| // Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| package com.android.tools.r8.shaking; |
| |
| public abstract class ProguardNameMatcher { |
| |
| private static final ProguardNameMatcher MATCH_ALL_NAMES = new MatchAllNames(); |
| |
| private ProguardNameMatcher() { |
| |
| } |
| |
| public static ProguardNameMatcher create(String pattern) { |
| if (pattern.equals("*")) { |
| return MATCH_ALL_NAMES; |
| } else if (pattern.contains("*") || pattern.contains("?")) { |
| return new MatchNamePattern(pattern); |
| } else { |
| return new MatchSpecificName(pattern); |
| } |
| } |
| |
| /** |
| * Determines if the proguard name pattern matches the given field or method name. |
| * |
| * @param pattern Proguard name pattern potentially with wildcards: ?, *. |
| * @param name The name to match against. |
| * @return true iff the pattern matches the name. |
| */ |
| public static boolean matchFieldOrMethodName(String pattern, String name) { |
| return matchFieldOrMethodNameImpl(pattern, 0, name, 0); |
| } |
| |
| private static boolean matchFieldOrMethodNameImpl( |
| String pattern, int patternIndex, String name, int nameIndex) { |
| for (int i = patternIndex; i < pattern.length(); i++) { |
| char patternChar = pattern.charAt(i); |
| switch (patternChar) { |
| case '*': |
| // Match the rest of the pattern against the rest of the name. |
| for (int nextNameIndex = nameIndex; nextNameIndex <= name.length(); nextNameIndex++) { |
| if (matchFieldOrMethodNameImpl(pattern, i + 1, name, nextNameIndex)) { |
| return true; |
| } |
| } |
| return false; |
| case '?': |
| if (nameIndex == name.length()) { |
| return false; |
| } |
| nameIndex++; |
| break; |
| default: |
| if (nameIndex == name.length() || patternChar != name.charAt(nameIndex++)) { |
| return false; |
| } |
| break; |
| } |
| } |
| return nameIndex == name.length(); |
| } |
| |
| public abstract boolean matches(String name); |
| |
| private static class MatchAllNames extends ProguardNameMatcher { |
| |
| @Override |
| public boolean matches(String name) { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return "*"; |
| } |
| } |
| |
| private static class MatchNamePattern extends ProguardNameMatcher { |
| |
| private final String pattern; |
| |
| MatchNamePattern(String pattern) { |
| this.pattern = pattern; |
| } |
| |
| @Override |
| public boolean matches(String name) { |
| return matchFieldOrMethodName(pattern, name); |
| } |
| |
| @Override |
| public String toString() { |
| return pattern; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| return o instanceof MatchNamePattern && pattern.equals(((MatchNamePattern) o).pattern); |
| } |
| |
| @Override |
| public int hashCode() { |
| return pattern.hashCode(); |
| } |
| } |
| |
| private static class MatchSpecificName extends ProguardNameMatcher { |
| |
| private final String name; |
| |
| MatchSpecificName(String name) { |
| this.name = name; |
| } |
| |
| @Override |
| public boolean matches(String name) { |
| return this.name.equals(name); |
| } |
| |
| @Override |
| public String toString() { |
| return name; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return o instanceof MatchSpecificName && name.equals(((MatchSpecificName) o).name); |
| } |
| |
| @Override |
| public int hashCode() { |
| return name.hashCode(); |
| } |
| } |
| } |