Class XmlTemplateEngine
Templates may use the normal '${expression}' and '$variable' notations to insert an arbitrary expression into the template. In addition, support is also provided for special tags: <gsp:scriptlet> (for inserting code fragments) and <gsp:expression> (for code fragments which produce output).
Comments and processing instructions will be removed as part of processing and special XML characters such as <, >, " and ' will be escaped using the respective XML notation. The output will also be indented using standard XML pretty printing.
The xmlns namespace definition for gsp:
tags will be removed
but other namespace definitions will be preserved (but may change to an
equivalent position within the XML tree).
Normally, the template source will be in a file but here is a simple example providing the XML template as a string:
def binding = [firstname:"Jochen", lastname:"Theodorou", nickname:"blackdrag", salutation:"Dear"] def engine = new groovy.text.XmlTemplateEngine() def text = '''\ <?xml version="1.0" encoding="UTF-8"?> <document xmlns:gsp='http://groovy.codehaus.org/2005/gsp' xmlns:foo='baz' type='letter'> <gsp:scriptlet>def greeting = "${salutation}est"</gsp:scriptlet> <gsp:expression>greeting</gsp:expression> <foo:to>$firstname "$nickname" $lastname</foo:to> How are you today? </document> ''' def template = engine.createTemplate(text).make(binding) println template.toString()This example will produce this output:
<document type='letter'> Dearest <foo:to xmlns:foo='baz'> Jochen "blackdrag" Theodorou </foo:to> How are you today? </document>The XML template engine can also be used as the engine for
TemplateServlet
by placing the
following in your web.xml file (plus a corresponding servlet-mapping element):
<servlet> <servlet-name>XmlTemplate</servlet-name> <servlet-class>groovy.servlet.TemplateServlet</servlet-class> <init-param> <param-name>template.engine</param-name> <param-value>groovy.text.XmlTemplateEngine</param-value> </init-param> </servlet>
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Field Summary
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Constructor Summary
ConstructorDescriptionXmlTemplateEngine
(XmlParser xmlParser, GroovyShell groovyShell) XmlTemplateEngine
(XmlParser xmlParser, ClassLoader parentLoader) XmlTemplateEngine
(String indentation, boolean validating) -
Method Summary
Modifier and TypeMethodDescriptioncreateTemplate
(Reader reader) Creates a template by reading content from the Reader.void
setConfigurePrinter
(Closure configurePrinter) Closure that can be used to configure the printer.void
setIndentation
(String indentation) toString()
Methods inherited from class groovy.text.TemplateEngine
createTemplate, createTemplate, createTemplate, createTemplate, createTemplate
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Field Details
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DEFAULT_INDENTATION
- See Also:
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Constructor Details
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XmlTemplateEngine
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XmlTemplateEngine
public XmlTemplateEngine(String indentation, boolean validating) throws SAXException, ParserConfigurationException -
XmlTemplateEngine
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XmlTemplateEngine
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Method Details
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setConfigurePrinter
Closure that can be used to configure the printer. The printer is passed as a parameter to the closure.new XmlTemplateEngine(configurePrinter: { it.preserveWhitespace = true })
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createTemplate
public Template createTemplate(Reader reader) throws CompilationFailedException, ClassNotFoundException, IOException Description copied from class:TemplateEngine
Creates a template by reading content from the Reader.- Specified by:
createTemplate
in classTemplateEngine
- Throws:
CompilationFailedException
ClassNotFoundException
IOException
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getIndentation
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setIndentation
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toString
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