Eliminate SonarQube warnings

generator/src/main/java/io/wcm/devops/conga/generator/FileGenerator.java

@@ -309,7 +309,7 @@ private boolean createSymlinkToLocalFile() throws IOException {
     }
     catch (IOException ex) {
       // creates symbolic link failed - log warning and fallback to copying content
-      log.warn("Unable to create symbolic link: " + ex.getMessage());
+      log.warn("Unable to create symbolic link: {}", ex.getMessage());
       return false;
     }
   }
@@ -332,7 +332,7 @@ private void createSymlinkToSymlinkTarget() throws IOException {
     }
     catch (IOException ex) {
       // creates symbolic link failed - create text file with link instead (similar to git)
-      log.warn("Created link textfile instead of symbolic link: " + ex.getMessage());
+      log.warn("Created link textfile instead of symbolic link: {}", ex.getMessage());
       FileUtils.write(linkPath.toFile(), relativizedPath.toString(), StandardCharsets.UTF_8);
     }
   }
@@ -447,7 +447,7 @@ private void applyPostProcessor(Map<String, GeneratedFileContext> consolidatedFi
     });
 
     // apply post processor configured as implicit ALWAYS
-    consolidatedFiles.values().forEach(fileItem -> {
+    consolidatedFiles.values().forEach(fileItem ->
       pluginManager.getAll(PostProcessorPlugin.class).stream()
           .filter(implicitPlugin -> implicitPlugin.accepts(fileItem.getFileContext(), postProcessorContext))
           .filter(implicitPlugin -> implicitPlugin.implicitApply(fileItem.getFileContext(), postProcessorContext) == ImplicitApplyOptions.ALWAYS)
@@ -464,8 +464,8 @@ private void applyPostProcessor(Map<String, GeneratedFileContext> consolidatedFi
               }
               generatedFileContext.postProcessor(implicitPlugin.getName());
             });
-          });
-    });
+          })
+    );
 
     // remove items that do no longer exist
     List.copyOf(consolidatedFiles.values()).forEach(fileItem -> {

generator/src/main/java/io/wcm/devops/conga/generator/handlebars/CharsetAwareTemplateSource.java

@@ -32,6 +32,7 @@
 /**
  * Charset-aware TemplateSource for handlebars.
  */
+@SuppressWarnings("java:S2160") // equals/hashCode is implemented in base class
 class CharsetAwareTemplateSource extends AbstractTemplateSource {
 
   private final Resource file;

generator/src/main/java/io/wcm/devops/conga/generator/handlebars/HandlebarsManager.java

@@ -25,7 +25,6 @@
 import com.github.benmanes.caffeine.cache.CacheLoader;
 import com.github.benmanes.caffeine.cache.Caffeine;
 import com.github.benmanes.caffeine.cache.LoadingCache;
-import com.github.jknack.handlebars.EscapingStrategy;
 import com.github.jknack.handlebars.Handlebars;
 import com.github.jknack.handlebars.Helper;
 import com.github.jknack.handlebars.Options;
@@ -61,12 +60,8 @@ public Handlebars load(HandlebarsKey options) throws Exception {
           // setup handlebars
           TemplateLoader templateLoader = new CharsetAwareTemplateLoader(templateDirs, options.getCharset());
           EscapingStrategyPlugin escapingStrategy = pluginManager.get(options.getEscapingStrategy(), EscapingStrategyPlugin.class);
-          Handlebars handlebars = new Handlebars(templateLoader).with(new EscapingStrategy() {
-            @Override
-            public CharSequence escape(CharSequence value) {
-              return escapingStrategy.escape(value, escapingStrategyContext);
-            }
-          });
+          Handlebars handlebars = new Handlebars(templateLoader)
+              .with(value -> escapingStrategy.escape(value, escapingStrategyContext));
 
           // register helpers provided by JKnack Handlebars implementation
           handlebars.registerHelpers(StringHelpers.class);

generator/src/main/java/io/wcm/devops/conga/generator/plugins/fileheader/AbstractFileHeader.java

@@ -102,7 +102,7 @@ protected String getBlockSuffix() {
     return null;
   }
 
-  protected int getInsertPosition(@SuppressWarnings("unused") String content) {
+  protected int getInsertPosition(@SuppressWarnings({ "unused", "java:S1172" }) String content) {
     return 0;
   }
 

generator/src/main/java/io/wcm/devops/conga/generator/plugins/handlebars/helper/AbstractEachIfHelper.java

@@ -26,7 +26,7 @@
 import java.util.Map.Entry;
 import java.util.Objects;
 import java.util.Set;
-import java.util.function.BiFunction;
+import java.util.function.BiPredicate;
 import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;
 
@@ -43,12 +43,12 @@
 /**
  * Handlebars helper that extends the each helper by iterating only on list items that match a certain condition.
  */
-abstract class AbstractEachIfHelper implements HelperPlugin {
+abstract class AbstractEachIfHelper implements HelperPlugin<Object> {
 
   private final Helper<Object> delegate = new EachHelper();
-  private final BiFunction<Object, Options, Boolean> propertyEvaluator;
+  private final BiPredicate<Object, Options> propertyEvaluator;
 
-  AbstractEachIfHelper(BiFunction<Object, Options, Boolean> propertyEvaluator) {
+  AbstractEachIfHelper(BiPredicate<Object, Options> propertyEvaluator) {
     this.propertyEvaluator = propertyEvaluator;
   }
 
@@ -90,7 +90,7 @@ private Iterable<Object> filterIterable(Iterable<Object> items, String propertyN
   private boolean checkProperty(Object item, String propertyName, Options options) {
     Map<String, Object> propertyMap = toMap(options.propertySet(item));
     Object value = MapExpander.getDeep(propertyMap, propertyName);
-    return propertyEvaluator.apply(value, options);
+    return propertyEvaluator.test(value, options);
   }
 
   private Map<String, Object> toMap(Set<Entry<String, Object>> entries) {

generator/src/main/java/io/wcm/devops/conga/generator/util/ConfigInheritanceResolver.java

@@ -41,13 +41,10 @@
  */
 public final class ConfigInheritanceResolver extends AbstractConfigurableObjectTreeProcessor<Map<String, Object>> {
 
-  private static final ConfigurableProcessor<Map<String, Object>> PROCESSOR = new ConfigurableProcessor<Map<String, Object>>() {
-    @Override
-    public Map<String, Object> process(Configurable configurable, Map<String, Object> parentConfig) {
-      Map<String, Object> mergedConfig = MapMerger.merge(configurable.getConfig(), parentConfig);
-      configurable.setConfig(mergedConfig);
-      return mergedConfig;
-    }
+  private static final ConfigurableProcessor<Map<String, Object>> PROCESSOR = (configurable, parentConfig) -> {
+    Map<String, Object> mergedConfig = MapMerger.merge(configurable.getConfig(), parentConfig);
+    configurable.setConfig(mergedConfig);
+    return mergedConfig;
   };
 
   private ConfigInheritanceResolver(Set<String> ignorePropertyNames) {

generator/src/main/java/io/wcm/devops/conga/generator/util/FileUtil.java

@@ -60,7 +60,7 @@ public static String getCanonicalPath(File file) {
    * @return Canonical path
    * @deprecated use {@link FileContext#getCanonicalPath()} instead.
    */
-  @Deprecated
+  @Deprecated(forRemoval = true)
   public static String getCanonicalPath(FileContext fileContext) {
     return fileContext.getCanonicalPath();
   }

model/src/main/java/io/wcm/devops/conga/model/shared/LineEndings.java

@@ -22,6 +22,7 @@
 /**
  * Line endings for generated files.
  */
+@SuppressWarnings("java:S115") // naming convention
 public enum LineEndings {
 
   /**

model/src/main/java/io/wcm/devops/conga/model/util/DefaultUtil.java

@@ -44,14 +44,14 @@ public static <T> List<T> defaultEmptyList(List<T> list) {
     if (list != null) {
 
       // do not allow null entries in list
-      if (list.stream().filter(Objects::isNull).findFirst().isPresent()) {
+      if (list.stream().anyMatch(Objects::isNull)) {
         throw new IllegalArgumentException("Null element detected in list.");
       }
 
       return list;
     }
     else {
-      return new ArrayList<T>();
+      return new ArrayList<>();
     }
   }
 
@@ -67,7 +67,7 @@ public static <K, V> Map<K, V> defaultEmptyMap(Map<K, V> map) {
       return map;
     }
     else {
-      return new HashMap<K, V>();
+      return new HashMap<>();
     }
   }
 

model/src/main/java/io/wcm/devops/conga/model/util/MapExpander.java

@@ -26,6 +26,8 @@
 
 import org.apache.commons.lang3.ObjectUtils;
 import org.apache.commons.lang3.StringUtils;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * Expands map with shortcut keys like
@@ -46,7 +48,7 @@ private MapExpander() {
    * @return Value or null
    */
   @SuppressWarnings("unchecked")
-  public static Object getDeep(Map<String, Object> map, String key) {
+  public static @Nullable Object getDeep(@NotNull Map<String, Object> map, @NotNull String key) {
     if (map.containsKey(key)) {
       return ObjectUtils.defaultIfNull(map.get(key), "");
     }
@@ -67,7 +69,7 @@ public static Object getDeep(Map<String, Object> map, String key) {
    * @return Expanded amp
    */
   @SuppressWarnings("unchecked")
-  public static Map<String, Object> expand(Map<String, Object> map) {
+  public static @Nullable Map<String, Object> expand(@Nullable Map<String, Object> map) {
     if (map == null) {
       return null;
     }
@@ -89,9 +91,9 @@ public static Map<String, Object> expand(Map<String, Object> map) {
     return expanded;
   }
 
-  private static Map.Entry<String, Object> expandEntry(Map.Entry<String, Object> entry) {
+  private static @NotNull Map.Entry<String, Object> expandEntry(@NotNull Map.Entry<String, Object> entry) {
     if (!StringUtils.contains(entry.getKey(), ".")) {
-      return new MapEntry<String, Object>(entry.getKey(), expandDeep(entry.getValue()));
+      return new MapEntry<>(entry.getKey(), expandDeep(entry.getValue()));
     }
 
     String key = StringUtils.substringBefore(entry.getKey(), ".");
@@ -101,11 +103,11 @@ private static Map.Entry<String, Object> expandEntry(Map.Entry<String, Object> e
     map.put(remaining, expandDeep(entry.getValue()));
     Map<String, Object> expandedMap = expand(map);
 
-    return new MapEntry<String, Object>(key, expandedMap);
+    return new MapEntry<>(key, expandedMap);
   }
 
   @SuppressWarnings("unchecked")
-  private static Object expandDeep(Object object) {
+  private static @Nullable Object expandDeep(@Nullable Object object) {
     if (object instanceof Map) {
       return expand((Map<String, Object>)object);
     }

model/src/main/java/io/wcm/devops/conga/model/util/MapMerger.java

@@ -137,9 +137,9 @@ private static List<Object> mergeList(List<Object> l1, List<Object> l2) {
     }
     else {
       mergedList = new MergingList<>();
-      l1.forEach(item -> mergedList.addCheckMergeToken(item));
+      l1.forEach(mergedList::addCheckMergeToken);
     }
-    l2.forEach(item -> mergedList.add(item));
+    l2.forEach(mergedList::add);
     return mergedList;
   }
 

model/src/main/java/io/wcm/devops/conga/model/util/MapSplitter.java

@@ -22,7 +22,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.function.Function;
+import java.util.function.Predicate;
 
 import org.jetbrains.annotations.NotNull;
 
@@ -45,7 +45,7 @@ private MapSplitter() {
    */
   @SuppressWarnings("unchecked")
   public static @NotNull SplitResult splitMap(Map<String, Object> map,
-      @NotNull Function<Map.Entry<String, Object>, Boolean> matcher) {
+      @NotNull Predicate<Map.Entry<String, Object>> matcher) {
     Map<String, Object> matching = new HashMap<>();
     Map<String, Object> unmatching = new HashMap<>();
 
@@ -75,9 +75,9 @@ else if (entry.getValue() instanceof List) {
   private static void processSimpleValue(@NotNull Map.Entry<String, Object> entry,
       @NotNull Map<String, Object> matching,
       @NotNull Map<String, Object> unmatching,
-      @NotNull Function<Map.Entry<String, Object>, Boolean> matcher) {
+      @NotNull Predicate<Map.Entry<String, Object>> matcher) {
 
-    if (matcher.apply(entry)) {
+    if (matcher.test(entry)) {
       matching.put(entry.getKey(), entry.getValue());
     }
     else {
@@ -89,7 +89,7 @@ private static void processSimpleValue(@NotNull Map.Entry<String, Object> entry,
   private static void processMapValue(@NotNull Map.Entry<String, Object> entry,
       @NotNull Map<String, Object> matching,
       @NotNull Map<String, Object> unmatching,
-      @NotNull Function<Map.Entry<String, Object>, Boolean> matcher) {
+      @NotNull Predicate<Map.Entry<String, Object>> matcher) {
 
     Map<String, Object> map = (Map<String, Object>)entry.getValue();
     SplitResult subResult = splitMap(map, matcher);
@@ -105,7 +105,7 @@ private static void processMapValue(@NotNull Map.Entry<String, Object> entry,
   private static void processListValue(@NotNull Map.Entry<String, Object> entry,
       @NotNull Map<String, Object> matching,
       @NotNull Map<String, Object> unmatching,
-      @NotNull Function<Map.Entry<String, Object>, Boolean> matcher) {
+      @NotNull Predicate<Map.Entry<String, Object>> matcher) {
 
     // we cannot split up the list - so it's put to unmatched if at least one list entry is unmatched
     // to make processing easy we convert to list to a map and check of any unmatched
@@ -125,12 +125,11 @@ private static void processListValue(@NotNull Map.Entry<String, Object> entry,
 
   private static boolean listHasSubStructures(@NotNull List<Object> list) {
     return list.stream()
-        .filter(item -> (item instanceof List) || (item instanceof Map))
-        .findFirst().isPresent();
+        .anyMatch(item -> (item instanceof List) || (item instanceof Map));
   }
 
   /**
-   * Result of {@link #splitMap(Map, Function)} method.
+   * Result of {@link #splitMap(Map, Predicate)} method.
    */
   public static final class SplitResult {
 

model/src/main/java/io/wcm/devops/conga/model/util/MergingList.java

@@ -35,7 +35,7 @@ final class MergingList<T> extends LinkedList<T> {
   }
 
   MergingList(MergingList<T> mergingList) {
-    mergingList.forEach(item -> super.add(item));
+    mergingList.forEach(super::add);
     this.mergePositionIndex = mergingList.mergePositionIndex;
   }