Duplicates Finder (Java)

Project file type

To be able to run IntelliJ IDEA duplicates finder engine, TeamCity requires either IntelliJ IDEA project file\directory, or Maven pom.xml to be specified here.

Path to the project

Depending on the type of project selected in the Project file type, specify here:

• For IntelliJ IDEA project: the path to the project file (.ipr) or the path to the project directory (the root directory of the project containing the .idea folder).

• For Maven project: path to the pom.xml file. This information is required by this build runner to understand the structure of the project.

Detect global libraries and module-based JDK in the *.iml files

This option is available if you use an IntelliJ IDEA project. In IntelliJ IDEA, the module settings are stored in *.iml files, thus, if this option is checked, all the module files will be automatically scanned for references to the global libraries and module JDKs when saved. This helps ensure that all references will be properly resolved.

Check/Reparse Project

This option is available if you use an IntelliJ IDEA project. Click this button to reparse your IntelliJ IDEA project and import the build settings right from the project, for example the list of JDKs.

Working directory

Enter a path to a build working directory if it differs from the build checkout directory. Optional, specify if differs from the checkout directory.

<path_variable_name>

This field appears if the project file contains path macros, defined in the Path Variables dialog of IntelliJ IDEA's Settings dialog. In Set value to field, specify a path to the project resources to be used on different build agents.

JDK Home

Use this field to specify the JDK home for the project.

JDK Jar File Patterns

Click this link to open a text area where you can define templates for the jar files of the project JDK. Use Ant rules to define the jar file patterns. The default value is used for Linux and Windows operating systems:

jre/lib/*.jar

For Mac OS X, use the following lines:

lib/*.jar ../Classes/*.jar

IDEA Home

If your project uses the IDEA JDK, specify the location of the IDEA home directory

IDEA Jar Files Patterns

Click this link to open a text area, where you can define templates for the jar files of the IDEA JDK.

JDK home path

Use this field to specify the path to your custom JDK which should be used to run the build. If the field is left blank, the path to JDK Home is read either from the JAVA_HOME environment variable on agent computer, or from env.JAVA_HOME property specified in the build agent configuration file (buildAgent.properties). If neither of these values is specified, TeamCity uses the Java home of the build agent process itself.

JVM command line parameters

Specify the desired Java Virtual Machine parameters, such as maximum heap size or parameters that enable remote debugging. These settings are passed to the JVM used to run your build. Example:

-Xmx512m -Xms256m

Test sources

If this option is checked, the test sources will be included in the duplicates analysis.

Distinguish variables

If this option is checked, the similar contents with different variable names will be recognized as different. If this option is not checked, such contents will be recognized as duplicated:

public static void main(String[] args) { int i = 0; int j = 0; if (i == j) { System.out.println("sum of " + i + " and " + j + " = " + i + j); } long k = 0; long n = 0; if (k == n) { System.out.println("sum of " + k + " and " + n + " = " + k + n); } }

Distinguish fields

If this option is checked, the similar contents with different field names will be recognized as different. If this option is not checked, such contents will be recognized as duplicated:

myTable.addSelectionListener(new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } /*.....**/ }); myTree.addSelectionListener(new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } /*.....**/ });

Distinguish methods

If this option is checked, the methods of similar structure will be recognized as different. If this option is not checked, such methods will be recognized as duplicated. In this case, they can be extracted and reused. Initial version:

public void buildCanceled(Build build, SessionData data) { /* ... **/ for (IListener listener : getListeners()) { listener.buildCanceled(build, data); } } public void buildFinished(Build build, SessionData data) { /* ... **/ for (IListener listener : getListeners()) { listener.buildFinished(build, data); } }

After analysiing code for duplicates without distinguishing methods, the duplicated fragments can be extracted:

public void buildCanceled(final Build build, final SessionData data) { enumerateListeners(new Processor() { public void process(final IListener listener) { listener.buildCanceled(build, data); } }); } public void buildFinished(final Build build, final SessionData data) { enumerateListeners(new Processor() { public void process(final IListener listener) { listener.buildFinished(build, data); } }); } private void enumerateListeners(Processor processor) {/* ... **/ for (IListener listener : getListeners()) { processor.process(listener); } } private interface Processor { void process(IListener listener); }

Distinguish types

If this option is checked, the similar code fragments with different type names will be recognized as different. If this option is not checked, such code fragments will be recognized as duplicates.

new MyIDE().updateStatus() new TheirIDE().updateStatus()

Distinguish literals

If this option is checked, similar line of code with different litarels will be considered different If this option is not checked, such lines will be recognized as duplicates.

myWatchedLabel.setToolTipText("Not Logged In"); myWatchedLabel.setToolTipText("Logging In...");

Ignore duplicates with complexity lower than

Complexity of the source code is defined by the amount of statements, expressions, declarations and method calls. Complexity of each of them is defined by its cost. Summarized costs of all these elements of the source code fragment yields the total complexity. Use this field to specify the lowest level of complexity of the source code to be taken into consideration when detecting duplicates. For meaningful results start with value 10.

Ignore duplicate subexpressions with complexity lower than

Use this field to specify the lowest level of complexity of subexpressions to be taken into consideration when detecting duplicates.

Check if Subexpression Can be Extracted

If this option is checked, the duplicated subexpressions can be extracted.