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package javax.ws.rs.ext;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collection;

import javax.ws.rs.core.MediaType;

/**
 * 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 JAX-RS 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 JAX-RS 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); }




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