jnr.ffi.provider.jffi.StructByReferenceResultConverterFactory Maven / Gradle / Ivy
/*
* Copyright (C) 2013 Wayne Meissner
*
* This file is part of the JNR project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jnr.ffi.provider.jffi;
import jnr.ffi.*;
import jnr.ffi.mapper.FromNativeContext;
import jnr.ffi.mapper.FromNativeConverter;
import jnr.ffi.provider.converters.StructByReferenceFromNativeConverter;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
final class StructByReferenceResultConverterFactory {
private final Map, FromNativeConverter> converters
= new ConcurrentHashMap, FromNativeConverter>();
private final AsmClassLoader classLoader;
private final boolean asmEnabled;
public StructByReferenceResultConverterFactory(AsmClassLoader classLoader, boolean asmEnabled) {
this.classLoader = classLoader;
this.asmEnabled = asmEnabled;
}
public final FromNativeConverter get(Class structClass,
FromNativeContext fromNativeContext) {
FromNativeConverter converter = converters.get(structClass);
if (converter == null) {
synchronized (converters) {
if ((converter = converters.get(structClass)) == null) {
converters.put(structClass, converter = createConverter(fromNativeContext.getRuntime(), structClass, fromNativeContext));
}
}
}
return converter;
}
private FromNativeConverter createConverter(jnr.ffi.Runtime runtime,
Class structClass,
FromNativeContext fromNativeContext) {
return asmEnabled
? AsmStructByReferenceFromNativeConverter.newStructByReferenceConverter(runtime, structClass, 0, classLoader)
: StructByReferenceFromNativeConverter.getInstance(structClass, fromNativeContext);
}
}