ScriptHeaderService: move default method impls to iface

Author: ctrueden

src/main/java/org/scijava/script/DefaultScriptHeaderService.java

@@ -45,32 +45,5 @@ public class DefaultScriptHeaderService extends
 	AbstractHandlerService<ScriptLanguage, ScriptHeader> implements
 	ScriptHeaderService
 {
-
-	// -- ScriptHeaderService methods --
-
-	@Override
-	public String getHeader(final ScriptLanguage language) {
-		StringBuilder header = new StringBuilder();
-		for (final ScriptHeader scriptHeader : getInstances()) {
-			if (scriptHeader.supports(language)) {
-				header.append(scriptHeader.getHeader());
-				header.append("\n");
-			}
-		}
-
-		return header.toString();
-	}
-
-	// -- HandlerService methods --
-
-	@Override
-	public Class<ScriptHeader> getPluginType() {
-		return ScriptHeader.class;
-	}
-
-	@Override
-	public Class<ScriptLanguage> getType() {
-		return ScriptLanguage.class;
-	}
-
+	// NB: No implementation needed.
 }

src/main/java/org/scijava/script/ScriptHeaderService.java

@@ -58,5 +58,27 @@ public interface ScriptHeaderService extends
 	 * @param language - Language to look up
 	 * @return The combined header text to insert at the top of a script.
 	 */
-	String getHeader(final ScriptLanguage language);
+	default String getHeader(final ScriptLanguage language) {
+		StringBuilder header = new StringBuilder();
+		for (final ScriptHeader scriptHeader : getInstances()) {
+			if (scriptHeader.supports(language)) {
+				header.append(scriptHeader.getHeader());
+				header.append("\n");
+			}
+		}
+
+		return header.toString();
+	}
+
+	// -- HandlerService methods --
+
+	@Override
+	default Class<ScriptHeader> getPluginType() {
+		return ScriptHeader.class;
+	}
+
+	@Override
+	default Class<ScriptLanguage> getType() {
+		return ScriptLanguage.class;
+	}
 }