| // Copyright 2015 The Bazel Authors. All rights reserved. |
| // |
| // 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.devtools.build.lib.util; |
| |
| import com.google.common.base.Preconditions; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Shim to work around the issue that {@link Pattern} doesn't implement equality. Treats pattern as |
| * a {@link String} for equality-checking purposes. Thus, if two PatternWithEquality objects are |
| * equal, their internal Pattern objects are necessarily equal, although the converse does not hold. |
| */ |
| public final class PatternWithEquality { |
| public final Pattern pattern; |
| |
| public PatternWithEquality(Pattern pattern) { |
| this.pattern = Preconditions.checkNotNull(pattern); |
| } |
| |
| @Override |
| public int hashCode() { |
| return pattern.toString().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return (other instanceof PatternWithEquality) |
| && pattern.toString().equals(((PatternWithEquality) other).pattern.toString()); |
| } |
| } |