org.glassfish.jersey.internal.ContextResolverFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jersey-common Show documentation
Show all versions of jersey-common Show documentation
Jersey core common packages
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.jersey.internal;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.ContextResolver;
import org.glassfish.jersey.internal.inject.AbstractModule;
import org.glassfish.jersey.internal.inject.ReferencingFactory;
import org.glassfish.jersey.internal.util.KeyComparatorHashMap;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import org.glassfish.jersey.internal.util.ReflectionHelper.DeclaringClassInterfacePair;
import org.glassfish.jersey.internal.util.collection.Ref;
import org.glassfish.jersey.message.internal.MediaTypes;
import org.glassfish.jersey.message.internal.MessageBodyFactory;
import org.glassfish.jersey.process.internal.RequestScope;
import org.glassfish.jersey.spi.ContextResolvers;
import org.glassfish.hk2.Factory;
import org.glassfish.hk2.Scope;
import org.glassfish.hk2.TypeLiteral;
import org.jvnet.hk2.annotations.Inject;
import com.google.common.collect.Maps;
/**
* A factory implementation for managing {@link ContextResolver} instances.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class ContextResolverFactory implements ContextResolvers {
/**
* Injection binding module defining {@link ContextResolverFactory} and
* {@link ContextResolvers} bindings.
*/
public static class Module extends AbstractModule {
private static class InjectionFactory extends ReferencingFactory {
public InjectionFactory(@Inject Factory> referenceFactory) {
super(referenceFactory);
}
}
//
private final Class refScope;
/**
* Create new context resolver factory injection bindings module.
*
* @param refScope scope of the {@link Ref Ref<ContextResolvers>} value
* injection.
*/
public Module(Class refScope) {
this.refScope = refScope;
}
@Override
protected void configure() {
bind(ContextResolvers.class)
.toFactory(InjectionFactory.class)
.in(RequestScope.class);
bind(new TypeLiteral>() {
})
.toFactory(ReferencingFactory.referenceFactory())
.in(refScope);
}
}
//
private final Map> resolver = Maps.newHashMapWithExpectedSize(3);
private final Map> cache = Maps.newHashMapWithExpectedSize(3);
/**
* Create new context resolver factory backed by the supplied {@link ServiceProviders
* service providers}.
*
* @param serviceProviders service providers backing the context resolver factory.
*/
public ContextResolverFactory(ServiceProviders serviceProviders) {
Map>> rs =
new HashMap>>();
Set providers =
serviceProviders.getAll(ContextResolver.class);
for (ContextResolver provider : providers) {
List ms = MediaTypes.createFrom(provider.getClass().getAnnotation(Produces.class));
Type type = getParameterizedType(provider.getClass());
Map> mr = rs.get(type);
if (mr == null) {
mr = new HashMap>();
rs.put(type, mr);
}
for (MediaType m : ms) {
List crl = mr.get(m);
if (crl == null) {
crl = new ArrayList();
mr.put(m, crl);
}
crl.add(provider);
}
}
// Reduce set of two or more context resolvers for same type and
// media type
for (Map.Entry>> e : rs.entrySet()) {
Map mr = new KeyComparatorHashMap(
4, MessageBodyFactory.MEDIA_TYPE_COMPARATOR);
resolver.put(e.getKey(), mr);
cache.put(e.getKey(), new ConcurrentHashMap(4));
for (Map.Entry> f : e.getValue().entrySet()) {
mr.put(f.getKey(), reduce(f.getValue()));
}
}
}
private Type getParameterizedType(Class c) {
DeclaringClassInterfacePair p = ReflectionHelper.getClass(
c, ContextResolver.class);
Type[] as = ReflectionHelper.getParameterizedTypeArguments(p);
return (as != null) ? as[0] : Object.class;
}
private static final NullContextResolverAdapter NULL_CONTEXT_RESOLVER =
new NullContextResolverAdapter();
private static final class NullContextResolverAdapter implements ContextResolver {
@Override
public Object getContext(Class type) {
throw new UnsupportedOperationException("Not supported yet.");
}
}
private static final class ContextResolverAdapter implements ContextResolver {
private final ContextResolver[] cra;
ContextResolverAdapter(ContextResolver... cra) {
this(removeNull(cra));
}
ContextResolverAdapter(List crl) {
this.cra = crl.toArray(new ContextResolver[crl.size()]);
}
@Override
public Object getContext(Class objectType) {
for (ContextResolver cr : cra) {
@SuppressWarnings("unchecked")
Object c = cr.getContext(objectType);
if (c != null) {
return c;
}
}
return null;
}
ContextResolver reduce() {
if (cra.length == 0) {
return NULL_CONTEXT_RESOLVER;
}
if (cra.length == 1) {
return cra[0];
} else {
return this;
}
}
private static List removeNull(ContextResolver... cra) {
List crl = new ArrayList(cra.length);
for (ContextResolver cr : cra) {
if (cr != null) {
crl.add(cr);
}
}
return crl;
}
}
private ContextResolver reduce(List r) {
if (r.size() == 1) {
return r.iterator().next();
} else {
return new ContextResolverAdapter(r);
}
}
@SuppressWarnings("unchecked")
@Override
public ContextResolver resolve(Type t, MediaType m) {
final ConcurrentHashMap crMapCache = cache.get(t);
if (crMapCache == null) {
return null;
}
if (m == null) {
m = MediaTypes.GENERAL_MEDIA_TYPE;
}
ContextResolver cr = crMapCache.get(m);
if (cr == null) {
final Map crMap = resolver.get(t);
if (m.isWildcardType()) {
cr = crMap.get(MediaTypes.GENERAL_MEDIA_TYPE);
if (cr == null) {
cr = NULL_CONTEXT_RESOLVER;
}
} else if (m.isWildcardSubtype()) {
// Include x, x/* and */*
final ContextResolver subTypeWildCard = crMap.get(m);
final ContextResolver wildCard = crMap.get(MediaTypes.GENERAL_MEDIA_TYPE);
cr = new ContextResolverAdapter(subTypeWildCard, wildCard).reduce();
} else {
// Include x, x/* and */*
final ContextResolver type = crMap.get(m);
final ContextResolver subTypeWildCard = crMap.get(new MediaType(m.getType(), "*"));
final ContextResolver wildCard = crMap.get(MediaType.WILDCARD_TYPE);
cr = new ContextResolverAdapter(type, subTypeWildCard, wildCard).reduce();
}
ContextResolver _cr = crMapCache.putIfAbsent(m, cr);
// If there is already a value in the cache use that
// instance, and discard the new and redundant instance, to
// ensure the same instance is always returned.
// The cached instance and the new instance will have the same
// functionality.
if (_cr != null) {
cr = _cr;
}
}
return (cr != NULL_CONTEXT_RESOLVER) ? cr : null;
}
}