/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 1997--2008 The R Development Core Team
* Copyright (C) 2003, 2004 The R Foundation
* Copyright (C) 2010 bedatadriven
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.renjin.sexp;
import org.renjin.eval.EvalException;
import org.renjin.invoke.ClassBinding;
import org.renjin.invoke.ClassBindings;
import org.renjin.invoke.reflection.MemberBinding;
/**
* Data type that wraps an external (JVM) pointer
*/
public final class ExternalPtr<T> extends AbstractSEXP {
private final T instance;
private final ClassBinding binding;
public ExternalPtr(T instance, AttributeMap attributes) {
super(attributes);
this.instance = instance;
if(instance == null) {
this.binding = null;
} else {
if(instance instanceof Class) {
this.binding = ClassBindings.getClassDefinitionBinding((Class) instance);
} else {
this.binding = ClassBindings.getClassBinding(instance.getClass());
}
}
}
public ExternalPtr(T instance) {
this(instance, AttributeMap.EMPTY);
}
@Override
public String getTypeName() {
return "externalptr";
}
private MemberBinding getMemberBinding(Symbol name) {
if(binding == null) {
throw new EvalException("ExternalPtr is NULL for name "+name.getPrintName());
}
return binding.getMemberBinding(name);
}
public SEXP getMember(Symbol name) {
return getMemberBinding(name).getValue(instance);
}
public void setMember(Symbol name, SEXP value) {
getMemberBinding(name).setValue(instance, value);
}
public T getInstance() {
return instance;
}
@Override
public void accept(SexpVisitor visitor) {
}
@Override
protected SEXP cloneWithNewAttributes(AttributeMap attributes) {
this.attributes = attributes;
return this;
}
}