String existingContent = "";

        // Try to read existing content
        try {
            FileObject inputFile = processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, "", path);
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputFile.openInputStream()))) {
                String line;

    public URI getLocationURI() {
        return getFile().toURI();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

        if (!(obj instanceof FileModelSource)) {
            return false;
        }
        FileModelSource other = (FileModelSource) obj;
        return getFile().equals(other.getFile());
    }

    @Override

    @Override
    public void artifactInstalling(RepositoryEvent event) {
        logger.info("Installing {} to {}", event.getArtifact().getFile(), event.getFile());
    }

    @Override
    public void metadataInstalling(RepositoryEvent event) {
        logger.debug("Installing {} to {}", event.getMetadata(), event.getFile());
    }

    @Override
    public void metadataResolved(RepositoryEvent event) {

    public void artifactInstalled(RepositoryEvent event) {
        println("artifactInstalled", event.getArtifact() + " to " + event.getFile());
    }

    @Override
    public void artifactInstalling(RepositoryEvent event) {
        println("artifactInstalling", event.getArtifact() + " to " + event.getFile());
    }

    @Override
    public void artifactResolved(RepositoryEvent event) {

        assertEquals(
                p.getActivation().getFile().getExists(),
                clone.getActivation().getFile().getExists());
        assertEquals(
                p.getActivation().getFile().getMissing(),
                clone.getActivation().getFile().getMissing());
        assertEquals(
                p.getActivation().getProperty().getName(),

      assertTrue(ByteSource.wrap(data).slice(0, chunk1).contentEquals(source));
    }
    File file = out.getFile();
    assertThat(file).isNull();

    // Write data to go over the threshold
    if (chunk2 > 0) {
      write(out, data, chunk1, chunk2, singleByte);
      file = out.getFile();
      assertEquals(dataSize, file.length());
      assertTrue(file.exists());

      assertTrue(ByteSource.wrap(data).slice(0, chunk1).contentEquals(source));
    }
    File file = out.getFile();
    assertThat(file).isNull();

    // Write data to go over the threshold
    if (chunk2 > 0) {
      write(out, data, chunk1, chunk2, singleByte);
      file = out.getFile();
      assertEquals(dataSize, file.length());
      assertTrue(file.exists());

        assertTrue(result.isResolved(), "Expected " + result + ".isResolved() to return true");
        Artifact artifact = result.getArtifact();
        assertNotNull(artifact.getFile());
        assertEquals(filename, artifact.getFile().getName());
    }

    @Test
    void testResolveArtifacts() throws Exception {
        ArtifactRequest req1 = new ArtifactRequest();

                .get(1)
                .getActivation()
                .getFile()
                .getExists();

        assertEquals(originalExists, resultExists);
        assertTrue(result.getEffectiveModel()
                .getProfiles()
                .get(1)
                .getActivation()
                .getFile()
                .getExists()
                .contains(BASE_DIR));
    }

        Artifact localRepositoryArtifact = mock(Artifact.class);
        when(localRepositoryArtifact.getFile()).thenReturn(new File(baseDir, "some/path/within"));

        Artifact nonLocalReposioryArtifact = mock(Artifact.class);
        when(nonLocalReposioryArtifact.getFile()).thenReturn(new File("something/completely/different"));