org.jgroups.util.FlagsUUID Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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).

There is a newer version: 35.0.0.Beta1

Show newest version

package org.jgroups.util;

import java.io.*;
import java.util.function.Supplier;

/**
 * Subclass of {@link UUID} accommodating additional data such as a flag. There may be many instances
 * in memory, and as they are serialized a lot and sent across the wire, I tried to make this as compact as possible.
 * @author Bela Ban
 * @since  3.5
 */
public class FlagsUUID extends UUID {
    protected int             flags;


    public FlagsUUID() {
        super();
    }

    protected FlagsUUID(byte[] data) {
        super(data);
    }

    public FlagsUUID(long mostSigBits, long leastSigBits) {
        super(mostSigBits,leastSigBits);
    }

    public  FlagsUUID(T other) {
        super(other.mostSigBits, other.leastSigBits);
        flags=other.flags;
    }

    public Supplier create() {
        return FlagsUUID::new;
    }

    public  static FlagsUUID randomUUID() {return new FlagsUUID(generateRandomBytes());}

    public static FlagsUUID randomUUID(String name) {
        FlagsUUID retval=new FlagsUUID(generateRandomBytes());
        if(name != null)
            NameCache.add(retval, name);
        return retval;
    }

    public  T setFlag(short flag) {
        flags |= flag; return (T)this;
    }

    public  T clearFlag(short flag) {
        flags &= ~flag; return (T)this;
    }

    public boolean isFlagSet(short flag) {
        return (flags & flag) == flag;
    }


    public  T addContents(T other) {
        flags|=other.flags;
        return (T)this;
    }

    @Override
    public void writeTo(DataOutput out) throws IOException {
        super.writeTo(out);
        Bits.writeIntCompressed(flags, out);
    }

    @Override
    public void readFrom(DataInput in) throws IOException {
        super.readFrom(in);
        flags=Bits.readIntCompressed(in);
    }

    /** The number of bytes required to serialize this instance */
    @Override
    public int serializedSize()     {return super.serializedSize() + Bits.size(flags);}
    public String toString() {
        return flags == 0? super.toString() : String.format("%s (flags=%d)", super.toString(), flags);
    }



}