org.seimicrawler.xpath.exception.DoFailOnErrorHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of JsoupXpath Show documentation

一个非常好用而且强大的基于xpath的html解析器。html的DOM树生成依赖Jsoup。Lexer 和 Parser基于Antlr4,支持完备的W3C XPATH 1.0标准语法，W3C规范：http://www.w3.org/TR/1999/REC-xpath-19991116。

There is a newer version: 2.5.3

Show newest version

package org.seimicrawler.xpath.exception;

import org.antlr.v4.runtime.DefaultErrorStrategy;
import org.antlr.v4.runtime.InputMismatchException;
import org.antlr.v4.runtime.Parser;
import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.Token;
import org.antlr.v4.runtime.misc.ParseCancellationException;

/**
 * 如果语法解析异常，直接抛出并终止解析
 * @author github.com/zhegexiaohuozi [email protected]
 * @since 2018/3/23.
 */
public class DoFailOnErrorHandler extends DefaultErrorStrategy {

    @Override
    public void recover(Parser recognizer, RecognitionException e) {
        for (ParserRuleContext context = recognizer.getContext(); context != null; context = context.getParent()) {
            context.exception = e;
        }
        throw new ParseCancellationException(e);
    }

    @Override
    public Token recoverInline(Parser recognizer) throws RecognitionException {
        InputMismatchException e = new InputMismatchException(recognizer);
        for (ParserRuleContext context = recognizer.getContext(); context != null; context = context.getParent()) {
            context.exception = e;
        }
        throw new ParseCancellationException(e);
    }
}