package org.jboss.windup.config.parser.xml;
import java.util.Collections;
import static org.joox.JOOX.$;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.StringUtils;
import org.jboss.forge.furnace.Furnace;
import org.jboss.forge.furnace.proxy.Proxies;
import org.jboss.windup.config.AbstractRuleProvider;
import org.jboss.windup.config.builder.RuleProviderBuilder;
import org.jboss.windup.config.exception.ConfigurationException;
import org.jboss.windup.config.furnace.FurnaceHolder;
import org.jboss.windup.config.parser.ElementHandler;
import org.jboss.windup.config.parser.NamespaceElementHandler;
import org.jboss.windup.config.parser.ParserContext;
import org.jboss.windup.config.phase.RulePhase;
import org.w3c.dom.Element;
/**
* Parses a "ruleset" element, and uses it to create a new {@link AbstractRuleProvider}
*
* @author <a href="mailto:jesse.sightler@gmail.com">Jesse Sightler</a>
*/
@NamespaceElementHandler(elementName = "ruleset", namespace = RuleProviderHandler.WINDUP_RULE_NAMESPACE)
public class RuleProviderHandler implements ElementHandler<Void>
{
private static final String ID = "id";
private static final String PHASE = "phase";
private static final AtomicInteger currentDefaultIDIndex = new AtomicInteger(0);
private Map<String, Class<? extends RulePhase>> cachedPhases;
public static final String WINDUP_RULE_NAMESPACE = "http://windup.jboss.org/schema/jboss-ruleset";
@Override
public Void processElement(ParserContext context, Element element) throws ConfigurationException
{
String id = element.getAttribute(ID);
if (StringUtils.isBlank(id))
{
id = generateDefaultID();
}
RuleProviderBuilder builder = RuleProviderBuilder.begin(id);
String phaseStr = element.getAttribute(PHASE);
Class<? extends RulePhase> phase = getPhases().get(classNameToKey(phaseStr));
builder.setPhase(phase);
context.setBuilder(builder);
List<Element> children = $(element).children().get();
for (Element child : children)
{
context.processElement(child);
}
context.addRuleProvider(builder);
return null;
}
private String generateDefaultID()
{
return "XMLRuleProvider:" + RandomStringUtils.random(4) + ":" + currentDefaultIDIndex.incrementAndGet();
}
private Map<String, Class<? extends RulePhase>> getPhases()
{
if (cachedPhases == null)
{
cachedPhases = new HashMap<>();
Furnace furnace = FurnaceHolder.getFurnace();
for (RulePhase phase : furnace.getAddonRegistry().getServices(RulePhase.class))
{
@SuppressWarnings("unchecked")
Class<? extends RulePhase> unwrappedClass = (Class<? extends RulePhase>) Proxies.unwrap(phase).getClass();
String simpleName = unwrappedClass.getSimpleName();
cachedPhases.put(classNameToKey(simpleName), unwrappedClass);
}
}
return Collections.unmodifiableMap(cachedPhases);
}
private String classNameToKey(String className)
{
return className.toUpperCase();
}
}