All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.google.gwt.dev.javac.GeneratedClassnameComparator Maven / Gradle / Ivy

/*
 * Copyright 2008 Google Inc.
 *
 * 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 com.google.gwt.dev.javac;

import java.io.Serializable;
import java.util.Comparator;

/**
 * Comparator to sort the compiler-generated classNames so that they can be
 * correlated. Examples of sorting orders by the comparator:
 *
 * 
 * 
    *
  • Foo$1 < Foo$2 < Foo$3 < ... < Foo$10 *
  • Foo$1 < Foo$2 < Foo$1$1 < Foo$1$2 < Foo$2$1 < Foo$2$2 < Foo$2$Baz *
*/ class GeneratedClassnameComparator implements Comparator, Serializable { @Override public int compare(String arg0, String arg1) { String pattern = "\\$"; String splits0[] = arg0.split(pattern); String splits1[] = arg1.split(pattern); if (splits0.length != splits1.length) { return splits0.length - splits1.length; } for (int i = 0; i < splits0.length; i++) { int answer = compareWithoutDollars(splits0[i], splits1[i]); if (answer != 0) { return answer; } } return 0; } /* * 3 cases: (i) both can be converted to integer: compare the integral value. * (ii) only one can be converted to integer: the one with integral value is * lower. (iii) none can be converted to integer: compare the strings. */ private int compareWithoutDollars(String arg0, String arg1) { boolean arg0IsInt = false; boolean arg1IsInt = false; int int0 = 0, int1 = 0; if ((arg0 == null) != (arg1 == null)) { return (arg0 == null) ? -1 : 1; } if (arg0 == null) { return 0; } if (arg0.charAt(0) != '-') { try { int0 = Integer.parseInt(arg0); arg0IsInt = true; } catch (NumberFormatException ex) { // ignored } } if (arg1.charAt(0) != '-') { try { int1 = Integer.parseInt(arg1); arg1IsInt = true; } catch (NumberFormatException ex) { // ignored } } if (arg0IsInt != arg1IsInt) { return arg0IsInt ? -1 : 1; } // now either both are int or both are Strings if (arg0IsInt) { return int0 - int1; } return arg0.compareTo(arg1); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy