ActivationContextManagerImpl.java

package com.wooki.services.security;

import java.util.Map;

import org.apache.tapestry5.EventContext;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
import org.apache.tapestry5.runtime.Component;
import org.apache.tapestry5.services.ComponentSource;
import org.apache.tapestry5.services.InvalidationListener;

public class ActivationContextManagerImpl implements ActivationContextManager, InvalidationListener
{

    @Inject
    private ComponentSource source;

    /**
     * This map store all the activation context definition for a given page
     */
    private Map<String, ActivationContextDefinition> definition = CollectionFactory
            .newCaseInsensitiveMap();

    public boolean checkContext(String pageName, EventContext ctx)
    {

        Component page = source.getPage(pageName);

        ActivationContextDefinition def = getDefinition(pageName, page.getClass());

        return def.findMatchingMethod(pageName, ctx);
    }

    /**
     * Get the definition from Map or create it and return it.
     * 
     * @param pageName
     * @param clazz
     * @return
     */
    private ActivationContextDefinition getDefinition(String pageName, Class<?> clazz)
    {

        synchronized (this.definition)
        {
            if (definition.containsKey(pageName)) { return definition.get(pageName); }
        }

        ActivationContextDefinition def = new ActivationContextDefinition(clazz);

        synchronized (this.definition)
        {
            this.definition.put(pageName, def);
        }

        return def;

    }

    public synchronized void objectWasInvalidated()
    {
        this.definition.clear();
    }
}