MiningAPI Popularity - Semantic Scholar
Mining API Popularity # projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
Jan 2009
Yana Mileva,Valentin Dallmeier, Andres Zeller Saarland University, Germany
Mining API Popularity java.io.StringBufferInputStream
API
java.io.StringReader java.io.PrintStream ...
Mining API Popularity
popular/used
unpopular/unused
Mining API Popularity import java.util.Iterator; import java.util.List; import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger { import java.util.Iterator; import java.util.List; private boolean mungeNewParent(BcelClassWeaver weaver) import java.util.Set; import java.util.Iterator; { import java.util.List; LazyClassGen target = weaver.getLazyClassGen(); public class BcelTypeMunger extends ConcreteTypeMunger { import java.util.Set; boolean cont = true; cont = weaver) enforce_abstractMethods(weaver); private boolean public classmungeNewParent(BcelClassWeaver BcelTypeMunger extends ConcreteTypeMunger { { List methods = newParent.getWithoutIter(true); LazyClassGen target =mungeNewParent(BcelClassWeaver weaver.getLazyClassGen(); private boolean weaver) for (int i = 0; i < method.size(); i++){ boolean cont = true; { import java.util.Iterator; ResolvedMember superMethod = iter.next(); cont = enforce_abstractMethods(weaver); LazyClassGen target = weaver.getLazyClassGen(); import java.util.List; } boolean cont = true; import java.util.Set; } List methods = newParent.getWithoutIter(true); cont = enforce_abstractMethods(weaver); for (int i = 0; i < method.size(); i++){ public classsuperMethod BcelTypeMunger extends ConcreteTypeMunger { ResolvedMember = iter.next(); List methods = newParent.getWithoutIter(true); } for (int i = 0; i < method.size(); i++){ private boolean mungeNewParent(BcelClassWeaver weaver) } ResolvedMember superMethod = iter.next(); { } LazyClassGen target = weaver.getLazyClassGen(); } import java.util.Iterator; boolean cont = true; import java.util.List; cont = enforce_abstractMethods(weaver); import java.util.Iterator; import java.util.Set; import java.util.List; List methods = newParent.getWithoutIter(true); import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger for (int {i = 0; i < method.size(); i++){ superMethod = iter.next(); publicResolvedMember class BcelTypeMunger extends ConcreteTypeMunger { private boolean mungeNewParent(BcelClassWeaver weaver) } { } private boolean mungeNewParent(BcelClassWeaver weaver) LazyClassGen target = weaver.getLazyClassGen(); { boolean cont = true; LazyClassGen target = weaver.getLazyClassGen(); cont = enforce_abstractMethods(weaver); boolean cont = true; cont = enforce_abstractMethods(weaver); List methods = newParent.getWithoutIter(true); for (int i = 0; i < method.size(); i++){ List methods = newParent.getWithoutIter(true); ResolvedMember superMethod = iter.next(); for (int i = 0; i < method.size(); i++){ } ResolvedMember superMethod = iter.next(); } } }
Mining API Popularity • API quality • API usability • API compatibility • ...
How was it till now? bug-tracking systems
forums
• API quality • API usability • API compatibility • ...
documentation
emails and groups
Mining API Popularity import java.util.Iterator; import java.util.List; import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger {
import java.util.Iterator; import java.util.Iterator; import java.util.List; import java.util.List; import java.util.Set; import java.util.Set;
private boolean mungeNewParent(BcelClassWeaver weaver) { LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); public class BcelTypeMunger extends ConcreteTypeMunger {
public class BcelTypeMunger extends List methods = newParent.getWithoutIter(true); private boolean mungeNewParent(BcelClassWeaver weaver) ConcreteTypeMunger {
for (int i = 0; i < method.size(); i++){ import java.util.Iterator; ResolvedMember superMethod = iter.next(); LazyClassGen target = weaver.getLazyClassGen();
ts
{
ResolvedMember superMethod = iter.next(); { LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); import java.util.Iterator;
0
} } import java.util.Iterator; import java.util.List; import java.util.Set;
Pr oj ec
java.util.List; } private boolean import mungeNewParent boolean cont = true; import java.util.Set; } = enforce_abstractMethods(weaver); (BcelClassWeaver cont weaver) public class BcelTypeMunger extends ConcreteTypeMunger { { List methods = newParent.getWithoutIter(true); for (int i < method.size(); i++){ LazyClassGen target = i = 0; private boolean mungeNewParent(BcelClassWeaver weaver)
20
import java.util.List; List methods = newParent.getWithoutIter(true); import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger for (int {i = 0; i < method.size(); i++){ superMethod = iter.next(); publicResolvedMember class BcelTypeMunger extends ConcreteTypeMunger { private boolean mungeNewParent(BcelClassWeaver weaver) } { } private boolean mungeNewParent(BcelClassWeaver weaver) LazyClassGen target = weaver.getLazyClassGen(); { boolean cont = true; LazyClassGen target = weaver.getLazyClassGen(); cont = enforce_abstractMethods(weaver); boolean cont = true; cont = enforce_abstractMethods(weaver); List methods = newParent.getWithoutIter(true); for (int i = 0; i < method.size(); i++){ List methods = newParent.getWithoutIter(true); ResolvedMember superMethod = iter.next(); for (int i = 0; i < method.size(); i++){ } ResolvedMember superMethod = iter.next(); } } }
Jan’08
Jan’09
Mining API Popularity import java.util.Iterator; import java.util.List; import java.util.Set;
40
import java.util.Iterator; import java.util.Iterator; import java.util.List; import java.util.List; import java.util.Set; import java.util.Set;
private boolean mungeNewParent(BcelClassWeaver weaver) { LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); public class BcelTypeMunger extends ConcreteTypeMunger {
public class BcelTypeMunger extends List methods = newParent.getWithoutIter(true); private boolean mungeNewParent(BcelClassWeaver weaver) ConcreteTypeMunger {
for (int i = 0; i < method.size(); i++){ import java.util.Iterator; ResolvedMember superMethod = iter.next(); LazyClassGen target = weaver.getLazyClassGen(); import java.util.List; } mungeNewParent boolean cont = true; import java.util.Set; } cont = enforce_abstractMethods(weaver);
ts
{
{
ResolvedMember superMethod = iter.next();
LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); import java.util.Iterator;
0
} } import java.util.Iterator; import java.util.List; import java.util.Set;
Pr oj ec
private boolean (BcelClassWeaver weaver) public class BcelTypeMunger extends ConcreteTypeMunger { { List methods = newParent.getWithoutIter(true); for (int i < method.size(); i++){ LazyClassGen target = i = 0; private boolean mungeNewParent(BcelClassWeaver weaver)
20
import java.util.List; List methods = newParent.getWithoutIter(true); import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger for (int {i = 0; i < method.size(); i++){ ResolvedMember superMethod = iter.next(); public class BcelTypeMunger extends ConcreteTypeMunger { private boolean mungeNewParent(BcelClassWeaver weaver) } { } private boolean mungeNewParent(BcelClassWeaver weaver) LazyClassGen target = weaver.getLazyClassGen(); { boolean cont = true; LazyClassGen target = weaver.getLazyClassGen(); cont = enforce_abstractMethods(weaver); boolean cont = true; cont = enforce_abstractMethods(weaver); List methods = newParent.getWithoutIter(true); for (int i = 0; i < method.size(); i++){ List methods = newParent.getWithoutIter(true); ResolvedMember superMethod = iter.next(); for (int i = 0; i < method.size(); i++){ } ResolvedMember superMethod = iter.next(); } } }
Jan’08
Jan’09
# projects using an API element
public class BcelTypeMunger extends ConcreteTypeMunger {
35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
usage trends
Jan 2009
Who would benefit? # projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
API users
time span
Jan 2009
API producers
API users always want to use the best product want free of defects software don’t want to waste time
API producers want to produce good product want feedback from the users
Examples junit.framework.AssertionFailerError compatibility problems
# projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25
java.io.StringBufferInputStream code defect
20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
Jan 2009
java.lang.String - code smell
Hypothesis The past usage trend of an API element is predictive of the future usage trend of the same element.
Evaluation Scenario junit.framework.AssertionFailerError 35 30
Oct 2008
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25
Jan 2009
8 months
20 15 10
junit.framework.AssertionFailedError 40 java.io.StringBufferInputStream java.lang.String
5
Jan 2008
# projects using an API element
Jan 2008
# projects using an API element
40
35 30
junit.framework.TestSuite
time span javax.swing.JScrollPane
Jan 2009
javax.swing.border.Border
13 months
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
Jan 2009
Evaluation Results Trends 67%
33%
0%
1%
98%
1%
0%
18%
82%
Restrictions • The approach might cancel itself? No. • Unused imports remain in code? No. • Works only for Java? No.
Future Work • Find reasons behind a decline in usage. • Target the recommendations better. • Analyze more data. • Make user surveys.
How was it till now? bug-tracking systems
forums
• API quality • API usability • API compatibility • ...
documentation
emails and groups
# projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
Evaluation Results Trends 67%
33%
0%
1%
98%
1%
0%
18%
82%
22
time span
Future Work • Find reasons behind a decline in usage. • Target the recommendations better. • Analyze more data. • Make user surveys.
Jan 2009
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
Jan 2009
Yana Mileva,Valentin Dallmeier, Andres Zeller Saarland University, Germany
Mining API Popularity java.io.StringBufferInputStream
API
java.io.StringReader java.io.PrintStream ...
Mining API Popularity
popular/used
unpopular/unused
Mining API Popularity import java.util.Iterator; import java.util.List; import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger { import java.util.Iterator; import java.util.List; private boolean mungeNewParent(BcelClassWeaver weaver) import java.util.Set; import java.util.Iterator; { import java.util.List; LazyClassGen target = weaver.getLazyClassGen(); public class BcelTypeMunger extends ConcreteTypeMunger { import java.util.Set; boolean cont = true; cont = weaver) enforce_abstractMethods(weaver); private boolean public classmungeNewParent(BcelClassWeaver BcelTypeMunger extends ConcreteTypeMunger { { List methods = newParent.getWithoutIter(true); LazyClassGen target =mungeNewParent(BcelClassWeaver weaver.getLazyClassGen(); private boolean weaver) for (int i = 0; i < method.size(); i++){ boolean cont = true; { import java.util.Iterator; ResolvedMember superMethod = iter.next(); cont = enforce_abstractMethods(weaver); LazyClassGen target = weaver.getLazyClassGen(); import java.util.List; } boolean cont = true; import java.util.Set; } List methods = newParent.getWithoutIter(true); cont = enforce_abstractMethods(weaver); for (int i = 0; i < method.size(); i++){ public classsuperMethod BcelTypeMunger extends ConcreteTypeMunger { ResolvedMember = iter.next(); List methods = newParent.getWithoutIter(true); } for (int i = 0; i < method.size(); i++){ private boolean mungeNewParent(BcelClassWeaver weaver) } ResolvedMember superMethod = iter.next(); { } LazyClassGen target = weaver.getLazyClassGen(); } import java.util.Iterator; boolean cont = true; import java.util.List; cont = enforce_abstractMethods(weaver); import java.util.Iterator; import java.util.Set; import java.util.List; List methods = newParent.getWithoutIter(true); import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger for (int {i = 0; i < method.size(); i++){ superMethod = iter.next(); publicResolvedMember class BcelTypeMunger extends ConcreteTypeMunger { private boolean mungeNewParent(BcelClassWeaver weaver) } { } private boolean mungeNewParent(BcelClassWeaver weaver) LazyClassGen target = weaver.getLazyClassGen(); { boolean cont = true; LazyClassGen target = weaver.getLazyClassGen(); cont = enforce_abstractMethods(weaver); boolean cont = true; cont = enforce_abstractMethods(weaver); List methods = newParent.getWithoutIter(true); for (int i = 0; i < method.size(); i++){ List methods = newParent.getWithoutIter(true); ResolvedMember superMethod = iter.next(); for (int i = 0; i < method.size(); i++){ } ResolvedMember superMethod = iter.next(); } } }
Mining API Popularity • API quality • API usability • API compatibility • ...
How was it till now? bug-tracking systems
forums
• API quality • API usability • API compatibility • ...
documentation
emails and groups
Mining API Popularity import java.util.Iterator; import java.util.List; import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger {
import java.util.Iterator; import java.util.Iterator; import java.util.List; import java.util.List; import java.util.Set; import java.util.Set;
private boolean mungeNewParent(BcelClassWeaver weaver) { LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); public class BcelTypeMunger extends ConcreteTypeMunger {
public class BcelTypeMunger extends List methods = newParent.getWithoutIter(true); private boolean mungeNewParent(BcelClassWeaver weaver) ConcreteTypeMunger {
for (int i = 0; i < method.size(); i++){ import java.util.Iterator; ResolvedMember superMethod = iter.next(); LazyClassGen target = weaver.getLazyClassGen();
ts
{
ResolvedMember superMethod = iter.next(); { LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); import java.util.Iterator;
0
} } import java.util.Iterator; import java.util.List; import java.util.Set;
Pr oj ec
java.util.List; } private boolean import mungeNewParent boolean cont = true; import java.util.Set; } = enforce_abstractMethods(weaver); (BcelClassWeaver cont weaver) public class BcelTypeMunger extends ConcreteTypeMunger { { List methods = newParent.getWithoutIter(true); for (int i < method.size(); i++){ LazyClassGen target = i = 0; private boolean mungeNewParent(BcelClassWeaver weaver)
20
import java.util.List; List methods = newParent.getWithoutIter(true); import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger for (int {i = 0; i < method.size(); i++){ superMethod = iter.next(); publicResolvedMember class BcelTypeMunger extends ConcreteTypeMunger { private boolean mungeNewParent(BcelClassWeaver weaver) } { } private boolean mungeNewParent(BcelClassWeaver weaver) LazyClassGen target = weaver.getLazyClassGen(); { boolean cont = true; LazyClassGen target = weaver.getLazyClassGen(); cont = enforce_abstractMethods(weaver); boolean cont = true; cont = enforce_abstractMethods(weaver); List methods = newParent.getWithoutIter(true); for (int i = 0; i < method.size(); i++){ List methods = newParent.getWithoutIter(true); ResolvedMember superMethod = iter.next(); for (int i = 0; i < method.size(); i++){ } ResolvedMember superMethod = iter.next(); } } }
Jan’08
Jan’09
Mining API Popularity import java.util.Iterator; import java.util.List; import java.util.Set;
40
import java.util.Iterator; import java.util.Iterator; import java.util.List; import java.util.List; import java.util.Set; import java.util.Set;
private boolean mungeNewParent(BcelClassWeaver weaver) { LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); public class BcelTypeMunger extends ConcreteTypeMunger {
public class BcelTypeMunger extends List methods = newParent.getWithoutIter(true); private boolean mungeNewParent(BcelClassWeaver weaver) ConcreteTypeMunger {
for (int i = 0; i < method.size(); i++){ import java.util.Iterator; ResolvedMember superMethod = iter.next(); LazyClassGen target = weaver.getLazyClassGen(); import java.util.List; } mungeNewParent boolean cont = true; import java.util.Set; } cont = enforce_abstractMethods(weaver);
ts
{
{
ResolvedMember superMethod = iter.next();
LazyClassGen target = weaver.getLazyClassGen(); boolean cont = true; cont = enforce_abstractMethods(weaver); import java.util.Iterator;
0
} } import java.util.Iterator; import java.util.List; import java.util.Set;
Pr oj ec
private boolean (BcelClassWeaver weaver) public class BcelTypeMunger extends ConcreteTypeMunger { { List methods = newParent.getWithoutIter(true); for (int i < method.size(); i++){ LazyClassGen target = i = 0; private boolean mungeNewParent(BcelClassWeaver weaver)
20
import java.util.List; List methods = newParent.getWithoutIter(true); import java.util.Set; public class BcelTypeMunger extends ConcreteTypeMunger for (int {i = 0; i < method.size(); i++){ ResolvedMember superMethod = iter.next(); public class BcelTypeMunger extends ConcreteTypeMunger { private boolean mungeNewParent(BcelClassWeaver weaver) } { } private boolean mungeNewParent(BcelClassWeaver weaver) LazyClassGen target = weaver.getLazyClassGen(); { boolean cont = true; LazyClassGen target = weaver.getLazyClassGen(); cont = enforce_abstractMethods(weaver); boolean cont = true; cont = enforce_abstractMethods(weaver); List methods = newParent.getWithoutIter(true); for (int i = 0; i < method.size(); i++){ List methods = newParent.getWithoutIter(true); ResolvedMember superMethod = iter.next(); for (int i = 0; i < method.size(); i++){ } ResolvedMember superMethod = iter.next(); } } }
Jan’08
Jan’09
# projects using an API element
public class BcelTypeMunger extends ConcreteTypeMunger {
35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
usage trends
Jan 2009
Who would benefit? # projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
API users
time span
Jan 2009
API producers
API users always want to use the best product want free of defects software don’t want to waste time
API producers want to produce good product want feedback from the users
Examples junit.framework.AssertionFailerError compatibility problems
# projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25
java.io.StringBufferInputStream code defect
20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
Jan 2009
java.lang.String - code smell
Hypothesis The past usage trend of an API element is predictive of the future usage trend of the same element.
Evaluation Scenario junit.framework.AssertionFailerError 35 30
Oct 2008
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25
Jan 2009
8 months
20 15 10
junit.framework.AssertionFailedError 40 java.io.StringBufferInputStream java.lang.String
5
Jan 2008
# projects using an API element
Jan 2008
# projects using an API element
40
35 30
junit.framework.TestSuite
time span javax.swing.JScrollPane
Jan 2009
javax.swing.border.Border
13 months
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
time span
Jan 2009
Evaluation Results Trends 67%
33%
0%
1%
98%
1%
0%
18%
82%
Restrictions • The approach might cancel itself? No. • Unused imports remain in code? No. • Works only for Java? No.
Future Work • Find reasons behind a decline in usage. • Target the recommendations better. • Analyze more data. • Make user surveys.
How was it till now? bug-tracking systems
forums
• API quality • API usability • API compatibility • ...
documentation
emails and groups
# projects using an API element
40 35 30
junit.framework.TestSuite javax.swing.JScrollPane javax.swing.border.Border
25 20 15 10
junit.framework.AssertionFailedError java.io.StringBufferInputStream java.lang.String
5
Jan 2008
Evaluation Results Trends 67%
33%
0%
1%
98%
1%
0%
18%
82%
22
time span
Future Work • Find reasons behind a decline in usage. • Target the recommendations better. • Analyze more data. • Make user surveys.
Jan 2009
