/*
 * 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.IOException;
import java.io.Serializable;

import edu.umd.cs.findbugs.xml.XMLAttributeList;
import edu.umd.cs.findbugs.xml.XMLOutput;
import edu.umd.cs.findbugs.xml.XMLWriteable;

/**
 * Name/value metadata pair that may be attached to a BugInstance. These are
 * different from BugAnnotations because they are not meant to be shown directly
 * to the user.
 * 
 * @author David Hovemeyer
 */
public class BugProperty implements XMLWriteable, Serializable, Cloneable {
    private static final long serialVersionUID = 1L;

    // Constants defining some standard bug properties

    /**
     * Boolean property defining whether or not the BugInstance is really a bug.
     */
    public static final String IS_BUG = "isBug";

    /**
     * Integer property defining the warning severity (1=least severe, 5=most
     * severe).
     */
    public static final String SEVERITY = "severity";

    // Fields
    private String name;

    private String value;

    private BugProperty next;

    /**
     * Constructor.
     * 
     * @param name
     *            name of property
     * @param value
     *            value of property
     */
    BugProperty(String name, String value) {
        this.name = name.intern();
        this.value = value;
    }

    @Override
    protected Object clone() {
        try {
            return super.clone();
        } catch (CloneNotSupportedException e) {
            throw new AssertionError(e);
        }
    }

    /**
     * Get name of property.
     * 
     * @return name of property
     */
    public String getName() {
        return name;
    }

    /**
     * Get value of property.
     * 
     * @return value of property
     */
    public String getValue() {
        return value;
    }

    /**
     * Get value of property as boolean.
     * 
     * @return value of property as a boolean
     */
    public boolean getValueAsBoolean() {
        return Boolean.valueOf(getValue()).booleanValue();
    }

    /**
     * Get value of property as an integer.
     * 
     * @return value of property as integer
     * @throws NumberFormatException
     *             if the value cannot be parsed as an integer
     */
    public int getValueAsInt() {
        return Integer.parseInt(getValue());
    }

    /**
     * Set value of property.
     * 
     * @param value
     */
    public void setValue(String value) {
        this.value = value;
    }

    /**
     * Set next property in list.
     * 
     * @param next
     *            next property in list
     */
    void setNext(BugProperty next) {
        this.next = next;
    }

    /**
     * Get next property in list.
     * 
     * @return next property in list
     */
    BugProperty getNext() {
        return next;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * edu.umd.cs.findbugs.xml.XMLWriteable#writeXML(edu.umd.cs.findbugs.xml
     * .XMLOutput)
     */
    public void writeXML(XMLOutput xmlOutput) throws IOException {
        xmlOutput.openCloseTag("Property",
                new XMLAttributeList().addAttribute("name", getName()).addAttribute("value", getValue()));
    }
}
