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JcReport
Tools like PMD, Checkstyle, FindBugs, and JaCoCo deliver high-quality code-analysis features. The jCoderZ report (JcReport) tool reads the XML output of the code-analysis tools and creates a single report which combines all findings in one file. The final HTML report renders the source file as HTML pages and shows the findings directly in the lines, reported by the tools. The coverage information is displayed in a column at the left of the HTML page.
The Ant task for the JcReport looks quite complex, but the structure is straight-forward and will hopefully become clear with the help of this introduction. As a sample you might check out the target in the [source:trunk/config/build-report.xml build-report.xml] of the fawkeZ project.
The output of the JcReport tool is a file called {{{jcoderz-report.xml}}}, a file called {{{summary.xml}}}, and a set of HTML files which contain the browsable version of the JcReport XML files.
<jcreport name="fawkez"
dest="${base.dir}/build/doc/findings-report"
wikibase="https://www.jcoderz.org/wiki/"
webrcsbase="https://www.jcoderz.org/fawkez/browser/trunk"
webrcssuffix=""
packagebase="org.jcoderz"
projectbase="${base.dir}"
tempfolder="${base.dir}/build/jcreport"
maxheap="128"
debug="false">
<classpath refid="jcreport.classpath"/>
<!-- Reports Section -->
<reports>
<report name="fawkez-test"
level="test"
sourcepath="${base.dir}/test/java"
classpath="${build.dir}/classes"/>
<report name="fawkez-prod"
level="prod"
sourcepath="${base.dir}/src/java"
classpath="${build.dir}/classes"/>
</reports>
<!-- Tools Section -->
<tools>
<pmd config="${pmd.rules}"
targetjdk="1.4"
encoding="Cp1252">
<classpath refid="pmd.classpath"/>
</pmd>
<cpd minimumtokens="100">
<classpath refid="pmd.classpath"/>
</cpd>
<findbugs config="${findbugs.rules}"
maxheap="512"
effort="max"
debug="false"
warninglevel="low">
<classpath refid="findbugs.classpath"/>
<auxclasspath refid="findbugs.aux.classpath"/>
<pluginlist refid="findbugs.plugins"/>
</findbugs>
<checkstyle config="${checkstyle.rules}"
maxheap="512">
<classpath refid="checkstyle.classpath" />
</checkstyle>
<cobertura datafile="junit.ser"/>
<classpath refid="cobertura.classpath" />
</cobertura>
</tools>
<!-- Filters Section -->
<filters>
<filter file="${filter.rules}"/>
</filters>
</jcreport>
The tag {{{jcreport}}} tag has the following attributes:
- {{{name}}}: The name of the report ("fawkez").
- {{{dest}}}: The folder where the report is stored ("${base.dir}/build/doc/findings-report").
- {{{wikibase}}}: The project's Wiki URL ("http://www.jcoderz.org/fawkez/wiki/").
- {{{webrcsbase}}}: The base URL of the !WebRcs view ("http://www.jcoderz.org/fawkez/browser/trunk").
- {{{webrcssuffix}}}: The suffix to append to the !WebRcs URLs (E.g. "?root=project").
- {{{packagebase}}}: The package prefix of the project ("org.jcoderz").
- {{{projectbase}}}: The project's base directory ("${base.dir}").
- {{{tempfolder}}}: A temporary folder ("${base.dir}/build/jcreport").
- {{{maxheap}}}: The heap size in MB ("128").
- {{{debug}}}: A debug mode flag ("false").
- {{{oldReportFile}}}: Point this to the {{{jcoderz-report.xml}}} of the last build to get historic findings list.
- {{{cpus}}}: The report will be executed in parallel using 'cpus' + 1 thread if possible.
The {{{jcreport}}} tag has the following child tags:
- {{{reports}}}
- {{{tools}}}
- {{{filters}}}
The {{{reports}}} tag can contain multiple {{{report}}} child tags. Each {{{report}}} tag defines a set of files that are checked by the code-analysis tool-chain. The files can be separated by {{{level}}}, which marks findings in the XML report {{{jcoderz-report.xml}}} with a {{{level}}} attribute. This attribute can later be used for filtering findings from test code for example.
<report name="fawkez-prod"
level="prod"
sourcepath="${base.dir}/src/java"
classpath="${build.dir}/classes"/>
The tag {{{name}}} is the name of the file collection, {{{level}}} is the name of the level (see [http://www.jcoderz.org/cc/fawkez/latest/api/org/jcoderz/phoenix/report/ReportLevel.html ReportLevel] for the possible values), {{{sourcepath}}} is the path to the source files of this collection, and {{{classpath}}} is the classpath that contain the classes for this file collection.
The {{{tools}}} tag has the following child tags:
- {{{pmd}}}
- {{{cpd}}}
- {{{findbugs}}}
- {{{checkstyle}}}
- {{{cobertura}}}
- {{{emma}}}
All tools have the attribute {{{maxheap}}} in common. The tools are forked by the JcReport because the tools have different requirements in terms of heap size. Therefore it is possible to set the maximum heap size of all tools independently.
All tools have a child tag {{{classpath}}} in common which defines the classpath for the single tool. Because the tools are forked by the JcReport in the background the classpath must be the same as when launching the tools separately.
Some tools have a {{{debug}}} attribute to turn on debug information. The output is dependent on what the tool provides in terms of debugging information.
The attributes of the {{{pmd}}} tag are defined by the [http://pmd.sourceforge.net/running.html PMD command line tool]:
<pmd config="${pmd.rules}"
targetjdk="1.4"
encoding="Cp1252">
<classpath refid="pmd.classpath"/>
</pmd>
The {{{config}}} attribute defines the [wiki:PMD] configuration file. The {{{targetjdk}}} defines the JDK version of the source files, and the {{{encoding}}} attribute defines the source file encoding.
The Copy Paste Detector (CPD) is part of the [wiki:PMD] project and can be used to detect '''copied & pasted''' code. The attributes of the {{{cpd}}} tag are defined by the [http://pmd.sourceforge.net/cpd.html CPD command line tool]:
The tag {{{minimumtokens}}} defines the minimum number of tokens in an analyzed code sequence when the code blocks are considered to be copied.
The attributes of the {{{findbugs}}} tag are defined by the [http://findbugs.sourceforge.net/manual/installing.html#commandLineOptions FindBugs command line tool]:
<findbugs config="${findbugs.rules}"
maxheap="512"
effort="max"
debug="false"
warninglevel="low">
<classpath refid="findbugs.classpath"/>
<auxclasspath refid="findbugs.aux.classpath"/>
<pluginlist refid="findbugs.plugins"/>
</findbugs>
The {{{config}}} attribute points to the place where the FindBugs config file can be found. The FindBugs config file is different from the rest of the config files as it contains an exclude list. In FindBugs all checkers that FindBugs supports are turned on per default. This file allows to turn off rules so that FindBugs does not try to detect code that violates these rules. The {{{effort}}} tag defines how hard FindBugs tries to find problems in the code. The {{{warninglevel}}} attribute declares which bug priorities FindBugs reports. The {{{warninglevel}}} is related to the command line switches {{{-low}}}, {{{-medium}}}, and {{{-high}}}.
The attributes of the {{{checkstyle}}} tag are defined by the [http://checkstyle.sourceforge.net/cmdline.html Checkstyle command line tool]:
The {{{config}}} attribute defines the [wiki:Checkstyle] configuration file.
The attributes of the {{{cobertura}}} tag are defined by the [http://cobertura.sourceforge.net/commandlinereference.html Cobertura command line tool]:
<cobertura datafile="junit.ser"/>
<classpath refid="cobertura.classpath" />
</cobertura>
The {{{cobertura}}} tag has only one attribute, which defines the {{{datafile}}} into which the coverage information has been written into.
Please note that only one of {{{cobertura}}} or {{{emma}}} can be set. To include the result of an {{{emma}}} analysis the following line should be added as tool:
<emma datafile="${build.dir}/full-coverage.es"/>
{{{Emma}}} reports the coverage different than {{{cobertura}}}. Emma does not count the number of times a line is was touched, it checks if a branch/block of code was executed or not. Since one line of java code can hold several branches but the precision we use for the report is one line, we percent the coverage as percentage of line coverage. So if a line holds two branches but only one was covered a {{{50}}} is displayed representing 50%. If a line was covered in all its potential branches a {{{100}}} is displayed. Check out the [http://emma.sourceforge.net/faq.html#q.fractional emma web site] for more details on this.
For {{{emma}} we do not use the emma xml as input, because it does not contain the detail of information needed. Use the (probably merged) binary {{{*.es}}} file that should contain all data.
The {{{filters}}} tag can contain an arbitrary set of {{{filter}}} tags that define a list of XSL filter files to filter out findings from the JcReport XML file.
<filter file="${filter.rules}"/>
The filter step runs on the {{{jcoderz-report.xml}}} file prior to HTML rendering.
The ruleset files in fawkeZ are declared like this:
As mentioned above the classpath settings for the different tools need to be the same as when running the tools from the command line. Here is an example of the classpath settings as it is defined for the jcoderz.org JcReport:
<path id="jcreport.classpath">
<pathelement path="${base.dir}/build/classes"/>
<fileset dir="${base.dir}/lib">
<include name="default/jaxb/*.jar"/>
<include name="default/chart2d/*.jar"/>
</fileset>
</path>
<!-- This classpath is used by the checkstyle process -->
<path id="checkstyle.classpath">
<fileset dir="${base.dir}/lib">
<include name="default/antlr/*.jar"/>
<include name="default/checkstyle/*.jar"/>
<include name="default/commons-beanutils/*.jar"/>
<include name="default/commons-cli/*.jar"/>
<include name="default/commons-logging/*.jar"/>
</fileset>
</path>
<!-- This classpath is used by the pmd and cpd process -->
<path id="pmd.classpath">
<fileset dir="${base.dir}/lib">
<include name="default/pmd/*.jar"/>
<include name="default/jaxen/*.jar"/>
<include name="default/oro/*.jar"/>
</fileset>
</path>
<!-- This classpath is used by the findbugs process -->
<path id="findbugs.classpath">
<fileset dir="${base.dir}/lib">
<include name="default/findbugs/*.jar"/>
<include name="default/dom4j/*.jar"/>
<include name="default/jaxen/*.jar"/>
<exclude name="**/coreplugin.jar"/>
</fileset>
</path>
<!-- This classpath defines the findbugs plugins -->
<path id="findbugs.plugins">
<path location="${base.dir}/lib/default/findbugs/coreplugin.jar"/>
</path>
<!-- This is the auxiliary classpath used by findbugs -->
<path id="findbugs.aux.classpath">
<path location="${base.dir}/build/classes"/>
<fileset dir="${base.dir}/lib">
<include name="default/chart2d/*.jar"/>
<include name="default/jaxb/*.jar"/>
<include name="default/commons-httpclient/*.jar"/>
<include name="default/commons-cli/*.jar"/>
<include name="default/commons-pool/*.jar"/>
<include name="default/checkstyle/*.jar"/>
<include name="default/fop/*.jar"/>
<include name="default/jtidy/*.jar"/>
<include name="default/batik-1.5-fop/*.jar"/>
<include name="default/velocity/*.jar"/>
<include name="default/jivesoftware/*.jar"/>
<include name="default/geronimo-spec/*.jar"/>
<include name="default/cobertura/*.jar"/>
<include name="default/ant/*.jar"/>
<include name="default/antlr/*.jar"/>
<include name="default/xercesImpl/*.jar"/>
<include name="default/xalan/*.jar"/>
<include name="eclipse/*.jar"/>
</fileset>
</path>
This is the Ant taskdef definition for the jcoderz.org JcReport: