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Luaj 3.0-beta1 for the jse platform
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/*******************************************************************************
* Copyright (c) 2011 Luaj.org. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
package org.luaj.vm2.lib.jse;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.luaj.vm2.LuaValue;

/**
 * LuaValue that represents a Java class.
 * 
 * Will respond to get() and set() by returning field values, or java methods. 
 * 

 * This class is not used directly.  
 * It is returned by calls to {@link CoerceJavaToLua#coerce(Object)} 
 * when a Class is supplied.
 * @see CoerceJavaToLua
 * @see CoerceLuaToJava
 */
class JavaClass extends JavaInstance implements CoerceJavaToLua.Coercion {

	static final Map classes = Collections.synchronizedMap(new HashMap());

	static final LuaValue NEW = valueOf("new");
	
	Map fields;
	Map methods;
	
	static JavaClass forClass(Class c) {
		JavaClass j = (JavaClass) classes.get(c);
		if ( j == null )
			classes.put( c, j = new JavaClass(c) );
		return j;
	}
	
	JavaClass(Class c) {
		super(c);
		this.jclass = this;
	}

	public LuaValue coerce(Object javaValue) {
		return this;
	}
		
	Field getField(LuaValue key) {
		if ( fields == null ) {
			Map m = new HashMap();
			Field[] f = ((Class)m_instance).getFields();
			for ( int i=0; i