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/*
 * @(#)DestType.java	1.15 06/29/07
 */ 

package com.sun.messaging.jmq.util;


/**
 * DestType defines the bitmaps for setting destination types. Strictly
 * speaking a destination has three attributes:
 * <pre>
 *      1. Its type (Queue or Topic)
 *      2. Its lifespan (temporary or not)
 *      3. Its flavor (single, round robin, failover, etc)
 * </pre>
 * In practice all combinations are not used (for example you don't have
 * round-robin topics), but by using bitmaps we have that flexibility.
 * <P>
 * This class defines the bitmaps to specify these three components of
 * a destination type.
 * <P>
 * A couple examples of specifying a destination type are:
 * <pre>
 *      // A round robin queue
 *      int type = DEST_TYPE_QUEUE | DEST_FLAVOR_RROBIN;
 *
 *      // A temporary topic
 *      int type = DEST_TYPE_TOPIC | DEST_TMP;
 * </pre>
 */
public class DestType {

    public static final int DEST_TYPE_QUEUE         = 0x00000001;
    public static final int DEST_TYPE_TOPIC         = 0x00000002;

    public static final int DEST_TEMP               = 0x00000010;
    public static final int DEST_AUTO               = 0x00000020;
    public static final int DEST_INTERNAL           = 0x00000040;
    public static final int DEST_ADMIN              = 0x00000080;
    public static final int DEST_DMQ                = 0x00001000;

    /**
     * @since 3.7
     */
    public static final int DEST_LOCAL              = 0x00002000;

    /**
     * @deprecated since 3.5
     */
    public static final int DEST_FLAVOR_SINGLE      = 0x00000100;

    /**
     * @deprecated since 3.5
     */
    public static final int DEST_FLAVOR_RROBIN      = 0x00000200;

    /**
     * @deprecated since 3.5
     */
    public static final int DEST_FLAVOR_FAILOVER    = 0x00000400;

    /**
     * Internal destination name prefix
     * @since 3.5
     */
    public static final String INTERNAL_DEST_PREFIX = "mq.";

    public static final String QUEUESTR = "queue";  //used by acl
    public static final String TOPICSTR = "topic";

    /**
     * access control method 
     */
    public static String queueOrTopic(int type) {
        // only access control for non-temp QUEUES and TOPICS
        if ( (type & DEST_TEMP) > 0)
            return null;
        if ((type & DEST_TYPE_QUEUE) > 0)
            return toString(DEST_TYPE_QUEUE);
        if ((type & DEST_TYPE_TOPIC) > 0)
            return toString(DEST_TYPE_TOPIC);
        return null;
    }

    public static boolean isQueue(int mask) {
        return (mask & DEST_TYPE_QUEUE) == DEST_TYPE_QUEUE;
    }

    public static boolean isTopic(int mask) {
        return (mask & DEST_TYPE_TOPIC) == DEST_TYPE_TOPIC;
    }

    public static boolean isTemporary(int mask) {
        return (mask & DEST_TEMP) == DEST_TEMP;
    }


    /**
     * @since 4.0
     */
    public static boolean isLocal(int mask) {
        return (mask & DEST_LOCAL) == DEST_LOCAL;
    }

    /**
     * @since 3.5
     */
    public static boolean isAutoCreated(int mask) {
        return (mask & DEST_AUTO) == DEST_AUTO;
    }

    /**
     * @since 3.5
     */
    public static boolean isAdmin(int mask) {
        return (mask & DEST_ADMIN) == DEST_ADMIN;
    }


    /**
     * @since 3.5
     */
    public static boolean isInternal(int mask) {
        return (mask & DEST_INTERNAL) == DEST_INTERNAL;
    }

    /**
     * @since 3.6
     */
    public static boolean isDMQ(int mask) {
        return (mask & DEST_DMQ) == DEST_DMQ;
    }

    /**
     * @since 3.5
     */
    public static boolean destNameIsInternal(String destName) {
	if ((destName != null) &&
	    destName.startsWith(INTERNAL_DEST_PREFIX))  {
	    return (true);
	}

	return (false);
    }

    /**
     * @since 3.5
     */
    public static boolean destNameIsInternalLogging(String destName) {
	if ((destName != null) &&
	    destName.startsWith(INTERNAL_DEST_PREFIX + "log.broker"))  {
	    return (true);
	}

	return (false);
    }

    /**
     * @deprecated since 3.5
     */
    public static boolean isSingle(int mask) {
        return (mask & DEST_FLAVOR_SINGLE) == DEST_FLAVOR_SINGLE;
    }

    /**
     * @deprecated since 3.5
     */
    public static boolean isRRobin(int mask) {
        return (mask & DEST_FLAVOR_RROBIN) == DEST_FLAVOR_RROBIN;
    }

    /**
     * @deprecated since 3.5
     */
    public static boolean isFailover(int mask) {
        return (mask & DEST_FLAVOR_FAILOVER) == DEST_FLAVOR_FAILOVER;
    }

    public static String toString(int mask) {
        StringBuffer s = new StringBuffer();

        if (isQueue(mask)) {
            s.append(QUEUESTR);
        } else if (isTopic(mask)) {
            s.append(TOPICSTR);
        } else {
            s.append("?????");
        }

        if (isTemporary(mask)) {
            s.append(":temporary");
        } 
        if (isAutoCreated(mask)) {
            s.append(":autocreated");
        } 
        if (isInternal(mask)) {
            s.append(":internal");
        }
        if (isAdmin(mask)) {
            s.append(":admin");
        } 
        if (isLocal(mask)) {
            s.append(":local");
        } 

        if (isSingle(mask)) {
            s.append(":single");
        } else if (isRRobin(mask)) {
            s.append(":roundrobin");
        } else if (isFailover(mask)) {
            s.append(":failover");
        }

        return s.toString();
    }
}
