org.jetbrains.java.decompiler.modules.renamer.ConverterHelper Maven / Gradle / Ivy

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/*
 * Copyright 2000-2015 JetBrains s.r.o.
 *
 * 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 org.jetbrains.java.decompiler.modules.renamer;

import org.jetbrains.java.decompiler.main.extern.IIdentifierRenamer;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class ConverterHelper implements IIdentifierRenamer {

  private static final Set KEYWORDS = new HashSet(Arrays.asList(
    "abstract", "do", "if", "package", "synchronized", "boolean", "double", "implements", "private", "this", "break", "else", "import",
    "protected", "throw", "byte", "extends", "instanceof", "public", "throws", "case", "false", "int", "return", "transient", "catch",
    "final", "interface", "short", "true", "char", "finally", "long", "static", "try", "class", "float", "native", "strictfp", "void",
    "const", "for", "new", "super", "volatile", "continue", "goto", "null", "switch", "while", "default", "assert", "enum"));

  private int classCounter = 0;
  private int fieldCounter = 0;
  private int methodCounter = 0;
  private final Set setNonStandardClassNames = new HashSet();

  @Override
  public boolean toBeRenamed(Type elementType, String className, String element, String descriptor) {
    String value = elementType == Type.ELEMENT_CLASS ? className : element;
    return value == null || value.length() == 0 || value.length() <= 2 || KEYWORDS.contains(value) || Character.isDigit(value.charAt(0));
  }

  // TODO: consider possible conflicts with not renamed classes, fields and methods!
  // We should get all relevant information here.
  @Override
  public String getNextClassName(String fullName, String shortName) {

    if (shortName == null) {
      return "class_" + (classCounter++);
    }

    int index = 0;
    while (Character.isDigit(shortName.charAt(index))) {
      index++;
    }

    if (index == 0 || index == shortName.length()) {
      return "class_" + (classCounter++);
    }
    else {
      String name = shortName.substring(index);

      if (setNonStandardClassNames.contains(name)) {
        return "Inner" + name + "_" + (classCounter++);
      }
      else {
        setNonStandardClassNames.add(name);
        return "Inner" + name;
      }
    }
  }

  @Override
  public String getNextFieldName(String className, String field, String descriptor) {
    return "field_" + (fieldCounter++);
  }

  @Override
  public String getNextMethodName(String className, String method, String descriptor) {
    return "method_" + (methodCounter++);
  }

  // *****************************************************************************
  // static methods
  // *****************************************************************************

  public static String getSimpleClassName(String fullName) {
    return fullName.substring(fullName.lastIndexOf('/') + 1);
  }

  public static String replaceSimpleClassName(String fullName, String newName) {
    return fullName.substring(0, fullName.lastIndexOf('/') + 1) + newName;
  }
}