com.crankuptheamps.client.fields.ReasonField Maven / Gradle / Ivy

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//
// Copyright (c) 2010-2021 60East Technologies Inc., All Rights Reserved.
//
// This computer software is owned by 60East Technologies Inc. and is
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// treaties.  This computer software is furnished by 60East Technologies
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package com.crankuptheamps.client.fields;

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import com.crankuptheamps.client.Message;
import com.crankuptheamps.client.Message.Reason;

/**
 * Field data for a {@link Message} consisting of a reason.
 * This reason helps to provide more information about acknowledgements.  
 */

public class ReasonField extends Field
{
    /// NOTE THESE MUST MATCH the order in the Message.Reasons enum.
    private static String[] reasonStrings = {
         "",
         "duplicate",
         "bad filter",
         "bad regex topic",
         "subscription already exists",
         "deleted",
         "expired",
         "match",
         "invalid topic",
         "name in use",
         "auth failure",
         "not entitled",
         "authentication disabled",
         "invalid bookmark",
         "invalid orderby",
         "subid in use",
         "no topic",
         "logon failed",
         "logon required",
         "invalid topic or filter",
         "invalid subId",
         "no topic or filter",
         "no client name",
         "bad filter",
         "bad sow key",
         "bad regex topic",
         "regex topic not supported",
         "sow store failed",
         "parse error",
         "not supported",
         "tx store failure",
         "duplicate logon attempt",
         "tx replay failed",
         "sow canceled",
         "invalid options",
         "invalid message type",
         "orderby too large",
         "rejected by transport filter",
         "sow_delete command only supports one of: filter, sow_keys, bookmark, or data",
         "publish filter no match"
    };

    /**
     * This returns the value of this reason field as an integer reason code. 
     * @return The value of this reason field as an integer reason code. 
     * @see com.crankuptheamps.client.Message.Reason
     */
    public int getValue()
    {
        if(this.buffer != null)
        {
            return decodeReason(this.buffer, this.position, this.length);
        }
        return Reason.None;
    }
    
    /**
     * Returns the value of this reason field as a descriptive text string.
     * @return The reason string.
     */
    public String getText()
    {
        if(this.buffer != null)
        {
            return new String(this.buffer, this.position, this.length, StandardCharsets.ISO_8859_1);
        }
        return "";
    }
    private void set(String value)
    {
        set(value.getBytes(StandardCharsets.ISO_8859_1));
    }

    /**
     * Sets the value of this reason field using the specified reason code integer.
     * @param v The reason code integer.
     * @see com.crankuptheamps.client.Message.Reason
     */
    public void setValue(int v)
    {
        if(v == 0 || v> reasonStrings.length-1)
        {
            reset();
            return;
        }
        set(reasonStrings[v]);
    }

    static final int decodeReason(byte[] buffer, int pos, int len)
    {
        String reasonBytes = new String(buffer, pos, len, StandardCharsets.ISO_8859_1);
        for(int i = 0; i < reasonStrings.length; ++i)
        {
            if(reasonStrings[i].equals(reasonBytes)) return i;
        }
        
        return Message.Reason.Other;
        
    }

    /**
     * Utility method that takes a reason code integer and returns the associated descriptive text.
     * Returns "unknown" if the integer code is not known.
     * @param r The reason code integer to be encoded.
     * @return The descriptive text reason.
     */
    static final public String encodeReason(int r)
    {
        if(r > reasonStrings.length-1) return "unknown";
        return reasonStrings[r];
    }

}