java-org.hwo/src/org/hwo/BitField.java

package org.hwo;

import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

public class BitField {

	private String[] labels;
	
	public BitField()
	{
		labels = new String[32];
		initialize();
	}

	public String[] getLabels()
	{
		return labels;
	}
	
	public BitField(Element element)
	{
		labels = new String[32];

		initialize();
		
		NodeList bits = element.getElementsByTagName("Bit");
		for (int i=0;i<bits.getLength();i++)
		{
			Element bit = (Element)bits.item(i);
			
			labels[ Integer.decode(bit.getAttribute("no")) ] = bit.getTextContent();
		}
	}
	
	private void initialize()
	{
		for (int i=0;i<32;i++)
			labels[i] = null;
	}
	
	public String toText(Integer value)
	{
		StringBuilder sb = new StringBuilder();
		
		if (value != null)
		for (int i=0;i<32;i++)
		{
			if (labels[i]!=null)
			if ((value & 1<<i) != 0)
			{
				if (sb.toString().length()>0)
					sb.append(", ");
				sb.append(labels[i]);
			}
		}
		
		return sb.toString();
	}
	
}