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/*
 * SecurityContextToken.java
 */

package com.sun.xml.ws.security.impl.policy;

import com.sun.xml.ws.policy.AssertionSet;
import com.sun.xml.ws.policy.NestedPolicy;
import com.sun.xml.ws.policy.PolicyAssertion;
import com.sun.xml.ws.policy.sourcemodel.AssertionData;
import com.sun.xml.ws.security.policy.SecurityAssertionValidator;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import static com.sun.xml.ws.security.impl.policy.Constants.*;
import javax.xml.namespace.QName;

/**
 *
 * @author Mayank.Mishra@Sun.com
 */
public class SecurityContextToken extends PolicyAssertion implements com.sun.xml.ws.security.policy.SecurityContextToken, SecurityAssertionValidator{
    private String id;
    private List<String> tokenRefType;
    private boolean populated = false;
    private String tokenType;
    private String includeTokenType = Token.INCLUDE_ALWAYS;
    private PolicyAssertion rdKey = null;
    private Set<String> referenceType = null;
    private static QName itQname = new QName(Constants.SECURITY_POLICY_NS, Constants.IncludeToken);
    private AssertionFitness fitness = AssertionFitness.IS_VALID;
    /** Creates a new instance of SecurityContextToken */
    public SecurityContextToken(AssertionData name,Collection<PolicyAssertion> nestedAssertions, AssertionSet nestedAlternative) {
        super(name,nestedAssertions,nestedAlternative);
        UUID id = UUID.randomUUID();
        this.id = id.toString();
    }
    
    public String getTokenType() {
        populate();
        return tokenType;
    }
    
    public Iterator getTokenRefernceType() {
        if ( tokenRefType != null ) {
            return tokenRefType.iterator();
        } else {
            return Collections.emptyList().iterator();
        }
    }
    
    public boolean isRequireDerivedKeys() {
        populate();
        if (rdKey != null ) {
            return true;
        }
        return false;
    }
    
    public String getIncludeToken() {
        populate();
        return includeTokenType;
    }
    
    
    public String getTokenId() {
        return id;
    }
    
    
    public AssertionFitness validate(boolean isServer) {
        return populate(isServer);
    }
    private void populate(){
        populate(false);
    }
    
    private synchronized AssertionFitness populate(boolean isServer) {
        if(!populated){
            NestedPolicy policy = this.getNestedPolicy();
            if(this.getAttributeValue(itQname) != null){
                includeTokenType = this.getAttributeValue(itQname);
            }
            if(policy == null){
                if(logger.getLevel() == Level.FINE){
                    logger.log(Level.FINE,"NestedPolicy is null");
                }
                populated = true;
                return fitness;
            }
            AssertionSet as = policy.getAssertionSet();
            Iterator<PolicyAssertion> paItr = as.iterator();
            
            while(paItr.hasNext()){
                PolicyAssertion assertion  = paItr.next();
                if(PolicyUtil.isSecurityContextTokenType(assertion)){
                    tokenType = assertion.getName().getLocalPart().intern();
                }else if(PolicyUtil.isRequireDerivedKeys(assertion)){
                    rdKey = assertion;
                }else if(PolicyUtil.isRequireExternalUriReference(assertion)){
                    if(referenceType == null){
                        referenceType =new HashSet<String>();
                    }
                    referenceType.add(assertion.getName().getLocalPart().intern());
                } else{
                    if(!assertion.isOptional()){
                        if(logger.getLevel() == Level.SEVERE){
                            logger.log(Level.SEVERE,"SP0100.invalid.security.assertion",new Object[]{assertion,"SecurityContextToken"});
                        }
                        if(isServer){
                            throw new UnsupportedPolicyAssertion("Policy assertion "+
                                    assertion+" is not supported under SecurityContextToken assertion");
                        }
                    }
                }
            }
            populated = true;
        }
        return fitness;
    }
    
}