javaapplication3.TimeDataXmlWorker.java Source code

Introduction

Here is the source code for javaapplication3.TimeDataXmlWorker.java

Source

/*
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package javaapplication3;

import java.util.Iterator;
import java.io.File;
import java.nio.ShortBuffer;
import org.dom4j.Element;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author blobby
 */
public class TimeDataXmlWorker {

    public void setFileParams(String file_name, int mem_shift) {
        file_name_ = file_name;
        mem_shift_ = mem_shift;
        last_change_timestamp_ = getChangeTimeStamp();

        System.out.println("getChangeTimeStamp() to time file = " + last_change_timestamp_);
        System.out.println("file_name = " + file_name);
    }

    public ShortBuffer upDateData(ShortBuffer mem_data) {

        //System.out.println("in update last_change_timestamp_ = " + last_change_timestamp_);
        //System.out.println("in update getChangeTimeStamp()   = " + getChangeTimeStamp());

        if (last_change_timestamp_ < getChangeTimeStamp()) {
            try {
                //System.out.println("some new data in XML");
                ShortBuffer cur_data = getXmlData(mem_data);
                last_change_timestamp_ = getChangeTimeStamp();
                return cur_data;
            } catch (Exception ex) {
                System.out.println("Exception in time data update: " + ex.getMessage());
            }

        }

        return mem_data;
    }

    private ShortBuffer getXmlData(ShortBuffer mem_data) {

        ShortBuffer exitData = ShortBuffer.allocate(mem_data.limit());
        exitData.put(mem_data.array());

        //for (char ii = 0; ii < exitData.limit(); ii++){
        //    System.out.println("exitData[" + ii + "]=" + exitData.get(ii));
        //}

        SAXReader reader = new SAXReader();

        File f = new File(file_name_);

        if (!f.exists()) {
            System.out.println("no time data file " + file_name_);
        }

        try {
            Document document = reader.read(f);

            Element root = document.getRootElement();

            // iterate through child elements of root
            for (Iterator i = root.elementIterator(); i.hasNext();) {
                Element element = (Element) i.next();

                //System.out.println("addr[ " + element.attributeValue("addr") + "] = " + element.attributeValue("value"));

                int mem_adr = Integer.parseInt(element.attributeValue("addr")) - mem_shift_;
                if (mem_adr < mem_data.limit())
                    exitData.put(mem_adr, Short.parseShort(element.attributeValue("value")));

            }

            return exitData;
        } catch (DocumentException ex) {
            System.out.println("Exeption: " + ex.getMessage());
            Logger.getLogger(DataXmlWorker.class.getName()).log(Level.SEVERE, null, ex);
        }

        return exitData;
    }

    private long getChangeTimeStamp() {
        return new File(file_name_).lastModified();
    }

    // FIELDS
    private String file_name_;
    private long last_change_timestamp_;
    private int mem_shift_;

}