com.sun.jersey.server.impl.component.ResourceFactory Maven / Gradle / Ivy
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package com.sun.jersey.server.impl.component;
import com.sun.jersey.server.spi.component.*;
import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.core.reflection.ReflectionHelper;
import com.sun.jersey.core.spi.component.ComponentConstructor;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentInjector;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.server.impl.inject.ServerInjectableProviderContext;
import com.sun.jersey.server.impl.resource.PerRequestFactory;
import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.Map;
/**
*
* @author [email protected]
*/
public class ResourceFactory {
private final ResourceConfig config;
private final ServerInjectableProviderContext ipc;
private final Map factories;
public ResourceFactory(ResourceConfig config, ServerInjectableProviderContext ipc) {
this.config = config;
this.ipc = ipc;
this.factories = new HashMap();
}
public ServerInjectableProviderContext getInjectableProviderContext() {
return ipc;
}
public ComponentScope getScope(Class c) {
return getComponentProviderFactory(c).getScope(c);
}
public ResourceComponentProvider getComponentProvider(ComponentContext cc, Class c) {
return getComponentProviderFactory(c).getComponentProvider(c);
}
protected ResourceComponentProviderFactory getComponentProviderFactory(Class c) {
Class providerFactoryClass = null;
// Use annotations to identify the correct provider, note that
// @ResourceComponentProviderClass is a meta-annotation so we look for annotations
// on the annotations of the resource class
for (Annotation a: c.getAnnotations()) {
Class annotationClass = a.annotationType();
ResourceComponentProviderFactoryClass rf = annotationClass.getAnnotation(
ResourceComponentProviderFactoryClass.class);
if (rf != null && providerFactoryClass == null)
providerFactoryClass = rf.value();
else if (rf != null && providerFactoryClass != null)
throw new ContainerException(c.toString()+
" has multiple ResourceComponentProviderClass annotations");
}
if (providerFactoryClass == null) {
Object v = config.getProperties().
get(ResourceConfig.PROPERTY_DEFAULT_RESOURCE_COMPONENT_PROVIDER_FACTORY_CLASS);
if (v == null) {
// Use default provider if none specified
providerFactoryClass = PerRequestFactory.class;
} else if (v instanceof String) {
try {
providerFactoryClass = getSubclass(ReflectionHelper.classForNameWithException((String)v));
} catch (ClassNotFoundException ex) {
throw new ContainerException(ex);
}
} else if (v instanceof Class) {
providerFactoryClass = getSubclass((Class)v);
} else {
throw new IllegalArgumentException("Property value for "
+ ResourceConfig.PROPERTY_DEFAULT_RESOURCE_COMPONENT_PROVIDER_FACTORY_CLASS
+ " of type Class or String");
}
}
ResourceComponentProviderFactory rcpf = factories.get(providerFactoryClass);
if (rcpf == null) {
rcpf = getInstance(providerFactoryClass);
factories.put(providerFactoryClass, rcpf);
}
return rcpf;
}
private Class getSubclass(Class c) {
if (ResourceComponentProviderFactory.class.isAssignableFrom(c)) {
return c.asSubclass(ResourceComponentProviderFactory.class);
} else {
throw new IllegalArgumentException("Property value for "
+ ResourceConfig.PROPERTY_DEFAULT_RESOURCE_COMPONENT_PROVIDER_FACTORY_CLASS
+ " of type " + c + " not of a subclass of " + ResourceComponentProviderFactory.class);
}
}
private ResourceComponentProviderFactory getInstance(
Class providerFactoryClass) {
try {
ComponentInjector ci =
new ComponentInjector(ipc, providerFactoryClass);
ComponentConstructor cc =
new ComponentConstructor(ipc, providerFactoryClass, ci);
return cc.getInstance();
} catch (Exception ex) {
throw new ContainerException("Unable to create resource component provider", ex);
}
}
}