doc field can also be a list of strings

Author: mr-c

src/main/java/org/commonwl/view/cwl/CWLService.java

@@ -957,6 +957,14 @@ private String stepIDFromSource(String source) {
 	private String extractDoc(Map<String, Object> cwlFile) {
 		if (cwlFile != null) {
 			if (cwlFile.containsKey(DOC)) {
+				Object doc = cwlFile.get(DOC);
+				if (doc.getClass().isAssignableFrom(String.class)) {
+					return (String) doc;
+				}
+				if (doc instanceof List<?>) {
+					List<String> docList = (List<String>) doc;
+					return String.join("", docList);
+				}
 				return (String) cwlFile.get(DOC);
 			} else if (cwlFile.containsKey(DESCRIPTION)) {
 				// This is to support older standards of cwl which use description instead of

src/test/java/org/commonwl/view/cwl/CWLServiceTest.java

@@ -263,6 +263,23 @@ public void getHelloWorkflowOverview() throws Exception {
 
 	}
 
+	/**
+	 * Test retrieval of a workflow overview with an array ``doc`` field
+	 */
+	@Test
+	public void getHelloWorkflowOverviewDocList() throws Exception {
+
+		// Test cwl service
+		CWLService cwlService = new CWLService(Mockito.mock(RDFService.class), Mockito.mock(CWLTool.class), 5242880);
+
+		// Run workflow overview
+		File helloWorkflow = new File("src/test/resources/cwl/hello/hello_doclist.cwl");
+		WorkflowOverview hello = cwlService.getWorkflowOverview(helloWorkflow);
+		assertNotNull(hello);
+		assertEquals("Puts a message into a file using echo. Even more doc", hello.getDoc());
+
+	}
+
 	/**
 	 * Test IOException is thrown when files are over limit with getWorkflowOverview
 	 */

src/test/resources/cwl/hello/hello_doclist.cwl

@@ -0,0 +1,37 @@
+#!/usr/bin/env cwl-runner
+
+cwlVersion: v1.0
+$graph:
+- id: echocmd
+  class: CommandLineTool
+  inputs:
+    echo-in:
+      type: string
+      label: "Message"
+      doc: "The message to print"
+      default: "Hello World"
+      inputBinding: {}
+  outputs:
+    echo-out:
+      type: stdout
+      label: "Printed Message"
+      doc: "The file containing the message"
+  baseCommand: echo
+  stdout: messageout.txt
+
+- id: main
+  class: Workflow
+  label: "Hello World"
+  doc:
+    - "Puts a message into a file using echo. "
+    - "Even more doc"
+  inputs: []
+  outputs:
+    output:
+      type: File
+      outputSource: step0/echo-out
+  steps:
+    step0:
+      run: "#echocmd"
+      in: []
+      out: [echo-out]