gov.nist.javax.sdp.fields.AttributeField Maven / Gradle / Ivy
/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
/*******************************************************************************
* Product of NIST/ITL Advanced Networking Technologies Division (ANTD). *
*******************************************************************************/
package android.gov.nist.javax.sdp.fields;
import android.gov.nist.core.*;
import android.javax.sdp.*;
/**
* Attribute Field.
*
*@version JSR141-PUBLIC-REVIEW (subject to change).
*
*@author Olivier Deruelle
*@author M. Ranganathan
*
*
*
*/
public class AttributeField extends SDPField implements android.javax.sdp.Attribute {
protected NameValue attribute;
public NameValue getAttribute() {
return attribute;
}
public AttributeField() {
super(ATTRIBUTE_FIELD);
}
/**
* Set the attribute member
*/
public void setAttribute(NameValue a) {
attribute = a;
attribute.setSeparator(Separators.COLON);
}
/**
* Get the string encoded version of this object
* @since v1.0
*/
public String encode() {
String encoded_string = ATTRIBUTE_FIELD;
if (attribute != null)
encoded_string += attribute.encode();
return encoded_string + Separators.NEWLINE;
}
public String toString() {
return this.encode();
}
/** Returns the name of this attribute
* @throws SdpParseException if the name is not well formatted.
* @return a String identity or null.
*/
public String getName() throws SdpParseException {
NameValue nameValue = getAttribute();
if (nameValue == null)
return null;
else {
String name = nameValue.getName();
if (name == null)
return null;
else
return name;
}
}
/** Sets the id of this attribute.
* @param name the string name/id of the attribute.
* @throws SdpException if the name is null
*/
public void setName(String name) throws SdpException {
if (name == null)
throw new SdpException("The name is null");
else {
NameValue nameValue = getAttribute();
if (nameValue == null)
nameValue = new NameValue();
nameValue.setName(name);
setAttribute(nameValue);
}
}
/** Determines if this attribute has an associated value.
* @throws SdpParseException if the value is not well formatted.
* @return true if the attribute has a value.
*/
public boolean hasValue() throws SdpParseException {
NameValue nameValue = getAttribute();
if (nameValue == null)
return false;
else {
Object value = nameValue.getValueAsObject();
if (value == null)
return false;
else
return true;
}
}
/** Returns the value of this attribute.
* @throws SdpParseException if the value is not well formatted.
* @return the value; null if the attribute has no associated value.
*/
public String getValue() throws SdpParseException {
NameValue nameValue = getAttribute();
if (nameValue == null)
return null;
else {
Object value = nameValue.getValueAsObject();
if (value == null)
return null;
else if (value instanceof String)
return (String) value;
else
return value.toString();
}
}
/** Sets the value of this attribute.
* @param value the - attribute value
* @throws SdpException if the value is null.
*/
public void setValue(String value) throws SdpException {
if (value == null)
throw new SdpException("The value is null");
else {
NameValue nameValue = getAttribute();
if (nameValue == null)
nameValue = new NameValue();
nameValue.setValueAsObject(value);
setAttribute(nameValue);
}
}
/**
* Allow for null value when setting the value.
*
* @param value -- can be null.
*/
public void setValueAllowNull(String value) {
NameValue nameValue = getAttribute();
if (nameValue == null)
nameValue = new NameValue();
nameValue.setValueAsObject(value);
setAttribute(nameValue);
}
public Object clone() {
AttributeField retval = (AttributeField) super.clone();
if (this.attribute != null)
retval.attribute = (NameValue) this.attribute.clone();
return retval;
}
public boolean equals(Object that ) {
if ( ! (that instanceof AttributeField)) return false;
AttributeField other = (AttributeField) that;
boolean equalNames = other.getAttribute().getName().equalsIgnoreCase(this.getAttribute().getName());
boolean equalValues;
if(this.getAttribute().getValueAsObject() != null) {
equalValues = this.getAttribute().getValueAsObject().equals(other.getAttribute().getValueAsObject());
} else {
equalValues = (other.getAttribute().getValueAsObject() == null);
}
return equalNames && equalValues;
}
@Override
public int hashCode() {
if (getAttribute() == null ) throw new UnsupportedOperationException("Attribute is null cannot compute hashCode ");
return this.encode().hashCode();
}
}