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/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003-2005, University of Maryland
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs;


import java.io.Serializable;

/**
 * An object providing context information about a particular BugInstance.
 * 
 * A custom bug annotation can implement a static method called 'fromXML(String qName, Attributes attributes)',
 * and ensure its ELEMENT_NAME equals to its CLASSNAME. Then, the handler
 * will find the annotation class and invoke this method to deserialize
 * annotation when the report xml is loaded.
 *
 * @author David Hovemeyer
 * @see BugInstance
 */
public interface BugAnnotation extends Comparable, XMLWriteableWithMessages, Serializable, Cloneable {
    /**
     * XML tag for a formatted text message describing the annotation.
     */
    public static final String MESSAGE_TAG = "Message";

    public Object clone();

    /**
     * Accept a BugAnnotationVisitor.
     *
     * @param visitor the visitor to accept
     */
    public void accept(BugAnnotationVisitor visitor);

    /**
     * Format the annotation as a String. The given key specifies additional
     * information about how the annotation should be formatted. If the key is
     * empty, then the "default" format will be used.
     *
     * @param key          how the annotation should be formatted
     * @param primaryClass The primary class for the bug; some bug annotation format msgs
     *                     are simplified in relation to that class.
     */
    public String format(String key, ClassAnnotation primaryClass);

    /**
     * Get a description of this bug annotation. The description is a key for
     * the FindBugsAnnotationDescriptions resource bundle.
     */
    public String getDescription();

    /**
     * Set a description of this bug annotation. The description is a key for
     * the FindBugsAnnotationDescriptions resource bundle.
     */
    public void setDescription(String description);

    /**
     * Is this annotation used to compute instance hashes or match bug instances
     * across versions
     *
     * @return true if significant
     */
    public boolean isSignificant();

    public String toString(ClassAnnotation primaryClass);
}