xpertss.sdp.Attribute Maven / Gradle / Ivy
/*
* Attribute.java
*
* Created on December 18, 2001, 10:55 AM
*/
package xpertss.sdp;
import xpertss.lang.Objects;
import xpertss.lang.Strings;
/**
* An Attribute represents an a= fields contained within either a MediaDescription or
* a SessionDescription.
*
* An Attribute can be just an identity/name or a name-value pair.
*
* Here are some examples:
*
* a=recvonly
* identifies a rcvonly attribute with just a name
* a=rtpmap:0 PCMU/8000
* identifies the media format 0 has having the value PCMU/8000.
*
*
* @version 1.0
*/
public final class Attribute extends Field {
private String name;
private String value;
Attribute(String name, String value)
{
this.name = Strings.notEmpty(name, "name may not be empty");
this.value = Strings.nullIfEmpty(Strings.trim(value));
}
/**
* Returns the name of this attribute
*
* @return a String identity.
*/
public String getName()
{
return name;
}
/**
* Returns the value of this attribute.
*
* @return the value; null if the attribute has no associated value.
*/
public String getValue()
{
return value;
}
@Override
public char getTypeChar()
{
return 'a';
}
@Override
public Attribute clone() {
try {
return (Attribute) super.clone();
} catch(CloneNotSupportedException e) {
throw new Error(e);
}
}
@Override
public int hashCode()
{
return Objects.hash(name, value);
}
@Override
public boolean equals(Object o)
{
if(o instanceof Attribute) {
Attribute attr = (Attribute) o;
return Objects.equal(attr.getName(), name) && Objects.equal(attr.getValue(), value);
}
return false;
}
@Override
public String toString()
{
StringBuilder buf = new StringBuilder();
buf.append(getTypeChar()).append("=").append(name);
if(!Strings.isEmpty(value)) buf.append(":").append(value);
return buf.toString();
}
}