XID.java

package connector;

import javax.transaction.xa.Xid;

/**
 * The XID class provides an implementation of the X/Open
 * transaction identifier it implements the javax.transaction.xa.Xid interface.
 */
public class XID implements Xid {

    private static int ID = 1000;

    public int formatID;   // Format identifier
                           // (-1) means that the XID is null
    public int branchQualifier;
    public int globalTxID;

    static public  final int MAXGTRIDSIZE= 64; 
    static public  final int MAXBQUALSIZE= 64; 

    public XID() {
        int foo = ID++;
        formatID = foo;
        branchQualifier = foo;
        globalTxID = foo;
    }

    public boolean equals(Object o) {
        XID               other;   // The "other" XID
        int               L;       // Combined gtrid_length + bqual_length
        int               i;

        if (!(o instanceof XID))        // If the other XID isn't an XID
        {
            return false;                  // It can't be equal
        }
        
        other = (XID)o;                   // The other XID, now properly cast
        
        if (this.formatID == other.formatID 
                && this.branchQualifier == other.branchQualifier
                && this.globalTxID == other.globalTxID) {
            return true;
        }

        return false;
    }

    /**
     * Compute the hash code.
     *
     * @return the computed hashcode
     */
    public int hashCode() {
        if (formatID == (-1)) {
            return (-1);
        }

        return formatID + branchQualifier + globalTxID;

    }

    /*
     * Convert to String
     *
     * <p> This is normally used to display the XID when debugging.
     */

    /**
     * Return a string representing this XID.
     *
     * @return the string representation of this XID
     */
    public String toString() {

        String s = new String("{XID: " +
                "formatID("     + formatID     + "), " +
                "branchQualifier (" + branchQualifier + "), " +
                "globalTxID(" + globalTxID + ")}");
        
        return s;
    }

    /*
     * Return branch qualifier
     */

    /**
     * Returns the branch qualifier for this XID.
     *
     * @return the branch qualifier
     */
    public byte[] getBranchQualifier() {
        String foo = (new Integer(branchQualifier)).toString();
        return foo.getBytes();
    }

    public int getFormatId() {
        return formatID;
    }

    public byte[] getGlobalTransactionId() {
        String foo = (new Integer(globalTxID)).toString();
        return foo.getBytes();
    }
}