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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 * Development and Distribution License("CDDL") (collectively, the
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package org.netbeans;

/** Exception indicating that a module with a given code name base
 * is already being managed, and that it is not permitted to add
 * another with the same name.
 * @author Jesse Glick
 */
public final class DuplicateException extends Exception {

    private transient Module old, nue;

    DuplicateException(Module old, Module nue) {
        // XXX if nue.jarFile == old.jarFile, produce special message
        super(getInfo(nue) + " is a duplicate of " + getInfo(old)); // NOI18N
        this.old = old;
        this.nue = nue;
    }
    private static String getInfo(Module m) {
        if (m.getHistory() != null) {
            return m.getHistory().toString();
        } else if (m.getJarFile() != null) {
            return m.getJarFile().getAbsolutePath();
        } else {
            return m.getCodeNameBase();
        }
    }
    
    /** Get the module which is already known to exist.
     */
    public Module getOldModule() {
        return old;
    }
    
    /** Get the module whose creation was attempted.
     * <strong>Warning:</strong> this module will be invalid,
     * so do not attempt to do anything with it beyond asking
     * it for its version and things like that.
     */
    public Module getNewModule() {
        return nue;
    }
    
}