jetbrick.template.parser.JetTemplateErrorListener.java Source code

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Here is the source code for jetbrick.template.parser.JetTemplateErrorListener.java

Source

/**
 * jetbrick-template
 * http://subchen.github.io/jetbrick-template/
 *
 * Copyright 2010-2013 Guoqiang Chen. All rights reserved.
 * Email: subchen@gmail.com
 *
 * 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 jetbrick.template.parser;

import jetbrick.template.utils.StringUtils;
import org.antlr.v4.runtime.*;

public class JetTemplateErrorListener extends BaseErrorListener {

    @Override
    public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine,
            String msg, RecognitionException e) {
        CommonTokenStream tokens = (CommonTokenStream) recognizer.getInputStream();
        String input = tokens.getTokenSource().getInputStream().toString();
        String[] sourceLines = input.split("\r?\n", -1);
        Token offendingToken = (Token) offendingSymbol;

        StringBuilder sb = new StringBuilder(128);
        sb.append("Template parse failed.\n");
        sb.append(recognizer.getInputStream().getSourceName());
        sb.append(':');
        sb.append(line);
        sb.append("\nmessage: ");
        sb.append(msg);
        sb.append('\n');
        sb.append(StringUtils.getPrettyError(sourceLines, line, charPositionInLine + 1,
                offendingToken.getStartIndex(), offendingToken.getStopIndex(), 5));

        if (e != null) {
            throw new SyntaxErrorException(sb.toString(), e);
        } else {
            throw new SyntaxErrorException(sb.toString());
        }
    }
}