Pull useGuavaInstead logic up to JavacSingularizer

src/core/lombok/javac/handlers/JavacSingularsRecipes.java

@@ -32,6 +32,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
+import lombok.ConfigurationKeys;
 import lombok.core.LombokImmutableList;
 import lombok.core.SpiLoadUtil;
 import lombok.core.TypeLibrary;
@@ -102,7 +103,9 @@ public class JavacSingularsRecipes {
 	}
 	
 	public JavacSingularizer getSingularizer(String fqn, JavacNode node) {
-		return singularizers.get(fqn).getGuavaInsteadIfNeeded(node);
+		final JavacSingularizer singularizer = singularizers.get(fqn);
+		final boolean useGuavaInstead = Boolean.TRUE.equals(node.getAst().readConfiguration(ConfigurationKeys.SINGULAR_USE_GUAVA));
+		return useGuavaInstead ? singularizer.getGuavaInstead(node) : singularizer;
 	}
 	
 	public static final class SingularData {
@@ -155,7 +158,7 @@ public class JavacSingularsRecipes {
 	public static abstract class JavacSingularizer {
 		public abstract LombokImmutableList<String> getSupportedTypes();
 
-		protected JavacSingularizer getGuavaInsteadIfNeeded(JavacNode node) {
+		protected JavacSingularizer getGuavaInstead(JavacNode node) {
 			return this;
 		}
 		

src/core/lombok/javac/handlers/singulars/JavacJavaUtilListSetSingularizer.java

@@ -45,12 +45,8 @@ import com.sun.tools.javac.util.Name;
 
 abstract class JavacJavaUtilListSetSingularizer extends JavacJavaUtilSingularizer {
 
-	@Override
-	protected JavacSingularizer getGuavaInsteadIfNeeded(JavacNode node) {
-		if (useGuavaInstead(node)) {
-			return guavaListSetSingularizer;
-		}
-		return this;
+	@Override protected JavacSingularizer getGuavaInstead(JavacNode node) {
+		return guavaListSetSingularizer;
 	}
 
 	@Override public java.util.List<Name> listFieldsToBeGenerated(SingularData data, JavacNode builderType) {

src/core/lombok/javac/handlers/singulars/JavacJavaUtilMapSingularizer.java

@@ -53,12 +53,8 @@ public class JavacJavaUtilMapSingularizer extends JavacJavaUtilSingularizer {
 		return LombokImmutableList.of("java.util.Map", "java.util.SortedMap", "java.util.NavigableMap");
 	}
 
-	@Override
-	protected JavacSingularizer getGuavaInsteadIfNeeded(JavacNode node) {
-		if (useGuavaInstead(node)) {
-			return guavaMapSingularizer;
-		}
-		return this;
+	@Override protected JavacSingularizer getGuavaInstead(JavacNode node) {
+		return guavaMapSingularizer;
 	}
 
 	@Override public java.util.List<Name> listFieldsToBeGenerated(SingularData data, JavacNode builderType) {

src/core/lombok/javac/handlers/singulars/JavacJavaUtilSingularizer.java

@@ -42,10 +42,6 @@ abstract class JavacJavaUtilSingularizer extends JavacSingularizer {
 	protected final JavacSingularizer guavaListSetSingularizer = new JavacGuavaSetListSingularizer();
 	protected final JavacSingularizer guavaMapSingularizer = new JavacGuavaMapSingularizer();
 	
-	protected boolean useGuavaInstead(JavacNode node) {
-		return Boolean.TRUE.equals(node.getAst().readConfiguration(ConfigurationKeys.SINGULAR_USE_GUAVA));
-	}
-	
 	protected List<JCStatement> createJavaUtilSetMapInitialCapacitySwitchStatements(JavacTreeMaker maker, SingularData data, JavacNode builderType, boolean mapMode, String emptyCollectionMethod, String singletonCollectionMethod, String targetType, JCTree source, String builderVariable) {
 		List<JCExpression> jceBlank = List.nil();
 		ListBuffer<JCCase> cases = new ListBuffer<JCCase>();