org.solmix.datax.xmlfile.XmlFileDataService.java Source code

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Here is the source code for org.solmix.datax.xmlfile.XmlFileDataService.java

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/*
 * Copyright 2014 The Solmix Project
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.gnu.org/licenses/ 
 * or see the FSF site: http://www.fsf.org. 
 */
package org.solmix.datax.xmlfile;

import java.io.InputStream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.jxpath.JXPathContext;
import org.solmix.commons.collections.DataTypeMap;
import org.solmix.commons.util.DOMUtils;
import org.solmix.datax.DSCallException;
import org.solmix.datax.DSRequest;
import org.solmix.datax.DSResponse;
import org.solmix.datax.model.DataServiceInfo;
import org.solmix.datax.model.OperationInfo;
import org.solmix.datax.support.BaseDataService;
import org.solmix.datax.support.DSResponseImpl;
import org.solmix.runtime.Container;
import org.solmix.runtime.resource.InputStreamResource;
import org.solmix.runtime.resource.ResourceManager;

/**
 * 
 * @author solmix.f@gmail.com
 * @version $Id$  201584
 */

public class XmlFileDataService extends BaseDataService {

    public XmlFileDataService(DataServiceInfo info, Container container, DataTypeMap prop) {
        super(info, container, prop);
    }

    @Override
    public String getServerType() {
        return XmlFileDataServiceFactory.BASE;
    }

    @Override
    protected DSResponse executeFetch(DSRequest req) throws DSCallException {
        OperationInfo oi = req.getOperationInfo();
        Object dataUrl = oi.getProperty("dataUrl");

        Object recordXPath = oi.getProperty("recordXPath");
        DSResponseImpl res = new DSResponseImpl(this, req);
        Object value = getDataFromFile(dataUrl);
        if (recordXPath != null) {
            JXPathContext context = JXPathContext.newContext(value);
            res.setRawData(context.getValue(recordXPath.toString()));
        } else {
            res.setRawData(value);
        }
        return res;
    }

    /**
     * @param dataUrl
     * @return
     * @throws DSCallException 
     */
    private Object getDataFromFile(Object dataUrl) throws DSCallException {
        if (dataUrl == null) {
            return null;
        }
        InputStream is = null;
        try {
            ResourceManager rm = getContainer().getExtension(ResourceManager.class);
            if (rm != null) {
                InputStreamResource isr = rm.getResourceAsStream(dataUrl.toString());
                is = isr.getInputStream();
                return DOMUtils.getValue(is);
            }

        } catch (Exception e) {
            throw new DSCallException("Parse xml failed:", e);
        } finally {
            if (is != null)
                IOUtils.closeQuietly(is);
        }
        return null;
    }

}