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// Copyright 2019 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.common.options;
import com.google.auto.value.AutoValue;
import com.google.common.base.Preconditions;
import java.util.regex.Pattern;
/**
* Option class wrapping a {@link Pattern class}. We wrap the {@link Pattern} class instance since
* it uses reference equality, which breaks the assumption of {@link Converter} that {@code
* converter.convert(sameString).equals(converter.convert(sameString)}.
*
* <p>Please note that the equality implementation is based solely on the input regex, therefore
* patterns expressing the same intent with different regular expressions (e.g. {@code "a"} and
* {@code "[a]"} will not be treated as equal.
*/
@AutoValue
public abstract class RegexPatternOption {
static RegexPatternOption create(Pattern regexPattern) {
return new AutoValue_RegexPatternOption(Preconditions.checkNotNull(regexPattern));
}
public abstract Pattern regexPattern();
@Override
public final boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof RegexPatternOption)) {
return false;
}
RegexPatternOption otherOption = (RegexPatternOption) other;
return otherOption.regexPattern().pattern().equals(regexPattern().pattern());
}
@Override
public final int hashCode() {
return regexPattern().pattern().hashCode();
}
}