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package moe.nea.zwirn;
import java.util.ArrayList;
import java.util.List;
public interface Descriptor {
Descriptor mapClassName(SimpleRemapper remapper);
String toJvmDescriptor();
interface Type extends Descriptor {
Type mapClassName(SimpleRemapper remapper);
static Type readType(GoodStringReader reader) {
if (reader.peekChar() == 'V') {
reader.nextChar();
return VoidType.VOID;
}
return Field.readField(reader);
}
}
interface Field extends Type {
Field mapClassName(SimpleRemapper remapper);
static Field readField(GoodStringReader reader) {
switch (reader.nextChar()) {
case 'L':
return new Class(reader.readUntil(';').replace('/', '.'));
case 'Z':
return DefaultField.BOOLEAN;
case 'B':
return DefaultField.BYTE;
case 'I':
return DefaultField.INT;
case 'D':
return DefaultField.DOUBLE;
case 'J':
return DefaultField.LONG;
case 'S':
return DefaultField.SHORT;
case 'F':
return DefaultField.FLOAT;
case 'C':
return DefaultField.CHAR;
case '[':
return new Array(readField(reader));
}
throw new IllegalStateException("Unknown type");
}
}
record Method(List<Field> argumentTypes, Type returnType) implements Descriptor {
@Override
public Descriptor mapClassName(SimpleRemapper remapper) {
List<Field> newArgumentTypes = new ArrayList<>(argumentTypes.size());
for (Field argumentType : argumentTypes) {
newArgumentTypes.add(argumentType.mapClassName(remapper));
}
return new Method(newArgumentTypes, returnType.mapClassName(remapper));
}
@Override
public String toJvmDescriptor() {
StringBuilder sb = new StringBuilder();
sb.append("(");
for (Field argumentType : argumentTypes) {
sb.append(argumentType.toJvmDescriptor());
}
sb.append(")");
sb.append(returnType.toJvmDescriptor());
return sb.toString();
}
public static Method readMethod(GoodStringReader reader) {
if (reader.nextChar() != '(')
throw new IllegalStateException("Expected (");
List<Field> argument = new ArrayList<>();
while (reader.peekChar() != ')') {
argument.add(Field.readField(reader));
}
reader.nextChar(); // Consume )
return new Method(argument, Type.readType(reader));
}
}
record Array(Field field) implements Field {
@Override
public String toJvmDescriptor() {
return "[" + field.toJvmDescriptor();
}
@Override
public Array mapClassName(SimpleRemapper remapper) {
return new Array(field.mapClassName(remapper));
}
}
record Class(String dottedName) implements Field {
@Override
public String toJvmDescriptor() {
return "L" + dottedName.replace('.', '/') + ";";
}
@Override
public Field mapClassName(SimpleRemapper remapper) {
return new Class(remapper.remapClass(dottedName));
}
}
enum VoidType implements Type {
VOID;
@Override
public String toJvmDescriptor() {
return "V";
}
@Override
public VoidType mapClassName(SimpleRemapper remapper) {
return this;
}
}
enum DefaultField implements Field {
BOOLEAN("Z"),
BYTE("B"),
INT("I"),
DOUBLE("D"),
LONG("J"),
SHORT("S"),
FLOAT("F"),
CHAR("C");
private final String jvmDescriptor;
DefaultField(String jvmDescriptor) {
this.jvmDescriptor = jvmDescriptor;
}
@Override
public String toJvmDescriptor() {
return jvmDescriptor;
}
@Override
public DefaultField mapClassName(SimpleRemapper remapper) {
return this;
}
}
}
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