io.takari.builder.internal.Message Maven / Gradle / Ivy

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// copy&paste from io.takari.incrementalbuild.spi.Message
package io.takari.builder.internal;

import java.io.Serializable;

@SuppressWarnings("serial")
public class Message implements Serializable {

  // no serialVersionUID, want deserialization to fail if state format changes

  public static enum MessageSeverity {
    ERROR, WARNING, INFO
  }

  public final String file;

  public final int line;

  public final int column;

  public final String message;

  public final MessageSeverity severity;

  public final Throwable cause;

  private final int hashCode;

  public Message(String file, int line, int column, String message, MessageSeverity severity,
      Throwable cause) {
    this.file = file;
    this.line = line;
    this.column = column;
    this.message = message;
    this.severity = severity;
    this.cause = cause;
    this.hashCode = _hashCode();
  }

  private int _hashCode() {
    int result = 31;
    result = result * 17 + file.hashCode();
    result = result * 17 + line;
    result = result * 17 + column;
    result = result * 17 + (message != null ? message.hashCode() : 0);
    result = result * 17 + (severity != null ? severity.hashCode() : 0);
    result = result * 17 + (cause != null ? cause.hashCode() : 0);
    return result;
  }

  @Override
  public int hashCode() {
    return hashCode;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (!(obj instanceof Message)) {
      return false;
    }
    Message other = (Message) obj;
    return line == other.line && column == other.column && eq(file, other.file)
        && eq(message, other.message) && eq(severity, other.severity) && eq(cause, other.cause);
  }

  private static  boolean eq(T a, T b) {
    return a != null ? a.equals(b) : b == null;
  }
}