/*
 * 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 echo.provider.policy;

import org.apache.tuscany.sca.policy.PolicySet;

/**
 * Sample policy handler 
 */
public class EncryptionPolicyHandler implements PolicyHandler {

    public void applyPolicy(Object msg, PolicySet policySet) throws Exception {
        for (Object aPolicy : policySet.getPolicies()) {
            if (aPolicy instanceof EchoBindingEncryptionPolicy) {
                encrypt(msg, (EchoBindingEncryptionPolicy)aPolicy);
            }
        }
    }

    private void encrypt(Object msg, EchoBindingEncryptionPolicy policy) throws Exception {
        if (!policy.isUnresolved() && msg instanceof Object[]) {
            EncryptionStrategy strategy = policy.getStrategyClass().newInstance();
            Object[] msgArgs = (Object[])msg;
            for (int count = 0; count < msgArgs.length; ++count) {
                msgArgs[count] = strategy.encryptMessage(msgArgs[count]);
            }
        }

    }

}