### Example of String Parameter Usage

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Illustrates the output when using the 'sayHi' helper with string parameters enabled.

```html
{{sayHi this edgar}}

```

--------------------------------

### Example of String Parameter Result

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Shows the resulting string after the 'sayHi' helper is applied with string parameters.

```text
Hello edgar!

```

--------------------------------

### Handlebars Template Example (home.hbs)

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

A simple Handlebars template demonstrating iteration over a list of items.

```handlebars
<ul>
 {{#items}}
 {{name}}
 {{/items}}
</ul>
```

--------------------------------

### Null Cache Implementation Example

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

A basic implementation of a template cache that bypasses caching and directly parses the source.

```java
Template get(TemplateSource source, Parser parser) throws IOException {
  return parser.parse(source);
}

```

--------------------------------

### Handlebars Template Syntax Error Example

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Example of a syntax error in a Handlebars template where an expected token was not found.

```handlebars
{{value
```

--------------------------------

### JSON Data for Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Example JSON data structure to be merged with the home.hbs template.

```json
{
  "items": [
    {
      "name": "Handlebars.java rocks!"
    }
  ]
}
```

--------------------------------

### Precompile Helper Example

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The 'precompile' helper generates JavaScript code from a Handlebars template. It requires the template name as a context.

```html
<script type="text/javascript">
{{precompile "user"}}
</script>
```

--------------------------------

### Register a List Helper using the Helper Interface

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register a helper for processing lists. This example iterates over a list and applies the block helper to each item.

```java
handlebars.registerHelper("blog-list", new Helper<List<Blog>>() {
  public CharSequence apply(List<Blog> list, Options options) {
    String ret = "<ul>";
    for (Blog blog: list) {
      ret += "<li>" + options.fn(blog) + "</li>";
    }
    return new Handlebars.SafeString(ret + "</ul>");
  }
});
```

--------------------------------

### Handlebars.js Scope Resolution Example

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Demonstrates the default scope resolution behavior in Handlebars.js, which does not look up the context stack for missing attributes.

```html
Hello {{#child}}{{value}}{{/child}}
```

--------------------------------

### Handlebars.java Scope Resolution Example

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Illustrates how Handlebars.java resolves scope differently from Handlebars.js by looking up missing attributes in the context stack. Use 'this.' to explicitly refer to the current scope.

```json
{
  "value": "parent",
  "child": {
  }
}
```

```html
Hello {{#child}}{{value}}{{/child}}
```

```html
Hello {{#child}}{{this.value}}{{/child}}
```

--------------------------------

### Generated i18nJs JavaScript Code

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

This is an example of the JavaScript code generated by the 'i18nJs' helper, setting up translations for the I18n.js library.

```javascript
<script type="text/javascript">
  I18n.defaultLocale = 'es_AR';
  I18n.locale = 'es_AR';
  I18n.translations = I18n.translations || {};
  // Spanish (Argentina)
  I18n.translations['es_AR'] = {
    "hello": "Hi {{arg0}}"
  }
</script>
```

--------------------------------

### Use Jackson 1.x JSON Helper in Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Example of using the registered Jackson 1.x JSON helper within a Handlebars template to render a context object as JSON.

```handlebars
 {{json context [view="foo.MyFullyQualifiedClassName"] [escapeHTML=false] [pretty=false]}}
```

--------------------------------

### Use Jackson 1.x JSON Helper with View Alias in Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Example of using the Jackson 1.x JSON helper with a defined view alias in a Handlebars template.

```handlebars
 {{json context [view="myView"] [escapeHTML=false] [pretty=false]}}
```

--------------------------------

### Embedded Helper Example

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The 'embedded' helper allows embedding a Handlebars template directly within an HTML script tag.

```html
<html>
...
{{embedded "user"}}
...
</html>
```

--------------------------------

### Handlebars Partial Not Found Error

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Example of an error message when a Handlebars partial is not found, including the call stack.

```plaintext
/deep1.hbs:1:5: The partial '/deep2.hbs' could not be found
    {{> deep2
        ^
at /deep1.hbs:1:10
at /deep.hbs:1:10
```

--------------------------------

### Initialize Handlebars with a Custom TemplateLoader

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Demonstrates how to create a Handlebars instance with a custom TemplateLoader implementation.

```java
TemplateLoader loader = ...;
Handlebars handlebars = new Handlebars(loader);
```

--------------------------------

### Running the Handlebars.java Server

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Execute the server JAR from the command line, specifying the directory containing your templates.

```bash
java -jar handlebars-proto-${current-version}.jar -dir myTemplates
```

--------------------------------

### Precompile Helper Usage with Wrapper Option

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Illustrates the usage of the 'precompile' helper with an optional 'wrapper' argument to control the output format.

```handlebars
{{precompile "template" [wrapper="anonymous, amd or none"]}}
```

--------------------------------

### Accessing Template with Multiple Data Sources

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Use the 'data' parameter in the URI to test multiple datasets with a single template. The file extension is not required.

```bash
http://localhost:6780/home.hbs?data=mytestdata
```

--------------------------------

### Run Precompile Goal via Maven Command

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-maven-plugin/README.md

Execute the precompile goal directly using the Maven command line.

```bash
mvn handlebars:precompile
```

--------------------------------

### Accessing the Rendered Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Open a web browser and navigate to this URL to view the rendered template.

```bash
http://localhost:6780/home.hbs
```

--------------------------------

### Register JavaScript Helpers from a File

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Load and register JavaScript helpers defined in a specified file. Ensure the file path is correct.

```java
handlebars.registerHelpers(new File("helpers.js"));
```

--------------------------------

### Run i18njs Goal via Maven Command

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-maven-plugin/README.md

Execute the i18njs goal directly using the Maven command line.

```bash
mvn handlebars:i18njs
```

--------------------------------

### Configuring Handlebars.js Version for Precompilation

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Shows how to specify a different version of handlebars.js for the precompilation process in Handlebars.java.

```java
Handlebars handlebars = new Handlebars();
handlebars.handlebarsJsFile("/handlebars-v2.0.0.js");
```

--------------------------------

### Initialize Jasmine Environment

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-maven-plugin/src/test/resources/jasmine/SpecRunner.html

Sets up the Jasmine testing environment, configures the HTML reporter, and defines a spec filter. This code should be included in your SpecRunner.html file to initialize Jasmine.

```javascript
(function() { var jasmineEnv = jasmine.getEnv(); jasmineEnv.updateInterval = 1000; var htmlReporter = new jasmine.HtmlReporter(); jasmineEnv.addReporter(htmlReporter); jasmineEnv.specFilter = function(spec) { return htmlReporter.specFilter(spec); }; var currentWindowOnload = window.onload; window.onload = function() { if (currentWindowOnload) { currentWindowOnload(); } execJasmine(); }; function execJasmine() { jasmineEnv.execute(); } })();
```

--------------------------------

### Compile and Apply Template from Classpath

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

This Java snippet shows how to compile a template named 'mytemplate' located in the classpath and apply it with a given string.

```java
var handlebars = new Handlebars();

var template = handlebars.compile("mytemplate");

System.out.println(template.apply("Handlebars.java"));
```

--------------------------------

### Access Helper Hash Parameters

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Access hash parameters (key-value pairs) passed to a helper using the options.hash() method. This is useful for passing configuration options.

```java
handlebars.registerHelper("blog-list", new Helper<Blog>() {
  public CharSequence apply(List<Blog> list, Options options) {
    String classParam = options.hash("class");
    assertEquals("blog-css", classParam);
    ...
  }
});

handlebars.compileInline("{{#blog-list blogs class=\"blog-css\"}}{{/blog-list}}");
```

--------------------------------

### Using Multiple Value Resolvers

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code demonstrating how to configure Handlebars.java to use multiple value resolvers in a specific order.

```java
Context context = Context
  .newBuilder(model)
  .resolver(
      MapValueResolver.INSTANCE,
      JavaBeanValueResolver.INSTANCE,
      FieldValueResolver.INSTANCE
  ).build();
```

--------------------------------

### Create and Apply a TypeSafeTemplate

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Compile a template inline and cast it to the defined TypeSafeTemplate interface. Set values using setter methods and apply the template.

```java
UserTemplate userTmpl = handlebars.compileInline("{{name}} is {{age}} years old!")
  .as(UserTemplate.class);

userTmpl.setAge(32);

assertEquals("Edgar is 32 years old!", userTmpl.apply(new User("Edgar")));
```

--------------------------------

### Configuring a Custom Template Cache

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Demonstrates how to configure Handlebars.java to use a custom template cache implementation.

```java
Handlebars hbs = new Handlebars()
  .with(new MyCache());

```

--------------------------------

### Accessing Precompiled Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Demonstrates how to access a precompiled Handlebars template in JavaScript.

```js
var template = Handlebars.templates['user']
```

--------------------------------

### Configure TemplateLoader with Prefix and Suffix

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

This Java snippet illustrates configuring a ClassPathTemplateLoader with a custom prefix and suffix to resolve template paths.

```java
TemplateLoader loader = new ClassPathTemplateLoader();
loader.setPrefix("/templates");
loader.setSuffix(".html");
Handlebars handlebars = new Handlebars(loader);

Template template = handlebars.compile("mytemplate");

System.out.println(template.apply("Handlebars.java"));
```

--------------------------------

### i18n Helper with Different Bundle

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Shows how to use the 'i18n' helper with a custom ResourceBundle name, requiring a properties file with that name.

```html
{{i18n "hello" bundle="myMessages"}}
```

--------------------------------

### Access Helper Default Hash Parameters

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Access hash parameters, providing default values if the hash key is not supplied. This simplifies template usage by providing sensible defaults.

```java
handlebars.registerHelper("blog-list", new Helper<Blog>() {
  public CharSequence apply(List<Blog> list, Options options) {
    String class = options.hash("class", "blog-css");
    assertEquals("blog-css", class);
    ...
  }
});

handlebars.compileInline("{{#blog-list blogs}}{{/blog-list}}");
```

--------------------------------

### Access Helper Parameters

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Access parameters passed to a helper using the options.param() method. Parameters are zero-indexed.

```java
handlebars.registerHelper("blog-list", new Helper<Blog>() {
  public CharSequence apply(List<Blog> list, Options options) {
    String p0 = options.param(0);
    assertEquals("param0", p0);
    Integer p1 = options.param(1);
    assertEquals(123, p1);
    ...
  }
});

Bean bean = new Bean();
bean.setParam1(123);

Template template = handlebars.compileInline("{{#blog-list blogs \"param0\" param1}}{{/blog-list}}");
template.apply(bean);
```

--------------------------------

### Register a Helper using the Helper Interface

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register a custom helper by implementing the Helper interface. The apply method defines the helper's logic.

```java
handlebars.registerHelper("blog", new Helper<Blog>() {
  public CharSequence apply(Blog blog, Options options) {
    return options.fn(blog);
  }
});
```

--------------------------------

### YAML Data for Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Alternative YAML data structure for the home.hbs template.

```yaml
items:
  - name: Handlebars.java rocks!
```

--------------------------------

### Extending Context Stack with Custom Data

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code demonstrating how to extend the Handlebars context stack with custom data like user information and other maps.

```java
hookContextStack(Object model, Template template) {
    User user = ....;// Get the logged-in user from somewhere
    Map moreData = ...;
    Context context = Context
      .newBuilder(model)
        .combine("user", user)
        .combine(moreData)
        .build();
    template.apply(context);
    context.destroy();
  }
```

--------------------------------

### Convert Resource Bundles to JavaScript with Maven

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-maven-plugin/README.md

Configure the plugin to convert Java Resource Bundles to JavaScript files for i18n.js. Specify the output directory, bundle name, and options for merging and AMD module generation.

```xml
<plugin>
  <groupId>com.github.jknack</groupId>
  <artifactId>handlebars-maven-plugin</artifactId>
  <version>${handlebars-version}</version>
  <executions>
    <execution>
      <id>i18njs</id>
      <phase>prepare-package</phase>
      <goals>
        <goal>i18njs</goal>
      </goals>
      <configuration>
        <output>${project.build.directory}/${project.build.finalName}/js</output>
        <bundle>messages</bundle>
        <merge>false</merge>
        <amd>false</amd>
        <encoding>UTF-8</encoding>
      </configuration>
    </execution>
  </executions>
</plugin>
```

--------------------------------

### i18n Helper with Message Formatting

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Illustrates using the 'i18n' helper with arguments to interpolate values into message patterns defined in the ResourceBundle.

```html
{{i18n "hello" "Handlebars.java"}}
```

--------------------------------

### Iterate and Display Stock Data with Handlebars

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars/src/test/resources/com/github/jknack/handlebars/bench/stocks.hbs.html

Use the #each helper to loop through stock items and display symbol, name, price, change, and ratio. Access item properties directly or using the @index.

```handlebars
{{#each items base=1}} {{/each}}

#

symbol

name

price

change

ratio

{{&@index}}

[{{&symbol}}](/stocks/{{&symbol}})

[{{&name}}]({{&url}})

**{{&price}}**

{{&change}}

{{&ratio}}
```

--------------------------------

### i18n Helper with Specific Locale

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Demonstrates using the 'i18n' helper to fetch translations for a specific locale, requiring a locale-specific properties file.

```html
{{i18n "hello" locale="es_AR"}}
```

--------------------------------

### Precompile Handlebars Templates with Maven

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-maven-plugin/README.md

Configure the plugin in your pom.xml to precompile Handlebars/Mustache templates to JavaScript. Specify output file, template prefix, suffix, and handlebars.js file location. Optional settings include minimization, runtime, AMD module generation, encoding, and specific templates to process.

```xml
<plugin>
  <groupId>com.github.jknack</groupId>
  <artifactId>handlebars-maven-plugin</artifactId>
  <version>${handlebars-version}</version>
  <executions>
    <execution>
      <id>precompile</id>
      <phase>prepare-package</phase>
      <goals>
        <goal>precompile</goal>
      </goals>
      <configuration>
        <output>${project.build.directory}/${project.build.finalName}/js/helpers.js</output>
        <prefix>${basedir}/src/main/webapp</prefix>
        <suffix>.hbs</suffix>
        <handlebarsJsFile>/handlebars-v1.3.0.js</handlebarsJsFile>
        <minimize>false</minimize>
        <runtime></runtime>
        <amd>false</amd>
        <encoding>UTF-8</encoding>
        <templates>
          <template>mytemplateA</template>
          <template>mytemplateB</template>
        </templates>
      </configuration>
    </execution>
  </executions>
</plugin>
```

--------------------------------

### Compile and Apply Inline Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Demonstrates how to compile an inline Handlebars template and apply it with a given string value. This is useful for simple, dynamic string generation.

```java
Handlebars handlebars = new Handlebars();

Template template = handlebars.compileInline("Hello {{this}}!");

System.out.println(template.apply("Handlebars.java"));
```

--------------------------------

### Define Helper Methods in a HelperSource Class

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Define public methods in a class to be used as helpers. Method names become helper names. Context, parameters, and options are optional arguments.

```java
public class HelperSource {
  public String blog(Blog blog, Options options) {
    return options.fn(blog);
  }

  public static String now() {
    return new Date().toString();
  }

  public String render(Blog context, String param0, int param1, boolean param2, Options options) {
    return ...
  }
}
```

--------------------------------

### Precompiled Template Output

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

This is the JavaScript output generated by the 'precompile' helper for the 'user' template.

```html
<script type="text/javascript">
(function() {
  var template = Handlebars.template, templates = Handlebars.templates = Handlebars.templates || {};
templates['user'] = template(function (Handlebars,depth0,helpers,partials,data) {
  helpers = helpers || Handlebars.helpers;
  var buffer = "", functionType="function", escapeExpression=this.escapeExpression;


  buffer += "Hi ";
  depth0 = typeof depth0 === functionType ? depth0() : depth0;
  buffer += escapeExpression(depth0) + "!";
  return buffer;
});
})();
</script>
```

--------------------------------

### Register Helpers from a HelperSource Class

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register all public static methods from a HelperSource class as helpers. This is useful for utility-like helpers.

```java
handlebars.registerHelpers(HelperSource.class);
```

--------------------------------

### Registering String Helpers

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Note that string helpers are not registered by default and must be explicitly added to the Handlebars instance.

```markdown
> NOTE: You need to register string helpers (they are not added by default)
```

--------------------------------

### Access Helper Default Parameters

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Access parameters passed to a helper, providing default values if the parameter is not supplied. The default value is returned if the parameter index is out of bounds.

```java
handlebars.registerHelper("blog-list", new Helper<Blog>() {
  public CharSequence apply(List<Blog> list, Options options) {
    String p0 = options.param(0, "param0");
    assertEquals("param0", p0);
    Integer p1 = options.param(1, 123);
    assertEquals(123, p1);
    ...
  }
});

Template template = handlebars.compileInline("{{#blog-list blogs}}{{/blog-list}}");
```

--------------------------------

### Register Helpers from a HelperSource Instance

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register all public methods from a HelperSource instance as helpers. This allows for a more object-oriented approach to helper definition.

```java
handlebars.registerHelpers(new HelperSource());
```

--------------------------------

### Include Helper for Partials

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-helpers/README.md

The include helper is a port from handlebars.js and supports plain partials, aligning with the Mustache Specification. It is necessary if you intend to use handlebars.js features that are not natively supported by Handlebars.java's partials.

--------------------------------

### Handlebars Template with Block Helper

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

A simple Handlebars template using a block helper.

```handlebars

{{#block}} {{/block}}

```

--------------------------------

### Register a JavaScript Helper

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register helpers written in JavaScript. This requires a JavaScript file containing Handlebars helper definitions.

```javascript
Handlebars.registerHelper('hello', function (context) {
 return 'Hello ' + context;
})
```

--------------------------------

### Enabling String Parameter Access in Helpers

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Configures Handlebars.java to resolve parameters by name when their values are not present in the context stack, allowing access via options.param(index).

```java
  Handlebars handlebars = new Handlebars()
    .stringParams(true);
  
  handlebars.registerHelper("sayHi", new Helper<Object>() {
    public Object apply(Object context, Options options) {
      return "Hello " + options.param(0) + "!";
    }
  });

```

--------------------------------

### Embedded Helper Usage

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Shows the basic usage of the 'embedded' helper to include a template by its name.

```handlebars
{{embedded "template"}}
```

--------------------------------

### Configuring JavaBeanValueResolver

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code to configure Handlebars.java to use the JavaBeanValueResolver for accessing properties via getter methods.

```java
Context context = Context
  .newBuilder(model)
  .resolver(JavaBeanValueResolver.INSTANCE)
  .build();
```

--------------------------------

### Configuring MethodValueResolver

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code to configure Handlebars.java to use the MethodValueResolver for accessing values via public methods.

```java
Context context = Context
  .newBuilder(model)
  .resolver(MethodValueResolver.INSTANCE)
  .build();
```

--------------------------------

### Handlebars Syntax Error Reporting Format

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Illustrates the format of syntax error messages, including file, line, column, message, evidence, and stack trace.

```plaintext
file:line:column: message
   evidence
   ^
[at file:line:column]
```

--------------------------------

### Configuring MapValueResolver

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code to configure Handlebars.java to use the MapValueResolver for accessing values from Map objects.

```java
Context context = Context
  .newBuilder(model)
  .resolver(MapValueResolver.INSTANCE)
  .build();
```

--------------------------------

### Number Helpers: isEven, isOdd, stripes

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-helpers/README.md

These helpers provide common number-related checks. Use `isEven` to determine if a number is even, and it can optionally return a custom string if true. The `stripes` helper is implied for alternating row styling.

```handlebars
{{isEven number}} // output: even
```

```handlebars
{{isEven number "row-even"}} // output: row-even
```

--------------------------------

### Registering a Helper Missing Implementation

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Overrides the default behavior of throwing an exception when a helper is not found by registering a 'helperMissing' implementation.

```java
  handlebars.registerHelperMissing(new Helper<Object>() {
    @Override
    public CharSequence apply(final Object context, final Options options) throws IOException {
      return options.fn.text();
    }
  });

```

--------------------------------

### i18n Helper Basic Usage

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The 'i18n' helper retrieves translated strings from a Java ResourceBundle. It requires a 'messages.properties' file in the classpath.

```html
{{i18n "hello"}}
```

--------------------------------

### Register Jackson 1.x JSON Helper

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register the Jackson 1.x JSON helper for use with Handlebars. This is useful for serializing objects to JSON within templates.

```xml
 <dependency>
   <groupId>com.github.jknack</groupId>
   <artifactId>handlebars-json</artifactId>
   <version>${handlebars-version}</version>
 </dependency>
```

```java
 handlebars.registerHelper("json", JacksonHelper.INSTANCE);
```

--------------------------------

### Add Handlebars.java Maven Dependency

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Include this XML snippet in your pom.xml to add the Handlebars.java library as a project dependency.

```xml
<dependency>
    <groupId>com.github.jknack</groupId>
    <artifactId>handlebars</artifactId>
    <version>${handlebars-version}</version>
  </dependency>
```

--------------------------------

### Register Jackson 1.x JSON Helper with View Alias

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Register the Jackson 1.x JSON helper with a custom view alias for more specific JSON serialization control.

```java
 handlebars.registerHelper("json", new JacksonHelper().viewAlias("myView",
   foo.MyFullyQualifiedClassName.class));
```

--------------------------------

### Add Jackson Module Dependency

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Include the Jackson module dependency for Handlebars.java. This enables JSON processing capabilities.

```xml
 <dependency>
   <groupId>com.github.jknack</groupId>
   <artifactId>handlebars-jackson</artifactId>
   <version>${handlebars-version}</version>
 </dependency>
```

--------------------------------

### Maven Dependency for Handlebars.java

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Add this dependency to your Maven project to include the handlebars-proto library.

```xml
<dependency>
  <groupId>com.github.jknack</groupId>
  <artifactId>handlebars-proto</artifactId>
  <version>${current-version}</version>
</dependency>
```

--------------------------------

### Configuring FieldValueResolver

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code to configure Handlebars.java to use the FieldValueResolver for accessing non-static fields directly.

```java
Context context = Context
  .newBuilder(model)
  .resolver(FieldValueResolver.INSTANCE)
  .build();
```

--------------------------------

### Define a TypeSafeTemplate Interface

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Extend TypeSafeTemplate to create type-safe templates. Add setter methods for template variables.

```java
public static interface UserTemplate extends TypeSafeTemplate<User> {

  public UserTemplate setAge(int age);

  public UserTemplate setRole(String role);

}
```

--------------------------------

### Configuring JsonNodeValueResolver

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code to configure Handlebars.java to use the JsonNodeValueResolver for accessing values from JsonNode objects (Jackson 1.x/2.x).

```java
Context context = Context
  .newBuilder(model)
  .resolver(JsonNodeValueResolver.INSTANCE)
  .build();
```

--------------------------------

### i18nJs Helper Usage

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The 'i18nJs' helper translates Java ResourceBundles into JavaScript code compatible with the I18n.js library. It can optionally specify a locale and bundle.

```handlebars
{{i18nJs [locale] [bundle=messages]}}
```

--------------------------------

### Configure HandlebarsViewResolver Value Resolvers

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Configure the HandlebarsViewResolver by setting its value resolvers. This allows customization of how values are resolved in templates.

```java
 HandlebarsViewResolver viewResolver = ...;

 viewResolver.setValueResolvers(...);
```

--------------------------------

### Partial Helper Usage

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The 'partial' helper defines a named region that can be included elsewhere, working with 'block' for template inheritance.

```handlebars
{{#partial "title"}}
    ...
{{/partial}}
```

--------------------------------

### Block Helper Usage

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The 'block' helper defines a named region within a template. It is used in conjunction with 'partial' for template inheritance.

```handlebars
{{#block "title"}}
    ...
{{/block}}
```

--------------------------------

### Embedded Template Output

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

This is the HTML output generated by the 'embedded' helper, including the template within a script tag.

```html
<script id="user-hbs" type="text/x-handlebars">
<tr>
  <td>{{firstName}}</td>
  <td>{{lastName}}</td>
</tr>
</script>
```

--------------------------------

### TemplateCache Interface Definition

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Defines the contract for template caching mechanisms in Handlebars.java, including methods for clearing, evicting, and retrieving templates.

```java
 public interface TemplateCache {

  /**
   * Remove all mappings from the cache.
   */
  void clear();

  /**
   * Evict the mapping for this source from this cache if it is present.
   *
   * @param source the source whose mapping is to be removed from the cache
   */
  void evict(TemplateSource source);

  /**
   * Return the value to which this cache maps the specified key.
   *
   * @param source source whose associated template is to be returned.
   * @param parser The Handlebars parser.
   * @return A template.
   * @throws IOException If input can't be parsed.
   */
  Template get(TemplateSource source, Parser parser) throws IOException;
}

```

--------------------------------

### Use Message Helper in Template

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Utilize the 'message' helper within a Handlebars template to display localized messages using Spring's MessageSource.

```handlebars
{{message "code" [arg]* [default="default message"]}}
```

--------------------------------

### Assign Helper for Temporary Variables

Source: https://github.com/jknack/handlebars.java/blob/master/handlebars-helpers/README.md

Use the assign helper to create auxiliary or temporary variables within your Handlebars templates. This is useful for storing intermediate values that can be referenced later.

```handlebars
{{#assign "benefitsTitle"}} benefits.{{type}}.title {{/assign}}
<span class="benefit-title"> {{i18n benefitsTitle}} </span>
```

--------------------------------

### Add SpringMVC Module Dependency

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Include the SpringMVC module dependency for Handlebars.java. This integrates Handlebars with Spring MVC applications.

```xml
 <dependency>
   <groupId>com.github.jknack</groupId>
   <artifactId>handlebars-springmvc</artifactId>
   <version>${handlebars-version}</version>
 </dependency>
```

--------------------------------

### Handlebars Block Helper Runtime Error

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Java code for a block helper that throws an IllegalArgumentException for invalid context types.

```java
public CharSequence apply(final Object context, final Options options) throws IOException {
  if (context == null) {
    throw new IllegalArgumentException(
        "found 'null', expected 'string'");
  }
  if (!(context instanceof String)) {
    throw new IllegalArgumentException(
        "found '" + context + "', expected 'string'");
  }
  ...
}
```

--------------------------------

### MissingValueResolver Implementation (Deprecated)

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

Provides a default value for template variables that resolve to null. This is deprecated for versions greater than 1.3.0.

```java
  MissingValueResolver missingValueResolver = new MissingValueResolver() {
    public String resolve(Object context, String name) {
      //return a default value or throw an exception
      ...;
    }
  };
  Handlebars handlebars = new Handlebars().with(missingValueResolver);

```

--------------------------------

### Handlebars Template Syntax Error Message

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The error message generated for the malformed Handlebars template.

```plaintext
/templates.hbs:1:8: found 'eof', expected: 'id', 'parameter', 'hash' or '}'
    {{value
           ^
```

--------------------------------

### Handlebars Runtime Error Message

Source: https://github.com/jknack/handlebars.java/blob/master/README.md

The error message reported by Handlebars.java for a runtime error within a block helper.

```plaintext
/base.hbs:2:4: found 'null', expected 'string'
    {{#block}} ... {{/block}}
```

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