Beispiel #1
0
  /** Compile the jsp file into equivalent servlet in java source */
  private void generateJava() throws Exception {

    long t1, t2, t3, t4;
    t1 = t2 = t3 = t4 = 0;

    if (log.isLoggable(Level.FINE)) {
      t1 = System.currentTimeMillis();
    }

    // Setup page info area
    pageInfo =
        new PageInfo(new BeanRepository(ctxt.getClassLoader(), errDispatcher), ctxt.getJspFile());

    JspConfig jspConfig = options.getJspConfig();
    JspProperty jspProperty = jspConfig.findJspProperty(ctxt.getJspFile());

    /*
     * If the current uri is matched by a pattern specified in
     * a jsp-property-group in web.xml, initialize pageInfo with
     * those properties.
     */
    pageInfo.setELIgnored(JspUtil.booleanValue(jspProperty.isELIgnored()));
    pageInfo.setScriptingInvalid(JspUtil.booleanValue(jspProperty.isScriptingInvalid()));
    pageInfo.setTrimDirectiveWhitespaces(JspUtil.booleanValue(jspProperty.getTrimSpaces()));
    pageInfo.setDeferredSyntaxAllowedAsLiteral(JspUtil.booleanValue(jspProperty.getPoundAllowed()));
    pageInfo.setErrorOnUndeclaredNamespace(
        JspUtil.booleanValue(jspProperty.errorOnUndeclaredNamespace()));

    if (jspProperty.getIncludePrelude() != null) {
      pageInfo.setIncludePrelude(jspProperty.getIncludePrelude());
    }
    if (jspProperty.getIncludeCoda() != null) {
      pageInfo.setIncludeCoda(jspProperty.getIncludeCoda());
    }
    if (options.isDefaultBufferNone() && pageInfo.getBufferValue() == null) {
      // Set to unbuffered if not specified explicitly
      pageInfo.setBuffer(0);
    }

    String javaFileName = ctxt.getServletJavaFileName();
    ServletWriter writer = null;

    try {
      // Setup the ServletWriter
      Writer javaWriter =
          javaCompiler.getJavaWriter(javaFileName, ctxt.getOptions().getJavaEncoding());
      writer = new ServletWriter(new PrintWriter(javaWriter));
      ctxt.setWriter(writer);

      // Reset the temporary variable counter for the generator.
      JspUtil.resetTemporaryVariableName();

      // Parse the file
      ParserController parserCtl = new ParserController(ctxt, this);
      pageNodes = parserCtl.parse(ctxt.getJspFile());

      if (ctxt.isPrototypeMode()) {
        // generate prototype .java file for the tag file
        Generator.generate(writer, this, pageNodes);
        writer.close();
        writer = null;
        return;
      }

      // Validate and process attributes
      Validator.validate(this, pageNodes);

      if (log.isLoggable(Level.FINE)) {
        t2 = System.currentTimeMillis();
      }

      // Collect page info
      Collector.collect(this, pageNodes);

      // Compile (if necessary) and load the tag files referenced in
      // this compilation unit.
      tfp = new TagFileProcessor();
      tfp.loadTagFiles(this, pageNodes);

      if (log.isLoggable(Level.FINE)) {
        t3 = System.currentTimeMillis();
      }

      // Determine which custom tag needs to declare which scripting vars
      ScriptingVariabler.set(pageNodes, errDispatcher);

      // Optimizations by Tag Plugins
      TagPluginManager tagPluginManager = options.getTagPluginManager();
      tagPluginManager.apply(pageNodes, errDispatcher, pageInfo);

      // Optimization: concatenate contiguous template texts.
      TextOptimizer.concatenate(this, pageNodes);

      // Generate static function mapper codes.
      ELFunctionMapper.map(this, pageNodes);

      // generate servlet .java file
      Generator.generate(writer, this, pageNodes);
      writer.close();
      writer = null;

      // The writer is only used during the compile, dereference
      // it in the JspCompilationContext when done to allow it
      // to be GC'd and save memory.
      ctxt.setWriter(null);

      if (log.isLoggable(Level.FINE)) {
        t4 = System.currentTimeMillis();
        log.fine(
            "Generated "
                + javaFileName
                + " total="
                + (t4 - t1)
                + " generate="
                + (t4 - t3)
                + " validate="
                + (t2 - t1));
      }

    } catch (Exception e) {
      if (writer != null) {
        try {
          writer.close();
          writer = null;
        } catch (Exception e1) {
          // do nothing
        }
      }
      // Remove the generated .java file
      javaCompiler.doJavaFile(false);
      throw e;
    } finally {
      if (writer != null) {
        try {
          writer.close();
        } catch (Exception e2) {
          // do nothing
        }
      }
    }

    // JSR45 Support
    if (!options.isSmapSuppressed()) {
      smapUtil.generateSmap(pageNodes);
    }

    // If any proto type .java and .class files was generated,
    // the prototype .java may have been replaced by the current
    // compilation (if the tag file is self referencing), but the
    // .class file need to be removed, to make sure that javac would
    // generate .class again from the new .java file just generated.
    tfp.removeProtoTypeFiles(ctxt.getClassFileName());
  }
  /**
   * Compile the jsp file into equivalent servlet in .java file
   *
   * @return a smap for the current JSP page, if one is generated, null otherwise
   */
  protected String[] generateJava() throws Exception {

    String[] smapStr = null;

    long t1, t2, t3, t4;

    t1 = t2 = t3 = t4 = 0;

    if (log.isDebugEnabled()) {
      t1 = System.currentTimeMillis();
    }

    // Setup page info area
    pageInfo =
        new PageInfo(new BeanRepository(ctxt.getClassLoader(), errDispatcher), ctxt.getJspFile());

    JspConfig jspConfig = options.getJspConfig();
    JspConfig.JspProperty jspProperty = jspConfig.findJspProperty(ctxt.getJspFile());

    /*
     * If the current uri is matched by a pattern specified in a
     * jsp-property-group in web.xml, initialize pageInfo with those
     * properties.
     */
    if (jspProperty.isELIgnored() != null) {
      pageInfo.setELIgnored(JspUtil.booleanValue(jspProperty.isELIgnored()));
    }
    if (jspProperty.isScriptingInvalid() != null) {
      pageInfo.setScriptingInvalid(JspUtil.booleanValue(jspProperty.isScriptingInvalid()));
    }
    if (jspProperty.getIncludePrelude() != null) {
      pageInfo.setIncludePrelude(jspProperty.getIncludePrelude());
    }
    if (jspProperty.getIncludeCoda() != null) {
      pageInfo.setIncludeCoda(jspProperty.getIncludeCoda());
    }
    if (jspProperty.isDeferedSyntaxAllowedAsLiteral() != null) {
      pageInfo.setDeferredSyntaxAllowedAsLiteral(
          JspUtil.booleanValue(jspProperty.isDeferedSyntaxAllowedAsLiteral()));
    }
    if (jspProperty.isTrimDirectiveWhitespaces() != null) {
      pageInfo.setTrimDirectiveWhitespaces(
          JspUtil.booleanValue(jspProperty.isTrimDirectiveWhitespaces()));
    }
    // Default ContentType processing is deferred until after the page has
    // been parsed
    if (jspProperty.getBuffer() != null) {
      pageInfo.setBufferValue(jspProperty.getBuffer(), null, errDispatcher);
    }
    if (jspProperty.isErrorOnUndeclaredNamespace() != null) {
      pageInfo.setErrorOnUndeclaredNamespace(
          JspUtil.booleanValue(jspProperty.isErrorOnUndeclaredNamespace()));
    }
    if (ctxt.isTagFile()) {
      try {
        double libraryVersion =
            Double.parseDouble(ctxt.getTagInfo().getTagLibrary().getRequiredVersion());
        if (libraryVersion < 2.0) {
          pageInfo.setIsELIgnored("true", null, errDispatcher, true);
        }
        if (libraryVersion < 2.1) {
          pageInfo.setDeferredSyntaxAllowedAsLiteral("true", null, errDispatcher, true);
        }
      } catch (NumberFormatException ex) {
        errDispatcher.jspError(ex);
      }
    }

    ctxt.checkOutputDir();
    String javaFileName = ctxt.getServletJavaFileName();

    ServletWriter writer = null;
    try {
      /*
       * The setting of isELIgnored changes the behaviour of the parser
       * in subtle ways. To add to the 'fun', isELIgnored can be set in
       * any file that forms part of the translation unit so setting it
       * in a file included towards the end of the translation unit can
       * change how the parser should have behaved when parsing content
       * up to the point where isELIgnored was set. Arghh!
       * Previous attempts to hack around this have only provided partial
       * solutions. We now use two passes to parse the translation unit.
       * The first just parses the directives and the second parses the
       * whole translation unit once we know how isELIgnored has been set.
       * TODO There are some possible optimisations of this process.
       */
      // Parse the file
      ParserController parserCtl = new ParserController(ctxt, this);

      // Pass 1 - the directives
      Node.Nodes directives = parserCtl.parseDirectives(ctxt.getJspFile());
      Validator.validateDirectives(this, directives);

      // Pass 2 - the whole translation unit
      pageNodes = parserCtl.parse(ctxt.getJspFile());

      // Leave this until now since it can only be set once - bug 49726
      if (pageInfo.getContentType() == null && jspProperty.getDefaultContentType() != null) {
        pageInfo.setContentType(jspProperty.getDefaultContentType());
      }

      if (ctxt.isPrototypeMode()) {
        // generate prototype .java file for the tag file
        writer = setupContextWriter(javaFileName);
        Generator.generate(writer, this, pageNodes);
        writer.close();
        writer = null;
        return null;
      }

      // Validate and process attributes - don't re-validate the
      // directives we validated in pass 1
      Validator.validateExDirectives(this, pageNodes);

      if (log.isDebugEnabled()) {
        t2 = System.currentTimeMillis();
      }

      // Collect page info
      Collector.collect(this, pageNodes);

      // Compile (if necessary) and load the tag files referenced in
      // this compilation unit.
      tfp = new TagFileProcessor();
      tfp.loadTagFiles(this, pageNodes);

      if (log.isDebugEnabled()) {
        t3 = System.currentTimeMillis();
      }

      // Determine which custom tag needs to declare which scripting vars
      ScriptingVariabler.set(pageNodes, errDispatcher);

      // Optimizations by Tag Plugins
      TagPluginManager tagPluginManager = options.getTagPluginManager();
      tagPluginManager.apply(pageNodes, errDispatcher, pageInfo);

      // Optimization: concatenate contiguous template texts.
      TextOptimizer.concatenate(this, pageNodes);

      // Generate static function mapper codes.
      ELFunctionMapper.map(pageNodes);

      // generate servlet .java file
      writer = setupContextWriter(javaFileName);
      Generator.generate(writer, this, pageNodes);
      writer.close();
      writer = null;

      // The writer is only used during the compile, dereference
      // it in the JspCompilationContext when done to allow it
      // to be GC'd and save memory.
      ctxt.setWriter(null);

      if (log.isDebugEnabled()) {
        t4 = System.currentTimeMillis();
        log.debug(
            "Generated "
                + javaFileName
                + " total="
                + (t4 - t1)
                + " generate="
                + (t4 - t3)
                + " validate="
                + (t2 - t1));
      }

    } catch (Exception e) {
      if (writer != null) {
        try {
          writer.close();
          writer = null;
        } catch (Exception e1) {
          // do nothing
        }
      }
      // Remove the generated .java file
      File file = new File(javaFileName);
      if (file.exists()) {
        if (!file.delete()) {
          log.warn(
              Localizer.getMessage(
                  "jsp.warning.compiler.javafile.delete.fail", file.getAbsolutePath()));
        }
      }
      throw e;
    } finally {
      if (writer != null) {
        try {
          writer.close();
        } catch (Exception e2) {
          // do nothing
        }
      }
    }

    // JSR45 Support
    if (!options.isSmapSuppressed()) {
      smapStr = SmapUtil.generateSmap(ctxt, pageNodes);
    }

    // If any proto type .java and .class files was generated,
    // the prototype .java may have been replaced by the current
    // compilation (if the tag file is self referencing), but the
    // .class file need to be removed, to make sure that javac would
    // generate .class again from the new .java file just generated.
    tfp.removeProtoTypeFiles(ctxt.getClassFileName());

    return smapStr;
  }