Java tutorial
/** * This file is part of Graylog Pipeline Processor. * * Graylog Pipeline Processor is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Graylog Pipeline Processor is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Graylog Pipeline Processor. If not, see <http://www.gnu.org/licenses/>. */ package org.graylog.plugins.pipelineprocessor.parser.errors; import com.fasterxml.jackson.annotation.JsonIgnore; import com.fasterxml.jackson.annotation.JsonProperty; import org.antlr.v4.runtime.ParserRuleContext; import java.util.Objects; public abstract class ParseError { @JsonProperty private final String type; @JsonIgnore private final ParserRuleContext ctx; protected ParseError(String type, ParserRuleContext ctx) { this.type = type; this.ctx = ctx; } @JsonProperty public int line() { return ctx.getStart().getLine(); } @JsonProperty public int positionInLine() { return ctx.getStart().getCharPositionInLine(); } protected String positionString() { return " in" + " line " + line() + " pos " + positionInLine(); } @Override public boolean equals(Object o) { if (this == o) return true; if (!(o instanceof ParseError)) return false; ParseError that = (ParseError) o; return Objects.equals(type, that.type) && Objects.equals(ctx, that.ctx); } @Override public int hashCode() { return Objects.hash(type, ctx); } }