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package org.glassfish.jersey.server.model;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import javax.ws.rs.NameBinding;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.core.MediaType;
import org.glassfish.jersey.message.internal.MediaTypes;
import org.glassfish.jersey.model.NameBound;
import org.glassfish.jersey.process.Inflector;
import org.glassfish.jersey.uri.PathPattern;
import com.google.common.base.Function;
import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
/**
* Model of a method available on a resource. Covers resource method, sub-resource
* method and sub-resource locator.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class ResourceMethod implements ResourceModelComponent, Producing, Consuming, Suspendable, NameBound {
/**
* Resource method classification based on the recognized JAX-RS
* resource method types.
*/
public static enum JaxrsType {
/**
* JAX-RS resource method.
*
* Does not have a path template assigned. Is assigned to a particular HTTP method.
*/
RESOURCE_METHOD {
@Override
PathPattern createPatternFor(String pathTemplate) {
// template is ignored.
return PathPattern.END_OF_PATH_PATTERN;
}
},
/**
* JAX-RS sub-resource method.
*
* Has a sub-path template assigned and is assigned to a particular HTTP method.
*/
SUB_RESOURCE_METHOD {
@Override
PathPattern createPatternFor(String pathTemplate) {
return new PathPattern(pathTemplate, PathPattern.RightHandPath.capturingZeroSegments);
}
},
/**
* JAX-RS sub-resource locator.
*
* Has a sub-path template assigned but is not assigned to any particular HTTP method.
* Instead it produces a sub-resource instance that should be further
* used in the request URI matching.
*/
SUB_RESOURCE_LOCATOR {
@Override
PathPattern createPatternFor(String pathTemplate) {
return new PathPattern(pathTemplate, PathPattern.RightHandPath.capturingZeroOrMoreSegments);
}
};
/**
* Create a proper matching path pattern from the provided template for
* the selected method type.
*
* @param pathTemplate method path template.
* @return method matching path pattern.
*/
abstract PathPattern createPatternFor(String pathTemplate);
private static JaxrsType classify(String httpMethod) {
if (httpMethod != null && !httpMethod.isEmpty()) {
return RESOURCE_METHOD;
} else {
return SUB_RESOURCE_LOCATOR;
}
}
}
/**
* Resource method model builder.
*/
public static final class Builder {
private final Resource.Builder parent;
// HttpMethod
private String httpMethod;
// Consuming & Producing
private final Set consumedTypes;
private final Set producedTypes;
// Suspendable
private boolean managedAsync;
private boolean suspended;
private long suspendTimeout;
private TimeUnit suspendTimeoutUnit;
// Invocable
private Class handlerClass;
private Object handlerInstance;
private Method handlingMethod;
private Method validateMethod;
private boolean encodedParams;
// NameBound
private final Collection> nameBindings;
/**
* Create a resource method builder.
*
* The supplied parent resource model builder will be called to register
* the newly created resource method instance as part of the {@link #build()}
* method invocation.
*
*
* Note that the {@link #build()} method does not have to be invoked manually
* as the registration will happen automatically as part of the
* {@link org.glassfish.jersey.server.model.Resource.Builder#build()} method
* invocation.
*
* @param parent parent resource model builder.
*/
Builder(final Resource.Builder parent) {
this.parent = parent;
this.httpMethod = null;
this.consumedTypes = Sets.newLinkedHashSet();
this.producedTypes = Sets.newLinkedHashSet();
this.suspended = false;
this.suspendTimeout = AsyncResponse.NO_TIMEOUT;
this.suspendTimeoutUnit = TimeUnit.MILLISECONDS;
this.encodedParams = false;
this.nameBindings = Sets.newLinkedHashSet();
}
/**
* Set the associated HTTP method name.
*
* @param name HTTP method name.
* @return updated builder object.
*/
public Builder httpMethod(String name) {
this.httpMethod = name;
return this;
}
/**
* Add produced media types supported by the component.
*
* @param types produced media types.
* @return updated builder object.
*/
public Builder produces(String... types) {
return produces(MediaTypes.createFrom(types));
}
/**
* Add produced media types supported by the component.
*
* @param types produced media types.
* @return updated builder object.
*/
public Builder produces(MediaType... types) {
return produces(Arrays.asList(types));
}
/**
* Add produced media types supported by the component.
*
* @param types produced media types.
* @return updated builder object.
*/
public Builder produces(Collection types) {
this.producedTypes.addAll(types);
return this;
}
/**
* Add consumed media types supported by the component.
*
* @param types consumed media types.
* @return updated builder object.
*/
public Builder consumes(String... types) {
return consumes(MediaTypes.createFrom(types));
}
/**
* Add consumed media types supported by the component.
*
* @param types consumed media types.
* @return updated builder object.
*/
public Builder consumes(MediaType... types) {
return consumes(Arrays.asList(types));
}
/**
* Add consumed media types supported by the component.
*
* @param types consumed media types.
* @return updated builder object.
*/
public Builder consumes(Collection types) {
this.consumedTypes.addAll(types);
return this;
}
/**
* Adds name bindings. The passed annotation types not annotated with {@link javax.ws.rs.NameBinding}
* meta-annotation will be ignored.
*
* @param nameBindings collection of name binding annotation types.
* @return updated builder object.
*/
public Builder nameBindings(final Collection> nameBindings) {
for (Class nameBinding : nameBindings) {
if (nameBinding.getAnnotation(NameBinding.class) != null) {
this.nameBindings.add(nameBinding);
}
}
return this;
}
/**
* Adds name bindings. The passed annotation types not annotated with {@link javax.ws.rs.NameBinding}
* meta-annotation will be ignored.
*
* @param nameBindings name binding annotation types.
* @return updated builder object.
*/
public Builder nameBindings(final Class... nameBindings) {
return nameBindings(Arrays.asList(nameBindings));
}
/**
* Adds name bindings. The passed annotations not annotated with {@link javax.ws.rs.NameBinding}
* meta-annotation will be ignored.
*
* @param nameBindings name binding annotations.
* @return updated builder object.
*/
public Builder nameBindings(final Annotation... nameBindings) {
return nameBindings(Collections2.transform(Arrays.asList(nameBindings),
new Function>() {
@Override
public Class apply(Annotation input) {
return input.annotationType();
}
})
);
}
/**
* Mark the component for suspending.
*
* An invocation of a component (resource or sub-resource method) marked
* for suspending will be automatically suspended by the Jersey runtime.
*
* @param timeout suspend timeout value.
* @param unit suspend timeout time unit.
* @return updated builder object.
*/
public Builder suspended(long timeout, TimeUnit unit) {
suspended = true;
suspendTimeout = timeout;
suspendTimeoutUnit = unit;
return this;
}
public Builder managedAsync() {
managedAsync = true;
return this;
}
/**
* If set to {@code true}, the parameter values will not be automatically
* decoded.
*
* Defaults to {@code false}.
*
* @param value {@code true} if the automatic parameter decoding should be
* disabled, false otherwise.
* @return updated builder object.
* @see javax.ws.rs.Encoded
*/
public Builder encodedParameters(boolean value) {
encodedParams = value;
return this;
}
/**
* Define a resource method handler binding.
*
* @param handlerClass concrete resource method handler class.
* @param method handling method.
* @return updated builder object.
*/
public Builder handledBy(Class handlerClass, Method method) {
this.handlerInstance = null;
this.handlerClass = handlerClass;
this.handlingMethod = method;
return this;
}
/**
* Define a resource method handler binding.
*
* @param handlerInstance concrete resource method handler instance.
* @param method handling method.
* @return updated builder object.
*/
public Builder handledBy(Object handlerInstance, Method method) {
this.handlerClass = null;
this.handlerInstance = handlerInstance;
this.handlingMethod = method;
return this;
}
/**
* Define an inflector-based resource method handler binding.
*
* @param inflector inflector handling the resource method.
* @return updated builder object.
*/
public Builder handledBy(Inflector inflector) {
return handledBy(inflector, Invocable.APPLY_INFLECTOR_METHOD);
}
/**
* Define an inflector-based resource method handler binding.
*
* @param inflectorClass class of the inflector handling the resource method.
* @return updated builder object.
*/
public Builder handledBy(Class inflectorClass) {
return handledBy(inflectorClass, Invocable.APPLY_INFLECTOR_METHOD);
}
/**
* Define a method that should be used during resource bean validation phase.
*
* @param validateMethod method used for validation purposes.
* @return updated builder object.
*/
public Builder validateUsing(final Method validateMethod) {
this.validateMethod = validateMethod;
return this;
}
/**
* Build the resource method model and register it with the parent
* {@link Resource.Builder Resource.Builder}.
*
* @return new resource method model.
*/
public ResourceMethod build() {
final Invocable invocable = createInvocable();
ResourceMethod method = new ResourceMethod(
httpMethod,
consumedTypes,
producedTypes,
managedAsync,
suspended,
suspendTimeout,
suspendTimeoutUnit,
invocable,
nameBindings);
parent.onBuildMethod(this, method);
return method;
}
private Invocable createInvocable() {
assert handlerClass != null || handlerInstance != null;
final MethodHandler handler;
if (handlerClass != null) {
handler = MethodHandler.create(handlerClass, encodedParams);
} else { // instance based
handler = MethodHandler.create(handlerInstance);
}
if (validateMethod == null) {
return Invocable.create(handler, handlingMethod, encodedParams);
} else {
return Invocable.create(handler, handlingMethod, validateMethod, encodedParams);
}
}
}
// JAX-RS method type
private final JaxrsType type;
// HttpMethod
private final String httpMethod;
// Consuming & Producing
private final List consumedTypes;
private final List producedTypes;
// SuspendableComponent
private final boolean managedAsync;
private final boolean suspended;
private final long suspendTimeout;
private final TimeUnit suspendTimeoutUnit;
// Invocable
private final Invocable invocable;
// NameBound
private final Collection> nameBindings;
private ResourceMethod(final String httpMethod,
final Collection consumedTypes,
final Collection producedTypes,
boolean managedAsync, final boolean suspended,
final long suspendTimeout,
final TimeUnit suspendTimeoutUnit,
final Invocable invocable,
final Collection> nameBindings
) {
this.managedAsync = managedAsync;
this.type = JaxrsType.classify(httpMethod);
this.httpMethod = (httpMethod == null) ? httpMethod : httpMethod.toUpperCase();
this.consumedTypes = Collections.unmodifiableList(Lists.newArrayList(consumedTypes));
this.producedTypes = Collections.unmodifiableList(Lists.newArrayList(producedTypes));
this.invocable = invocable;
this.suspended = suspended;
this.suspendTimeout = suspendTimeout;
this.suspendTimeoutUnit = suspendTimeoutUnit;
this.nameBindings = Collections.unmodifiableCollection(Lists.newArrayList(nameBindings));
}
/**
* Get the JAX-RS method type.
*
* @return the JAX-RS method type.
*/
public JaxrsType getType() {
return type;
}
/**
* Get the associated HTTP method.
*
* May return {@code null} in case the method represents a sub-resource
* locator.
*
* @return the associated HTTP method, or {@code null} in case this method
* represents a sub-resource locator.
*/
public String getHttpMethod() {
return httpMethod;
}
/**
* Get the invocable method model.
*
* @return invocable method model.
*/
public Invocable getInvocable() {
return invocable;
}
// Consuming
@Override
public List getConsumedTypes() {
return consumedTypes;
}
// Producing
@Override
public List getProducedTypes() {
return producedTypes;
}
// Suspendable
@Override
public long getSuspendTimeout() {
return suspendTimeout;
}
@Override
public TimeUnit getSuspendTimeoutUnit() {
return suspendTimeoutUnit;
}
@Override
public boolean isSuspendDeclared() {
return suspended;
}
@Override
public boolean isManagedAsyncDeclared() {
return managedAsync;
}
// ResourceModelComponent
@Override
public List getComponents() {
return Arrays.asList(invocable);
}
@Override
public void accept(ResourceModelVisitor visitor) {
visitor.visitResourceMethod(this);
}
// NameBound
@Override
public boolean isNameBound() {
return !nameBindings.isEmpty();
}
@Override
public Collection> getNameBindings() {
return nameBindings;
}
@Override
public String toString() {
return "ResourceMethod{" +
"httpMethod=" + httpMethod +
", consumedTypes=" + consumedTypes +
", producedTypes=" + producedTypes +
", suspended=" + suspended +
", suspendTimeout=" + suspendTimeout +
", suspendTimeoutUnit=" + suspendTimeoutUnit +
", invocable=" + invocable +
", nameBindings=" + nameBindings + '}';
}
}