com.naef.jnlua

Class DefaultConverter

java.lang.Object

com.naef.jnlua.DefaultConverter

All Implemented Interfaces:

Converter

public class DefaultConverter
extends Object
implements Converter

Default implementation of the Converter interface.

Method Summary

Methods

Modifier and Type	Method and Description
void	convertJavaObject(LuaState luaState, Object object) Converts a Java object to a Lua value and pushes that value on the stack.
<T> T	convertLuaValue(LuaState luaState, int index, Class<T> formalType) Converts a Lua value to a Java object of the specified formal type.
static DefaultConverter	getInstance() Returns the instance of this class.
int	getTypeDistance(LuaState luaState, int index, Class<?> formalType) Returns the type distance between a Lua value and a formal Java type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static DefaultConverter getInstance()

Returns the instance of this class.

Returns:

the instance

getTypeDistance

public int getTypeDistance(LuaState luaState,
                  int index,
                  Class<?> formalType)

Description copied from interface: Converter

Returns the type distance between a Lua value and a formal Java type. Distances are comparable for the same Lua value only. If a Lua value cannot be converted to the specified formal type, the method returns Integer.MAX_VALUE.

Specified by:

getTypeDistance in interface Converter

Parameters:

luaState - the Lua state

index - the stack index containing the value

formalType - the formal Java type

Returns:

the type distance, or Integer.MAX_VALUE if the conversion is not supported

convertLuaValue

public <T> T convertLuaValue(LuaState luaState,
                    int index,
                    Class<T> formalType)

Description copied from interface: Converter

Converts a Lua value to a Java object of the specified formal type.

If the Lua value is nil, the method returns null.

Specified by:

convertLuaValue in interface Converter

Parameters:

luaState - the Lua state

index - the stack index containing the value

formalType - the formal Java type

Returns:

the Java object, or null

convertJavaObject

public void convertJavaObject(LuaState luaState,
                     Object object)

Description copied from interface: Converter

Converts a Java object to a Lua value and pushes that value on the stack.

If the object is null, the method pushes nil.

Specified by:

convertJavaObject in interface Converter

Parameters:

luaState - the Lua state

object - the Java object, or null