two compiles from the same source

[deckrider+mvn]

I have a requirement to build two different jars (one for java 1.4 and
one for java 1.5) from the same source.  Is this the best way to make
such a project or are there better aproaches?

Layout:

foo-parent/pom.xml
foo-parent/foo14
foo-parent/foo14/pom.xml
foo-parent/foo15
foo-parent/foo15/pom.xml
foo-parent/src
foo-parent/src/main
foo-parent/src/main/java
foo-parent/src/main/java/com
foo-parent/src/main/java/com/example
foo-parent/src/main/java/com/example/Test.java

foo-parent/pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd";>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example</groupId>
  <packaging>pom</packaging>
  <artifactId>foo-parent</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <name>Foo Parent</name>
  <url>http://impact.vzbi.com</url>
  <modules>
    <module>foo15</module>
    <module>foo14</module>
  </modules>
</project>

foo-parent/foo14/pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd";>
  <modelVersion>4.0.0</modelVersion>
  <parent>
     <groupId>com.example</groupId>
     <artifactId>foo-parent</artifactId>
     <version>1.0.0-SNAPSHOT</version>
  </parent>
  <groupId>com.example</groupId>
  <name>Foo 1.4</name>
  <artifactId>foo14</artifactId>
  <packaging>jar</packaging>
  <build>
    <sourceDirectory>../src</sourceDirectory>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.4</source>
          <target>1.4</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

foo-parent/foo15/pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd";>
  <modelVersion>4.0.0</modelVersion>
  <parent>
     <groupId>com.example</groupId>
     <artifactId>foo-parent</artifactId>
     <version>1.0.0-SNAPSHOT</version>
  </parent>
  <groupId>com.example</groupId>
  <name>Foo 1.5</name>
  <artifactId>foo15</artifactId>
  <packaging>jar</packaging>
  <build>
    <sourceDirectory>../src</sourceDirectory>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.5</source>
          <target>1.5</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

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