/**
* Helios, OpenSource Monitoring
* Brought to you by the Helios Development Group
*
* Copyright 2007, Helios Development Group and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
*/
package org.helios.apmrouter.catalog.api.impl;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.util.HashMap;
import java.util.Map;
/**
* <p>Title: ParsedFactory</p>
* <p>Description: Factory static methods for creating objects for the JSONQueryParser</p>
* <p>Company: Helios Development Group LLC</p>
* @author Whitehead (nwhitehead AT heliosdev DOT org)
* <p><code>org.helios.apmrouter.catalog.api.impl.ParsedFactory</code></p>
*/
public class ParsedFactory {
protected static final Map<String, MethodHandle> primary = new HashMap<String, MethodHandle>();
static {
generateHandle("q", Query.class);
}
private static void generateHandle(String key, Class<? extends Parsed> clazz) {
try {
MethodType desc = MethodType.methodType(clazz, new Class[]{});
MethodHandle mh = MethodHandles.lookup().findStatic(clazz, "create", desc);
primary.put(key, mh);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public static Parsed createPrimary(String key) {
try {
MethodHandle mh = primary.get(key.trim().toLowerCase());
if(mh==null) throw new Exception("No handler found for key [" + key + "]", new Throwable());
return (Parsed) mh.invoke();
} catch (Throwable ex) {
throw new RuntimeException(ex);
}
}
}