/** {@inheritDoc} */
@Override
protected void doDispose() {
printDebugInfo("DISPOSE");
DynamicValueProperty property = _dalProperty;
setDalProperty(null);
if (property != null && !property.isDestroyed()) {
// remove link listener
property.removeLinkListener(this);
// remove value listeners
property.removeDynamicValueListener(this);
// remove response listeners
property.removeResponseListener(this);
// try to dispose the DAL property
PropertyFactory factory =
DALPropertyFactoriesProvider.getInstance()
.getPropertyFactory(getProcessVariableAddress().getControlSystem());
// if the property is not used anymore by other connectors,
// destroy it
if (property.getDynamicValueListeners().length <= 1
&& property.getResponseListeners().length <= 0) {
printDebugInfo("DESTROY");
factory.getPropertyFamily().destroy(property);
// <**** Workarround (FIXME: Remove, when DAL is fixed) ***
// DAL caches a reference to a former ResponseListener
// via its latestResponse and latestRequest fields on
// DynamicValuePropertyImpl.class
// ********************************************************
/*
* try { Object e = property.getLatestResponse();
*
* property.getAsynchronous(null);
*
* while (e == property.getLatestResponse()) { Thread.sleep(1);
* } } catch (DataExchangeException e) { e.printStackTrace(); }
* catch (InterruptedException e) { e.printStackTrace(); }
*/
// **** Workarround (Remove, when DAL is fixed)************>
assert !factory.getPropertyFamily().contains(property)
: "!getPropertyFactory().getPropertyFamily().contains(property)";
}
}
}
/** {@inheritDoc} */
protected void doInit() {
// get or create a real DAL property
DynamicValueProperty property = null;
try {
RemoteInfo ri = getProcessVariableAddress().toDalRemoteInfo();
PropertyFactory factory =
DALPropertyFactoriesProvider.getInstance()
.getPropertyFactory(getProcessVariableAddress().getControlSystem());
switch (getValueType()) {
case OBJECT:
property = factory.getProperty(ri);
break;
case STRING:
/*
* swende: 2010-03-06: this is a dirty quickfix which is related
* to problems with SDS displays that specifiy
* "pv[severity], String" as pv address / please remove if it
* does not work as expected or when all current SDS files at
* DESY have been propertly changed
*/
String characteristic = getProcessVariableAddress().getCharacteristic();
// If connection is made as pv[severity] or just pv, than ignore everything
// and go to default. In all other cases (e.g. pv[graphMin}, string), create
// a default property.
if (characteristic != null
&& !CharacteristicInfo.C_SEVERITY.getName().equals(characteristic)) {
property = factory.getProperty(ri);
break;
}
default:
property = factory.getProperty(ri, getValueType().getDalType(), null);
break;
}
if (property != null) {
setDalProperty(property);
}
} catch (Throwable e) {
forwardError(e.getLocalizedMessage());
}
}