/*
 * Created on 30.7.2004
 *
 */
package net.sf.tomp.xml.id;

import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;

/**
 * @author tomp
 *  
 */
public class SimpleIdGetterSetter implements IdGetterSetter {

    /** SAX localname of the ID attribute */
    public final String idLocalName;

    /** NS of the ID attribute */
    public final String idNS;

    /** NS prefix of the ID attribute */
    public final String idNSPrefix;

    protected String getId(Attributes atts) {
        return atts.getValue(idNS, idLocalName);
    }

    protected int getIdIndex(Attributes atts) {
        return atts.getIndex(idNS, idLocalName);
    }

    public SimpleIdGetterSetter() {
        this("id");
    }

    public SimpleIdGetterSetter(String localName) {
        this("", localName);
    }

    public SimpleIdGetterSetter(String ns, String localName) {
        this(ns, localName, "");
    }

    public SimpleIdGetterSetter(String ns, String localName, String nsPrefix) {
        idNS = ns;
        idLocalName = localName;
        idNSPrefix = nsPrefix;
    }

    public String getId(Element e) {
        return getId(e.getAttributes());
    }

    /*
     * (non-Javadoc)
     * 
     * @see net.sf.tomp.docbook.sax.IDGetter#setId(org.xml.sax.Attributes,
     *      java.lang.String)
     */
    public Attributes setId(Attributes atts, String newId) {
        AttributesImpl atts2 = new AttributesImpl(atts);
        int idIndex = getIdIndex(atts2);
        if (idIndex > -1) {
            // remove old is if exists
            atts2.removeAttribute(idIndex);
        }
        //add new id
        if (idNSPrefix == null || idNSPrefix.length() == 0) {
            atts2.addAttribute(idNS, idLocalName, idLocalName, "CDATA", newId);
        } else {
            atts2.addAttribute(idNS, idLocalName, idNSPrefix + ":"
                    + idLocalName, "CDATA", newId);
        }
        return atts2;
    }
}