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// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
package org.xbill.DNS;
/**
* Constants and functions relating to DNS message sections
*
* @author Brian Wellington
*/
public final class Section {
/** The question (first) section */
public static final int QUESTION = 0;
/** The answer (second) section */
public static final int ANSWER = 1;
/** The authority (third) section */
public static final int AUTHORITY = 2;
/** The additional (fourth) section */
public static final int ADDITIONAL = 3;
/* Aliases for dynamic update */
/** The zone (first) section of a dynamic update message */
public static final int ZONE = 0;
/** The prerequisite (second) section of a dynamic update message */
public static final int PREREQ = 1;
/** The update (third) section of a dynamic update message */
public static final int UPDATE = 2;
private static Mnemonic sections = new Mnemonic("Message Section",
Mnemonic.CASE_LOWER);
private static String [] longSections = new String[4];
private static String [] updateSections = new String[4];
static {
sections.setMaximum(3);
sections.setNumericAllowed(true);
sections.add(QUESTION, "qd");
sections.add(ANSWER, "an");
sections.add(AUTHORITY, "au");
sections.add(ADDITIONAL, "ad");
longSections[QUESTION] = "QUESTIONS";
longSections[ANSWER] = "ANSWERS";
longSections[AUTHORITY] = "AUTHORITY RECORDS";
longSections[ADDITIONAL] = "ADDITIONAL RECORDS";
updateSections[ZONE] = "ZONE";
updateSections[PREREQ] = "PREREQUISITES";
updateSections[UPDATE] = "UPDATE RECORDS";
updateSections[ADDITIONAL] = "ADDITIONAL RECORDS";
}
private
Section() {}
/** Converts a numeric Section into an abbreviation String */
public static String
string(int i) {
return sections.getText(i);
}
/** Converts a numeric Section into a full description String */
public static String
longString(int i) {
sections.check(i);
return longSections[i];
}
/**
* Converts a numeric Section into a full description String for an update
* Message.
*/
public static String
updString(int i) {
sections.check(i);
return updateSections[i];
}
/** Converts a String representation of a Section into its numeric value */
public static int
value(String s) {
return sections.getValue(s);
}
}
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