/*******************************************************************************
* 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.Field;
import org.luaj.vm2.LuaError;
import org.luaj.vm2.LuaUserdata;
import org.luaj.vm2.LuaValue;
/**
* LuaValue that represents a Java instance.
* <p>
* Will respond to get() and set() by returning field values or methods.
* <p>
* This class is not used directly.
* It is returned by calls to {@link CoerceJavaToLua#coerce(Object)}
* when a subclass of Object is supplied.
* @see CoerceJavaToLua
* @see CoerceLuaToJava
*/
class JavaInstance extends LuaUserdata {
JavaClass jclass;
JavaInstance(Object instance) {
super(instance);
}
public LuaValue get(LuaValue key) {
if ( jclass == null )
jclass = JavaClass.forClass(m_instance.getClass());
Field f = jclass.getField(key);
if ( f != null )
try {
return CoerceJavaToLua.coerce(f.get(m_instance));
} catch (Exception e) {
throw new LuaError(e);
}
LuaValue m = jclass.getMethod(key);
if ( m != null )
return m;
return super.get(key);
}
public void set(LuaValue key, LuaValue value) {
if ( jclass == null )
jclass = JavaClass.forClass(m_instance.getClass());
Field f = jclass.getField(key);
if ( f != null )
try {
f.set(m_instance, CoerceLuaToJava.coerce(value, f.getType()));
return;
} catch (Exception e) {
throw new LuaError(e);
}
super.set(key, value);
}
}