3 files changed, 85 insertions, 8 deletions

diff --git a/src/main/java/ftbsc/lll/mapper/tools/Mapper.java b/src/main/java/ftbsc/lll/mapper/tools/Mapper.java
new file mode 100644
index 0000000..2b59d17
--- /dev/null
+++ b/src/main/java/ftbsc/lll/mapper/tools/Mapper.java
@@ -0,0 +1,78 @@
+package ftbsc.lll.mapper.tools;
+
+import ftbsc.lll.exceptions.MappingNotFoundException;
+import ftbsc.lll.mapper.tools.data.ClassData;
+import ftbsc.lll.mapper.tools.data.FieldData;
+import ftbsc.lll.mapper.tools.data.MethodData;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * An object containing parsed mapping data, which can
+ * apply a conversion as requested.
+ */
+public class Mapper {
+	/**
+	 * A {@link Map} tying each plain class name to its class data.
+	 */
+	protected final Map<String, ClassData> mappings = new HashMap<>();
+
+	/**
+	 * Gets the {@link ClassData} given the plain name.
+	 * @param name the plain internal name of the desired class
+	 * @return the mapped name of the class
+	 * @throws MappingNotFoundException if no mapping is found
+	 */
+	public ClassData getClassData(String name) throws MappingNotFoundException {
+		ClassData data = this.mappings.get(name.replace('.', '/'));
+		if(data == null)
+			throw new MappingNotFoundException("class", name);
+		else return data;
+	}
+
+	/**
+	 * Gets the mapped name of a method
+	 * @param parent the plain internal name of the parent class
+	 * @param name the plain method name
+	 * @param descriptor the descriptor of the method
+	 * @return the mapped name of the given member
+	 * @throws MappingNotFoundException if no mapping is found
+	 */
+	public MethodData getMethodData(String parent, String name, String descriptor) throws MappingNotFoundException {
+		return this.getClassData(parent).mapMethod(name, descriptor);
+	}
+
+	/**
+	 * Gets the mapped name of a field.
+	 * @param parent the plain internal name of the parent class
+	 * @param name the field's plain name
+	 * @return the mapped name of the requested field
+	 * @throws MappingNotFoundException if no mapping is found
+	 */
+	public FieldData getFieldData(String parent, String name) throws MappingNotFoundException {
+		return this.getClassData(parent).mapField(name);
+	}
+
+	/**
+	 * Gets the "raw mappings".
+	 * @return a {@link Map} tying each {@link ClassData} to the class' plain name
+	 */
+	public Map<String, ClassData> getRawMappings() {
+		return this.mappings;
+	}
+
+	/**
+	 * Builds a new {@link Mapper} that functions in reverse to this one (i.e. one that
+	 * considers as "mapped" what this one considers plain, and vice versa).
+	 * @return the inverted mapper
+	 */
+	public Mapper getInverted() {
+		Mapper inverted = new Mapper();
+		this.mappings.forEach((name, data) -> {
+			ClassData reverse = data.generateReverseMappings(this);
+			inverted.mappings.put(data.nameMapped, reverse);
+		});
+		return inverted;
+	}
+}
diff --git a/src/main/java/ftbsc/lll/mapper/tools/MappingUtils.java b/src/main/java/ftbsc/lll/mapper/tools/MappingUtils.java
index fcc5525..fc121dd 100644
--- a/src/main/java/ftbsc/lll/mapper/tools/MappingUtils.java
+++ b/src/main/java/ftbsc/lll/mapper/tools/MappingUtils.java
@@ -1,7 +1,6 @@
 package ftbsc.lll.mapper.tools;
 
 import ftbsc.lll.exceptions.MappingNotFoundException;
-import ftbsc.lll.mapper.IMapper;
 import ftbsc.lll.tools.DescriptorBuilder;
 import org.objectweb.asm.Type;
 
@@ -14,11 +13,11 @@ public class MappingUtils {
 	/**
 	 * Maps a method descriptor, replacing its class references with their mapped counterparts.
 	 * @param descriptor a {@link String} containing the descriptor
-	 * @param mapper the {@link IMapper} to use for the process
+	 * @param mapper the {@link Mapper} to use for the process
 	 * @param reverse if true it uses the inverted mapper rather than the normal one
 	 * @return the mapped descriptor
 	 */
-	public static String mapMethodDescriptor(String descriptor, IMapper mapper, boolean reverse) {
+	public static String mapMethodDescriptor(String descriptor, Mapper mapper, boolean reverse) {
 		Type method = Type.getMethodType(descriptor);
 		Type[] arguments = method.getArgumentTypes();
 		Type returnType = method.getReturnType();
@@ -31,13 +30,13 @@ public class MappingUtils {
 	}
 
 	/**
-	 * Given a {@link Type} and a valid {@link IMapper} it returns its mapped counterpart.
+	 * Given a {@link Type} and a valid {@link Mapper} it returns its mapped counterpart.
 	 * @param type the type in question
-	 * @param mapper the {@link IMapper} to use for the process
+	 * @param mapper the {@link Mapper} to use for the process
 	 * @param reverse if true it uses the inverted mapper rather than the normal one
 	 * @return the mapped type
 	 */
-	public static Type mapType(Type type, IMapper mapper, boolean reverse) {
+	public static Type mapType(Type type, Mapper mapper, boolean reverse) {
 		//unwrap arrays
 		Type unwrapped = type;
 		int arrayLevel = 0;
diff --git a/src/main/java/ftbsc/lll/mapper/tools/data/ClassData.java b/src/main/java/ftbsc/lll/mapper/tools/data/ClassData.java
index 784d0e0..4b4f58e 100644
--- a/src/main/java/ftbsc/lll/mapper/tools/data/ClassData.java
+++ b/src/main/java/ftbsc/lll/mapper/tools/data/ClassData.java
@@ -1,7 +1,7 @@
 package ftbsc.lll.mapper.tools.data;
 
 import ftbsc.lll.exceptions.MappingNotFoundException;
-import ftbsc.lll.mapper.IMapper;
+import ftbsc.lll.mapper.tools.Mapper;
 import ftbsc.lll.mapper.tools.MappingUtils;
 
 import java.util.HashMap;
@@ -85,7 +85,7 @@ public class ClassData {
 	 * @param mapper the mapper that generated this data
 	 * @return a ClassData representing the inverted mappings
 	 */
-	public ClassData generateReverseMappings(IMapper mapper) {
+	public ClassData generateReverseMappings(Mapper mapper) {
 		ClassData reverse = new ClassData(this.nameMapped, this.name);
 		this.methods.forEach((signature, data) -> reverse.addMethod(nameMapped, signature.name,
 			MappingUtils.mapMethodDescriptor(signature.descriptor, mapper, false)));