WeakReferenceSerializer.java

package com.jarvis.cache.serializer;

import java.io.IOException;
import java.lang.ref.WeakReference;

import com.caucho.hessian.io.AbstractHessianOutput;
import com.caucho.hessian.io.AbstractSerializer;
import com.caucho.hessian.io.ObjectSerializer;
import com.caucho.hessian.io.Serializer;

public class WeakReferenceSerializer extends AbstractSerializer implements ObjectSerializer {

    @Override
    public Serializer getObjectSerializer() {
        return this;
    }

    @Override
    public void writeObject(Object obj, AbstractHessianOutput out) throws IOException {
        if(out.addRef(obj)) {
            return;
        }
        @SuppressWarnings("unchecked")
        WeakReference<Object> data=(WeakReference<Object>)obj;

        int refV=out.writeObjectBegin(WeakReference.class.getName());

        if(refV == -1) {
            out.writeInt(1);
            out.writeString("ref");
            out.writeObjectBegin(WeakReference.class.getName());
        }
        if(data != null) {
            Object ref=data.get();
            if(null != ref) {
                out.writeObject(ref);
            } else {
                out.writeNull();
            }
        } else {
            out.writeNull();
        }
    }
}