feat: added getRawMappings(), rewritten MultiMapper for efficiency

src/main/java/ftbsc/lll/mapper/AbstractMapper.java

@@ -58,4 +58,9 @@ public abstract class AbstractMapper implements IMapper {
 	public FieldData getFieldData(String parent, String name) throws MappingNotFoundException {
 		return this.getClassData(parent).mapField(name);
 	}
+
+	@Override
+	public Map<String, ClassData> getRawMappings() {
+		return this.mappings;
+	}
 }

src/main/java/ftbsc/lll/mapper/IMapper.java

@@ -77,4 +77,10 @@ public interface IMapper {
 	 * @throws MappingNotFoundException if no mapping is found
 	 */
 	FieldData getFieldData(String parent, String name) throws MappingNotFoundException;
+
+	/**
+	 * Fetches the "raw mappings" from an {@link IMapper}.
+	 * @return a map tying each {@link ClassData} to the class' plain name
+	 */
+	Map<String, ClassData> getRawMappings();
 }

src/main/java/ftbsc/lll/mapper/impl/MultiMapper.java

@@ -2,16 +2,13 @@ package ftbsc.lll.mapper.impl;
 
 import com.google.auto.service.AutoService;
 import ftbsc.lll.exceptions.MalformedMappingsException;
-import ftbsc.lll.exceptions.MappingNotFoundException;
+import ftbsc.lll.mapper.AbstractMapper;
 import ftbsc.lll.mapper.IMapper;
 import ftbsc.lll.mapper.MapperProvider;
 import ftbsc.lll.mapper.tools.MappingUtils;
 import ftbsc.lll.mapper.tools.data.ClassData;
-import ftbsc.lll.mapper.tools.data.FieldData;
-import ftbsc.lll.mapper.tools.data.MethodData;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 /**
@@ -19,13 +16,7 @@ import java.util.List;
  * sequence of mappers applied one after the other.
  */
 @AutoService(IMapper.class)
-public class MultiMapper implements IMapper {
+public class MultiMapper extends AbstractMapper {
-
-	/**
-	 * The list of mappers.
-	 */
-	private final List<IMapper> mapperList = new ArrayList<>();
-
 	@Override
 	public boolean claim(List<String> lines) {
 		return lines.get(0).equals("lll multimapper");
@@ -33,52 +24,42 @@ public class MultiMapper implements IMapper {
 
 	@Override
 	public void populate(List<String> lines, boolean ignoreErrors) throws MalformedMappingsException {
+		List<IMapper> mapperList = new ArrayList<>();
 		for(int i = 1; i < lines.size(); i++) {
 			List<String> data = MapperProvider.fetchFromLocalOrRemote(lines.get(i));
 			IMapper mapper = MapperProvider.getMapper(data);
 			mapper.populate(data, ignoreErrors);
-			this.mapperList.add(mapper);
+			mapperList.add(mapper);
 		}
+
+		mapperList.get(0).getRawMappings().forEach((name, data) -> {
+			ClassData finalData = data;
+			for(int i = 1; i < mapperList.size(); i++)
+				finalData = mapperList.get(i).getClassData(finalData.nameMapped);
+
+			ClassData sumData = new ClassData(data.name, finalData.nameMapped);
+
+			data.getMethods().forEach((signature, methodData) -> {
+				for(int i = 1; i < mapperList.size(); i++) {
+					IMapper mapper = mapperList.get(i);
+					methodData = mapper.getMethodData(methodData.parentClass.nameMapped, methodData.nameMapped,
+						MappingUtils.mapMethodDescriptor(methodData.signature.descriptor, mapper, false));
+				}
+				sumData.addMethod(signature.name, methodData.nameMapped, signature.descriptor);
+			});
+
+			data.getFields().forEach((fieldName, fieldData) -> {
+				for(int i = 1; i < mapperList.size(); i++)
+					fieldData = mapperList.get(i).getFieldData(fieldData.parentClass.nameMapped, fieldData.nameMapped);
+				sumData.addField(fieldName, fieldData.nameMapped);
+			});
+
+			this.mappings.put(sumData.name, sumData);
+		});
 	}
 
 	@Override
-	public IMapper getInverted() {
+	protected AbstractMapper newInstance() {
-		MultiMapper reverse = new MultiMapper();
+		return new MultiMapper();
-		this.mapperList.forEach(m -> reverse.mapperList.add(m.getInverted()));
-		Collections.reverse(reverse.mapperList);
-		return reverse;
-	}
-
-	@Override
-	public void reset() {
-		this.mapperList.forEach(IMapper::reset);
-		this.mapperList.clear();
-	}
-
-	@Override
-	public ClassData getClassData(String name) throws MappingNotFoundException {
-		ClassData classData = this.mapperList.get(0).getClassData(name);
-		for(int i = 1; i < this.mapperList.size(); i++)
-			classData = this.mapperList.get(i).getClassData(classData.nameMapped);
-		return classData;
-	}
-
-	@Override
-	public MethodData getMethodData(String parent, String name, String descriptor) throws MappingNotFoundException {
-		MethodData methodData = this.mapperList.get(0).getMethodData(parent, name, descriptor);
-		for(int i = 1; i < this.mapperList.size(); i++) {
-			IMapper mapper = this.mapperList.get(i);
-			methodData = mapper.getMethodData(methodData.parentClass.nameMapped, methodData.nameMapped,
-				MappingUtils.mapMethodDescriptor(methodData.signature.descriptor, mapper, false));
-		}
-		return methodData;
-	}
-
-	@Override
-	public FieldData getFieldData(String parent, String name) throws MappingNotFoundException {
-		FieldData fieldData = this.mapperList.get(0).getFieldData(parent, name);
-		for(int i = 1; i < this.mapperList.size(); i++)
-			fieldData = this.mapperList.get(i).getFieldData(fieldData.parentClass.nameMapped, fieldData.nameMapped);
-		return fieldData;
 	}
 }

src/main/java/ftbsc/lll/mapper/tools/data/ClassData.java

@@ -115,4 +115,20 @@ public class ClassData {
 			throw new MappingNotFoundException("field", String.format("%s.%s", this.name, fieldName));
 		else return data;
 	}
+
+	/**
+	 * Gets the underlying {@link Map} for {@link MethodData}.
+	 * @return a {@link Map} tying each {@link MethodSignature} to its {@link MethodData}
+	 */
+	public Map<MethodSignature, MethodData> getMethods() {
+		return this.methods;
+	}
+
+	/**
+	 * Gets the underlying {@link Map} for {@link FieldData}.
+	 * @return a {@link Map} tying each field name to its {@link FieldData}
+	 */
+	public Map<String, FieldData> getFields() {
+		return this.fields;
+	}
 }