// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.
package jodd.madvoc.component;
import jodd.madvoc.ActionWrapper;
import jodd.madvoc.BaseActionWrapperStack;
import jodd.madvoc.MadvocException;
import jodd.petite.meta.PetiteInject;
import jodd.util.ReflectUtil;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Base wrapper manager implements common logic of a wrapper.
*/
public abstract class WrapperManager<T extends ActionWrapper> {
@PetiteInject
protected ContextInjectorComponent contextInjectorComponent;
@PetiteInject
protected MadvocConfig madvocConfig;
protected WrapperManager() {
wrappers = new HashMap<String, T>();
}
// ---------------------------------------------------------------- container
protected Map<String, T> wrappers;
/**
* Returns all action wrappers.
*/
protected Set<T> getAll() {
Set<T> set = new HashSet<T>(wrappers.size());
set.addAll(wrappers.values());
return set;
}
/**
* Looks up for existing wrapper. Returns <code>null</code> if wrapper is not already registered.
*/
public T lookup(String name) {
return wrappers.get(name);
}
/**
* Resolves single wrapper. Creates new wrapper instance if not already registered.
* Does not expand the wrappers.
*/
public T resolve(Class<? extends T> wrapperClass) {
String wrapperClassName = wrapperClass.getName();
T wrapper = lookup(wrapperClassName);
if (wrapper == null) {
wrapper = createWrapper(wrapperClass);
initializeWrapper(wrapper);
wrappers.put(wrapperClassName, wrapper);
}
return wrapper;
}
/**
* Resolves wrappers. Unregistered wrappers will be registered. Returned array may be
* different size than size of provided array, due to {@link #expand(Class[]) expanding}.
*/
public T[] resolveAll(Class<? extends T>[] wrapperClasses) {
if (wrapperClasses == null) {
return null;
}
wrapperClasses = expand(wrapperClasses);
T[] result = createArray(wrapperClasses.length);
for (int i = 0; i < wrapperClasses.length; i++) {
result[i] = resolve(wrapperClasses[i]);
}
return result;
}
/**
* Creates an array of wrapper instances.
*/
protected abstract T[] createArray(int len);
// ---------------------------------------------------------------- init
/**
* Initializes action wrapper.
*/
protected void initializeWrapper(T wrapper) {
contextInjectorComponent.injectContext(wrapper);
wrapper.init();
}
// ---------------------------------------------------------------- expander
/**
* Returns default wrappers from the configuration.
*/
protected abstract Class<? extends T>[] getDefaultWrappers();
/**
* Returns marker wrapper class, shortcut for default web app wrappers.
*/
protected abstract Class<? extends T> getDefaultWebAppWrapper();
/**
* Replaces all {@link #getDefaultWebAppWrapper()} with {@link #getDefaultWebAppWrapper()}
* and {@link BaseActionWrapperStack} with stack values.
*/
protected Class<? extends T>[] expand(Class<? extends T>[] actionWrappers) {
if (actionWrappers == null) {
return null;
}
List<Class<? extends T>> list = new ArrayList<Class<? extends T>>(actionWrappers.length);
list.addAll(Arrays.asList(actionWrappers));
int i = 0;
while (i < list.size()) {
Class<? extends T> wrapperClass = list.get(i);
if (wrapperClass == null) {
continue;
}
if (wrapperClass.equals(getDefaultWebAppWrapper())) {
list.remove(i);
// add default wrappers list
Class<? extends T>[] defaultWrappers = getDefaultWrappers();
if (defaultWrappers != null) {
int ndx = i;
for (Class<? extends T> defaultWrapper : defaultWrappers) {
// can't add default list stack to default list
if (defaultWrapper.equals(getDefaultWebAppWrapper())) {
throw new MadvocException("Default wrapper list is self-contained (cyclic dependency)!");
}
list.add(ndx, defaultWrapper);
ndx++;
}
}
continue;
}
if (ReflectUtil.isSubclass(wrapperClass, BaseActionWrapperStack.class)) {
BaseActionWrapperStack stack = (BaseActionWrapperStack) resolve(wrapperClass);
list.remove(i);
Class<? extends T>[] stackWrappers = stack.getWrappers();
if (stackWrappers != null) {
list.addAll(i, Arrays.asList(stackWrappers));
}
i--;
//continue;
}
i++;
}
return list.toArray(new Class[list.size()]);
}
// ---------------------------------------------------------------- create
/**
* Creates new wrapper.
*/
protected <R extends T> R createWrapper(Class<R> wrapperClass) {
try {
return wrapperClass.newInstance();
} catch (Exception ex) {
throw new MadvocException("Invalid Madvoc wrapper: " + wrapperClass, ex);
}
}
}