL) ctxt.getTagFileJarUrls().get(tagFilePath));
                    tagClazz = tempWrapper.loadTagFilePrototype();
                    tempVector.add(
                               tempWrapper.getJspEngineContext().getCompiler());
                } else {
                    tagClazz = wrapper.loadTagFile();

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        public void visit(Node.CustomTag n) throws JasperException {
            TagFileInfo tagFileInfo = n.getTagFileInfo();
            if (tagFileInfo != null) {
                String tagFilePath = tagFileInfo.getPath();
    JspCompilationContext ctxt = compiler.getCompilationContext();
    if (ctxt.getTagFileJarUrls().get(tagFilePath) == null) {
        // Omit tag file dependency info on jar files for now.
                    pageInfo.addDependant(tagFilePath);
    }
                Class c = loadTagFile(compiler, tagFilePath, n.getTagInfo(),
                                      pageInfo);

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     */
    private void checkCompile() {
        Object [] wrappers = jsps.values().toArray();
        for (int i = 0; i < wrappers.length; i++ ) {
            JspServletWrapper jsw = (JspServletWrapper)wrappers[i];
            JspCompilationContext ctxt = jsw.getJspEngineContext();
            // JspServletWrapper also synchronizes on this when
            // it detects it has to do a reload
            synchronized(jsw) {
                try {
                    ctxt.compile();
                } catch (FileNotFoundException ex) {
                    ctxt.incrementRemoved();
                } catch (Throwable t) {
                    jsw.getServletContext().log("Background compile failed",
            t);
                }
            }

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  this.isTagFile = false;
        this.config = config;
        this.options = options;
        this.jspUri = jspUri;
        ctxt = new JspCompilationContext(jspUri, isErrorPage, options,
           config.getServletContext(),
           this, rctxt);
    }

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  this.isTagFile = true;
        this.config = null;  // not used
        this.options = options;
  this.jspUri = tagFilePath;
  this.tripCount = 0;
        ctxt = new JspCompilationContext(jspUri, tagInfo, options,
           servletContext, this, rctxt,
           tagFileJarUrl);
    }

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  this.isTagFile = false;
        this.config = config;
        this.options = options;
        this.jspUri = jspUri;
        ctxt = new JspCompilationContext(jspUri, isErrorPage, options,
           config.getServletContext(),
           this, rctxt);
    }

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  this.isTagFile = true;
        this.config = null;  // not used
        this.options = options;
  this.jspUri = tagFilePath;
  this.tripCount = 0;
        ctxt = new JspCompilationContext(jspUri, tagInfo, options,
           servletContext, this, rctxt,
           tagFileJarUrl);
    }

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