/*
* Copyright 2007, 2008, 2009 Duncan McGregor
*
* This file is part of Rococoa, a library to allow Java to talk to Cocoa.
*
* Rococoa is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rococoa is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Rococoa. If not, see <http://www.gnu.org/licenses/>.
*/
package org.rococoa.internal;
import org.rococoa.cocoa.foundation.NSInvocation;
import com.sun.jna.Memory;
/**
* Maps to and from bytes in an NSInvocation to Java types.
*
* @author duncan
*
*/
public abstract class NSInvocationMapper {
protected final Class<?> type;
protected final String typeString;
protected NSInvocationMapper(String typeString, Class<?> type) {
this.type = type;
this.typeString = typeString;
}
public String typeString() {
return typeString;
}
public Object readArgumentFrom(NSInvocation invocation, int index, Class<?> type) {
Memory buffer = new Memory(8); // big enough for long or double
invocation.getArgument_atIndex(buffer, index);
return readFrom(buffer, type);
}
protected Object readFrom(Memory buffer, Class<?> type) {
throw new Error("Should be overriden or bypassed");
}
public abstract Memory bufferForResult(Object methodCallResult);
}