Author: shane.bryzak(a)jboss.com Date: 2008-07-03 23:27:53 -0400 (Thu, 03 Jul 2008) New Revision: 44 Added: ri/trunk/webbeans-impl/src/main/java/org/jboss/webbeans/BasicContext.java Log: Context implementation Added: ri/trunk/webbeans-impl/src/main/java/org/jboss/webbeans/BasicContext.java =================================================================== --- ri/trunk/webbeans-impl/src/main/java/org/jboss/webbeans/BasicContext.java (rev 0) +++ ri/trunk/webbeans-impl/src/main/java/org/jboss/webbeans/BasicContext.java 2008-07-04 03:27:53 UTC (rev 44) @@ -0,0 +1,86 @@ +package org.jboss.webbeans; + +import java.lang.annotation.Annotation; +import java.util.HashMap; +import java.util.Map; + +import javax.webbeans.ComponentInstance; +import javax.webbeans.Container; +import javax.webbeans.Context; + +/** + * Basic implementation of javax.webbeans.Context, backed by a HashMap + * + * @author Shane Bryzak + * + */ +public class BasicContext implements Context +{ + private Map<ComponentInstance<?>, Object> values; + private Class<Annotation> scopeType; + + public BasicContext(Class<Annotation> scopeType) + { + this.scopeType = scopeType; + values = new HashMap<ComponentInstance<?>,Object>(); + } + + @SuppressWarnings("unchecked") + public <T> T get(Container container, ComponentInstance<T> component, boolean create) + { + T instance = (T) values.get(component); + if (instance != null) + { + return instance; + } + + if (!create) + { + return null; + } + + // TODO should component creation be synchronized? + + instance = component.create(container); + + values.put(component, instance); + return instance; + } + + public Class<Annotation> getScopeType() + { + return scopeType; + } + + @SuppressWarnings("unchecked") + public <T> void remove(Container container, ComponentInstance<T> component) + { + T instance = (T) values.get(component); + + if (instance != null) + { + values.remove(component); + component.destroy(container, instance); + } + else + { + // TODO is this the correct exception to throw? See section 9.1 of spec + throw new RuntimeException("Component " + component.getName() + " cannot be removed as it " + + "does not exist in [" + scopeType + "] context."); + } + } + + @SuppressWarnings("unchecked") + public void destroy(Container container) + { + // TODO this method isn't declared by the interface, but is implied by section 9.1.2 of the spec + + for (ComponentInstance c : values.keySet()) + { + c.destroy(container, values.get(c)); + } + + values.clear(); + } + +}