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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.wss4j.policy.model;

import org.apache.neethi.Assertion;
import org.apache.neethi.Policy;
import org.apache.neethi.PolicyComponent;
import org.apache.neethi.PolicyContainingAssertion;
import org.apache.wss4j.policy.SPConstants;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import java.util.Iterator;
import java.util.List;

public class Trust10 extends AbstractSecurityAssertion implements PolicyContainingAssertion {

    private Policy nestedPolicy;
    private boolean mustSupportClientChallenge;
    private boolean mustSupportServerChallenge;
    private boolean requireClientEntropy;
    private boolean requireServerEntropy;
    private boolean mustSupportIssuedTokens;

    public Trust10(SPConstants.SPVersion version, Policy nestedPolicy) {
        super(version);
        this.nestedPolicy = nestedPolicy;

        parseNestedTrust10Policy(nestedPolicy, this);
    }

    @Override
    public Policy getPolicy() {
        return nestedPolicy;
    }

    @Override
    public QName getName() {
        return getVersion().getSPConstants().getTrust10();
    }

    @Override
    public boolean equals(Object object) {
        if (object == this) {
            return true;
        }
        if (!(object instanceof Trust10)) {
            return false;
        }

        Trust10 that = (Trust10)object;
        if (mustSupportClientChallenge != that.mustSupportClientChallenge
            || mustSupportServerChallenge != that.mustSupportServerChallenge
            || requireClientEntropy != that.requireClientEntropy
            || requireServerEntropy != that.requireServerEntropy
            || mustSupportIssuedTokens != that.mustSupportIssuedTokens) {
            return false;
        }

        return super.equals(object);
    }

    @Override
    public int hashCode() {
        int result = 17;
        result = 31 * result + Boolean.hashCode(mustSupportClientChallenge);
        result = 31 * result + Boolean.hashCode(mustSupportServerChallenge);
        result = 31 * result + Boolean.hashCode(requireClientEntropy);
        result = 31 * result + Boolean.hashCode(requireServerEntropy);
        result = 31 * result + Boolean.hashCode(mustSupportIssuedTokens);

        return 31 * result + super.hashCode();
    }

    @Override
    public PolicyComponent normalize() {
        return super.normalize(getPolicy());
    }

    @Override
    public void serialize(XMLStreamWriter writer) throws XMLStreamException {
        super.serialize(writer, getPolicy());
    }

    @Override
    protected AbstractSecurityAssertion cloneAssertion(Policy nestedPolicy) {
        return new Trust10(getVersion(), nestedPolicy);
    }

    protected void parseNestedTrust10Policy(Policy nestedPolicy, Trust10 trust10) {
        Iterator> alternatives = nestedPolicy.getAlternatives();
        //we just process the first alternative
        //this means that if we have a compact policy only the first alternative is visible
        //in contrary to a normalized policy where just one alternative exists
        if (alternatives.hasNext()) {
            List assertions = alternatives.next();
            for (Assertion assertion : assertions) {
                String assertionName = assertion.getName().getLocalPart();
                String assertionNamespace = assertion.getName().getNamespaceURI();

                QName mustSupportClientChallenge = getVersion().getSPConstants().getMustSupportClientChallenge();
                if (mustSupportClientChallenge.getLocalPart().equals(assertionName)
                    && mustSupportClientChallenge.getNamespaceURI().equals(assertionNamespace)) {
                    if (trust10.isMustSupportClientChallenge()) {
                        throw new IllegalArgumentException(SPConstants.ERR_INVALID_POLICY);
                    }
                    trust10.setMustSupportClientChallenge(true);
                    continue;
                }

                QName mustSupportServerChallenge = getVersion().getSPConstants().getMustSupportServerChallenge();
                if (mustSupportServerChallenge.getLocalPart().equals(assertionName)
                    && mustSupportServerChallenge.getNamespaceURI().equals(assertionNamespace)) {
                    if (trust10.isMustSupportServerChallenge()) {
                        throw new IllegalArgumentException(SPConstants.ERR_INVALID_POLICY);
                    }
                    trust10.setMustSupportServerChallenge(true);
                    continue;
                }

                QName requireClientEntropy = getVersion().getSPConstants().getRequireClientEntropy();
                if (requireClientEntropy.getLocalPart().equals(assertionName)
                    && requireClientEntropy.getNamespaceURI().equals(assertionNamespace)) {
                    if (trust10.isRequireClientEntropy()) {
                        throw new IllegalArgumentException(SPConstants.ERR_INVALID_POLICY);
                    }
                    trust10.setRequireClientEntropy(true);
                    continue;
                }

                QName requireServerEntropy = getVersion().getSPConstants().getRequireServerEntropy();
                if (requireServerEntropy.getLocalPart().equals(assertionName)
                    && requireServerEntropy.getNamespaceURI().equals(assertionNamespace)) {
                    if (trust10.isRequireServerEntropy()) {
                        throw new IllegalArgumentException(SPConstants.ERR_INVALID_POLICY);
                    }
                    trust10.setRequireServerEntropy(true);
                    continue;
                }

                QName mustSupportIssuedTokens = getVersion().getSPConstants().getMustSupportIssuedTokens();
                if (mustSupportIssuedTokens.getLocalPart().equals(assertionName)
                    && mustSupportIssuedTokens.getNamespaceURI().equals(assertionNamespace)) {
                    if (trust10.isMustSupportIssuedTokens()) {
                        throw new IllegalArgumentException(SPConstants.ERR_INVALID_POLICY);
                    }
                    trust10.setMustSupportIssuedTokens(true);
                    continue;
                }
            }
        }
    }

    public boolean isMustSupportClientChallenge() {
        return mustSupportClientChallenge;
    }

    protected void setMustSupportClientChallenge(boolean mustSupportClientChallenge) {
        this.mustSupportClientChallenge = mustSupportClientChallenge;
    }

    public boolean isMustSupportServerChallenge() {
        return mustSupportServerChallenge;
    }

    protected void setMustSupportServerChallenge(boolean mustSupportServerChallenge) {
        this.mustSupportServerChallenge = mustSupportServerChallenge;
    }

    public boolean isRequireClientEntropy() {
        return requireClientEntropy;
    }

    protected void setRequireClientEntropy(boolean requireClientEntropy) {
        this.requireClientEntropy = requireClientEntropy;
    }

    public boolean isRequireServerEntropy() {
        return requireServerEntropy;
    }

    protected void setRequireServerEntropy(boolean requireServerEntropy) {
        this.requireServerEntropy = requireServerEntropy;
    }

    public boolean isMustSupportIssuedTokens() {
        return mustSupportIssuedTokens;
    }

    protected void setMustSupportIssuedTokens(boolean mustSupportIssuedTokens) {
        this.mustSupportIssuedTokens = mustSupportIssuedTokens;
    }
}