Use older APIs

Author: robinst

commonmark-ext-autolink/src/main/java/org/commonmark/ext/autolink/AutolinkExtension.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.autolink;
 
+import java.util.Arrays;
 import java.util.EnumSet;
 import java.util.Set;
 import org.commonmark.Extension;
@@ -57,7 +58,12 @@ public Builder linkTypes(AutolinkType... linkTypes) {
                 throw new NullPointerException("linkTypes must not be null");
             }
 
-            return this.linkTypes(Set.of(linkTypes));
+            if (linkTypes.length == 0) {
+                throw new IllegalArgumentException("linkTypes must not be empty");
+            }
+
+            this.linkTypes = EnumSet.copyOf(Arrays.asList(linkTypes));
+            return this;
         }
 
         /**

commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/FootnotesExtension.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.footnotes;
 
+import java.util.Collections;
 import java.util.Set;
 import org.commonmark.Extension;
 import org.commonmark.ext.footnotes.internal.*;
@@ -83,7 +84,7 @@ public NodeRenderer create(MarkdownNodeRendererContext context) {
 
                     @Override
                     public Set<Character> getSpecialCharacters() {
-                        return Set.of();
+                        return Collections.emptySet();
                     }
                 });
     }

commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteBlockParser.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.footnotes.internal;
 
+import java.util.Collections;
 import java.util.List;
 import org.commonmark.ext.footnotes.FootnoteDefinition;
 import org.commonmark.node.Block;
@@ -54,7 +55,7 @@ public BlockContinue tryContinue(ParserState parserState) {
     public List<DefinitionMap<?>> getDefinitions() {
         var map = new DefinitionMap<>(FootnoteDefinition.class);
         map.putIfAbsent(block.getLabel(), block);
-        return List.of(map);
+        return Collections.singletonList(map);
     }
 
     public static class Factory implements BlockParserFactory {

commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteHtmlNodeRenderer.java

@@ -82,7 +82,12 @@ public FootnoteHtmlNodeRenderer(HtmlNodeRendererContext context) {
 
     @Override
     public Set<Class<? extends Node>> getNodeTypes() {
-        return Set.of(FootnoteReference.class, InlineFootnote.class, FootnoteDefinition.class);
+        return Collections.unmodifiableSet(
+                new HashSet<>(
+                        Arrays.asList(
+                                FootnoteReference.class,
+                                InlineFootnote.class,
+                                FootnoteDefinition.class)));
     }
 
     @Override
@@ -203,7 +208,10 @@ private ReferenceInfo registerReference(Node node, String label) {
     }
 
     private void renderReference(Node node, ReferenceInfo referenceInfo) {
-        html.tag("sup", context.extendAttributes(node, "sup", Map.of("class", "footnote-ref")));
+        html.tag(
+                "sup",
+                context.extendAttributes(
+                        node, "sup", Collections.singletonMap("class", "footnote-ref")));
 
         var href = "#" + referenceInfo.definitionId;
         var attrs = new LinkedHashMap<String, String>();
@@ -231,7 +239,7 @@ private void renderDefinition(Node def, ReferencedDefinition referencedDefinitio
                     // Because we're manually rendering the <p> for the last paragraph, do the same
                     // for all other paragraphs for consistency (Paragraph rendering might be
                     // overwritten by a custom renderer).
-                    html.tag("p", context.extendAttributes(node, "p", Map.of()));
+                    html.tag("p", context.extendAttributes(node, "p", Collections.emptyMap()));
                     renderChildren(node);
                     html.tag("/p");
                     html.line();
@@ -241,14 +249,14 @@ private void renderDefinition(Node def, ReferencedDefinition referencedDefinitio
                 node = node.getNext();
             }
 
-            html.tag("p", context.extendAttributes(lastParagraph, "p", Map.of()));
+            html.tag("p", context.extendAttributes(lastParagraph, "p", Collections.emptyMap()));
             renderChildren(lastParagraph);
             html.raw(" ");
             renderBackrefs(def, referencedDefinition);
             html.tag("/p");
             html.line();
         } else if (def instanceof InlineFootnote) {
-            html.tag("p", context.extendAttributes(def, "p", Map.of()));
+            html.tag("p", context.extendAttributes(def, "p", Collections.emptyMap()));
             renderChildren(def);
             html.raw(" ");
             renderBackrefs(def, referencedDefinition);
@@ -283,7 +291,8 @@ private void renderBackrefs(Node def, ReferencedDefinition referencedDefinition)
             if (refNumber > 1) {
                 html.tag(
                         "sup",
-                        context.extendAttributes(def, "sup", Map.of("class", "footnote-ref")));
+                        context.extendAttributes(
+                                def, "sup", Collections.singletonMap("class", "footnote-ref")));
                 html.raw(String.valueOf(refNumber));
                 html.tag("/sup");
             }

commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteMarkdownNodeRenderer.java

@@ -1,5 +1,8 @@
 package org.commonmark.ext.footnotes.internal;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
 import java.util.Set;
 import org.commonmark.ext.footnotes.FootnoteDefinition;
 import org.commonmark.ext.footnotes.FootnoteReference;
@@ -21,7 +24,12 @@ public FootnoteMarkdownNodeRenderer(MarkdownNodeRendererContext context) {
 
     @Override
     public Set<Class<? extends Node>> getNodeTypes() {
-        return Set.of(FootnoteReference.class, InlineFootnote.class, FootnoteDefinition.class);
+        return Collections.unmodifiableSet(
+                new HashSet<>(
+                        Arrays.asList(
+                                FootnoteReference.class,
+                                InlineFootnote.class,
+                                FootnoteDefinition.class)));
     }
 
     @Override

commonmark-ext-gfm-alerts/src/main/java/org/commonmark/ext/gfm/alerts/AlertsExtension.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.gfm.alerts;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Locale;
@@ -121,7 +122,7 @@ public NodeRenderer create(MarkdownNodeRendererContext context) {
 
                     @Override
                     public Set<Character> getSpecialCharacters() {
-                        return Set.of();
+                        return Collections.emptySet();
                     }
                 });
     }

commonmark-ext-gfm-alerts/src/main/java/org/commonmark/ext/gfm/alerts/internal/AlertBlockParser.java

@@ -1,6 +1,6 @@
 package org.commonmark.ext.gfm.alerts.internal;
 
-import java.util.List;
+import java.util.Collections;
 import java.util.Locale;
 import java.util.Set;
 import java.util.regex.Pattern;
@@ -91,7 +91,7 @@ public void parseInlines(InlineParser inlineParser) {
         // Set source spans on the title node from the source line
         var sourceSpan = titleLine.getSourceSpan();
         if (sourceSpan != null) {
-            titleNode.setSourceSpans(List.of(sourceSpan));
+            titleNode.setSourceSpans(Collections.singletonList(sourceSpan));
         }
 
         // Body blocks were attached as children during block parsing. Prepend the title.

commonmark-ext-gfm-alerts/src/main/java/org/commonmark/ext/gfm/alerts/internal/AlertHtmlNodeRenderer.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.gfm.alerts.internal;
 
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import org.commonmark.ext.gfm.alerts.Alert;
@@ -40,7 +41,9 @@ protected void renderAlert(Alert alert) {
 
         // Render alert title
         htmlWriter.tag(
-                "p", context.extendAttributes(alert, "p", Map.of("class", "markdown-alert-title")));
+                "p",
+                context.extendAttributes(
+                        alert, "p", Collections.singletonMap("class", "markdown-alert-title")));
         var first = alert.getFirstChild();
         if (first instanceof AlertTitle) {
             renderChildren(first);

commonmark-ext-gfm-alerts/src/main/java/org/commonmark/ext/gfm/alerts/internal/AlertNodeRenderer.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.gfm.alerts.internal;
 
+import java.util.Collections;
 import java.util.Set;
 import org.commonmark.ext.gfm.alerts.Alert;
 import org.commonmark.ext.gfm.alerts.AlertTitle;
@@ -10,7 +11,7 @@ public abstract class AlertNodeRenderer implements NodeRenderer {
 
     @Override
     public Set<Class<? extends Node>> getNodeTypes() {
-        return Set.of(Alert.class);
+        return Collections.singleton(Alert.class);
     }
 
     @Override

commonmark-ext-gfm-strikethrough/src/main/java/org/commonmark/ext/gfm/strikethrough/StrikethroughExtension.java

@@ -1,5 +1,6 @@
 package org.commonmark.ext.gfm.strikethrough;
 
+import java.util.Collections;
 import java.util.Set;
 import org.commonmark.Extension;
 import org.commonmark.ext.gfm.strikethrough.internal.StrikethroughDelimiterProcessor;
@@ -96,7 +97,7 @@ public NodeRenderer create(MarkdownNodeRendererContext context) {
 
                     @Override
                     public Set<Character> getSpecialCharacters() {
-                        return Set.of('~');
+                        return Collections.singleton('~');
                     }
                 });
     }