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/*
 * @(#)ContextList.java	1.4 07/01/02
 *
 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package sun.net.httpserver;

import java.util.*;
import com.sun.net.httpserver.*;
import com.sun.net.httpserver.spi.*;

class ContextList {

    final static int MAX_CONTEXTS = 50;
 
    LinkedList list = new LinkedList();

    public synchronized void add (HttpContextImpl ctx) {
	assert ctx.getPath() != null;
	list.add (ctx);
    }

    public synchronized int size () {
	return list.size();
    }

   /* initially contexts are located only by protocol:path. 
    * Context with longest prefix matches (currently case-sensitive)
    */
    synchronized HttpContextImpl findContext (String protocol, String path) {
	return findContext (protocol, path, false);
    }

    synchronized HttpContextImpl findContext (String protocol, String path, boolean exact) {
	protocol = protocol.toLowerCase();
	String longest = "";
	HttpContextImpl lc = null;
	for (HttpContextImpl ctx: list) {
	    if (!ctx.getProtocol().equals(protocol)) {
		continue;	
	    }
	    String cpath = ctx.getPath();
	    if (exact && !cpath.equals (path)) {
		continue;
	    } else if (!exact && !path.startsWith(cpath)) {
		continue;
	    }
	    if (cpath.length() > longest.length()) {
		longest = cpath;
		lc = ctx;
	    }
	}
	return lc;
    }

    public synchronized void remove (String protocol, String path) 
	throws IllegalArgumentException 
    {
	HttpContextImpl ctx = findContext (protocol, path, true);
	if (ctx == null) {
	    throw new IllegalArgumentException ("cannot remove element from list");
	}
	list.remove (ctx);
    }

    public synchronized void remove (HttpContextImpl context)
	throws IllegalArgumentException 
    {
	for (HttpContextImpl ctx: list) {
	    if (ctx.equals (context)) {
		list.remove (ctx);
		return;
	    }
	}
    	throw new IllegalArgumentException ("no such context in list");
    }
}