org.apache.velocity

Class Template

java.lang.Object

org.apache.velocity.runtime.resource.Resource

org.apache.velocity.Template

public class Template
extends Resource

This class is used for controlling all template operations. This class uses a parser created by JavaCC to create an AST that is subsequently traversed by a Visitor.

 // set up and initialize Velocity before this code block

 Template template = Velocity.getTemplate("test.wm");
 Context context = new VelocityContext();

 context.put("foo", "bar");
 context.put("customer", new Customer());

 template.merge(context, writer);
 

Version:

$Id: Template.java 1866609 2019-09-08 10:42:47Z cbrisson $

Author:

Jason van Zyl, Geir Magnusson Jr.

Field Summary

Fields inherited from class org.apache.velocity.runtime.resource.Resource

data, encoding, lastModified, log, MILLIS_PER_SECOND, modificationCheckInterval, name, nextCheck, resourceLoader, rsvc, type

Constructor Summary

Constructors

Constructor and Description
Template() Default constructor

Method Summary

Modifier and Type	Method and Description
Map<String,Object>	getMacros() get the map of all macros defined by this template
void	initDocument() initializes the document.
void	merge(Context context, Writer writer) The AST node structure is merged with the context to produce the final output.
void	merge(Context context, Writer writer, List macroLibraries) The AST node structure is merged with the context to produce the final output.
boolean	process() gets the named resource as a stream, parses and inits

Methods inherited from class org.apache.velocity.runtime.resource.Resource

getData, getEncoding, getLastModified, getName, getResourceLoader, getType, isSourceModified, requiresChecking, setData, setEncoding, setLastModified, setModificationCheckInterval, setName, setResourceLoader, setRuntimeServices, setType, touch

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Template

public Template()

Default constructor

Method Detail

getMacros

public Map<String,Object> getMacros()

get the map of all macros defined by this template

Returns:

macros map

process

public boolean process()
                throws ResourceNotFoundException,
                       ParseErrorException

gets the named resource as a stream, parses and inits

Specified by:

process in class Resource

Returns:

true if successful

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - if template cannot be parsed due to syntax (or other) error.

initDocument

public void initDocument()
                  throws TemplateInitException

initializes the document. init() is not longer dependant upon context, but we need to let the init() carry the template name down through for VM namespace features

Throws:

TemplateInitException - When a problem occurs during the document initialization.

merge

public void merge(Context context,
                  Writer writer)
           throws ResourceNotFoundException,
                  ParseErrorException,
                  MethodInvocationException

The AST node structure is merged with the context to produce the final output.

Parameters:

context - Context with data elements accessed by template

writer - output writer for rendered template

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - if template cannot be parsed due to syntax (or other) error.

MethodInvocationException - When a method on a referenced object in the context could not invoked.

merge

public void merge(Context context,
                  Writer writer,
                  List macroLibraries)
           throws ResourceNotFoundException,
                  ParseErrorException,
                  MethodInvocationException

The AST node structure is merged with the context to produce the final output.

Parameters:

context - Context with data elements accessed by template

writer - output writer for rendered template

macroLibraries - a list of template files containing macros to be used when merging

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - if template cannot be parsed due to syntax (or other) error.

MethodInvocationException - When a method on a referenced object in the context could not invoked.

Since:

1.6