/**
* For each port of the given entity, if the port's derived level is greater than 0 (i.e., it is
* created automatically by the entity), store the persistent attributes of the port in a "port"
* XML element.
*
* @param entity The entity whose ports are looked at.
* @param output The output writer.
* @param depth The depth for the MoML output.
* @exception IOException If the output writer cannot be written to.
*/
public static void exportPortProperties(GTEntity entity, Writer output, int depth)
throws IOException {
if (entity instanceof Entity) {
Entity ptEntity = (Entity) entity;
for (Object portObject : ptEntity.portList()) {
Port port = (Port) portObject;
if (port.getDerivedLevel() == 0) {
continue;
}
boolean outputStarted = false;
for (Object attributeObject : port.attributeList()) {
Attribute attribute = (Attribute) attributeObject;
if (attribute.isPersistent()) {
if (!outputStarted) {
output.write(
StringUtilities.getIndentPrefix(depth)
+ "<port name=\""
+ port.getName()
+ "\">\n");
outputStarted = true;
}
attribute.exportMoML(output, depth + 1);
}
}
if (outputStarted) {
output.write(StringUtilities.getIndentPrefix(depth) + "</port>\n");
}
}
}
}
/**
* Check whether the attribute is unique in the given container.
*
* @param attribute The attribute to check.
* @param container The container.
* @exception IllegalActionException If the container already has an attribute in the same class.
*/
public static void checkUniqueness(Attribute attribute, NamedObj container)
throws IllegalActionException {
if (container instanceof EntityLibrary) {
return;
}
try {
container.workspace().getReadAccess();
List<? extends Attribute> attributeList = container.attributeList(attribute.getClass());
for (Attribute existingAttribute : attributeList) {
if (existingAttribute != attribute && existingAttribute.isPersistent()) {
_delete(attribute);
throw new IllegalActionException(
"Only 1 " + attribute.getClass().getSimpleName() + " can be used.");
}
}
} finally {
container.workspace().doneReading();
}
}