/*
 * Created on 27/06/2003
 *
 */
package net.sourceforge.phpdt.sql.view.bookmark;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collections;
import java.util.Vector;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;

import net.sourceforge.phpdt.sql.PHPEclipseSQLPlugin;
import net.sourceforge.phpdt.sql.sql.metadata.ObjectMetaData;

/**
 * GroupNode represents a level of grouping in the BookmarkView hierarchy
 * It will have categories like "TABLE", "VIEW" and so on, usually gotten from
 * the JDBC driver.
 * @author panic
 *
 */
public class GroupNode implements TreeNode, Comparable {
	private BookmarkNode parent = null;
	private Vector children = new Vector();
	private String name = null;
	private int size = -1;

	public GroupNode(BookmarkNode parent, String name) {
		this.parent = parent;
		this.name = name;
	}
	public ObjectMetaData getMetaData() {
		return null;	//no metadata
	}

	public boolean hasChildren() {
		if (children != null && children.size() > 0) {
			return true;
		}
		return false;
	}
	public Object[] getChildren() {
		return children.toArray();
	}

	public Object getParent() {
		return parent;
	}
	public String getName() {
		return name;
	}
	
	public String toString() {
		return name;
	}
	
	public void addChild(Object child)
	{
		if (!(child instanceof TreeNode)) return;
		if (name == "TABLE" && !(child instanceof TableNode)) return;
		if (name == "VIEW" && !(child instanceof ViewNode)) return;
		if (name == "SEQUENCE" && !(child instanceof SequenceNode)) return;
		children.add(child);
		Collections.sort(children);
	}

	public int compareTo(Object o) {
		if (o instanceof GroupNode) {
			GroupNode node = (GroupNode) o;
			return name.compareTo(node.getName());
		} 
		return 0;
	}
	/**
	 * @return an Image object to appear in the view
	 * @throws MalformedURLException
	 */
	public Image getImage() throws MalformedURLException {
		// We'll return an icon if it's part of the primary key
		URL installURL = PHPEclipseSQLPlugin.getDefault().getDescriptor().getInstallURL();
		URL url = null;	
		if (name == "TABLE") {
			url = new URL(installURL, "icons/greentable.gif"); //$NON-NLS-1$
		} else if (name == "VIEW") {
			url = new URL(installURL, "icons/view.gif"); //$NON-NLS-1$
		} else if (name == "SEQUENCE") {
			url = new URL(installURL, "icons/sequence.gif"); //$NON-NLS-1$
		}
		
		if (url != null) {
			ImageDescriptor descriptor = ImageDescriptor.createFromURL(url);
			return descriptor.createImage();
		} else
			return null;
	}


}