src/main/java/com/googlesource/gerrit/plugins/analytics/GsonFormatter.java

// Copyright (C) 2016 The Android Open Source Project
//
// 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.googlesource.gerrit.plugins.analytics;

import com.google.gerrit.server.OutputFormat;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import java.io.PrintWriter;
import java.util.stream.Stream;

@Singleton
public class GsonFormatter {
  private GsonBuilder gsonBuilder;

  @Inject
  public GsonFormatter() {
    gsonBuilder = OutputFormat.JSON_COMPACT.newGsonBuilder();
  }

  public <T> void format(Stream<T> values, PrintWriter out) {
    final Gson gson = gsonBuilder.create();

    values.sequential().forEach((T value) -> {
      gson.toJson(value, out);
      out.println();
    });
  }
}