// Copyright 2018 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.skyframe.serialization.serializers;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
import java.util.regex.Pattern;

/** Serializer for {@link Pattern}. */
class PatternSerializer extends Serializer<Pattern> {

  PatternSerializer() {
    setImmutable(true);
  }

  @Override
  public void write(Kryo unusedKryo, Output output, Pattern pattern) {
    output.writeString(pattern.pattern());
    output.writeInt(pattern.flags(), true);
  }

  @Override
  public Pattern read(Kryo unusedKryo, Input input, Class<Pattern> patternClass) {
    return Pattern.compile(input.readString(), input.readInt(true));
  }

  static void registerSerializers(Kryo kryo) {
    kryo.register(Pattern.class, new PatternSerializer());
  }
}