[Java] Class BaseTemplate

  • groovy.text.markup.BaseTemplate
All Implemented Interfaces and Traits:
Writable
public abstract class BaseTemplate
extends Object

All templates compiled through MarkupTemplateEngine extend this abstract class, which provides a number of utility methods to generate markup. An instance of this class can be obtained after calling Template.make or Template.make)} on a template generated by MarkupTemplateEngine.createTemplate.

It is advised to use a distinct template instance for each thread (or more simply, each rendered document) for thread safety and avoiding mixing models.

For the application needs, it is possible to provide more helper methods by extending this class and configuring the base template class using the TemplateConfiguration.setBaseTemplateClass method.

Constructor Summary

Constructors
Constructor and description
BaseTemplate (MarkupTemplateEngine templateEngine, Map model, Map<String, String> modelTypes, TemplateConfiguration configuration)

Methods Summary

Methods
Type Params Return Type Name and description
BaseTemplate comment(Object cs)
Renders the supplied object using its Object.toString method inside a comment markup block (<!
Closure contents(Closure cl)
Wraps a closure so that it can be used as a prototype for inclusion in layouts.
Object fragment(Map model, String templateText)
Renders an embedded template as a fragment.
Map getModel()
Writer getOut()
Convenience method to return the current writer instance.
void includeEscaped(String templatePath)
Includes contents of another file, not as a template but as escaped text.
void includeGroovy(String templatePath)
Includes another template inside this template.
void includeUnescaped(String templatePath)
Includes contents of another file, not as a template but as unescaped text.
Object layout(Map model, String templateName)
Imports a template and renders it using the specified model, allowing fine grained composition of templates and layouting.
Object layout(Map model, String templateName, boolean inheritModel)
Imports a template and renders it using the specified model, allowing fine grained composition of templates and layouting.
Object methodMissing(String tagName, Object args)
This is the main method responsible for writing a tag and its attributes.
void newLine()
Adds a new line to the output.
BaseTemplate pi(Map<?, ?> attrs)
Object run()
String stringOf(Closure cl)
String toString()
Object tryEscape(Object contents)
Escapes the string representation of the supplied object if it derives from CharSequence, otherwise returns the object itself.
Writer writeTo(Writer out)
Main method used to render a template.
BaseTemplate xmlDeclaration()
Renders an XML declaration header.
BaseTemplate yield(Object obj)
Renders the object provided as parameter using its Object.toString method, The contents is rendered after being escaped for XML, enforcing valid XML output.
BaseTemplate yieldUnescaped(Object obj)
Renders the object provided as parameter using its Object.toString method, The contents is rendered as is, unescaped.

Inherited Methods Summary

Inherited Methods
Methods inherited from class Name
class Object wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll

Constructor Detail

public BaseTemplate(MarkupTemplateEngine templateEngine, Map model, Map<String, String> modelTypes, TemplateConfiguration configuration)

Method Detail

public BaseTemplate comment(Object cs)

Renders the supplied object using its Object.toString method inside a comment markup block (<!-- ... -->). The object is rendered as is, unescaped.

throws:
IOException
Parameters:
cs - the object to be rendered inside an XML comment block.
Returns:
this template instance.

public Closure contents(Closure cl)

Wraps a closure so that it can be used as a prototype for inclusion in layouts. This is useful when you want to use a closure in a model, but that you don't want to render the result of the closure but instead call it as if it was a specification of a template fragment.

Parameters:
cl - the fragment to be wrapped
Returns:
a wrapped closure returning an empty string

public Object fragment(Map model, String templateText)

Renders an embedded template as a fragment. Fragments are cached in a template, meaning that if you use the same fragment in a template, it will only be compiled once, but once per template instance. This is less performant than using layout(java.util.Map, String).

throws:
IOException
throws:
ClassNotFoundException
Parameters:
model - model to be passed to the template
templateText - template body
Returns:
this template instance

public Map getModel()

public Writer getOut()

Convenience method to return the current writer instance.

Returns:
the current writer

public void includeEscaped(String templatePath)

Includes contents of another file, not as a template but as escaped text.

throws:
IOException
Parameters:
templatePath - the path to the other file

public void includeGroovy(String templatePath)

Includes another template inside this template.

throws:
IOException
throws:
ClassNotFoundException
Parameters:
templatePath - the path to the included resource.

public void includeUnescaped(String templatePath)

Includes contents of another file, not as a template but as unescaped text.

throws:
IOException
Parameters:
templatePath - the path to the other file

public Object layout(Map model, String templateName)

Imports a template and renders it using the specified model, allowing fine grained composition of templates and layouting. This works similarily to a template include but allows a distinct model to be used. This version doesn't inherit the model from the parent. If you need model inheritance, see layout(java.util.Map, String, boolean).

throws:
IOException
throws:
ClassNotFoundException
Parameters:
model - model to be passed to the template
templateName - the name of the template to be used as a layout
Returns:
this template instance

public Object layout(Map model, String templateName, boolean inheritModel)

Imports a template and renders it using the specified model, allowing fine grained composition of templates and layouting. This works similarily to a template include but allows a distinct model to be used. If the layout inherits from the parent model, a new model is created, with the values from the parent model, eventually overridden with those provided specifically for this layout.

throws:
IOException
throws:
ClassNotFoundException
Parameters:
model - model to be passed to the template
templateName - the name of the template to be used as a layout
inheritModel - a boolean indicating if we should inherit the parent model
Returns:
this template instance

public Object methodMissing(String tagName, Object args)

This is the main method responsible for writing a tag and its attributes. The arguments may be:

  • a closure
  • in which case the closure is rendered inside the tag body
  • a string
  • , in which case the string is rendered as the tag body
  • a map of attributes
  • in which case the attributes are rendered inside the opening tag

or a combination of (attributes,string), (attributes,closure)

throws:
IOException
Parameters:
tagName - the name of the tag
args - tag generation arguments
Returns:
this template instance

public void newLine()

Adds a new line to the output. The new line string can be configured by TemplateConfiguration.setNewLineString

throws:
IOException

public BaseTemplate pi(Map<?, ?> attrs)

Renders processing instructions. The supplied map contains all elements to be rendered as processing instructions. The key is the name of the element, the value is either a map of attributes, or an object to be rendered directly. For example:

pi("xml-stylesheet":[href:"mystyle.css", type:"text/css"])

will be rendered as:

     <?xml-stylesheet href='mystyle.css' type='text/css'?>
 
throws:
IOException
Parameters:
attrs - the attributes to render
Returns:
this template instance

public Object run()

public String stringOf(Closure cl)

public String toString()

public Object tryEscape(Object contents)

Escapes the string representation of the supplied object if it derives from CharSequence, otherwise returns the object itself.

Parameters:
contents - an object to be escaped for XML
Returns:
an escaped string, or the object itself

public Writer writeTo(Writer out)

Main method used to render a template.

throws:
IOException
Parameters:
out - the Writer to which this Writable should output its data.
Returns:
a writer instance

public BaseTemplate xmlDeclaration()

Renders an XML declaration header. If the declaration encoding is set in the template configuration, then the encoding is rendered into the declaration.

throws:
IOException
Returns:
this template instance

public BaseTemplate yield(Object obj)

Renders the object provided as parameter using its Object.toString method, The contents is rendered after being escaped for XML, enforcing valid XML output.

throws:
IOException
Parameters:
obj - the object to be rendered
Returns:
this template instance

public BaseTemplate yieldUnescaped(Object obj)

Renders the object provided as parameter using its Object.toString method, The contents is rendered as is, unescaped. This means that depending on what the Object.toString method call returns, you might create invalid markup.

throws:
IOException
Parameters:
obj - the object to be rendered unescaped
Returns:
this template instance

© 2003-2020 The Apache Software Foundation
Licensed under the Apache license.
https://docs.groovy-lang.org/2.5.14/html/gapi/groovy/text/markup/BaseTemplate.html