/**
* Enhances controller classes with a method missing implementation for tags at compile time.
*
* @author Graeme Rocher
* @since 2.0
*/
public class ControllerTagLibraryApi extends CommonWebApi {
private static final long serialVersionUID = 1;
private transient TagLibraryLookup tagLibraryLookup;
private boolean developmentMode = Environment.isDevelopmentMode();
public ControllerTagLibraryApi(GrailsPluginManager pluginManager) {
super(pluginManager);
}
public ControllerTagLibraryApi() {
super(null);
}
@Autowired
public void setTagLibraryLookup(TagLibraryLookup lookup) {
tagLibraryLookup = lookup;
}
@Autowired
public void setGspTagLibraryLookup(TagLibraryLookup lookup) {
tagLibraryLookup = lookup;
}
/**
* Method missing implementation that handles tag invocation by method name
*
* @param instance The instance
* @param methodName The method name
* @param argsObject The arguments
* @return The result
*/
public Object methodMissing(Object instance, String methodName, Object argsObject) {
Object[] args =
argsObject instanceof Object[] ? (Object[]) argsObject : new Object[] {argsObject};
TagLibraryLookup lookup = getTagLibraryLookup();
if (lookup != null) {
GroovyObject tagLibrary = lookup.lookupTagLibrary(GroovyPage.DEFAULT_NAMESPACE, methodName);
if (tagLibrary != null) {
if (!developmentMode) {
MetaClass controllerMc = GrailsMetaClassUtils.getMetaClass(instance);
WebMetaUtils.registerMethodMissingForTags(
controllerMc, lookup, GroovyPage.DEFAULT_NAMESPACE, methodName);
}
List<MetaMethod> respondsTo =
tagLibrary.getMetaClass().respondsTo(tagLibrary, methodName, args);
if (respondsTo.size() > 0) {
return respondsTo.get(0).invoke(tagLibrary, args);
}
}
}
throw new MissingMethodException(methodName, instance.getClass(), args);
}
/**
* Looks up namespaces on missing property
*
* @param instance The instance
* @param propertyName The property name
* @return The namespace or a MissingPropertyException
*/
public Object propertyMissing(Object instance, String propertyName) {
TagLibraryLookup lookup = getTagLibraryLookup();
NamespacedTagDispatcher namespacedTagDispatcher =
lookup.lookupNamespaceDispatcher(propertyName);
if (namespacedTagDispatcher != null) {
if (!developmentMode) {
WebMetaUtils.registerPropertyMissingForTag(
GrailsMetaClassUtils.getMetaClass(instance), propertyName, namespacedTagDispatcher);
}
return namespacedTagDispatcher;
}
throw new MissingPropertyException(propertyName, instance.getClass());
}
public TagLibraryLookup getTagLibraryLookup() {
if (tagLibraryLookup == null) {
ApplicationContext applicationContext = getApplicationContext(null);
if (applicationContext != null) {
try {
tagLibraryLookup = applicationContext.getBean(TagLibraryLookup.class);
} catch (BeansException e) {
return null;
}
}
}
return tagLibraryLookup;
}
public Object withCodec(Object instance, Object codecInfo, Closure body) {
return WithCodecHelper.withCodec(getGrailsApplication(null), codecInfo, body);
}
}
/**
* An immutable ConverterConfiguration which chains the lookup calls for ObjectMarshallers for
* performance reasons.
*
* @author Siegfried Puchbauer
* @author Graeme Rocher
* @since 1.1
*/
@SuppressWarnings("rawtypes")
public class ChainedConverterConfiguration<C extends Converter>
implements ConverterConfiguration<C> {
private List<ObjectMarshaller<C>> marshallerList;
private ChainedObjectMarshaller<C> root;
private final String encoding;
private final Converter.CircularReferenceBehaviour circularReferenceBehaviour;
private final boolean prettyPrint;
private ProxyHandler proxyHandler;
private final boolean cacheObjectMarshallerByClass;
private Map<Integer, ObjectMarshaller<C>> objectMarshallerForClassCache;
private final boolean developmentMode = Environment.isDevelopmentMode();
private final ObjectMarshaller<C> NULL_HOLDER =
new ObjectMarshaller<C>() {
public boolean supports(Object object) {
return false;
}
public void marshalObject(Object object, C converter) throws ConverterException {}
};
public ChainedConverterConfiguration(ConverterConfiguration<C> cfg) {
this(cfg, new DefaultProxyHandler());
}
public ChainedConverterConfiguration(ConverterConfiguration<C> cfg, ProxyHandler proxyHandler) {
marshallerList = cfg.getOrderedObjectMarshallers();
this.proxyHandler = proxyHandler;
encoding = cfg.getEncoding();
prettyPrint = cfg.isPrettyPrint();
cacheObjectMarshallerByClass = cfg.isCacheObjectMarshallerByClass();
if (cacheObjectMarshallerByClass) {
objectMarshallerForClassCache = new ConcurrentHashMap<Integer, ObjectMarshaller<C>>();
}
circularReferenceBehaviour = cfg.getCircularReferenceBehaviour();
List<ObjectMarshaller<C>> oms = new ArrayList<ObjectMarshaller<C>>(marshallerList);
Collections.reverse(oms);
ChainedObjectMarshaller<C> prev = null;
for (ObjectMarshaller<C> om : oms) {
prev = new ChainedObjectMarshaller<C>(om, prev);
}
root = prev;
}
public ObjectMarshaller<C> getMarshaller(Object o) {
ObjectMarshaller<C> marshaller = null;
Integer cacheKey = null;
if (!developmentMode && cacheObjectMarshallerByClass && o != null) {
cacheKey = System.identityHashCode(o.getClass());
marshaller = objectMarshallerForClassCache.get(cacheKey);
if (marshaller != NULL_HOLDER && marshaller != null && !marshaller.supports(o)) {
marshaller = null;
}
}
if (marshaller == null) {
marshaller = root.findMarhallerFor(o);
if (cacheKey != null) {
objectMarshallerForClassCache.put(cacheKey, marshaller != null ? marshaller : NULL_HOLDER);
}
}
return marshaller != NULL_HOLDER ? marshaller : null;
}
public String getEncoding() {
return encoding;
}
public Converter.CircularReferenceBehaviour getCircularReferenceBehaviour() {
return circularReferenceBehaviour;
}
public boolean isPrettyPrint() {
return prettyPrint;
}
public List<ObjectMarshaller<C>> getOrderedObjectMarshallers() {
return marshallerList;
}
@SuppressWarnings("hiding")
public class ChainedObjectMarshaller<C extends Converter> implements ObjectMarshaller<C> {
private ObjectMarshaller<C> om;
private ChainedObjectMarshaller<C> next;
public ChainedObjectMarshaller(ObjectMarshaller<C> om, ChainedObjectMarshaller<C> next) {
this.om = om;
this.next = next;
}
public ObjectMarshaller<C> findMarhallerFor(Object o) {
if (supports(o)) {
return om;
}
return next != null ? next.findMarhallerFor(o) : null;
}
public boolean supports(Object object) {
return om.supports(object);
}
public void marshalObject(Object object, C converter) throws ConverterException {
om.marshalObject(object, converter);
}
}
public ProxyHandler getProxyHandler() {
return proxyHandler;
}
public boolean isCacheObjectMarshallerByClass() {
return cacheObjectMarshallerByClass;
}
}