}

    @Override
    public Object get(String groupId, String artifactId, String version, String tag) {
        return cache.get(session, new Key(groupId, artifactId, version, tag));
    }

    @Override
    public void put(String groupId, String artifactId, String version, String tag, Object data) {
        cache.put(session, new Key(groupId, artifactId, version, tag), data);
    }

    static class Key {

  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example.group</groupId>
  <artifactId>testinvalidpom</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>the.group.id</groupId>
          <artifactId>the.artifact</artifactId>
          <version/>
        </plugin>
      </plugins>

-->

<project>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>aid</artifactId>
  <groupId>gid</groupId>
  <version>0.1</version>

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-it-plugin</artifactId>
        <version>1.0</version>
        <dependencies>
          <dependency>
            <groupId>test</groupId>
            <artifactId>a</artifactId>
            <version>0.1</version>

            return null;
        }

        // GroupId and version can be inherited, but if still null, we can't create a valid Artifact
        if (groupId == null || groupId.isEmpty() || version == null || version.isEmpty()) {
            context.debug("Cannot determine complete GAV for artifactId: " + artifactId);
            return null;
        }

        return Coordinates.of(groupId, artifactId, version);
    }

    /**

            String pomContent = Files.readString(pomFile);
            assertTrue(
                    pomContent.contains("<groupId>com.example</groupId>"),
                    "Expected " + pomContent + " to contain " + "<groupId>com.example</groupId>");
            // Note: The exact modifications depend on which strategies are applicable
            // This test mainly verifies that apply goal can modify files

-->

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>gid</groupId>
  <artifactId>aid</artifactId>
  <version>0.1</version>

    <dependencies>
      <dependency>
        <groupId>test</groupId>
        <artifactId>a</artifactId>
        <version>LATEST</version>
      </dependency>
      <dependency>
        <groupId>test</groupId>
        <artifactId>b</artifactId>
        <version>RELEASE</version>

    /**
     * Gets the effective group identifier of the model.
     *
     * @return The effective group identifier of the model or an empty string if unknown, never {@code null}.
     */
    public String getGroupId() {
        return (groupId != null) ? groupId : "";
    }

    /**
     * Sets the effective group identifier of the model.
     *

KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<project>
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.apache.maven.its</groupId>
  <artifactId>b</artifactId>
  <version>0.1</version>
  <packaging>jar</packaging>

  <name>Maven Integration Test :: Dummy Artifact</name>
  <description>

  </description>

     */
    static String toId(String groupId, String artifactId, String version) {
        StringBuilder buffer = new StringBuilder(128);

        buffer.append((groupId != null && !groupId.isEmpty()) ? groupId : "[unknown-group-id]");
        buffer.append(':');
        buffer.append((artifactId != null && !artifactId.isEmpty()) ? artifactId : "[unknown-artifact-id]");

<project>
  <parent>
    <artifactId>p2</artifactId>
    <groupId>maven.t01</groupId>
    <version>1.0</version>
  </parent>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven.t01</groupId>
  <artifactId>p3</artifactId>
  <packaging>pom</packaging>
  <name>p3</name>
  <version>1.0</version>
  <organization>
    <name>p3-org</name>
  </organization>