/**
* Generates a List of PropertyHelper objects, which can be displayed in a tableviewer.
*
* <p>
*
* @param allSelHisObjs Selection of HistoryObjects
* @return List
* @throws Exception
*/
public List<PropertyVersionHelper> generatePropertyVersionsList(List<IEntity> allSelHisObjs)
throws Exception {
// clear old lists, maps first...
previousProps.clear();
changes.clear();
if (null == allSelHisObjs || allSelHisObjs.isEmpty()) {
return changes;
}
IEntity entityD = (IEntity) allSelHisObjs.get(0);
DAO dao = DAOSystem.findDAOforEntity(entityD.type().getName());
EntityDescriptor descrip =
ConfigurationManager.getSetup().getEntityDescriptor(entityD.type().getName());
// get reflection stuff
BeanInfo info = Introspector.getBeanInfo(entityD.getClass());
PropertyDescriptor[] descs = info.getPropertyDescriptors();
// go through all properties
for (int i = 0; i < descs.length; i++) {
Method readPropMeth = descs[i].getReadMethod();
String propName = descs[i].getName();
Property prop = descrip.getProperty(propName);
// check right before getting on... if no right to
// access the property, ignore for history at all!
if (prop != null && !prop.hasReadAccess()) {
continue;
}
PropertyVersionHelper helperPropertyStorage =
new PropertyVersionHelper(readPropMeth, propName);
// check properties, which have to be ignored
boolean ignore =
propName.equals("entityVersion")
|| propName.equals("lastModifiedAt")
|| propName.equals("createdAt")
|| propName.equals("historyReason")
|| propName.equals("id")
|| propName.equals("localChanged");
if (ignore) {
continue;
}
// go through all versions objects
for (int j = 0; j < allSelHisObjs.size(); j++) {
IEntity entity = (IEntity) allSelHisObjs.get(j);
HistoryVersion versionWrap = new HistoryVersion(entity, false);
helperPropertyStorage.addVersion(j + 1, versionWrap);
// get actual value
Object actualValue = readPropMeth.invoke(entity, (Object[]) null);
// just a test to get the right version of the object ;)
if ((actualValue instanceof IEntity)
&& (!(actualValue instanceof IPicklistEntry))
&& prop.isEmbeddedEntity()) {
actualValue = dao.findCorrectVersionForEntityRelation(entity, (IEntity) actualValue);
}
// load all values of 1. version
if (j == 0) {
HistoryVersion versionWrap2 = new HistoryVersion(entity, false);
helperPropertyStorage.addVersion(0, versionWrap2);
previousProps.put(readPropMeth, actualValue);
continue;
}
// get previous value...
Object prevPropValue = previousProps.get(readPropMeth);
// replace previous value with new one
previousProps.put(readPropMeth, actualValue);
boolean changed = false;
// if both values not null -> compare with equals
if (actualValue != null && prevPropValue != null) {
if (!actualValue.equals(prevPropValue)) {
changed = true;
}
}
// if one value null the other not -> changed!
else if (actualValue == null && prevPropValue != null) {
changed = true;
}
// if one value null the other not -> changed!
else if (prevPropValue == null && actualValue != null) {
changed = true;
}
if (changed) {
versionWrap.setChanged(true);
// remove first necessary, list does not overwrite with
// add...
changes.remove(helperPropertyStorage);
// add again
changes.add(helperPropertyStorage);
}
}
}
return changes;
}
