/*
* 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.test.node;
import java.util.ArrayList;
import java.util.List;
import org.keplerproject.luajava.LuaException;
import org.keplerproject.luajava.LuaObject;
import org.keplerproject.luajava.LuaState;
import org.keplerproject.luajava.LuaStateFactory;
/**
* Example that ilustrate the usage of Lua as a configuration file.
*
* @author thiago
*/
public class LuaNode
{
private static LuaState L;
private static IConfig configLib;
private LuaObject configFile;
private static final String configFileName = "testConfig.lua";
/**
* Parses the Lua file to be used.
*
* @param fileName The Lua file
*/
public static LuaNode proccessFile(String fileName) throws LuaException
{
try
{
return new LuaNode(fileName);
}
catch (ClassNotFoundException e)
{
throw new LuaException(e);
}
}
protected LuaNode(String fileName) throws ClassNotFoundException, LuaException
{
if (L == null)
{
L = LuaStateFactory.newLuaState();
L.openLibs();
int err = L.LdoFile(configFileName);
if (err != 0)
{
switch (err)
{
case 1 :
throw new LuaException("Runtime error. " + L.toString(-1));
case 2 :
throw new LuaException("File not found. " + L.toString(-1));
case 3 :
throw new LuaException("Syntax error. " + L.toString(-1));
case 4 :
throw new LuaException("Memory error. " + L.toString(-1));
default :
throw new LuaException("Error. " + L.toString(-1));
}
}
configLib = (IConfig) L.getLuaObject("configLib").createProxy("test.node.IConfig");
}
configFile = configLib.processConfigFile(fileName);
}
protected LuaNode(LuaObject obj)
{
configFile = obj;
}
/**
* Name of the node represented by <code>this</code>.
*/
public String getName()
{
return configLib.getName(configFile);
}
/**
* Returns a LuaNode representing the child of the current node
* with the name <code>childName</code>
*/
public LuaNode getChild(String childName)
{
return new LuaNode(configLib.getChild(configFile, childName));
}
/**
* Returns a list with all the node children of the current node.
*/
public List getChildren()
{
LuaObject obj = configLib.getChildren(configFile);
List list = new ArrayList();
int i = 1;
obj.push();
L.pushNumber(i);
L.getTable(-2);
while(!L.isNil(-1))
{
if(L.isTable(-1))
{
list.add(new LuaNode(L.getLuaObject(-1)));
}
L.pop(1);
i++;
L.pushNumber(i);
L.getTable(-2);
}
L.pop(1);
return list;
}
/**
* Returns a list with all the children of the current node with the name
* <code>childName</code>.
*/
public List getChildren(String childName)
{
LuaObject obj = configLib.getChildren(configFile, childName);
List list = new ArrayList();
int i = 1;
obj.push();
L.pushNumber(i);
L.getTable(-2);
while(!L.isNil(-1))
{
if(L.isTable(-1))
{
list.add(new LuaNode(L.getLuaObject(-1)));
}
L.pop(1);
i++;
L.pushNumber(i);
L.getTable(-2);
}
L.pop(1);
return list;
}
/**
* Returns the attribute with name <code>attributeName</code>.
*/
public String getAttribute(String attributeName)
{
return configLib.getAttribute(configFile, attributeName);
}
/**
* Returns the value of the current node.
*/
public String getValue()
{
return configLib.getValue(configFile);
}
}