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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups.util;

import org.jgroups.Global;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Objects;

/**
 * Wraps an object and its serialized form.
 * @author Bela Ban
 * @since  5.0.0
 */
public class ObjectWrapper implements SizeStreamable {
    protected Object    obj;
    protected ByteArray serialized; // serialized version of obj (cached)

    public ObjectWrapper() {
        // only used for deserialization
    }

    public ObjectWrapper(Object obj) {
        this.obj=Objects.requireNonNull(obj);
    }

    public  T getObject() {
        return (T)obj;
    }

    public synchronized ObjectWrapper setObject(Object obj) {
        this.obj=obj;
        this.serialized=null;
        return this;
    }

    public synchronized ByteArray getSerialized() {
        if(serialized != null)
            return serialized;
        try {
            return serialized=Util.objectToBuffer(obj);
        }
        catch(Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    public int getLength() {
        return getSerialized().getLength();
    }

    public String toString() {
        return String.format("obj: %s %s", obj, serialized != null? "(" + serialized.getLength() + " bytes)" : "");
    }

    public int serializedSize() {
        int retval=Global.INT_SIZE; // length (integer)
        if(obj == null)
            return retval;
        return retval + getLength();
    }

    public void writeTo(DataOutput out) throws IOException {
        if(obj != null) {
            ByteArray arr=getSerialized();
            out.writeInt(arr.getLength());
            out.write(arr.getArray(), 0, arr.getLength());
        }
        else
            out.writeInt(-1);
    }

    public void readFrom(DataInput in) throws IOException, ClassNotFoundException {
        int len=in.readInt();
        if(len == -1)
            return;
        byte[] tmp=new byte[len];
        in.readFully(tmp, 0, len);
        serialized=new ByteArray(tmp);
        obj=Util.objectFromBuffer(serialized, null);
        // serialized=null;
    }


}