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/*
* $Id: LuaJavaAPI.java,v 1.5 2007-04-17 23:47:50 thiago Exp $
* Copyright (C) 2003-2007 Kepler Project.
*
* 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.keplerproject.luajava;
/**
* Class that contains functions accessed by lua.
*
* @author Thiago Ponte
*/
public final class LuaJavaAPI {
public static ThreadLocal sandbox = new ThreadLocal();
private LuaJavaAPI() {
}
/**
* Java implementation of the metamethod __index for normal objects
*
* @param luaState
* int that indicates the state used
* @param obj
* Object to be indexed
* @param methodName
* the name of the method
* @return number of returned objects
*/
public static int objectIndex(int luaState, Object obj, String methodName)
throws LuaException {
return DefaultLuaJavaAPI.objectIndex(luaState, obj, methodName);
}
/**
* Java function that implements the __index for Java arrays
*
* @param luaState
* int that indicates the state used
* @param obj
* Object to be indexed
* @param index
* index number of array. Since Lua index starts from 1, the
* number used will be (index - 1)
* @return number of returned objects
*/
public static int arrayIndex(int luaState, Object obj, int index)
throws LuaException {
return DefaultLuaJavaAPI.arrayIndex(luaState, obj, index);
}
/**
* Java function to be called when a java Class metamethod __index is
* called. This function returns 1 if there is a field with searchName and 2
* if there is a method if the searchName
*
* @param luaState
* int that represents the state to be used
* @param clazz
* class to be indexed
* @param searchName
* name of the field or method to be accessed
* @return number of returned objects
* @throws LuaException
*/
public static int classIndex(int luaState, Class clazz, String searchName)
throws LuaException {
return DefaultLuaJavaAPI.classIndex(luaState, clazz, searchName);
}
/**
* Java function to be called when a java object metamethod __newindex is
* called.
*
* @param luaState
* int that represents the state to be used
* @param object
* to be used
* @param fieldName
* name of the field to be set
* @return number of returned objects
* @throws LuaException
*/
public static int objectNewIndex(int luaState, Object obj, String fieldName)
throws LuaException {
return DefaultLuaJavaAPI.objectNewIndex(luaState, obj, fieldName);
}
/**
* Java function to be called when a java array metamethod __newindex is
* called.
*
* @param luaState
* int that represents the state to be used
* @param object
* to be used
* @param index
* index number of array. Since Lua index starts from 1, the
* number used will be (index - 1)
* @return number of returned objects
* @throws LuaException
*/
public static int arrayNewIndex(int luaState, Object obj, int index)
throws LuaException {
return DefaultLuaJavaAPI.arrayNewIndex(luaState, obj, index);
}
/**
* Pushes a new instance of a java Object of the type className
*
* @param luaState
* int that represents the state to be used
* @param className
* name of the class
* @return number of returned objects
* @throws LuaException
*/
public static int javaNewInstance(int luaState, String className)
throws LuaException {
LuaJavaSandbox box = sandbox.get();
if (box != null)
box.checkClassName(className);
return DefaultLuaJavaAPI.javaNewInstance(luaState, className);
}
/**
* javaNew returns a new instance of a given clazz
*
* @param luaState
* int that represents the state to be used
* @param clazz
* class to be instanciated
* @return number of returned objects
* @throws LuaException
*/
public static int javaNew(int luaState, Class clazz) throws LuaException {
return DefaultLuaJavaAPI.javaNew(luaState, clazz);
}
/**
* Calls the static method methodName in class
* className that receives a LuaState as first parameter.
*
* @param luaState
* int that represents the state to be used
* @param className
* name of the class that has the open library method
* @param methodName
* method to open library
* @return number of returned objects
* @throws LuaException
*/
public static int javaLoadLib(int luaState, String className,
String methodName) throws LuaException {
LuaJavaSandbox box = sandbox.get();
if (box != null)
box.checkClassMethod(className, methodName);
return DefaultLuaJavaAPI.javaLoadLib(luaState, className, methodName);
}
/**
* Checks if there is a field on the obj with the given name
*
* @param luaState
* int that represents the state to be used
* @param obj
* object to be inspected
* @param fieldName
* name of the field to be inpected
* @return number of returned objects
*/
public static int checkField(int luaState, Object obj, String fieldName)
throws LuaException {
return DefaultLuaJavaAPI.checkField(luaState, obj, fieldName);
}
/**
* Function that creates an object proxy and pushes it into the stack
*
* @param luaState
* int that represents the state to be used
* @param implem
* interfaces implemented separated by comma (,)
* @return number of returned objects
* @throws LuaException
*/
public static int createProxyObject(int luaState, String implem)
throws LuaException {
LuaJavaSandbox box = sandbox.get();
if (box != null) {
for (String className:implem.split(","))
box.checkClassName(className);
}
return DefaultLuaJavaAPI.createProxyObject(luaState, implem);
}
}