org.jgroups.util.FlagsUUID Maven / Gradle / Ivy
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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).
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 extends UUID> 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);
}
}