contacturi.java

来自「java 开发的sip软电话 源码 jain sip」· Java 代码 · 共 145 行

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 * This software consists of voluntary contributions made by many
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 * Portions of this software are based upon public domain software
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package net.java.mais.sip.simple;

/**
 *  The <contact> element contains a URL of the contact address.  It
 *  optionally has a 'priority' attribute, whose value means a relative
 *  priority of this contact address over the others.  The value of the
 *  attribute MUST be a decimal number between 0 and 1 inclusive with at
 *  most 3 digits after the decimal point.  Higher values indicate higher
 *  priority. Examples of priority values are 0, 0.021, 0.5, 1.00. If the
 *  'priority' attribute is omitted, applications MUST assign the contact
 *  address the lowest priority. If the 'priority' value is out of the
 *  range, applications just SHOULD ignore the value and process it as if
 *  the attribute was not present.
 *
 *  Applications SHOULD handle contacts with a higher priority as they
 *  have precedence over those with lower priorities. How they are
 *  actually treated is beyond this specification. Also, how to handle
 *  contacts with the same priority is up to implementations.
 *
 * @author Emil Ivov
 * @version 1.0
 */

public class ContactUri
    implements Comparable
{
    private float priority = 0;
    private String contactValue = null;

    /**
     * Sets the value of the priority attribute.
     * @param priority a three digit float value indicating contact priority
     */
    public void setPriority(float priority)
    {
        this.priority = priority;
    }

    /**
     * Sets the value of this contact.
     * @param contactValue the value to give to this contact
     */
    public void setContactValue(String contactValue)
    {
        this.contactValue = contactValue;
    }

    /**
     * Returns the value of the priority attribute.
     * @return a three digit float value indicating contact priority
     */
    public float getPriority()
    {
        return priority;
    }

    /**
     * Returns the value of this contact
     * @return the value of this contact
     */
    public String getContactValue()
    {
        return contactValue;
    }

    /**
     * Compares this object with the specified object for order.
     *
     * @param o the Object to be compared.
     * @return a negative integer, zero, or a positive integer as this object is
     *   less than, equal to, or greater than the specified object.
     */
    public int compareTo(Object o)
    {
        if(!(o instanceof ContactUri))
            return Integer.MAX_VALUE;
        return -(((int)(getPriority()*1000)) - (int)(((ContactUri)o).getPriority()*1000));
    }

    public Object clone()
    {
        ContactUri clone = new ContactUri();
        clone.setContactValue(new String(getContactValue()));
        clone.setPriority(getPriority());
        return clone;
    }
}