Adopt Style.from instead of SourceFile.getStyle (#859)

* StyleFrom

Use this link to re-run the recipe: https://app.moderne.io/builder/6OMjIdVBh?organizationId=ODQ2MGExMTUtNDg0My00N2EwLTgzMGMtNGE1NGExMTBmZDkw

Co-authored-by: Moderne <[email protected]>

* Replace Optional with method that takes a default value

* Polish

* Replace null check with default

---------

Co-authored-by: Moderne <[email protected]>

Author: timtebeek

src/main/java/org/openrewrite/java/migrate/UseTabsOrSpaces.java

@@ -25,6 +25,7 @@
 import org.openrewrite.java.style.TabsAndIndentsStyle;
 import org.openrewrite.java.tree.J;
 import org.openrewrite.java.tree.JavaSourceFile;
+import org.openrewrite.style.Style;
 
 import static java.util.Objects.requireNonNull;
 
@@ -43,7 +44,7 @@ public String getDisplayName() {
     @Override
     public String getDescription() {
         return "This is useful for one-off migrations of a codebase that has mixed indentation styles, while " +
-               "preserving all other auto-detected formatting rules.";
+                "preserving all other auto-detected formatting rules.";
     }
 
     @Override
@@ -53,11 +54,8 @@ public TreeVisitor<?, ExecutionContext> getVisitor() {
             public J visit(@Nullable Tree tree, ExecutionContext ctx) {
                 if (tree instanceof JavaSourceFile) {
                     JavaSourceFile cu = (JavaSourceFile) requireNonNull(tree);
-                    TabsAndIndentsStyle style = ((SourceFile) cu).getStyle(TabsAndIndentsStyle.class);
-                    if (style == null) {
-                        style = IntelliJ.tabsAndIndents();
-                    }
-                    style = style.withUseTabCharacter(useTabs);
+                    TabsAndIndentsStyle style = Style.from(TabsAndIndentsStyle.class, cu, IntelliJ::tabsAndIndents)
+                            .withUseTabCharacter(useTabs);
                     return new NormalizeTabsOrSpacesVisitor<>(style).visit(tree, ctx);
                 }
                 return (J) tree;

src/main/java/org/openrewrite/java/migrate/lang/UseTextBlocks.java

@@ -30,14 +30,14 @@
 import org.openrewrite.java.tree.TypeUtils;
 import org.openrewrite.marker.Markers;
 import org.openrewrite.staticanalysis.kotlin.KotlinFileChecker;
+import org.openrewrite.style.Style;
 
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Base64;
 import java.util.List;
-import java.util.Optional;
 
 import static java.util.Objects.requireNonNull;
 import static java.util.stream.Collectors.toList;
@@ -145,8 +145,7 @@ private J.Literal toTextBlock(J.Binary binary, String content, List<J.Literal> s
                     }
                 }
 
-                TabsAndIndentsStyle tabsAndIndentsStyle = Optional.ofNullable(getCursor().firstEnclosingOrThrow(SourceFile.class)
-                        .getStyle(TabsAndIndentsStyle.class)).orElse(IntelliJ.tabsAndIndents());
+                TabsAndIndentsStyle tabsAndIndentsStyle = Style.from(TabsAndIndentsStyle.class, getCursor().firstEnclosingOrThrow(SourceFile.class), IntelliJ::tabsAndIndents);
                 boolean useTab = tabsAndIndentsStyle.getUseTabCharacter();
                 int tabSize = tabsAndIndentsStyle.getTabSize();