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org.apache.cocoon.components.variables
Class DefaultVariableResolverFactory

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.components.variables.DefaultVariableResolverFactory

All Implemented Interfaces:

Component, Contextualizable, LogEnabled, Serviceable, ThreadSafe, VariableResolverFactory

public class DefaultVariableResolverFactory
extends AbstractLogEnabled
implements ThreadSafe, VariableResolverFactory, Component, Serviceable, Contextualizable

This factory component creates a VariableResolver for an expression. A VariableResolver can then be used at runtime to resolve a variable with the current value. A variable can contain dynamic parts that are contained in {...},

Version:

CVS $Id: DefaultVariableResolverFactory.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Carsten Ziegeler

Field Summary

protected Context	context
protected ServiceManager	manager

Fields inherited from interface org.apache.cocoon.components.variables.VariableResolverFactory

ROLE

Constructor Summary

DefaultVariableResolverFactory()

Method Summary

void	contextualize(Context context)
VariableResolver	lookup(String expression) Get a resolver for a given expression.
protected boolean	needsResolve(String expression) Does an expression need resolving (i.e. contain {...} patterns) ?
void	release(VariableResolver resolver)
void	service(ServiceManager manager)

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Detail

manager

protected ServiceManager manager

context

protected Context context

Constructor Detail

DefaultVariableResolverFactory

public DefaultVariableResolverFactory()

Method Detail

service

public void service(ServiceManager manager)
             throws ServiceException

Specified by:

service in interface Serviceable

Throws:

ServiceException

lookup

public VariableResolver lookup(String expression)
                        throws PatternException

Get a resolver for a given expression. Chooses the most efficient implementation depending on expression. Don't forget to release the resolver

Specified by:

lookup in interface VariableResolverFactory

Throws:

PatternException

release

public void release(VariableResolver resolver)

Specified by:

release in interface VariableResolverFactory

needsResolve

protected boolean needsResolve(String expression)

Does an expression need resolving (i.e. contain {...} patterns) ?

contextualize

public void contextualize(Context context)
                   throws ContextException

Specified by:

contextualize in interface Contextualizable

Throws:

ContextException