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General utilities

There is a newer version: 2.5.0

package net.pincette.cls;

import java.util.function.Supplier;

public class Util {

  private static final String[][] basicTypes = {
    {"B", "byte"},
    {"C", "char"},
    {"D", "double"},
    {"F", "float"},
    {"I", "int"},
    {"J", "long"},
    {"S", "short"},
    {"V", "void"},
    {"Z", "boolean"}
  };

  private Util() {}

  private static String getBasicType(final String descriptor) {
    for (int i = 0; i < basicTypes.length; ++i) {
      if (basicTypes[i][0].equals(descriptor)) {
        return basicTypes[i][1];
      }
    }

    return null;
  }

  public static String getType(final String descriptor) {
    final Supplier ifBasicOr =
        () ->
            getBasicType(descriptor) != null
                ? getBasicType(descriptor)
                : descriptor.replace('/', '.');
    final Supplier ifLeftBracketOr =
        () ->
            descriptor.charAt(0) == '['
                ? (getType(descriptor.substring(1)) + "[]")
                : ifBasicOr.get();

    return descriptor.charAt(0) == 'L' && descriptor.charAt(descriptor.length() - 1) == ';'
        ? getType(descriptor.substring(1, descriptor.length() - 1))
        : ifLeftBracketOr.get();
  }
}