org.carrot2.util.xslt

Class TemplatesPool

java.lang.Object

org.carrot2.util.xslt.TemplatesPool

public final class TemplatesPool
extends Object

A pool of precompiled XSLT stylesheets (Templates). Caching can be disabled via constructor parameter or via setting a system property:

 template.caching
 

to false.

Field Summary

Fields

Modifier and Type	Field and Description
static String	TEMPLATE_CACHING_PROPERTY Global system property disabling template caching.
SAXTransformerFactory	tFactory SAXTransformerFactory capable of producing SAX-based transformers.

Constructor Summary

Constructors

Constructor and Description
TemplatesPool() Creates a TemplatesPool with caching enabled.
TemplatesPool(boolean templateCaching) Check for required facilities.

Method Summary

Methods

Modifier and Type	Method and Description
void	addTemplate(String key, Templates template) Add a new template to the pool.
Templates	compileTemplate(InputStream stream) Compile a Templates from a given stream.
Templates	compileTemplate(String systemId) Compile a Templates from a given system identifier.
TransformerHandler	getIdentityTransformerHandler()
Templates	getTemplate(String key) Retrieves a previously stored template, if available.
Transformer	newTransformer(Templates t) Return a new Transformer.
TransformerHandler	newTransformerHandler(Templates template) Return a new TransformerHandler based on a given precompiled Templates.

Methods inherited from class java.lang.Object

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

Field Detail

TEMPLATE_CACHING_PROPERTY

public static final String TEMPLATE_CACHING_PROPERTY

Global system property disabling template caching. This property can also be set at runtime (after the pool is initialized).

See Also:

Constant Field Values

tFactory

public final SAXTransformerFactory tFactory

SAXTransformerFactory capable of producing SAX-based transformers.

Constructor Detail

TemplatesPool

public TemplatesPool()
              throws Exception

Creates a TemplatesPool with caching enabled.

Throws:

Exception

TemplatesPool

public TemplatesPool(boolean templateCaching)
              throws Exception

Check for required facilities. If not available, an exception will be thrown.

Throws:

Exception

Method Detail

getIdentityTransformerHandler

public TransformerHandler getIdentityTransformerHandler()
                                                 throws TransformerConfigurationException

Returns:

returns the identity transformer handler.

Throws:

TransformerConfigurationException

getTemplate

public Templates getTemplate(String key)

Retrieves a previously stored template, if available.

addTemplate

public void addTemplate(String key,
               Templates template)

Add a new template to the pool. Addition is quite costly as it replaces the internal stylesheets HashMap.

compileTemplate

public Templates compileTemplate(String systemId)
                          throws SAXException

Compile a Templates from a given system identifier. The template is not added to the pool, a manual call to addTemplate(String, Templates) is required.

Throws:

SAXException

compileTemplate

public Templates compileTemplate(InputStream stream)
                          throws SAXException

Compile a Templates from a given stream. The template is not added to the pool automatically.

Throws:

SAXException

newTransformerHandler

public TransformerHandler newTransformerHandler(Templates template)
                                         throws TransformerConfigurationException

Return a new TransformerHandler based on a given precompiled Templates. The handler Transformer's ErrorListener is set to TransformerErrorListener to raise exceptions and give proper warnings.

Throws:

TransformerConfigurationException

newTransformer

public Transformer newTransformer(Templates t)
                           throws TransformerConfigurationException

Return a new Transformer.

Throws:

TransformerConfigurationException

See Also:

newTransformerHandler(Templates)