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package com.sun.jersey.core.spi.factory;
import com.sun.jersey.core.reflection.ReflectionHelper;
import com.sun.jersey.core.spi.component.ProviderServices;
import com.sun.jersey.spi.inject.Injectable;
import com.sun.jersey.spi.inject.InjectableProvider;
import com.sun.jersey.spi.inject.InjectableProviderContext;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.core.spi.component.ProviderServices.ProviderListener;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* A factory for managing {@link InjectableProvider} instances.
*
* @author [email protected]
*/
public class InjectableProviderFactory implements InjectableProviderContext {
private static final class MetaInjectableProvider {
final InjectableProvider ip;
final Class ac;
final Class cc;
MetaInjectableProvider(
InjectableProvider ip,
Class ac,
Class cc) {
this.ip = ip;
this.ac = ac;
this.cc = cc;
}
}
private final Map, LinkedList> ipm =
new HashMap, LinkedList>();
public final void update(InjectableProviderFactory ipf) {
for (Map.Entry, LinkedList> e : ipf.ipm.entrySet()) {
getList(e.getKey()).addAll(e.getValue());
}
}
@SuppressWarnings("unchecked")
public final void add(InjectableProvider ip) {
Type[] args = getMetaArguments(ip.getClass());
if (args != null) {
MetaInjectableProvider mip = new MetaInjectableProvider(ip,
(Class)args[0], (Class)args[1]);
// TODO change to add first
getList(mip.ac).add(mip);
} else {
// TODO throw exception or log error
}
}
public final void configure(ProviderServices providerServices) {
providerServices.getProvidersAndServices(InjectableProvider.class,
new ProviderListener() {
public void onAdd(InjectableProvider ip) {
add(ip);
}
});
}
public final void configureProviders(ProviderServices providerServices) {
providerServices.getProviders(InjectableProvider.class,
new ProviderListener() {
public void onAdd(InjectableProvider ip) {
add(ip);
}
});
}
private LinkedList getList(Class c) {
LinkedList l = ipm.get(c);
if (l == null) {
l = new LinkedList();
ipm.put(c, l);
}
return l;
}
private Type[] getMetaArguments(Class c) {
Class _c = c;
while (_c != Object.class) {
Type[] ts = _c.getGenericInterfaces();
for (Type t : ts) {
if (t instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType)t;
if (pt.getRawType() == InjectableProvider.class) {
Type[] args = pt.getActualTypeArguments();
for (int i = 0; i < args.length; i++)
args[i] = getResolvedType(args[i], c, _c);
if (args[0] instanceof Class &&
args[1] instanceof Class)
return args;
}
}
}
_c = _c.getSuperclass();
}
return null;
}
private Type getResolvedType(Type t, Class c, Class dc) {
if (t instanceof Class)
return t;
else if (t instanceof TypeVariable) {
ReflectionHelper.ClassTypePair ct = ReflectionHelper.
resolveTypeVariable(c, dc, (TypeVariable)t);
if (ct != null)
return ct.c;
else
return t;
} else if (t instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType)t;
return pt.getRawType();
} else
return t;
}
private List findInjectableProviders(
Class ac,
Class cc,
ComponentScope s) {
List subips = new ArrayList();
for (MetaInjectableProvider i : getList(ac)) {
if (s == i.ip.getScope()) {
if (i.cc.isAssignableFrom(cc)) {
subips.add(i);
}
}
}
return subips;
}
// InjectableProviderContext
public boolean isAnnotationRegistered(Class ac,
Class cc) {
for (MetaInjectableProvider i : getList(ac)) {
if (i.cc.isAssignableFrom(cc)) {
return true;
}
}
return false;
}
public boolean isInjectableProviderRegistered(Class ac,
Class cc,
ComponentScope s) {
return !findInjectableProviders(ac, cc, s).isEmpty();
}
public final Injectable getInjectable(
Class ac,
ComponentContext ic,
A a,
C c,
ComponentScope s) {
for (MetaInjectableProvider mip : findInjectableProviders(ac, c.getClass(), s)) {
Injectable i = mip.ip.getInjectable(ic, a, c);
if (i != null)
return i;
}
return null;
}
public final Injectable getInjectable(
Class ac,
ComponentContext ic,
A a,
C c,
List ls) {
for (ComponentScope s : ls) {
Injectable i = getInjectable(ac, ic, a, c, s);
if (i != null)
return i;
else {
}
}
return null;
}
public InjectableScopePair getInjectableWithScope(
Class ac,
ComponentContext ic,
A a,
C c,
List ls) {
for (ComponentScope s : ls) {
Injectable i = getInjectable(ac, ic, a, c, s);
if (i != null)
return new InjectableScopePair(i, s);
}
return null;
}
}
