Maven - use -source 5 or higher to enable... while building the project

Question

I downloaded one project from our svn and now I am trying to build this using Maven (mvn clean install... my maven is Apache Maven 3.0.4). Unfortunately, when I try to build, the following error occurs. It is strange that it reports something (I think) about Java version 1.3, which of course I dont have installed in my laptop. I have JAVA_HOME setted to JDK 1.7, my javac is also in version 1.7 ...

Please do you know where is the problem?

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project irapi: Compilation failure: Compilation failure:
[ERROR] /home/jan/nutch/src/plugin/irapi/src/main/java/cz/cvut/fit/linkedtv/irapi/rest/MediaServer.java:[21,1] error: **annotations are not supported in -source 1.3**
[ERROR] 
[ERROR] (use -source 5 or higher to enable annotations)
[ERROR] /home/jan/nutch/src/plugin/irapi/src/main/java/cz/cvut/fit/linkedtv/irapi/solr/SolrQueryResponseConvertor.java:[35,26] error: **for-each loops are not supported in -source 1.3**

Answer 1

You must specify the source configuration parameter to the maven-compiler-plugin like this:

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
      <source>1.5</source>
    </configuration>
  </plugin>

See also Setting the -source and -target of the Java Compiler in the maven documentation for further details.