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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.cxf.ws.security.wss4j;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.cxf.binding.soap.SoapMessage;
import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.message.MessageUtils;
import org.apache.cxf.service.model.EndpointInfo;
import org.apache.cxf.ws.security.cache.ReplayCacheFactory;
import org.apache.ws.security.WSSecurityEngineResult;
import org.apache.ws.security.cache.ReplayCache;

/**
 * Some common functionality that can be shared between the WSS4JInInterceptor and the
 * UsernameTokenInterceptor.
 */
public final class WSS4JUtils {

    private WSS4JUtils() {
        // complete
    }

    /**
     * Get a ReplayCache instance. It first checks to see whether caching has been explicitly 
     * enabled or disabled via the booleanKey argument. If it has been set to false then no
     * replay caching is done (for this booleanKey). If it has not been specified, then caching
     * is enabled only if we are not the initiator of the exchange. If it has been specified, then
     * caching is enabled.
     * 
     * It tries to get an instance of ReplayCache via the instanceKey argument from a 
     * contextual property, and failing that the message exchange. If it can't find any, then it
     * defaults to using an EH-Cache instance and stores that on the message exchange.
     */
    public static ReplayCache getReplayCache(
        SoapMessage message, String booleanKey, String instanceKey
    ) {
        boolean specified = false;
        Object o = message.getContextualProperty(booleanKey);
        if (o != null) {
            if (!MessageUtils.isTrue(o)) {
                return null;
            }
            specified = true;
        }

        if (!specified && MessageUtils.isRequestor(message)) {
            return null;
        }
        Endpoint ep = message.getExchange().get(Endpoint.class);
        if (ep != null && ep.getEndpointInfo() != null) {
            EndpointInfo info = ep.getEndpointInfo();
            synchronized (info) {
                ReplayCache replayCache = 
                        (ReplayCache)message.getContextualProperty(instanceKey);
                if (replayCache == null) {
                    replayCache = (ReplayCache)info.getProperty(instanceKey);
                }
                if (replayCache == null) {
                    ReplayCacheFactory replayCacheFactory = ReplayCacheFactory.newInstance();
                    String cacheKey = instanceKey;
                    if (info.getName() != null) {
                        cacheKey += "-" + info.getName().toString().hashCode();
                    }
                    replayCache = replayCacheFactory.newReplayCache(cacheKey, message);
                    info.setProperty(instanceKey, replayCache);
                }
                return replayCache;
            }
        }
        return null;
    }

    /**
     * Fetch the result of a given action from a given result list.
     * 
     * @param resultList The result list to fetch an action from
     * @param action The action to fetch
     * @return The result fetched from the result list, null if the result
     *         could not be found
     */
    public static List fetchAllActionResults(
        List resultList,
        int action
    ) {
        return fetchAllActionResults(resultList, Collections.singletonList(action));
    }
    
    /**
     * Fetch the results of a given number of actions action from a given result list.
     * 
     * @param resultList The result list to fetch an action from
     * @param actions The list of actions to fetch
     * @return The list of matching results fetched from the result list
     */
    public static List fetchAllActionResults(
        List resultList,
        List actions
    ) {
        List actionResultList = Collections.emptyList();
        if (actions == null || actions.isEmpty()) {
            return actionResultList;
        }
        
        for (WSSecurityEngineResult result : resultList) {
            //
            // Check the result of every action whether it matches the given action
            //
            int resultAction = 
                ((java.lang.Integer)result.get(WSSecurityEngineResult.TAG_ACTION)).intValue();
            if (actions.contains(resultAction)) {
                if (actionResultList.isEmpty()) {
                    actionResultList = new ArrayList();
                }
                actionResultList.add(result);
            }
        }
        return actionResultList;
    }

}




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