Examples of groovy.text.SimpleTemplateEngine$SimpleTemplate

groovy.text.SimpleTemplateEngine
Processes template source files substituting variables and expressions into placeholders in a template source text to produce the desired output.
The template engine uses JSP style <% %> script and <%= %> expression syntax or GString style expressions. The variable 'out' is bound to the writer that the template is being written to.
Frequently, the template source will be in a file but here is a simple example providing the template as a string:
```
 def binding = [ firstname : "Grace", lastname  : "Hopper", accepted  : true, title     : 'Groovy for COBOL programmers' ] def engine = new groovy.text.SimpleTemplateEngine() def text = '''\ Dear <%= firstname %> $lastname, We <% if (accepted) print 'are pleased' else print 'regret' %> \ to inform you that your paper entitled '$title' was ${ accepted ? 'accepted' : 'rejected' }. The conference committee. ''' def template = engine.createTemplate(text).make(binding) println template.toString() 
```
This example uses a mix of the JSP style and GString style placeholders but you can typically use just one style if you wish. Running this example will produce this output:
```
 Dear Grace Hopper, We are pleased to inform you that your paper entitled 'Groovy for COBOL programmers' was accepted. The conference committee. 
```
The template engine can also be used as the engine for {@link groovy.servlet.TemplateServlet} by placing thefollowing in your web.xml file (plus a corresponding servlet-mapping element):
```
 <servlet> <servlet-name>SimpleTemplate</servlet-name> <servlet-class>groovy.servlet.TemplateServlet</servlet-class> <init-param> <param-name>template.engine</param-name> <param-value>groovy.text.SimpleTemplateEngine</param-value> </init-param> </servlet> 
```
In this case, your template source file should be HTML with the appropriate embedded placeholders. @author sam @author Christian Stein @author Paul King @author Alex Tkachman

    protected Template groovyTemplate() {
        Template groovyTemplate = groovyTemplates.get(getGroovyExpression());


        if (groovyTemplate == null) {
            try {
                groovyTemplate = new SimpleTemplateEngine().createTemplate("${" + getGroovyExpression() + "}");
                groovyTemplates.put(getGroovyExpression(), groovyTemplate);
            } catch (Exception e) {
                logger.log(Level.SEVERE, "problem with groovy expression " + getGroovyExpression(), e);
            }
        }

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                String groovyClosures = new String(IOUtilities.inputStreamToBytes(in));


                cmd = "<% " + groovyClosures + " %>" + cmd;


                // Create Groovy Standard Template
                SimpleTemplateEngine engine = new SimpleTemplateEngine();
                resolvedTemplate = engine.createTemplate(cmd);
            }


            // Do normal Groovy substitutions.
            return resolvedTemplate.make(args).toString();
        }

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     * @return The underlying template engine or <code>null</code> on error.
     */
    protected TemplateEngine initTemplateEngine(ServletConfig config) {
        String name = config.getInitParameter("template.engine");
        if (name == null) {
            return new SimpleTemplateEngine();
        }
        try {
            return (TemplateEngine) Class.forName(name).newInstance();
        } catch (InstantiationException e) {
            log("Could not instantiate template engine: " + name, e);

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                IOUtilities.close(in);


                cmd = "<% " + groovyClosures + " %>" + cmd;


                // Create Groovy Standard Template
                SimpleTemplateEngine engine = new SimpleTemplateEngine();
                resolvedTemplate = engine.createTemplate(cmd);
            }


            // Do normal Groovy substitutions.
            return resolvedTemplate.make(args).toString();
        }

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  }


  public String executeTemplate(final String template, final Map<String, Object> variables)
  {
    securityChecks(template);
    return executeTemplate(new SimpleTemplateEngine(), template, variables);
  }

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            throw new RenderingException(e);
        }
    }


    private Template findTemplate(final String templateName) throws SAXException, ParserConfigurationException, ClassNotFoundException, IOException {
        TemplateEngine ste = templateName.endsWith(".gxml") ? new XmlTemplateEngine() : new SimpleTemplateEngine();
        File sourceTemplate = new File(templatesPath, templateName);
        Template template = cachedTemplates.get(templateName);
        if (template == null) {
            template = ste.createTemplate(new InputStreamReader(new BufferedInputStream(new FileInputStream(sourceTemplate)), config.getString(Keys.TEMPLATE_ENCODING)));
            cachedTemplates.put(templateName, template);

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                String groovyClosures = new String(IOUtilities.inputStreamToBytes(in));


                cmd = "<% " + groovyClosures + " %>" + cmd;


                // Create Groovy Standard Template
                SimpleTemplateEngine engine = new SimpleTemplateEngine();
                resolvedTemplate = engine.createTemplate(cmd);
            }


            // Do normal Groovy substitutions.
            return resolvedTemplate.make(args).toString();
        }

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                String groovyClosures = new String(IOUtilities.inputStreamToBytes(in));


                cmd = "<% " + groovyClosures + " %>" + cmd;


                // Create Groovy Standard Template
                SimpleTemplateEngine engine = new SimpleTemplateEngine();
                resolvedTemplate = engine.createTemplate(cmd);
            }


            // Do normal Groovy substitutions.
            return resolvedTemplate.make(args).toString();
        }

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                String groovyClosures = new String(IOUtilities.inputStreamToBytes(in));


                cmd = "<% " + groovyClosures + " %>" + cmd;


                // Create Groovy Standard Template
                SimpleTemplateEngine engine = new SimpleTemplateEngine();
                resolvedTemplate = engine.createTemplate(cmd);
            }


            // Do normal Groovy substitutions.
            return resolvedTemplate.make(args).toString();
        }

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                IOUtilities.close(in);


                cmd = "<% " + groovyClosures + " %>" + cmd;


                // Create Groovy Standard Template
                SimpleTemplateEngine engine = new SimpleTemplateEngine();
                resolvedTemplate = engine.createTemplate(cmd);
            }


            // Do normal Groovy substitutions.
            return resolvedTemplate.make(args).toString();
        }

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