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visualweb.api.designer » com » sun » rave » web » ui » component » Alarm.java
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package com.sun.rave.web.ui.component;

import java.util.Comparator;

/**
 * <p>Defines a component for displaying an alarm icon based on the
 * alarm seveirty.</p>
 */
public class Alarm extends AlarmBase implements Comparator {

    /** Severity of an alarm. */
    public static final String SEVERITY_DOWN     = "down";
    public static final String SEVERITY_CRITICAL = "critical";
    public static final String SEVERITY_MAJOR    = "major";
    public static final String SEVERITY_MINOR    = "minor";
    public static final String SEVERITY_OK       = "ok";

    public static final String DEFAULT_SEVERITY = SEVERITY_OK;

    // Severity level of an alarm.
    private final int SEVERITY_LEVEL_DOWN     = 1;
    private final int SEVERITY_LEVEL_CRITICAL = 2;
    private final int SEVERITY_LEVEL_MAJOR    = 3;
    private final int SEVERITY_LEVEL_MINOR    = 4;
    private final int SEVERITY_LEVEL_OK       = 5;

    /** Default constructor. */
    public Alarm() {
    }

    /** Create an instance with the given severity. */
    public Alarm(String severity) {
        setSeverity(severity);
    }

    /**
     * Compare the given objects for severity order.
     */
    public int compare(Object o1, Object o2) throws ClassCastException {
        int s1 = getSeverityLevel((Alarm) o1);
        int s2 = getSeverityLevel((Alarm) o2);
        return (s1 > s2) ? -1 : s1 == s2 ? 0 : 1;
    }

    /**
     * Indicates whether some other object is "equal to" this Comparator.
     */
    public boolean equals(Object o) throws ClassCastException {
        int s1 = getSeverityLevel(this);
        int s2 = getSeverityLevel((Alarm) o);
        return (s1 == s2);
    }

    /**
     * Helper method to get the severity level of an alarm.
     */
    private int getSeverityLevel(Alarm alarm) {
        int severity = SEVERITY_LEVEL_OK;
        if (alarm.getSeverity().equals(SEVERITY_DOWN)) {
            severity = SEVERITY_LEVEL_DOWN;
        } else if (alarm.getSeverity().equals(SEVERITY_CRITICAL)) {
            severity = SEVERITY_LEVEL_CRITICAL;
        } else if (alarm.getSeverity().equals(SEVERITY_MAJOR)) {
            severity = SEVERITY_LEVEL_MAJOR;
        } else if (alarm.getSeverity().equals(SEVERITY_MINOR)) {
            severity = SEVERITY_LEVEL_MINOR;          
        }
        return severity;
    }
}
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