org.apache.tajo.engine.parser.SQLParseError.java Source code

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Here is the source code for org.apache.tajo.engine.parser.SQLParseError.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.tajo.engine.parser;

import org.antlr.v4.runtime.Token;
import org.apache.commons.lang.StringUtils;

public class SQLParseError extends RuntimeException {
    private String header;
    private String errorLine;
    private int charPositionInLine;
    private int line;
    private Token offendingToken;
    private String detailedMessage;

    public SQLParseError(Token offendingToken, int line, int charPositionInLine, String msg, String errorLine) {
        super(msg);
        this.offendingToken = offendingToken;
        this.charPositionInLine = charPositionInLine;
        this.line = line;
        this.errorLine = errorLine;
        this.header = msg;
    }

    @Override
    public String getMessage() {
        if (detailedMessage == null) {
            if (offendingToken != null) {
                detailedMessage = getDetailedMessageWithLocation();
            } else {
                StringBuilder sb = new StringBuilder();
                sb.append("ERROR: ").append(header).append("\n");
                sb.append("LINE: ").append(errorLine);
                detailedMessage = sb.toString();
            }
        }

        return detailedMessage;
    }

    public String getMessageHeader() {
        return this.header;
    }

    private String getDetailedMessageWithLocation() {
        StringBuilder sb = new StringBuilder();
        int displayLimit = 80;
        String queryPrefix = "LINE " + line + ":" + charPositionInLine + " ";
        String prefixPadding = StringUtils.repeat(" ", queryPrefix.length());
        String locationString;

        int tokenLength = offendingToken.getStopIndex() - offendingToken.getStartIndex() + 1;
        if (tokenLength > 0) {
            locationString = StringUtils.repeat(" ", charPositionInLine) + StringUtils.repeat("^", tokenLength);
        } else {
            locationString = StringUtils.repeat(" ", charPositionInLine) + "^";
        }

        sb.append("ERROR: ").append(header).append("\n");
        sb.append(queryPrefix);

        if (errorLine.length() > displayLimit) {
            int padding = (displayLimit / 2);

            String ellipsis = " ... ";
            int startPos = locationString.length() - padding - 1;
            if (startPos <= 0) {
                startPos = 0;
                sb.append(errorLine.substring(startPos, displayLimit)).append(ellipsis).append("\n");
                sb.append(prefixPadding).append(locationString);
            } else if (errorLine.length() - (locationString.length() + padding) <= 0) {
                startPos = errorLine.length() - displayLimit - 1;
                sb.append(ellipsis).append(errorLine.substring(startPos)).append("\n");
                sb.append(prefixPadding).append(StringUtils.repeat(" ", ellipsis.length()))
                        .append(locationString.substring(startPos));
            } else {
                sb.append(ellipsis).append(errorLine.substring(startPos, startPos + displayLimit)).append(ellipsis)
                        .append("\n");
                sb.append(prefixPadding).append(StringUtils.repeat(" ", ellipsis.length()))
                        .append(locationString.substring(startPos));
            }
        } else {
            sb.append(errorLine).append("\n");
            sb.append(prefixPadding).append(locationString);
        }
        return sb.toString();
    }
}