/**************************************************************************
 * DomainPath.java
 *
 * $Revision: 1.22 $
 * $Date: 2005/10/13 08:15:00 $
 *
 * Copyright (C) 2001 CERN - European Organization for Nuclear Research
 * All rights reserved.
 **************************************************************************/

package com.c2kernel.lookup;

import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.process.Gateway;


/**
* @version $Revision: 1.22 $ $Date: 2005/10/13 08:15:00 $
* @author  $Author: abranson $
**/
public class DomainPath extends Path
{
    private ItemPath target = null;
    protected static String mTypeRoot;

/* Very simple extension to Path. Only copies constructors and defines root */

    public DomainPath()
    {
        super(Path.UNKNOWN);
    }

    public DomainPath(short type)
    {
        super();
        mType = type;
    }

    public DomainPath(String[] path)
    {
        super(path, Path.UNKNOWN);
    }

    public DomainPath(String path)
    {
        super(path, Path.UNKNOWN);
    }

    public DomainPath(String path, ItemPath entity)
    {
        super(path, Path.UNKNOWN);
        setEntity(entity);
    }

    public DomainPath(DomainPath parent, String child) {
        super(parent, child);
    }

    /* the root of domain paths is /domain
     * clearly
    */
    @Override
	public String getRoot() {
        return "domain";
    }

    public DomainPath getParent() {
        if (mPath.length == 0)
            return null;

        String[] parentPath = new String[mPath.length-1];
        System.arraycopy(mPath, 0, parentPath, 0, parentPath.length);
        return new DomainPath(parentPath);
    }

    public void setEntity(ItemPath newTarget) {
        if (newTarget == null) { // clear
            target = null;
            mType = Path.CONTEXT;
            return;
        }

        target = newTarget;
        mType = Path.ENTITY;
    }

    @Override
	public ItemPath getItemPath() throws ObjectNotFoundException {
        if (mType == UNKNOWN) { // must decide
            checkType();
        }

        if (target == null)
            throw new ObjectNotFoundException("Path "+toString()+" does not resolve to an Item", "");
        return target;
    }

    @Override
	public short getType() {
        if (mType == UNKNOWN) { // must decide
            checkType();
        }
        return mType;
    }

    public void checkType() {
        try {
		    setEntity(Gateway.getLookup().resolvePath(this));
        } catch (InvalidItemPathException ex) {
            mType = CONTEXT;
        } catch (ObjectNotFoundException ex) {
            mType = CONTEXT;
        }

    }

    /**
     * Retrieves the domkey of the path
     * @return the last path component;
     */
    public String getName() {
    	return mPath[mPath.length-1];
    }
}