AtmosFileDownloadResult.java

/**
 * 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.camel.component.atmos.dto;

import java.io.ByteArrayOutputStream;
import java.util.Map;

import org.apache.camel.Exchange;
import org.apache.camel.component.atmos.util.AtmosResultHeader;

public class AtmosFileDownloadResult extends AtmosResult {

    /**
     * Object payload contained in Exchange
     * In case of a single file Exchange Header is populated with the name of the remote path downloaded
     * In case of a multiple files Exchange Header is populated with the name of the remote paths downloaded
     * In case of a single file Exchange Body is populated with the ByteArrayOutputStream downloaded from atmos.
     * In case of multiple files Exchange Body is populated with a map containing as key the remote path
     * and as value the linked ByteArrayOutputStream
     * @param exchange
     */
    @Override
    public void populateExchange(Exchange exchange) {
        //in case we have only one baos put it directly in body
        Map<String, ByteArrayOutputStream> map = (Map<String, ByteArrayOutputStream>)resultEntries;
        if (map.size() == 1) {
            //set info in exchange
            String pathExtracted = null;
            ByteArrayOutputStream baosExtracted = null;
            for (Map.Entry<String, ByteArrayOutputStream> entry : map.entrySet()) {
                pathExtracted = entry.getKey();
                baosExtracted = entry.getValue();
            }
            exchange.getIn().setHeader(AtmosResultHeader.DOWNLOADED_FILE.name(), pathExtracted);
            exchange.getIn().setBody(baosExtracted);
        } else {
            StringBuffer pathsExtracted = new StringBuffer();
            for (Map.Entry<String, ByteArrayOutputStream> entry : map.entrySet()) {
                pathsExtracted.append(entry.getKey() + "\n");
            }
            exchange.getIn().setHeader(AtmosResultHeader.DOWNLOADED_FILES.name(), pathsExtracted.toString());
            exchange.getIn().setBody(map);
        }
    }
}