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wsit » com » sun » xml » ws » policy » spi » PolicyAssertionCreator.java
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package com.sun.xml.ws.policy.spi;

import com.sun.xml.ws.policy.AssertionSet;
import com.sun.xml.ws.policy.PolicyAssertion;
import com.sun.xml.ws.policy.sourcemodel.AssertionData;
import java.util.Collection;

 * The interface defines contract for custom (domain specific) policy assertion 
 * factories. The implementations are discovered using service provider mechanism 
 * described in the 
 * <a href="http://java.sun.com/j2se/1.5.0/docs/guide/jar/jar.html#Service%20Provider">J2SE JAR File Specification</a>.
 * Every implementation of policy assertion creator is expected to <b>fully</b> 
 * handle the creation of assertions for the domain (namespace) it claims to 
 * support by returning the namespace string from the {link #getSupportedDomainNamespaceUri()} 
 * method. To handle creation of domain-specific assertions that are not intended 
 * to be customized, the default policy assertion creator (passed as one of the 
 * input parameters into the {@link #createAssertion(AssertionData, Collection, AssertionSet, PolicyAssertionCreator)} method) 
 * shall be used.
 * @author Marek Potociar
public interface PolicyAssertionCreator {
     * This method returns the namespace URIs of the domains that are supported by the implementation of
     * this inteface. There can be multiple URIs supported per single implementation.
     * <p/>
     * Supporting domain namespace URI means that particular {@code PolicyAssertionCreator} implementation
     * is able to create assertion instances for the domains identified by the namespace URIs returned from this
     * method. It is required that each {@code PolicyAssertionCreator} implementation handles the policy
     * assertion creation for <b>each</b> assertion in every domain it claims to support.
     * @return string array representing the namespace URIs of the supported domains. It is expected that multiple calls on this method return the 
     * same value each time. <b>Returned string array must be neither {@code null} nor empty. Also each string value in the array must not be {@code null} 
     * nor empty.</b>
    String[] getSupportedDomainNamespaceURIs();
     * Creates domain-specific policy assertion instance according to assertion data provided. For the provided
     * assertion data and this policy assertion creator instance, it will allways be true that assertion namespace 
     * URI equals to one of supported domain namespace URIs.
     * Additional method parameter (which must not be {@code null}) supplied by the policy framework specifies a default policy
     * assertion creator that might be used to handle creation of unsupported domain assertion in the default way. This is
     * to give policy assertion creator a chance to handle also creation of "unsupported" domain assertions and to encourage
     * implemetors to use class composition instad of class inheritance.
     * @param data assertion creation data specifying the details of newly created assertion
     * @param assertionParameters collection of assertions parameters of this policy assertion. May be {@code null}.
     * @param nestedAlternative assertion set specifying nested policy alternative. May be {@code null}.
     * @param defaultCreator default policy assertion creator implementation that shall be used to handle creation of assertions
     * which are not explicitly supported by this policy assertion creator implementation
     * @return domain specific policy assertion implementation according to assertion data provided.
     * @throws AssertionCreationException in case of assertion creation failure
    PolicyAssertion createAssertion(AssertionData data, Collection<PolicyAssertion> assertionParameters, AssertionSet nestedAlternative, PolicyAssertionCreator defaultCreator) throws AssertionCreationException;
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