Related
I want to get max value of date field for whole collection 4programmers.
In mongo shell I can write:
db.getCollection("4programmers").aggregate([
{
$group:
{
_id: null,
max : {$max: "$date"}
}
}
])
and it returns a document with the date ISODate("2017-10-20T17:12:37.000+02:00") but when I write in java:
Date d = collection.aggregate(
Arrays.asList(
Aggregates.group("$date", Accumulators.max("maxx", "$date"))
)
).first().getDate("maxx");
System.out.println(d);
as a result I get: Fri Oct 20 00:44:50 CEST 2017
May something is wrong with first()?
First argument of Aggregates.group should be null instead of "$date" (it's actually _id: null).
So code should look like:
Date d = collection.aggregate(
Arrays.asList(
Aggregates.group(null, Accumulators.max("maxx", "$date"))
)
).first().getDate("maxx");
or you can do the same without Aggregates class:
collection.aggregate(asList(new Document("$group", new Document("_id", null)
.append("max", new Document("$max", "$date")))))
.first().getDate("max");
i want to get a list which contains entire OrderInfo Object, for example, if i do this, it is result which the result i want to.
def find_all(self):
result_list = []
orderDao = DaoUtil.DaoGeneric()
session = orderDao.getSession()
try:
for row in session.query(OrderInfo).all():
result_list.append({
'id':row.id,
'name': row.name,
'age': row.age,
'create_time': row.create_time.strftime("%Y-%m-%d %H:%M:%S"),
'update_time': row.update_time.strftime("%Y-%m-%d %H:%M:%S"),
'version': row.version
})
session.commit()
except Exception, e:
print e
session.rollback()
return result_list
but i want to a list which contains OrderInfo object from the query, because the result which the query return have other columns (the simple list of all DeclarativeBase's instances.) except OrderInfo{id,name,age,create_time,update_time,version}, the query do not return OrderInfo object directly. the following which i want to:
def find_all(self):
result_list = []
orderDao = DaoUtil.DaoGeneric()
session = orderDao.getSession()
try:
for row in session.query(OrderInfo).all():
result_list.append(row.orderInfo) // if the row has a property for orderInfo Object, because the result which java can achieve , the example for java is : List<OrderInfo> orderList = session.query(); please help to achieve it
session.commit()
except Exception, e:
print e
session.rollback()
return result_list
beacause i use sqlalchemy in python just now, i am not very sure. How to get a list which contains OrderInfo Object from query in sqlalchemy
#univerio
for row in session.query(OrderInfo).all():
the line of variable 's row which includes the following column:
_decl_class_registry,
_sa_class_manager,
_sa_instance_state,
metadata,
query,
id,
name,
age,
create_time,
update_time ,
version
only this (OrderInfo{id, name, age, create_time,update_time,version}) is what i want to get, other columns which i do not want to get.
OrderInfo:
from sqlalchemy import Column, Integer, String, Date, DateTime
from sqlalchemy.ext.declarative import declarative_base
Base=declarative_base()
class OrderInfo(Base):
__tablename__ = 'order_info'
# __table__ = 'order_info'
id = Column(Integer, primary_key=True)
name = Column(String(100))
age = Column(Integer)
create_time = Column(Date)
update_time = Column(Date)
version = Column(Integer)
#univerio, i write here because the comments has limit of words, it achieve this result, like this:
for row in session.query(OrderInfo).all():
result_list.append({
'id':row.id,
'name': row.name,
'age': row.age,
'create_time': row.create_time.strftime("%Y-%m-%d %H:%M:%S"),
'update_time': row.update_time.strftime("%Y-%m-%d %H:%M:%S"),
'version': row.version
})
the OrderInfo has very few columns, if the OrderInfo object has more than serveral hundred columns， but it will take a long time, so i want find the result which can simple achieve this function that is similar to List in Java
#univerio,
i find the answer which i want to get:
def find_all(self):
result_list = []
orderDao = DaoUtil.DaoGeneric()
session = orderDao.getSession()
try:
for row in session.query(OrderInfo).all():
result_list.append(DictUtil.object_as_dict(row))
session.commit()
except Exception, e:
print e
session.rollback()
return result_list
def object_as_dict(obj):
result = {instance.key: getattr(obj, instance.key) for instance in inspect(obj).mapper.column_attrs}
print result
return result
output :
[
{'updateTime': datetime.datetime(2017, 6, 15, 13, 56, 16), 'bankName': u'ICBC', 'bankNo': u'6228480666622220011', 'createTime': datetime.datetime(2017, 6, 15, 13, 56, 16), u'version': 0, u'id': 1},
{'updateTime': datetime.datetime(2017, 6, 15, 13, 57, 40), 'bankName': u'ICBC', 'bankNo': u'6228480666622220011', 'createTime': datetime.datetime(2017, 6, 15, 13, 57, 40), u'version': 0, u'id': 2},
{'updateTime': datetime.datetime(2017, 6, 15, 13, 58), 'bankName': u'ICBC', 'bankNo': u'6228480666622220011', 'createTime': datetime.datetime(2017, 6, 15, 13, 58), u'version': 0, u'id': 3}
]
I've been following this tutorial on how to use WEKA and I have reached a point where my code will not run. I realize that I am using a different version of Weka 3.8 as opposed to 3.6 as shown in the tutorial but I thought I made the necessary changes. I get an error message on the line linearRegression.buildClassifier(dataset); and I don't know why.
Error message:
Jul 19, 2016 10:47:21 AM com.github.fommil.netlib.BLAS <clinit>
WARNING: Failed to load implementation from: com.github.fommil.netlib.NativeSystemBLAS
Jul 19, 2016 10:47:21 AM com.github.fommil.netlib.BLAS <clinit>
WARNING: Failed to load implementation from: com.github.fommil.netlib.NativeRefBLAS
Jul 19, 2016 10:47:21 AM com.github.fommil.netlib.LAPACK <clinit>
WARNING: Failed to load implementation from: com.github.fommil.netlib.NativeSystemLAPACK
Jul 19, 2016 10:47:21 AM com.github.fommil.netlib.LAPACK <clinit>
WARNING: Failed to load implementation from: com.github.fommil.netlib.NativeRefLAPACK
Code:
// Define each attribute (or column), and give it a numerical column
// number
// Likely, a better design wouldn't require the column number, but
// would instead get it from the index in the container
Attribute a1 = new Attribute("houseSize", 0);
Attribute a2 = new Attribute("lotSize", 1);
Attribute a3 = new Attribute("bedrooms", 2);
Attribute a4 = new Attribute("granite", 3);
Attribute a5 = new Attribute("bathroom", 4);
Attribute a6 = new Attribute("sellingPrice", 5);
// Each element must be added to a FastVector, a custom
// container used in this version of Weka.
// Later versions of Weka corrected this mistake by only
// using an ArrayList
ArrayList<Attribute> attrs = new ArrayList<>();
attrs.add(a1);
attrs.add(a2);
attrs.add(a3);
attrs.add(a4);
attrs.add(a5);
attrs.add(a6);
// Each data instance needs to create an Instance class
// The constructor requires the number of columns that
// will be defined. In this case, this is a good design,
// since you can pass in empty values where they exist.
Instance i1 = new DenseInstance(6);
i1.setValue(a1, 3529);
i1.setValue(a2, 9191);
i1.setValue(a3, 6);
i1.setValue(a4, 0);
i1.setValue(a5, 0);
i1.setValue(a6, 205000);
Instance i2 = new DenseInstance(6);
i1.setValue(a1, 3247);
i1.setValue(a2, 10061);
i1.setValue(a3, 5);
i1.setValue(a4, 1);
i1.setValue(a5, 1);
i1.setValue(a6, 224900);
Instance i3 = new DenseInstance(6);
i1.setValue(a1, 4032);
i1.setValue(a2, 10150);
i1.setValue(a3, 5);
i1.setValue(a4, 0);
i1.setValue(a5, 1);
i1.setValue(a6, 197900);
Instance i4 = new DenseInstance(6);
i1.setValue(a1, 2397);
i1.setValue(a2, 14156);
i1.setValue(a3, 4);
i1.setValue(a4, 1);
i1.setValue(a5, 0);
i1.setValue(a6, 189900);
Instance i5 = new DenseInstance(6);
i1.setValue(a1, 2200);
i1.setValue(a2, 9600);
i1.setValue(a3, 4);
i1.setValue(a4, 0);
i1.setValue(a5, 1);
i1.setValue(a6, 195000);
Instance i6 = new DenseInstance(6);
i1.setValue(a1, 3536);
i1.setValue(a2, 19994);
i1.setValue(a3, 6);
i1.setValue(a4, 1);
i1.setValue(a5, 1);
i1.setValue(a6, 325000);
Instance i7 = new DenseInstance(6);
i1.setValue(a1, 2983);
i1.setValue(a2, 9365);
i1.setValue(a3, 5);
i1.setValue(a4, 0);
i1.setValue(a5, 1);
i1.setValue(a6, 230000);
// Each Instance has to be added to a larger container, the
// Instances class. In the constructor for this class, you
// must give it a name, pass along the Attributes that
// are used in the data set, and the number of
// Instance objects to be added. Again, probably not ideal design
// to require the number of objects to be added in the constructor,
// especially since you can specify 0 here, and then add Instance
// objects, and it will return the correct value later (so in
// other words, you should just pass in '0' here)
Instances dataset = new Instances("housePrices", attrs, 7);
dataset.add(i1);
dataset.add(i2);
dataset.add(i3);
dataset.add(i4);
dataset.add(i5);
dataset.add(i6);
dataset.add(i7);
// In the Instances class, we need to set the column that is
// the output (aka the dependent variable). You should remember
// that some data mining methods are used to predict an output
// variable, and regression is one of them.
dataset.setClassIndex(dataset.numAttributes() - 1);
// Create the LinearRegression model, which is the data mining
// model we're using in this example
linearRegression = new LinearRegression();
try {
// This method does the "magic", and will compute the regression
// model. It takes the entire dataset we've defined to this point
// When this method completes, all our "data mining" will be
// complete
// and it is up to you to get information from the results
linearRegression.buildClassifier(dataset);
} catch (Exception e) {
e.printStackTrace();
}
}
That is not an error, but a warning. Weka cannot find some Linear Algebra Libraries (LAPACK, BLAS) during the startup of your little java app. It does not need them anyway, for the linear regression task of fitting a curve to 7 data points.
(Read this for reference https://github.com/fommil/netlib-java)
To get rid of the message, you can redirect the STDERR output of your program to /dev/null .
Using the Package Manager, I just installed the Weka Package netlibNativeLinux (or try netlibNativeWindows or netlibOSX, whatever), included its jars to the build-path, and got this warning:
Jul 20, 2016 10:20:32 AM com.github.fommil.jni.JniLoader liberalLoad
INFO: successfully loaded /tmp/jniloader5044252696376965086netlib-native_system-linux-x86_64.so
Jul 20, 2016 10:20:32 AM com.github.fommil.jni.JniLoader load
INFO: already loaded netlib-native_system-linux-x86_64.so
I also got the output 219328.35717359098 - just as the tutorial said. Did you forget to include the last lines of codes from the tutorial, especially
System.out.println(myHouseValue);
?
I started to work with Lotus Notes 8.5, and i have to create meetings in Lotus by using Java, lotus.domino and Notes.jar.
So, to do this, i create a new Document and fill it with all the needed fields (i think). This is how i create my meeting :
Document newDocument = db.createDocument();
newDocument.appendItemValue("Body", "Create meeting from java.");
newDocument.appendItemValue("Notes", "Test Notes");
newDocument.appendItemValue("Chair", "Me");
newDocument.appendItemValue("Principal", "Me");
newDocument.appendItemValue("$altPrincipal", "Me");
newDocument.appendItemValue("ExcludeFromView", "D,S");
newDocument.appendItemValue("UpdateSeq", 1);
newDocument.appendItemValue("$CSVersion", "2");
newDocument.appendItemValue("$SMTPKeepNotesItems", "1");
newDocument.appendItemValue("$CSWISL", "$S:1,$L:1,$B:1,$R:1,$E:1,$W:1,$O:1,$M:1,RequiredAttendees:1,INetRequiredNames:1,AltRequiredNames:1,StorageRequiredNames:1,OptionalAttendees:1,INetOptionalNames:1,AltOptionalNames:1,StorageOptionalNames:1,ApptUNIDURL:1,STUnyteConferenceURL:1,STUnyteConferenceID:1,SametimeType:1,WhiteBoardContent:1,STRoomName:1");
newDocument.appendItemValue("WebDateTimeInit", "1");
newDocument.appendItemValue("OrgTable", "C0");
newDocument.appendItemValue("$AlarmDisabled", "1");
newDocument.appendItemValue("$HFFlags", "1");
newDocument.appendItemValue("Form", "Appointment");
newDocument.appendItemValue("$FromPreferredLanguage", "fr");
newDocument.appendItemValue("ApptUNID", "267DEFCD6ADE4EF8C1257DF600464A1B642");
newDocument.appendItemValue("$LangChair", "");
newDocument.appendItemValue("AppointmentType", "3");
newDocument.appendItemValue("$TableSwitcher", "Description");
newDocument.appendItemValue("OnlineMeeting", "");
newDocument.appendItemValue("From", "Me");
newDocument.appendItemValue("AltChair", "Me");
newDocument.appendItemValue("OnlinePlace", "");
newDocument.appendItemValue("IsBroadcast", "");
newDocument.appendItemValue("$ExpandGroups", 3);
newDocument.appendItemValue("IsTeamCalendar", "");
newDocument.appendItemValue("Importance", "");
newDocument.appendItemValue("OrgConfidential", "");
newDocument.appendItemValue("Subject", "Meeting test from Java");
newDocument.appendItemValue("PreventCounter", "");
newDocument.appendItemValue("Location", "R1");
newDocument.appendItemValue("RoomToReserve", "");
newDocument.appendItemValue("Resources", "");
newDocument.appendItemValue("$PaperColor", 1);
newDocument.appendItemValue("STRecordMeeting", "");
newDocument.appendItemValue("WhiteBoardContent", "");
newDocument.appendItemValue("Categories", "");
newDocument.appendItemValue("$BorderColor", "7F96A3");
newDocument.appendItemValue("$WatchedItems", "$S,$L,$B,$R,$E,$W,$O,$M,RequiredAttendees,INetRequiredNames,AltRequiredNames,StorageRequiredNames,OptionalAttendees,INetOptionalNames,AltOptionalNames,StorageOptionalNames,ApptUNIDURL,STUnyteConferenceURL,STUnyteConferenceID,SametimeType,WhiteBoardContent,STRoomName");
newDocument.appendItemValue("CalForwardChairNotificationTo", "");
newDocument.appendItemValue("ReturnReceipt", "");
newDocument.appendItemValue("PreventDelegate", "");
newDocument.appendItemValue("EnterSendTo", "");
newDocument.appendItemValue("EnterCopyTo", "");
newDocument.appendItemValue("EnterBlindCopyTo", "");
newDocument.appendItemValue("ConferenceCallInfo", "");
newDocument.appendItemValue("SchedulerSwitcher", "1");
newDocument.appendItemValue("$Abstract", "");
newDocument.appendItemValue("StartTimeZone", "Z=-1$DO=1$DL=3 -1 1 10 -1 1$ZN=Western/Central Europe");
newDocument.appendItemValue("EndTimeZone", "Z=-1$DO=1$DL=3 -1 1 10 -1 1$ZN=Western/Central Europe");
newDocument.appendItemValue("NewStartTimeZone", "");
newDocument.appendItemValue("NewEndTimeZone", "");
newDocument.appendItemValue("Encrypt", "Représentation invalide. (undefined)");
newDocument.appendItemValue("Sign", "");
newDocument.appendItemValue("MeetingType", "");
newDocument.appendItemValue("$PublicAccess", "1");
newDocument.appendItemValue("StartDate", "27/02/2015");
newDocument.appendItemValue("StartTime", "11:00:00");
newDocument.appendItemValue("STARTDATETIME", s.createDateTime(new GregorianCalendar(2015, 02, 27, 11, 0, 0)));
newDocument.appendItemValue("EndDate", "27/02/2015");
newDocument.appendItemValue("EndTime", "13:00:00");
newDocument.appendItemValue("EndDateTime", s.createDateTime(new GregorianCalendar(2015, 02, 27, 13, 0, 0)));
newDocument.appendItemValue("CalendarDateTime", s.createDateTime(new GregorianCalendar(2015, 02, 27, 11, 0, 0)));
newDocument.appendItemValue("_ViewIcon", 158);
newDocument.appendItemValue("$ShowComments", "Normal");
newDocument.appendItemValue("$ShowDescription", "Show");
newDocument.appendItemValue("$BusyName", "Me");
newDocument.appendItemValue("$BusyPriority", "1");
newDocument.appendItemValue("SequenceNum", 2);
newDocument.appendItemValue("$CSTrack", "Imported from my contacts at 02/24/2015 14:00:17");
newDocument.appendItemValue("$NoPurge", s.createDateTime(new GregorianCalendar(2015, 02, 27, 13, 0, 0)));
newDocument.appendItemValue("$UpdatedBy", "Me");
newDocument.appendItemValue("$Revisions", s.createDateTime(new GregorianCalendar(2015, 02, 24, 13, 48, 31)));
newDocument.appendItemValue("tmpUseLongDate", s.createDateTime(new GregorianCalendar(2015, 02, 27, 11, 0, 0)));
newDocument.appendItemValue("tmpEventLabel", "Meeting from Java (tmpEventLabel)");
newDocument.appendItemValue("dispRepeatText", "Meeting from Java (dispRepeatText)");
newDocument.appendItemValue("tmpHideTimeZone", "");
newDocument.appendItemValue("tmpStartDate1", "27/02/2015");
newDocument.save();
When i came back to Lotus, the meeting is created and shown in the calendar.
The problem is, whatever field i add or remove, when i click on this meeting, Lotus throw me an error, saying (approximate translation from french):
Field : 'tmpStartDate1' : Temporary data required for operator or # function
So i add this new field in java, launch the program, create a meeting, and...
Field : 'tmpHideTimeZone' : Temporary data required for operator or # function
For now, it is the 5th field Lotus asked me with this message....
All 'tmp******' fields are missing, but i don't know them. I thought those fields could be generated by Lotus, because of the 'tmp', but how ?
I compare with other meetings created with Lotus Notes, and there are no such 'tmp' fields.
Any ideas ?
EDIT :
I tried this :
newDocument.computeWithForm(true, true);
It throws a NotesException if your document isn't in a good format.
When i execute my code (approximate translation again...) :
NotesException: Incorrect data type in the field.
I tried computeWithForm in another program where I create and add a contact to Lotus, and i didn't get any errors.
So indeed, there is a problem with meeting's fields...
EDIT :
Any new ideas ? I am a bit confused about how to develop on this software....
Items have types too ! Also a date is not a string, a date is a complicated animal, looks innocuous at first sight, but can bite very hard.
The Document.appendItemValue method coerces the item to be of Text type.
For date/time (not temporary ;-) items you should use Document.ReplaceItemValueCustomData and pass it an argument of class DateTime.
I'm looking for a library or helper class in Java that would allow me to perform date interval sum and subtractions.
For example, lets's say I have the following date intervals:
A = ["2015-01-01 00:00", "2015-01-20 00:00"]
B = ["2015-01-05 00:00", "2015-01-10 00:00"]
C = ["2015-01-11 00:00", "2015-01-14 00:00"]
D = ["2015-01-19 00:00", "2015-01-25 00:00"]
1 A 20
|----------------------------------|
|---------| |----------| |------------|
5 B 10 11 C 14 19 D 25
And let's say I'd like to calculate the following:
A - B - C + D = { ["2015-01-01 00:00", "2015-01-05 00:00"[,
]"2015-01-10 00:00", "2015-01-11 00:00"[,
]"2015-01-14 00:00", "2015-01-25 00:00"] }
1 5 10 11 14 25
|---| |---| |----------------|
I know I can build my own logic using pure Java, but I'd rather not reinvent the wheel...
I was looking into Joda-Time, but I couldn't figure out how to perform such operations using it.
Thanks a lot!
I found exactly what I needed: Ranges, from the guava-libraries.
Works like this:
Range<Date> a = Range.closed(
new GregorianCalendar(2015, 0, 1).getTime(),
new GregorianCalendar(2015, 0, 20).getTime());
Range<Date> b = Range.closed(
new GregorianCalendar(2015, 0, 5).getTime(),
new GregorianCalendar(2015, 0, 10).getTime());
Range<Date> c = Range.closed(
new GregorianCalendar(2015, 0, 11).getTime(),
new GregorianCalendar(2015, 0, 14).getTime());
Range<Date> d = Range.closed(
new GregorianCalendar(2015, 0, 19).getTime(),
new GregorianCalendar(2015, 0, 25).getTime());
RangeSet<Date> result = TreeRangeSet.create();
result.add(a);
result.remove(b);
result.remove(c);
result.add(d);
System.out.println(result);
The code above prints:
[
[Thu Jan 01 00:00:00 BRST 2015‥Mon Jan 05 00:00:00 BRST 2015),
(Sat Jan 10 00:00:00 BRST 2015‥Sun Jan 11 00:00:00 BRST 2015),
(Wed Jan 14 00:00:00 BRST 2015‥Sun Jan 25 00:00:00 BRST 2015]
]
I think it can be done basically using Joda-Time with some custom code. It is assumed that A is the Interval which all other intervals should relate to.
While this code should give the expected results (and should work for different values accordingly) I highly suggest testing it with very different data, especially for the three cases a) an interval not intersecting A at all, b) intersecting A at the beginning and c) an interval which itself intersects B or C or D.
So despite this, it might help for further tests.
Interval a = new Interval(Instant.parse("2015-01-01T00:00Z"), Instant.parse("2015-01-20T00:00Z"));
List<Interval> l = Arrays.asList(
/* b */ new Interval(Instant.parse("2015-01-05T00:00Z"), Instant.parse("2015-01-10T00:00Z")),
/* c */ new Interval(Instant.parse("2015-01-11T00:00Z"), Instant.parse("2015-01-14T00:00Z")),
/* d */ new Interval(Instant.parse("2015-01-19T00:00Z"), Instant.parse("2015-01-25T00:00Z"))
);
List<Interval> results = new ArrayList<Interval>();
for (Interval i : l) {
if (a.contains(i)) {
// if i is completely inside a, then calculate the first part and the remaining part
// whereas the first part will be added to the result
Interval firstPart = new Interval(a.getStart(), i.getStart());
results.add(firstPart);
// followed by i itself (skipped)
// part after i, inside a
Interval remainingPart = new Interval(i.getEnd(), a.getEnd());
a = remainingPart;
} else if (i.overlaps(a)) {
// if the intervals only overlap, then we take the earliest beginning and the latest ending as a result part
DateTime overlapMin = (a.getStart().isBefore(i.getStart())) ? a.getStart() : i.getStart();
DateTime overlapMax = (a.getEnd().isAfter(i.getEnd())) ? a.getEnd() : i.getEnd();
Interval overlapAndBothParts = new Interval(overlapMin, overlapMax);
results.add(overlapAndBothParts);
// if the checked interval i is at the beginning, then a will become the part after this "overlap"
if (i.getStartMillis() < a.getStartMillis()) {
Interval whatsLeft = new Interval(i.getEndMillis(), a.getEndMillis());
a = whatsLeft;
}
}
}
// print result
for (Interval i : results) {
System.out.println("result part: " + i);
}