/*******************************************************************************
 * Copyright (c) 2015 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public
 * License v3.0 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * Contributors:
 * Jeff Martin - initial API and implementation
 ******************************************************************************/

package cuchaz.enigma.convert;

import com.google.common.collect.Maps;
import cuchaz.enigma.TranslatingTypeLoader;
import cuchaz.enigma.analysis.JarIndex;
import cuchaz.enigma.convert.ClassNamer.SidedClassNamer;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.Translator;
import javassist.CtClass;

import java.util.Map;
import java.util.jar.JarFile;

public class ClassIdentifier {

	private JarIndex index;
	private SidedClassNamer namer;
	private boolean useReferences;
	private TranslatingTypeLoader loader;
	private Map<ClassEntry, ClassIdentity> cache;

	public ClassIdentifier(JarFile jar, JarIndex index, SidedClassNamer namer, boolean useReferences) {
		this.index = index;
		this.namer = namer;
		this.useReferences = useReferences;
		this.loader = new TranslatingTypeLoader(jar, index, new Translator(), new Translator());
		this.cache = Maps.newHashMap();
	}

	public ClassIdentity identify(ClassEntry classEntry)
		throws ClassNotFoundException {
		ClassIdentity identity = this.cache.get(classEntry);
		if (identity == null) {
			CtClass c = this.loader.loadClass(classEntry.getName());
			if (c == null) {
				throw new ClassNotFoundException(classEntry.getName());
			}
			identity = new ClassIdentity(c, this.namer, this.index, this.useReferences);
			this.cache.put(classEntry, identity);
		}
		return identity;
	}
}