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package org.glassfish.jersey.server.model;

import javax.ws.rs.ConstrainedTo;
import javax.ws.rs.RuntimeType;
import javax.ws.rs.core.Configuration;

import org.glassfish.jersey.spi.Contract;

/**
 * Contract for a model processors that processes {@link ResourceModel resource models} during application initialization
 * and {@link Resource resource} returned by sub resource locators. Even though {@link ModelProcessor model processors} can
 * completely change the resource model, the standard use case it to enhance the current resource model by
 * additional methods and resources (like for example adding OPTIONS http methods for every URI endpoint).
 * 

* More model processors can be registered. These providers will be execute in the chain so that each model * processor will be executed with resource model processed by the previous model processor. The first model * processor in the chain will be invoked with the initial resource model from which the application was initiated. *

* Model processors implementations can define {@link javax.annotation.Priority binding priority} * to define the order in which they are executed (processors with a lower priority is invoked * before processor with a higher priority). The highest possible priority (Integer.MAX_VALUE) is used for * model processor which enhance resource models by the default OPTIONS method defined by JAX-RS specification and therefore * this priority should not be used. *

* Note that if model processor adds a resources that are intended to be supportive resources like * {@code OPTIONS} method providing information about the resource, it should properly define the * {@link org.glassfish.jersey.server.model.ResourceMethod#isExtended() extended} flag of such a new method. * See {@link org.glassfish.jersey.server.model.ExtendedResource} for more information. * * @author Miroslav Fuksa * */ @Contract @ConstrainedTo(RuntimeType.SERVER) public interface ModelProcessor { /** * Process {@code resourceModel} and return the processed model. Returning input {@code resourceModel} will cause * no effect on the final resource model. * * @param resourceModel Input resource model to be processed. * @param configuration Runtime configuration. * @return Processed resource model containing root resources. Non root resources will be ignored. */ public ResourceModel processResourceModel(ResourceModel resourceModel, Configuration configuration); /** * Process {@code subResourceModel} which was returned a sub resource locator. *

* The {@code subResourceModel} contains only one {@link Resource resource} representing model that should be processed * by further matching. The method must return also exactly one resource in the model. Returning input * {@code subResourceModel} instance will cause no effect on the final sub resource model. * * @param subResourceModel {@link Resource Sub resource} which is based on sub resource returned from sub resource locator. * @param configuration Runtime configuration. * @return Processed resource model with one {@link Resource resource} which should be used for handling sub resource. */ public ResourceModel processSubResource(ResourceModel subResourceModel, Configuration configuration); }





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