package org.apache.tapestry.services.impl;
import ognl.ClassResolver;
import ognl.Ognl;
import ognl.OgnlContext;
import ognl.TypeConverter;
import org.apache.commons.pool.BasePoolableObjectFactory;
/**
* Used by {@link ExpressionEvaluatorImpl} to pool {@link ognl.OgnlContext} objects.
*/
public class PoolableOgnlContextFactory extends BasePoolableObjectFactory {
private final ClassResolver _resolver;
private TypeConverter _typeConverter;
public PoolableOgnlContextFactory(ClassResolver resolver, TypeConverter typeConverter)
{
_resolver = resolver;
_typeConverter = typeConverter;
}
public Object makeObject()
throws Exception
{
return Ognl.createDefaultContext(null, _resolver, _typeConverter);
}
public void activateObject(Object obj)
throws Exception
{
OgnlContext context = (OgnlContext)obj;
if (context.getRoot() != null || context.getValues().size() > 0) {
context.clear();
context.setRoot(null);
}
}
}