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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.InvocationTargetException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.luaj.vm2.LuaError;
import org.luaj.vm2.LuaValue;
import org.luaj.vm2.Varargs;
import org.luaj.vm2.lib.VarArgFunction;
/**
* LuaValue that represents a particular public Java constructor.
*
* May be called with arguments to return a JavaInstance
* created by calling the constructor.
*
* This class is not used directly.
* It is returned by calls to {@link JavaClass#new(LuaValue key)}
* when the value of key is "new".
* @see CoerceJavaToLua
* @see CoerceLuaToJava
*/
class JavaConstructor extends JavaMember {
static final Map constructors = Collections.synchronizedMap(new HashMap());
static JavaConstructor forConstructor(Constructor c) {
JavaConstructor j = (JavaConstructor) constructors.get(c);
if ( j == null )
constructors.put( c, j = new JavaConstructor(c) );
return j;
}
public static LuaValue forConstructors(JavaConstructor[] array) {
return new Overload(array);
}
final Constructor constructor;
private JavaConstructor(Constructor c) {
super( c.getParameterTypes(), c.getModifiers() );
this.constructor = c;
}
public Varargs invoke(Varargs args) {
Object[] a = convertArgs(args);
try {
return CoerceJavaToLua.coerce( constructor.newInstance(a) );
} catch (InvocationTargetException e) {
throw new LuaError(e.getTargetException());
} catch (Exception e) {
return LuaValue.error("coercion error "+e);
}
}
/**
* LuaValue that represents an overloaded Java constructor.
*
* On invocation, will pick the best method from the list, and invoke it.
*
* This class is not used directly.
* It is returned by calls to calls to {@link JavaClass#get(LuaValue key)}
* when key is "new" and there is more than one public constructor.
*/
static class Overload extends VarArgFunction {
final JavaConstructor[] constructors;
public Overload(JavaConstructor[] c) {
this.constructors = c;
}
public Varargs invoke(Varargs args) {
JavaConstructor best = null;
int score = CoerceLuaToJava.SCORE_UNCOERCIBLE;
for ( int i=0; i