Move Tiny properties to separate class

src/main/java/net/fabricmc/mappingio/format/tiny/Tiny1FileReader.java

@@ -131,7 +131,7 @@ private static void read(ColumnFileReader reader, MappingVisitor visitor) throws
 						}
 					} else {
 						String line = reader.nextCol();
-						final String prefix = "# INTERMEDIARY-COUNTER ";
+						final String prefix = TinyProperties.intermediaryCounter + " ";
 						String[] parts;
 
 						if (line.startsWith(prefix)
@@ -140,13 +140,13 @@ private static void read(ColumnFileReader reader, MappingVisitor visitor) throws
 
 							switch (parts[0]) {
 							case "class":
-								property = nextIntermediaryClassProperty;
+								property = TinyProperties.NEXT_INTERMEDIARY_CLASS;
 								break;
 							case "field":
-								property = nextIntermediaryFieldProperty;
+								property = TinyProperties.NEXT_INTERMEDIARY_FIELD;
 								break;
 							case "method":
-								property = nextIntermediaryMethodProperty;
+								property = TinyProperties.NEXT_INTERMEDIARY_METHOD;
 								break;
 							}
 
@@ -176,8 +176,4 @@ private static void readDstNames(ColumnFileReader reader, MappedElementKind subj
 			if (!name.isEmpty()) visitor.visitDstName(subjectKind, dstNs, name);
 		}
 	}
-
-	static final String nextIntermediaryClassProperty = "next-intermediary-class";
-	static final String nextIntermediaryFieldProperty = "next-intermediary-field";
-	static final String nextIntermediaryMethodProperty = "next-intermediary-method";
 }

src/main/java/net/fabricmc/mappingio/format/tiny/Tiny1FileWriter.java

@@ -60,20 +60,18 @@ public void visitNamespaces(String srcNamespace, List<String> dstNamespaces) thr
 	@Override
 	public void visitMetadata(String key, String value) throws IOException {
 		switch (key) {
-		case Tiny1FileReader.nextIntermediaryClassProperty:
-		case Tiny1FileReader.nextIntermediaryFieldProperty:
-		case Tiny1FileReader.nextIntermediaryMethodProperty:
-			write("# INTERMEDIARY-COUNTER ");
-
+		case TinyProperties.NEXT_INTERMEDIARY_CLASS:
+		case TinyProperties.NEXT_INTERMEDIARY_FIELD:
+		case TinyProperties.NEXT_INTERMEDIARY_METHOD:
 			switch (key) {
-			case Tiny1FileReader.nextIntermediaryClassProperty:
-				write("class");
+			case TinyProperties.NEXT_INTERMEDIARY_CLASS:
+				write(TinyProperties.NEXT_INTERMEDIARY_CLASS);
 				break;
-			case Tiny1FileReader.nextIntermediaryFieldProperty:
-				write("field");
+			case TinyProperties.NEXT_INTERMEDIARY_FIELD:
+				write(TinyProperties.NEXT_INTERMEDIARY_FIELD);
 				break;
-			case Tiny1FileReader.nextIntermediaryMethodProperty:
-				write("method");
+			case TinyProperties.NEXT_INTERMEDIARY_METHOD:
+				write(TinyProperties.NEXT_INTERMEDIARY_METHOD);
 				break;
 			default:
 				throw new IllegalStateException();

src/main/java/net/fabricmc/mappingio/format/tiny/TinyProperties.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.mappingio.format.tiny;
+
+/**
+ * All standard properties of the Tiny format.
+ * Internally, trees use the lowest common denominator.
+ */
+public final class TinyProperties {
+	// Tiny v1
+	static final String intermediaryCounter = "# INTERMEDIARY COUNTER";
+	public static final String NEXT_INTERMEDIARY_CLASS = intermediaryCounter + " class";
+	public static final String NEXT_INTERMEDIARY_FIELD = intermediaryCounter + " field";
+	public static final String NEXT_INTERMEDIARY_METHOD = intermediaryCounter + " method";
+
+	// Tiny v2
+	public static final String NEXT_INTERMEDIARY_CLASS_TINY_2 = "next-intermediary-class";
+	public static final String NEXT_INTERMEDIARY_FIELD_TINY_2 = "next-intermediary-field";
+	public static final String NEXT_INTERMEDIARY_METHOD_TINY_2 = "next-intermediary-method";
+	public static final String MISSING_LVT_INDICES = "missing-lvt-indices";
+	public static final String ESCAPED_NAMES = "escaped-names";
+}