content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.crdt.primitives;
  
  import io.activej.common.Checks;
  import io.activej.serializer.BinaryInput;
  import io.activej.serializer.BinaryOutput;
  import io.activej.serializer.BinarySerializer;
  
  import java.util.Arrays;
  
  import static io.activej.common.Checks.checkArgument;
  import static java.lang.Math.max;
  
  public final class GCounterLong implements CrdtMergable<GCounterLong> {
  	private static final boolean CHECKS = Checks.isEnabled(GCounterLong.class);
  
  	public static final BinarySerializer<GCounterLong> SERIALIZER = new Serializer();
  
  	private final long[] state;
  
  	private GCounterLong(long[] state) {
  		this.state = state;
  	}
  
  	public GCounterLong(int n) {
  		this(new long[n]);
  	}
  
  	public void increment(int id) {
  		state[id]++;
  	}
  
  	public long value() {
  		long v = 0;
  		for (long c : state) {
  			v += c;
  		}
  		return v;
  	}
  
  	@Override
  	public GCounterLong merge(GCounterLong other) {
  		if (CHECKS) checkArgument(state.length == other.state.length);
  		long[] newState = new long[state.length];
  		for (int i = 0; i < newState.length; i++) {
  			newState[i] = max(state[i], other.state[i]);
  		}
  		return new GCounterLong(newState);
  	}
  
  	@Override
  	public boolean equals(Object o) {
  		if (this == o) return true;
  		if (o == null || getClass() != o.getClass()) return false;
  		return Arrays.equals(state, ((GCounterLong) o).state);
  	}
  
  	@Override
  	public int hashCode() {
  		return Arrays.hashCode(state);
  	}
  
  	@Override
  	public String toString() {
  		return Long.toString(value());
  	}
  
  	public static class Serializer implements BinarySerializer<GCounterLong> {
  		@Override
  		public void encode(BinaryOutput out, GCounterLong item) {
  			long[] state = item.state;
  			out.writeVarInt(state.length);
  			for (long c : state) {
  				out.writeLong(c);
  			}
  		}
  
  		@Override
  		public GCounterLong decode(BinaryInput in) {
  			long[] state = new long[in.readVarInt()];
  			for (int i = 0; i < state.length; i++) {
  				state[i] = in.readLong();
  			}
  			return new GCounterLong(state);
  		}
  	}
  }
  