javax.ws.rs.ext.InterceptorContext Maven / Gradle / Ivy
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/*
* Copyright (c) 2011, 2017 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package javax.ws.rs.ext;
import javax.ws.rs.core.MediaType;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collection;
/**
* Context shared by message body interceptors that can be used to wrap
* calls to {@link javax.ws.rs.ext.MessageBodyReader#readFrom} and
* {@link javax.ws.rs.ext.MessageBodyWriter#writeTo}. The getters and
* setters in this context class correspond to the parameters in
* the aforementioned methods.
*
* @author Santiago Pericas-Geertsen
* @author Bill Burke
* @see ReaderInterceptor
* @see WriterInterceptor
* @see ReaderInterceptorContext
* @see WriterInterceptorContext
* @since 2.0
*/
public interface InterceptorContext {
/**
* Returns the property with the given name registered in the current request/response
* exchange context, or {@code null} if there is no property by that name.
*
* A property allows a filters and interceptors to exchange
* additional custom information not already provided by this interface.
*
*
* A list of supported properties can be retrieved using {@link #getPropertyNames()}.
* Custom property names should follow the same convention as package names.
*
*
* In a Servlet container, on the server side, the properties are backed by the
* {@code ServletRequest} and contain all the attributes available in the {@code ServletRequest}.
*
*
* @param name a {@code String} specifying the name of the property.
* @return an {@code Object} containing the value of the property, or
* {@code null} if no property exists matching the given name.
* @see #getPropertyNames()
*/
public Object getProperty(String name);
/**
* Returns an immutable {@link java.util.Collection collection} containing the property
* names available within the context of the current request/response exchange context.
*
* Use the {@link #getProperty} method with a property name to get the value of
* a property.
*
*
* In a Servlet container, the properties are synchronized with the {@code ServletRequest}
* and expose all the attributes available in the {@code ServletRequest}. Any modifications
* of the properties are also reflected in the set of properties of the associated
* {@code ServletRequest}.
*
*
* @return an immutable {@link java.util.Collection collection} of property names.
* @see #getProperty
*/
public Collection getPropertyNames();
/**
* Binds an object to a given property name in the current request/response
* exchange context. If the name specified is already used for a property,
* this method will replace the value of the property with the new value.
*
* A property allows a filters and interceptors to exchange
* additional custom information not already provided by this interface.
*
*
* A list of supported properties can be retrieved using {@link #getPropertyNames()}.
* Custom property names should follow the same convention as package names.
*
*
* If a {@code null} value is passed, the effect is the same as calling the
* {@link #removeProperty(String)} method.
*
*
* In a Servlet container, on the server side, the properties are backed by the
* {@code ServletRequest} and contain all the attributes available in the {@code ServletRequest}.
*
*
* @param name a {@code String} specifying the name of the property.
* @param object an {@code Object} representing the property to be bound.
*/
public void setProperty(String name, Object object);
/**
* Removes a property with the given name from the current request/response
* exchange context. After removal, subsequent calls to {@link #getProperty}
* to retrieve the property value will return {@code null}.
*
* In a Servlet container, on the server side, the properties are backed by the
* {@code ServletRequest} and contain all the attributes available in the {@code ServletRequest}.
*
*
* @param name a {@code String} specifying the name of the property to be removed.
*/
public void removeProperty(String name);
/**
* Get an array of the annotations formally declared on the artifact that
* initiated the intercepted entity provider invocation.
*
* E.g. if the message body is to be converted into a method parameter, this
* will be the annotations on that parameter returned by
* {@link java.lang.reflect.Method#getParameterAnnotations Method.getParameterAnnotations()};
* if the server-side response entity instance is to be converted into an
* output stream, this will be the annotations on the matched resource method
* returned by {@link java.lang.reflect.Method#getAnnotations() Method.getAnnotations()}.
*
* This method may return an empty array in case the interceptor is
* not invoked in a context of any particular resource method
* (e.g. as part of the client API), but will never return {@code null}.
*
* @return annotations declared on the artifact that initiated the intercepted
* entity provider invocation.
*/
public Annotation[] getAnnotations();
/**
* Update annotations on the formal declaration of the artifact that
* initiated the intercepted entity provider invocation.
*
* Calling this method has no effect in the client API.
*
* @param annotations updated annotations declarataion of the artifact that
* initiated the intercepted entity provider invocation.
* Must not be {@code null}.
* @throws NullPointerException in case the input parameter is {@code null}.
*/
public void setAnnotations(Annotation[] annotations);
/**
* Get Java type supported by corresponding message body provider.
*
* @return java type supported by provider
*/
Class getType();
/**
* Update Java type before calling message body provider.
*
* @param type java type for provider
*/
public void setType(Class type);
/**
* Get the type of the object to be produced or written.
*
* @return type of object produced or written
*/
Type getGenericType();
/**
* Update type of the object to be produced or written.
*
* @param genericType new type for object
*/
public void setGenericType(Type genericType);
/**
* Get media type of HTTP entity.
*
* @return media type of HTTP entity
*/
public MediaType getMediaType();
/**
* Update media type of HTTP entity.
*
* @param mediaType new type for HTTP entity
*/
public void setMediaType(MediaType mediaType);
}