gov.nih.nci.cagrid.portal.portlet.workflow.util.Utils.java Source code

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Here is the source code for gov.nih.nci.cagrid.portal.portlet.workflow.util.Utils.java

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/**
*============================================================================
*  The Ohio State University Research Foundation, The University of Chicago -
*  Argonne National Laboratory, Emory University, SemanticBits LLC, 
*  and Ekagra Software Technologies Ltd.
*
*  Distributed under the OSI-approved BSD 3-Clause License.
*  See http://ncip.github.com/cagrid-workflow/LICENSE.txt for details.
*============================================================================
**/
package gov.nih.nci.cagrid.portal.portlet.workflow.util;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * Utils
 * TODO type-comment Utils
 * @author Marek Kedzierski (kedzie@ci.uchicago.edu)
 * @created Apr 2, 2011 - 2011
 */
public class Utils implements ApplicationContextAware {
    private static final Log log = LogFactory.getLog(Utils.class);

    @Autowired
    private ApplicationContext applicationContext;
    private HttpClient http = new DefaultHttpClient();

    /**
     * Download a file
     * @param uri address of file to download
     * @return file contents
     * @throws IOException 
     */
    public byte[] download(String uri) throws IOException {
        log.debug("Downloading File: " + uri);
        HttpGet get = new HttpGet(uri);
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String body = http.execute(get, responseHandler);
        return body.getBytes();
    }

    /**
     * Write binary data to filesystem; creating all necessary subfolders.
     * @param filename the filename
     * @param contents file contents
     */
    public void saveFile(String filename, byte[] contents) throws IOException {
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(filename);
            fos.write(contents);
            log.debug("Wrote" + contents.length + " bytes to: " + filename);
        } catch (FileNotFoundException e) {
        } finally {
            if (fos != null)
                fos.close();
        }
    }

    public ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public void setApplicationContext(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }
}