disallow twice write to the same 'samples' component (toml)

Author: B0SKAMP

api/src/main/java/org/fairdatapipeline/api/Object_component_write.java

@@ -94,11 +94,15 @@ public void writeDistribution(Distribution distribution) {
    * @param samples a Samples object containing the samples
    */
   public void writeSamples(Samples samples) {
+    if(this.been_used) {
+      throw(new RuntimeException("obj component already written"));
+    }
     try (CleanableFileChannel fileChannel = this.getFileChannel()) {
       this.dp.coderun.parameterDataWriter.write(fileChannel, this.component_name, samples);
     } catch (IOException e) {
       throw (new RuntimeException("writeSamples() -- IOException trying to write to file.", e));
     }
+    this.been_used = true;
   }
 
   void register_me_in_code_run() {

api/src/test/java/org/fairdatapipeline/api/CoderunIntegrationTest.java

@@ -2,6 +2,8 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -407,6 +409,19 @@ void testReadCategoricalDistribution() {
     check_last_coderun(List.of(new Triplet<>(dataProduct, component, hash)), null);
   }
 
+  @Test
+  @Order(7)
+  void testWriteSamplesFail() throws RuntimeException {
+    String dataProduct = "human/samples2";
+    String component = "example-samples-w";
+    try (var coderun = new Coderun(configPath, scriptPath, token)) {
+      Data_product_write dp = coderun.get_dp_for_write(dataProduct, "toml");
+      Object_component_write oc = dp.getComponent(component);
+      oc.writeSamples(samples2);
+      assertThrows(RuntimeException.class, () -> oc.writeSamples(samples3));
+    }
+  }
+
   @Test
   @Order(7)
   void testWriteSamples() {

api/src/test/resources/config-stdapi.yaml

@@ -66,6 +66,10 @@ write:
     description: Coderun Integration test for samples
     use:
       version: 0.0.1
+  - data_product: human/samples2
+    description: Coderun Integration test for samples
+    use:
+      version: 0.0.1
   - data_product: human/multicomp
     description: Coderun Integration test for samples multiple components
     use: