Examples of javax.tools.FileObject

javax.tools.FileObject
File abstraction for tools. In this context, file means an abstraction of regular files and other sources of data. For example, a file object can be used to represent regular files, memory cache, or data in databases.
All methods in this interface might throw a SecurityException if a security exception occurs.
Unless explicitly allowed, all methods in this interface might throw a NullPointerException if given a {@code null} argument. @author Peter von der Ahé @author Jonathan Gibbons @since 1.6

        try {
            Map<String, Object> model = new HashMap<>();
            model.put("modules", modules);
            model.put("properties", gwtConfigProps);


            FileObject sourceFile = filer.createResource(StandardLocation.SOURCE_OUTPUT, MODULE_PACKAGENAME,
                    MODULE_PRODUCT_FILENAME);
            OutputStream output = sourceFile.openOutputStream();
            new TemplateProcessor().process(MODULE_PRODUCT_TEMPLATE, model, output);
            output.flush();
            output.close();
        } catch (IOException e) {
            throw new RuntimeException("Failed to create file", e);

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        try {
            Map<String, Object> model = new HashMap<>();
            model.put("modules", modules);
            model.put("properties", gwtConfigProps);


            FileObject sourceFile = filer.createResource(StandardLocation.SOURCE_OUTPUT, MODULE_PACKAGENAME,
                    MODULE_PRODUCT_DEV_FILENAME);
            OutputStream output = sourceFile.openOutputStream();
            new TemplateProcessor().process(MODULE_PRODUCT_DEV_TEMPLATE, model, output);
            output.flush();
            output.close();
        } catch (IOException e) {
            throw new RuntimeException("Failed to create file", e);

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            Map<String, Object> model = new HashMap<>();
            model.put("devHost", devHost);
            model.put("devPort", devPort);


            FileObject sourceFile = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "gwt-proxy.properties");
            OutputStream output1 = sourceFile.openOutputStream();


            FileObject sourceFile2 = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "upload-proxy.properties");
            OutputStream output2 = sourceFile2.openOutputStream();


            FileObject sourceFile3 = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "logout.properties");
            OutputStream output3 = sourceFile3.openOutputStream();


            new TemplateProcessor().process("gwt.proxy.tmpl", model, output1);
            new TemplateProcessor().process("gwt.proxy.upload.tmpl", model, output2);
            new TemplateProcessor().process("gwt.proxy.logout.tmpl", model, output3);

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        try {
            Map<String, Object> model = new HashMap<>();
            model.put("modules", inheritFrom);
            model.put("properties", properties);


            FileObject sourceFile = filer.createResource(StandardLocation.SOURCE_OUTPUT, MODULE_PACKAGE, filename);
            OutputStream output = sourceFile.openOutputStream();
            new TemplateProcessor().process(template, model, output);
            output.flush();
            output.close();
            System.out.println("Written GWT module to " + sourceFile.toUri().toString());
        } catch (IOException e) {
            throw new RuntimeException("Failed to create file", e);
        }
    }

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            Map<String, Object> model = new HashMap<>();
            model.put("devHost", devHost);
            model.put("devPort", devPort);


            FileObject sourceFile = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "gwt-proxy.properties");
            OutputStream output1 = sourceFile.openOutputStream();


            FileObject sourceFile2 = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "upload-proxy.properties");
            OutputStream output2 = sourceFile2.openOutputStream();


            FileObject sourceFile3 = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "patch-proxy.properties");
            OutputStream output3 = sourceFile3.openOutputStream();


            FileObject sourceFile4 = filer.createResource(
                    StandardLocation.SOURCE_OUTPUT, "", "logout.properties");
            OutputStream output4 = sourceFile4.openOutputStream();


            new TemplateProcessor().process("gwt.proxy.tmpl", model, output1);
            new TemplateProcessor().process("gwt.proxy.upload.tmpl", model, output2);
            new TemplateProcessor().process("gwt.proxy.patch.tmpl", model, output3);
            new TemplateProcessor().process("gwt.proxy.logout.tmpl", model, output4);

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      for (Element e : allKnownElements) {
        builder.append(e.toString()).append('\n');
      }


      try {
        final FileObject fo = processingEnv.getFiler().createResource(
                StandardLocation.CLASS_OUTPUT,
                "",
                "classlist.mf",
                null);


        Writer writer = fo.openWriter();
        writer.write(builder.toString());
        writer.close();
      }
      catch (IOException e) {
        e.printStackTrace();

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  private InputStream getInputStreamForResource(String resource) {
    String pkg = getPackage( resource );
    String name = getRelativeName( resource );
    InputStream ormStream;
    try {
      FileObject fileObject = context.getProcessingEnvironment()
          .getFiler()
          .getResource( StandardLocation.CLASS_OUTPUT, pkg, name );
      ormStream = fileObject.openInputStream();
    }
    catch ( IOException e1 ) {
      // TODO - METAGEN-12
      // unfortunately, the Filer.getResource API seems not to be able to load from /META-INF. One gets a
      // FilerException with the message with "Illegal name /META-INF". This means that we have to revert to

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  public static void writeFile(MetaEntity entity, Context context) {
    try {
      String metaModelPackage = entity.getPackageName();
      StringBuffer body = generateBody( entity, context );


      FileObject fo = context.getProcessingEnvironment().getFiler().createSourceFile(
          getFullyQualifiedClassName( entity, metaModelPackage )
      );
      OutputStream os = fo.openOutputStream();
      PrintWriter pw = new PrintWriter( os );


      if ( !metaModelPackage.isEmpty() ) {
        pw.println( "package " + metaModelPackage + ";" );
        pw.println();

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      String resourceFile = SERVICE_DIR + providerInterface;
      log("Working on resource file: " + resourceFile);
      try {
        Set<String> allServices = new HashSet<String>();
        try {
          FileObject existingFile = filer.getResource(StandardLocation.CLASS_OUTPUT, "",
              resourceFile);
          log("Looking for existing resource file at " + existingFile.toUri());
          Set<String> oldServices = ServicesFile.readServiceFile(existingFile.openInputStream());
          log("Existing service entries: " + oldServices);
          allServices.addAll(oldServices);
        } catch (IOException e) {
          log("Resource file did not already exist.");
        }


        Set<String> newServices = new HashSet<String>(providers.get(providerInterface));
        if (allServices.containsAll(newServices)) {
          log("No new service entries being added.");
          return;
        }


        allServices.addAll(newServices);
        log("New service file contents: " + allServices);
        FileObject fileObject = filer.createResource(StandardLocation.CLASS_OUTPUT, "",
            resourceFile);
        OutputStream out = fileObject.openOutputStream();
        ServicesFile.writeServiceFile(allServices, out);
        out.close();
        log("Wrote to: " + fileObject.toUri());
      } catch (IOException e) {
        fatalError("Unable to create " + resourceFile + ", " + e);
        return;
      }
    }

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    return true;
  }


  private void loadCallbacksConfigWriter() {
    try {
      FileObject existingFile = processingEnv.getFiler().getResource(
          StandardLocation.CLASS_OUTPUT, "", CALLBACKS_CONFIG_FILE);
      InputStream inputStream = null;
      if (existingFile != null) {
        try {
          inputStream = existingFile.openInputStream();
        } catch (IOException e) {
        }
      }
      callbacksConfigWriter = new DatastoreCallbacksConfigWriter(inputStream);
      if (inputStream != null) {

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