Histone — powerful and flexible template engine, which can be used for HTML - code generation as well as any other kind of text - documents. Histone implementations exists for the web - browser as well as for the server (Java and PHP), it allows you to use same templates on the server and on the client. Built - in extension mechanism allows you to extend default template engine features, by adding your own methods and properties for the particular project. Templates has clean and simple syntax and can be stored either as source code or as compiled code that can be executed with the maximum performance wherever it's needed.
To use histone in your maven project you should add new maven dependency to your pom.xml
<dependency>
<groupId>com.github.megafonweblab.histone</groupId>
<artifactId>histone-java-v2</artifactId>
<version>1.0.1</version>
</dependency>Standart Maven project structure. |- src/ project sources |- assembly/ file with maven-assembly-plugin assembly descriptor |- etc/ file for maven-licence-plugin checks |- main/ main sources |- test/ tests sources
|- libs/ histone-java dependency libraries
|- histone-java-A.B.C.jar histone-java library
|- LICENSE.txt Apache v2.0 license file
|- NOTICE.txt file with copyright info
|- README.md this file
For Windows users before clone repo:
git config —global core.autocrlf falseClone repo:
git clone https://github.com/MegafonWebLab/histone-java2 histone-java2Go to the repo:
cd histone-java2Run test:
mvn clean test
Build and Run test:
mvn clean packageimport ru.histone.v2.evaluator.Context;
import ru.histone.v2.evaluator.Evaluator;
import ru.histone.v2.evaluator.resource.HistoneResourceLoader;
import ru.histone.v2.evaluator.resource.SchemaResourceLoader;
import ru.histone.v2.parser.Parser;
import ru.histone.v2.parser.node.ExpAstNode;
import ru.histone.v2.property.DefaultPropertyHolder;
import ru.histone.v2.rtti.RunTimeTypeInfo;
import java.util.LinkedHashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class Example {
public static void main(String[] args) {
// for evaluating AST-tree
final Evaluator evaluator = new Evaluator();
// for parsing string template
final Parser parser = new Parser();
// base executor service
final ExecutorService executorService = Executors.newFixedThreadPool(10);
// base resource loader
final HistoneResourceLoader loader = new SchemaResourceLoader(executorService);
// singleton with predefined functions
final RunTimeTypeInfo runTimeTypeInfo = new RunTimeTypeInfo(executorService, loader, evaluator, parser);
final String baseUri = "http://localhost/";
// context for evaluating
final Context ctx = Context.createRoot(baseUri, runTimeTypeInfo, new DefaultPropertyHolder());
// parsing template and create AST-tree
final ExpAstNode node = parser.process("{{var x = 'Hello world!!'}}{{x}}", baseUri);
// evaluate AST-tree
final String res = evaluator.process(node, ctx);
System.out.println(res);
}
}
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