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/*
 * Licensed to the University Corporation for Advanced Internet Development,
 * Inc. (UCAID) under one or more contributor license agreements.  See the
 * NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The UCAID 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.opensaml.soap.client.messaging;

import java.util.function.Function;

import javax.annotation.Nullable;

import org.opensaml.messaging.context.InOutOperationContext;
import org.opensaml.messaging.context.MessageContext;
import org.opensaml.soap.client.SOAPClientContext;

/**
 * Function which resolves and returns the intended SOAP client message destination URI
 * via the {@link SOAPClientContext#getDestinationURI()} of the message context's
 * parent {@link InOutOperationContext}.
 */
public class SOAPClientDestinationURILookup implements Function {

    /** {@inheritDoc} */
    @Nullable public String apply(@Nullable final MessageContext messageContext) {
        if (messageContext == null) {
            return null;
        }
        
        if (!(messageContext.getParent() instanceof InOutOperationContext)) {
            return null;
        }
        
        final InOutOperationContext opContext = (InOutOperationContext) messageContext.getParent();
        
        if (opContext.getSubcontext(SOAPClientContext.class) == null) {
            return null;
        }
        return opContext.getSubcontext(SOAPClientContext.class).getDestinationURI();
    }

}