package org.ocpsoft.rewrite.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.ocpsoft.common.util.Assert;
import org.ocpsoft.rewrite.annotation.api.ClassContext;
import org.ocpsoft.rewrite.annotation.api.HandlerChain;
import org.ocpsoft.rewrite.annotation.spi.AnnotationHandler;
public class HandlerChainImpl implements HandlerChain
{
private final ClassContext context;
private AnnotatedElement element;
private final List<AnnotationHandler<Annotation>> handlers;
private int pos = 0;
@SuppressWarnings("unchecked")
public HandlerChainImpl(ClassContext context, AnnotatedElement element, List<? extends AnnotationHandler<?>> handlers)
{
this.context = context;
this.element = element;
this.handlers = new ArrayList<AnnotationHandler<Annotation>>();
this.handlers.addAll((Collection<? extends AnnotationHandler<Annotation>>) handlers);
}
@Override
public void proceed()
{
if (pos < handlers.size()) {
AnnotationHandler<Annotation> handler = handlers.get(pos++);
Annotation annotation = element.getAnnotation(handler.handles());
Assert.notNull(annotation, "Could not find annotation [" + handler.handles().getName() + "] on: " + element);
handler.process(context, annotation, this);
}
}
}