Mustache support for Spring MVC

spring-mvc-extension/README.md

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+#Mustache extension for Spring MVC
+
+To enable mustache views in your Spring MVC application add the `@EnableMustache` annotation to your configuration class.
+
+###Support for messages and themes
+
+This extension provides annotations to let you handle message resolving in your model attributes.
+
+<table>
+    <thead>
+        <tr>
+            <th>Annotation</th>
+            <th>Description</th>
+    </thead>
+    <tbody>
+        <tr>
+            <td>@Message</td>
+            <td>Annotated methods will have their return values resolved to a message.</td>
+        </tr>
+        <tr>
+            <td>@Theme</td>
+            <td>Annotated methods will have their return values resolved to a theme message.</td>
+        </tr>
+    </tbody>
+</table>
+
+Both `@Message` and `@Theme` can resolve embedded values.
+
+    public class MustacheGreetingContext {
+
+        private final String name;
+
+        public MustacheGreetingContext() {
+            this("name");
+        }
+
+        public MustacheGreetingContext(final String name) {
+            this.name = name;
+        }
+
+        @Message
+        public String getGreeting() {
+            return "${my.greeting.property}";
+        }
+
+        @Message
+        public String getName() {
+            return name;
+        }
+
+        @Theme
+        public String getColor() {
+            return "color";
+        }
+    }

spring-mvc-extension/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>nl.onedott.mustachejava.extension</groupId>
+  <artifactId>springmvc</artifactId>
+  <version>0.9.0</version>
+  <description>Spring MVC extension for mustache.java</description>
+  <url>http://github.com/spullara/mustache.java</url>
+
+    <developers>
+        <developer>
+            <name>Bart Tegenbosch</name>
+            <email>[email protected]</email>
+            <organization>Onedott</organization>
+            <organizationUrl>http://www.onedott.nl</organizationUrl>
+        </developer>
+    </developers>
+
+    <properties>
+        <spring.version>3.2.0.RELEASE</spring.version>
+        <!--<spring.version>4.0.5.RELEASE</spring.version>-->
+    </properties>
+
+  <dependencies>
+      <dependency>
+          <groupId>com.github.spullara.mustache.java</groupId>
+          <artifactId>compiler</artifactId>
+          <version>0.8.16</version>
+      </dependency>
+
+      <dependency>
+          <groupId>javax.servlet</groupId>
+          <artifactId>javax.servlet-api</artifactId>
+          <version>3.0.1</version>
+          <scope>provided</scope>
+      </dependency>
+
+      <dependency>
+          <groupId>org.springframework</groupId>
+          <artifactId>spring-webmvc</artifactId>
+          <version>${spring.version}</version>
+      </dependency>
+
+      <dependency>
+          <groupId>org.springframework</groupId>
+          <artifactId>spring-test</artifactId>
+          <version>${spring.version}</version>
+          <scope>compile</scope>
+      </dependency>
+
+      <dependency>
+          <groupId>org.mockito</groupId>
+          <artifactId>mockito-all</artifactId>
+          <version>1.9.5</version>
+          <scope>test</scope>
+      </dependency>
+
+      <dependency>
+          <groupId>junit</groupId>
+          <artifactId>junit</artifactId>
+          <version>4.11</version>
+          <scope>test</scope>
+      </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+        <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-surefire-plugin</artifactId>
+            <version>2.9</version>
+            <configuration>
+                <argLine>-Xmx128M</argLine>
+            </configuration>
+        </plugin>
+        <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-compiler-plugin</artifactId>
+            <configuration>
+                <source>1.7</source>
+                <target>1.7</target>
+                <encoding>UTF-8</encoding>
+            </configuration>
+        </plugin>
+        <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-javadoc-plugin</artifactId>
+            <executions>
+                <execution>
+                    <id>attach-javadocs</id>
+                    <goals>
+                        <goal>jar</goal>
+                    </goals>
+                </execution>
+            </executions>
+        </plugin>
+        <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-source-plugin</artifactId>
+            <executions>
+                <execution>
+                    <id>attach-sources</id>
+                    <goals>
+                        <goal>jar</goal>
+                    </goals>
+                </execution>
+            </executions>
+        </plugin>
+    </plugins>
+  </build>
+</project>

spring-mvc-extension/src/main/java/nl/onedott/mustachejava/extension/springmvc/SpringMustacheException.java

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+package nl.onedott.mustachejava.extension.springmvc;
+
+import com.github.mustachejava.MustacheException;
+
+/**
+ * @author Bart Tegenbosch
+ */
+public class SpringMustacheException extends MustacheException {
+    public SpringMustacheException(final String message) {
+        super(message);
+    }
+
+    public SpringMustacheException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+
+    public SpringMustacheException(final Throwable cause) {
+        super(cause);
+    }
+}

spring-mvc-extension/src/main/java/nl/onedott/mustachejava/extension/springmvc/annotation/EnableMustache.java

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+package nl.onedott.mustachejava.extension.springmvc.annotation;
+
+import nl.onedott.mustachejava.extension.springmvc.config.MustacheConfiguration;
+import org.springframework.context.annotation.Import;
+
+import java.lang.annotation.*;
+
+/**
+ * Enable Mustache views and model processing for Spring MVC.
+ *
+ * @author Bart Tegenbosch
+ */
+@Documented
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Import(MustacheConfiguration.class)
+public @interface EnableMustache {
+    /*
+     * The resource location for mustache templates.
+     * Supports resource prefixes like {@code file:} and {@code classpath:}
+     */
+    String value() default "mustache/";
+}

spring-mvc-extension/src/main/java/nl/onedott/mustachejava/extension/springmvc/annotation/Message.java

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+package nl.onedott.mustachejava.extension.springmvc.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * @author Bart Tegenbosch
+ */
+@Documented
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Message {
+
+}

spring-mvc-extension/src/main/java/nl/onedott/mustachejava/extension/springmvc/annotation/Theme.java

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+package nl.onedott.mustachejava.extension.springmvc.annotation;
+
+import java.lang.annotation.*;
+
+/**
+ * @author Bart Tegenbosch
+ */
+@Documented
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Theme {
+
+}

spring-mvc-extension/src/main/java/nl/onedott/mustachejava/extension/springmvc/config/MustacheConfiguration.java

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+package nl.onedott.mustachejava.extension.springmvc.config;
+
+import com.github.mustachejava.DefaultMustacheFactory;
+import com.github.mustachejava.MustacheFactory;
+import nl.onedott.mustachejava.extension.springmvc.annotation.EnableMustache;
+import nl.onedott.mustachejava.extension.springmvc.mustache.MessageSupportReflectionObjectHandler;
+import nl.onedott.mustachejava.extension.springmvc.view.MustacheView;
+import nl.onedott.mustachejava.extension.springmvc.view.MustacheViewResolver;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportAware;
+import org.springframework.core.io.Resource;
+import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.web.servlet.ViewResolver;
+
+import java.util.Map;
+
+/**
+ * Imported by using the {@link nl.onedott.mustachejava.extension.springmvc.annotation.EnableMustache} annotation.
+ *
+ * @author Bart Tegenbosch
+ */
+@Configuration
+public class MustacheConfiguration implements ImportAware {
+
+    @Autowired
+    private ApplicationContext context;
+
+    private Resource resourceLocation;
+
+    @Override
+    public void setImportMetadata(final AnnotationMetadata importMetadata) {
+        String className = EnableMustache.class.getName();
+        setProperties(importMetadata.getAnnotationAttributes(className));
+    }
+
+    @Bean
+    public MustacheFactory mustacheFactory() throws Exception {
+        DefaultMustacheFactory factory = new DefaultMustacheFactory(resourceLocation.getFile());
+        factory.setObjectHandler(new MessageSupportReflectionObjectHandler(context));
+        return factory;
+    }
+
+    @Bean
+    public ViewResolver viewResolver() throws Exception {
+        MustacheViewResolver viewResolver = new MustacheViewResolver(mustacheFactory());
+
+        viewResolver.setViewClass(MustacheView.class);
+        viewResolver.setSuffix(".mustache");
+        return viewResolver;
+    }
+
+    public void setProperties(final Map<String,Object> attributes) {
+        String pattern = (String) attributes.get("value");
+        resourceLocation = context.getResource(pattern);
+    }
+}

spring-mvc-extension/src/main/java/nl/onedott/mustachejava/extension/springmvc/mustache/MessageSupportReflectionObjectHandler.java

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+package nl.onedott.mustachejava.extension.springmvc.mustache;
+
+import com.github.mustachejava.reflect.ReflectionObjectHandler;
+import com.github.mustachejava.reflect.ReflectionWrapper;
+import com.github.mustachejava.util.Wrapper;
+import nl.onedott.mustachejava.extension.springmvc.annotation.Message;
+import nl.onedott.mustachejava.extension.springmvc.annotation.Theme;
+import org.springframework.context.MessageSource;
+import org.springframework.util.Assert;
+
+import java.lang.reflect.Method;
+
+/**
+ * Enables wrapper with message support.
+ * @author Bart Tegenbosch
+ */
+public class MessageSupportReflectionObjectHandler extends ReflectionObjectHandler {
+
+    private final MessageSource messageSource;
+
+    public MessageSupportReflectionObjectHandler(final MessageSource messageSource) {
+        Assert.notNull(messageSource);
+        this.messageSource = messageSource;
+    }
+
+    @Override
+    public Wrapper find(final String name, final Object[] scopes) {
+        Wrapper wrapper = super.find(name, scopes);
+        if (wrapper instanceof ReflectionWrapper) {
+            ReflectionWrapper w = (ReflectionWrapper) wrapper;
+            Method method = w.getMethod();
+
+            if (method.isAnnotationPresent(Message.class) || method.isAnnotationPresent(Theme.class)) {
+                wrapper = new MessageSupportReflectionWrapper(w, messageSource);
+            }
+        }
+
+        return wrapper;
+    }
+}