event listener index elements can now create corresponding document symbols

Author: martinlippert

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/java/events/EventListenerIndexElement.java

@@ -10,14 +10,17 @@
  *******************************************************************************/
 package org.springframework.ide.vscode.boot.java.events;
 
+import org.eclipse.lsp4j.DocumentSymbol;
 import org.eclipse.lsp4j.Location;
+import org.eclipse.lsp4j.SymbolKind;
 import org.springframework.ide.vscode.commons.protocol.spring.AbstractSpringIndexElement;
 import org.springframework.ide.vscode.commons.protocol.spring.AnnotationMetadata;
+import org.springframework.ide.vscode.commons.protocol.spring.SymbolElement;
 
 /**
  * @author Martin Lippert
  */
-public class EventListenerIndexElement extends AbstractSpringIndexElement {
+public class EventListenerIndexElement extends AbstractSpringIndexElement implements SymbolElement {
 
 	private final String eventType;
 	private final Location location;
@@ -47,4 +50,25 @@ public String getContainerBeanType() {
 		return containerBeanType;
 	}
 
+	@Override
+	public DocumentSymbol getDocumentSymbol() {
+		DocumentSymbol symbol = new DocumentSymbol();
+		symbol.setName("listens on: " + getSimpleType(eventType));
+		symbol.setKind(SymbolKind.Event);
+		symbol.setRange(location.getRange());
+		symbol.setSelectionRange(location.getRange());
+		
+		return symbol;
+	}
+	
+	private String getSimpleType(String fullyQualifiedType) {
+		int index = fullyQualifiedType.lastIndexOf('.');
+		if (index > 0 && index < fullyQualifiedType.length()) {
+			return fullyQualifiedType.substring(index + 1);
+		}
+		else {
+			return fullyQualifiedType;
+		}
+	}
+
 }

headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/java/events/test/SpringIndexerEventsTest.java

@@ -23,9 +23,11 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.TimeUnit;
 
+import org.eclipse.lsp4j.DocumentSymbol;
 import org.eclipse.lsp4j.Location;
 import org.eclipse.lsp4j.Position;
 import org.eclipse.lsp4j.Range;
+import org.eclipse.lsp4j.SymbolKind;
 import org.eclipse.lsp4j.TextDocumentIdentifier;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -125,6 +127,10 @@ void testAnnotationBasedEventListenerIndexElements() throws Exception {
         assertNotNull(location);
         assertEquals(docUri, location.getUri());
         assertEquals(new Range(new Position(10, 13), new Position(10, 24)), location.getRange());
+        
+        DocumentSymbol symbol = listenerElement.getDocumentSymbol();
+        assertEquals("listens on: ApplicationEvent", symbol.getName());
+        assertEquals(SymbolKind.Event, symbol.getKind());
     }
 
     @Test