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CrossArtefact Information Retrieval

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motivation why do we need cross-artefact analysis. the tool s architecture. the database ... a Cross-Artefact Query. declare function EJBsWithCMT() as element ... – PowerPoint PPT presentation

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Title: CrossArtefact Information Retrieval

1
Cross-Artefact Information Retrieval

Michael Eichberg
Klaus Ostermann
Mira Mezini
Thorsten Schäfer

2
outline

motivation why do we need cross-artefact
analysis
the tools architecture
the database
how to retrieve information introduction to
XQuery
integration in Eclipse
Examplesdetecting bad smells / violations of
best practices / errors

3
a Projects Artefacts are diverse
.properties
XML
Java
4
and the stored information is related
5
Are these two types related?
public interface Test extends EJBObject
String getText()
?
public class TestBean implements SessionBean
public String getText()
6
Are these two types related?
Yes!
public interface Test extends EJBObject
String getText()
?
public class TestBean implements SessionBean
public String getText()
Deployment Descriptor
ltenterprise-beansgt ltsessiongt ltejb-namegtHel
loWorldTestBeanlt/ejb-namegt lthomegtde.tud.xirc.pla
yground.TestHomelt/homegt ltremotegtde.tud.xirc.play
ground.Testlt/remotegt ltejb-classgtde.tud.xirc.play
ground.TestBeanlt/ejb-classgt ltsession-typegtStatel
esslt/session-typegt lttransaction-typegtContainerlt/
transaction-typegt lt/sessiongt lt/enterprise-beansgt
7
What is the transaction attribute?
ltenterprise-beansgt ltsessiongt ltejb-namegtHelloWor
ldTestBeanlt/ejb-namegt lthomegtde.tud.xirc.playgrou
nd.TestHomelt/homegt ltremotegtde.tud.xirc.playgroun
d.Testlt/remotegt ltejb-classgtde.tud.xirc.playgroun
d.TestBeanlt/ejb-classgt ltsession-typegtStatelesslt/
session-typegt lttransaction-typegtContainerlt/trans
action-typegt lt/sessiongt lt/enterprise-beansgt ltcont
ainer-transactiongt ltmethodgt ltejb-namegtHelloWorl
dTestBeanlt/ejb-namegt ltmethod-namegtgetTextlt/metho
d-namegt lt/methodgt lttrans-attributegtRequiredlt/tra
ns-attributegt lt/container-transactiongt
Java Code
public interface Test extends EJBObject
String getText() throws RemoteException Str
ing getValue() throws RemoteException String
getValue(int i) throws RemoteException String
getNoValue() throws RemoteException
Deployment Descriptor
8
What is the transaction attribute?
ltenterprise-beansgt ltsessiongt ltejb-namegtHelloWor
ldTestBeanlt/ejb-namegt lthomegtde.tud.xirc.playgrou
nd.TestHomelt/homegt ltremotegtde.tud.xirc.playgroun
d.Testlt/remotegt ltejb-classgtde.tud.xirc.playgroun
d.TestBeanlt/ejb-classgt ltsession-typegtStatelesslt/
session-typegt lttransaction-typegtContainerlt/trans
action-typegt lt/sessiongt lt/enterprise-beansgt ltcont
ainer-transactiongt ltmethodgt ltejb-namegtHelloWorl
dTestBeanlt/ejb-namegt ltmethod-namegtgetTextlt/metho
d-namegt lt/methodgt lttrans-attributegtRequiredlt/tra
ns-attributegt lt/container-transactiongt
ltenterprise-beansgt ltsessiongt ltejb-namegtHelloWor
ldTestBeanlt/ejb-namegt lthomegtde.tud.xirc.playgrou
nd.TestHomelt/homegt ltremotegtde.tud.xirc.playgroun
d.Testlt/remotegt ltejb-classgtde.tud.xirc.playgroun
d.TestBeanlt/ejb-classgt ltsession-typegtStatelesslt/
session-typegt lttransaction-typegtContainerlt/trans
action-typegt lt/sessiongt lt/enterprise-beansgt ltcont
ainer-transactiongt ltmethodgt ltejb-namegtHelloWorl
dTestBeanlt/ejb-namegt ltmethod-namegtgetTextlt/metho
d-namegt lt/methodgt lttrans-attributegtRequiredlt/tra
ns-attributegt lt/container-transactiongt
searching the deployment descriptor in the local
FS
Java Code
public interface Test extends EJBObject
String getText() throws RemoteException Str
ing getValue() throws RemoteException String
getValue(int i) throws RemoteException String
getNoValue() throws RemoteException
Deployment Descriptor
9
the Architecture of XIRC
Project Sources
.java .class
Query
.jar
XIRC XML-Database
.properties
.xml
10
the XML-Database (excerpt)

ltdball xmlnsdb"http//.../XMLDB(5/20/04)"gt
ltdbdocument type"source" documentID"file/D/.
../HelloWorld/bin/test/Test.class"
tag"de.tud.xirc.processor.input.ClassFileInputPro
cessor"gt
ltclass xmlns"http//.../BAT2-Java1.5(12/7/04)"
name"test.Test" visibility"public" gt
ltinheritsgt ltclass name"java.lang.Object" /gt
lt/inheritsgt
ltmethod name"ltinitgt" visibility"public" ...gt
ltsignaturegt ltreturns type"void" /gt lt/signaturegt
ltcodegt
ltload index"0" lineNumber"15" /gt
ltinvoke declaringClassName"java.lang.Object m
ethodName"ltinitgt" specialMethod"true" ...gt
ltsignaturegt ltreturns type"void" /gt
lt/signaturegt
lt/invokegt
ltreturn lineNumber"15" /gt
lt/codegt
lt/methodgt
lt/classgt
lt/dbdocumentgt
lt/dballgt

11
a View of the Database in Eclipse
12
using XQuery for Information Retrieval

functional query language especially well suited
for XML Datasources
integrates well with other XML technologies(e.g.
Namespaces)
still under development (but already widely
adopted)

13
XQuery Path Expressions
ltdballgt ltdbdocumentgt ltclass name"test.Test"
visibility"public" gt ltinheritsgt ltclass
name"java.lang.Object"/gt lt/inheritsgt lt/classgt lt/
dbdocumentgt ltdbdocumentgt ltclass
name"test.SubTest" visibility"public"
gt ltinheritsgt ltclass nametest.Test"/gt
lt/inheritsgt lt/classgt lt/dbdocumentgt lt/dballgt
/
14
XQuery Path Expressions
ltdballgt ltdbdocumentgt ltclass name"test.Test"
visibility"public" gt ltinheritsgt ltclass
name"java.lang.Object"/gt lt/inheritsgt lt/classgt lt/
dbdocumentgt ltdbdocumentgt ltclass
name"test.SubTest" visibility"public"
gt ltinheritsgt ltclass nametest.Test"/gt
lt/inheritsgt lt/classgt lt/dbdocumentgt lt/dballgt
/ dball
15
XQuery Path Expressions
ltdballgt ltdbdocumentgt ltclass name"test.Test"
visibility"public" gt ltinheritsgt ltclass
name"java.lang.Object"/gt lt/inheritsgt lt/classgt lt/
dbdocumentgt ltdbdocumentgt ltclass
name"test.SubTest" visibility"public"
gt ltinheritsgt ltclass nametest.Test"/gt
lt/inheritsgt lt/classgt lt/dbdocumentgt lt/dballgt
/ dball/ dbdocument/
16
XQuery Path Expressions
ltdballgt ltdbdocumentgt ltclass name"test.Test"
visibility"public" gt ltinheritsgt ltclass
name"java.lang.Object"/gt lt/inheritsgt lt/classgt lt/
dbdocumentgt ltdbdocumentgt ltclass
name"test.SubTest" visibility"public"
gt ltinheritsgt ltclass nametest.Test"/gt
lt/inheritsgt lt/classgt lt/dbdocumentgt lt/dballgt
/ dball/ dbdocument/ class
17
XQuery Path Expressions
ltdballgt ltdbdocumentgt ltclass name"test.Test"
visibility"public" gt ltinheritsgt ltclass
name"java.lang.Object"/gt lt/inheritsgt lt/classgt lt/
dbdocumentgt ltdbdocumentgt ltclass
name"test.SubTest" visibility"public"
gt ltinheritsgt ltclass nametest.Test"/gt
lt/inheritsgt lt/classgt lt/dbdocumentgt lt/dballgt
/ dball/ dbdocument/ class _at_name
test.SubTest
18
XQuery Function Variable Definitions
ltdballgt ltdbdocumentgt ltclass name"test.Test"
visibility"public" gt ltinheritsgt ltclass
name"java.lang.Object"/gt lt/inheritsgt lt/classgt lt/
dbdocumentgt ltdbdocumentgt ltclass
name"test.SubTest" visibility"public"
gt ltinheritsgt ltclass nametest.Test"/gt
lt/inheritsgt lt/classgt lt/dbdocumentgt lt/dballgt
supertypes( / dball/dbdocument/ class_at_name
test.SubTest )
declare function supertypes(classes as
element()) as element() let supertypes
xircall/(classinterface) _at_nameclasse
s/inherits/(classinterface)/_at_name return
if (empty(supertypes)) then
classes else classes union
supertypes(supertypes)
19
XQuery Set Operations
select all classes that do not define the
toString method
let all xircproject-sources/class_at_abstract
"false" return all except
all/method _at_name"toString" and
empty(./signature/parameter) ( and
./signature/returns/_at_type "java.lang.String"
) /..
20
Bad Smells
21
a Cross-Artefact Query
detect all methods with bean managed transactions
(BMT) for which container managed transactions
are specified (CMT)

declare function EJBsWithCMT() as element()
let ejbname /ejb-jar/enterprise-beans
/(session message-driven)/transaction-type
./text() "Container"/../ejb-class/text()
return /class_at_name ejbname
declare function methodsWithBMT() as element()
//invoke_at_declaringClassName
"javax.transaction.UserTransaction"/
ancestormethod
methodsWithBMT() intersect EJBsWithCMT()//method

22
a Cross-Artefact Query
detect all methods with bean managed transactions
(BMT) for which container managed transactions
are specified (CMT)

declare function EJBsWithCMT() as element()
let ejbname //ejb-jar/enterprise-beans
/(session message-driven)/transaction-type
./text() "Container"/../ejb-class/text()
return //class_at_name ejbname
declare function methodsWithBMT() as element()
//invoke_at_declaringClassName
"javax.transaction.UserTransaction"/
ancestormethod
methodsWithBMT() intersect EJBsWithCMT()//method

ltenterprise-beansgt ltsessiongt ltejb-namegtHelloWor
ldTestBeanlt/ejb-namegt lthomegtde.tud.xirc.playgrou
nd.TestHomelt/homegt ltremotegtde.tud.xirc.playgroun
d.Testlt/remotegt ltejb-classgtde.tud.xirc.playgroun
d.TestBeanlt/ejb-classgt ltsession-typegtStatelesslt/
session-typegt lttransaction-typegtContainerlt/trans
action-typegt lt/sessiongt lt/enterprise-beansgt
23
a Cross-Artefact Query
detect all methods with bean managed transactions
(BMT) for which container managed transactions
are specified (CMT)

declare function EJBsWithCMT() as element()
let ejbname //ejb-jar/enterprise-beans
/(session message-driven)/transaction-type
./text() "Container"/../ejb-class/text()
return //class_at_name ejbname
declare function methodsWithBMT() as element()
//invoke_at_declaringClassName
"javax.transaction.UserTransaction"/
ancestormethod
methodsWithBMT() intersect EJBsWithCMT()//method

24
a Cross-Artefact Query
detect all methods with bean managed transactions
(BMT) for which container managed transactions
are specified (CMT)

declare function EJBsWithCMT() as element()
let ejbname //ejb-jar/enterprise-beans
/(session message-driven)/transaction-type
./text() "Container"/../ejb-class/text()
return //class_at_name ejbname
declare function methodsWithBMT() as element()
//invoke_at_declaringClassName
"javax.transaction.UserTransaction"/
ancestormethod
methodsWithBMT() intersect EJBsWithCMT()//method

25
Bad Smells
26
performance?

good but could be improved
XML database with 2833 class entries(all public
classes and interfaces of all Java5 APIs, except
for classes in the javax.swing. and java.awt.
packages) The evaluation of 48 queries against
the project code generated 51 warnings and 2
errors and was executed in 3.56 seconds.
To keep the XIRC database for this project in
memory approximately 40 MB are required.

27
a Query Container

defines one to multiple related queries
can define a context defining query(makes sense
only for query containers defining multiple
related queries)
Defines the scope for the evaluation
DB scoped queries
easier to develop
slower for incremental builds
Document scoped
very fast with incremental builds
query is not allowed to take other non-library
documents into account

28
a Query Container - Example