com.github.mariusdw.sqlsim.validator.sqlite.SqLiteValidator.java Source code

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Here is the source code for com.github.mariusdw.sqlsim.validator.sqlite.SqLiteValidator.java

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/*
 * Copyright (C) 2017 Marius de Wit
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.github.mariusdw.sqlsim.validator.sqlite;

import com.github.mariusdw.sqlsim.validator.IValidator;
import com.github.mariusdw.sqlsim.validator.ValidationException;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.List;
import org.antlr.v4.runtime.ANTLRErrorListener;
import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.Parser;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.Recognizer;
import org.antlr.v4.runtime.atn.ATNConfigSet;
import org.antlr.v4.runtime.dfa.DFA;

/**
 *
 * @author Marius de Wit
 */
public class SqLiteValidator implements IValidator {

    @Override
    public void validate(String query) throws ValidationException {
        SQLiteLexer lexer = new SQLiteLexer(new ANTLRInputStream(query));
        SQLiteParser parser = new SQLiteParser(new CommonTokenStream(lexer));
        List<String> errorStrs = new ArrayList<>(1);
        ANTLRErrorListener listener = new ANTLRErrorListener() {
            @Override
            public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line,
                    int charPositionInLine, String msg, RecognitionException e) {

                String newMsg = "Error [line:" + line + "|char:" + charPositionInLine + "] " + msg;
                if (errorStrs.size() > 0) {
                    newMsg += "\n" + errorStrs.get(0);
                    errorStrs.set(0, newMsg);
                } else {
                    errorStrs.add(newMsg);
                }

            }

            @Override
            public void reportAmbiguity(Parser parser, DFA dfa, int i, int i1, boolean bln, BitSet bitset,
                    ATNConfigSet atncs) {
                //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void reportAttemptingFullContext(Parser parser, DFA dfa, int i, int i1, BitSet bitset,
                    ATNConfigSet atncs) {
                //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

            @Override
            public void reportContextSensitivity(Parser parser, DFA dfa, int i, int i1, int i2,
                    ATNConfigSet atncs) {
                //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
            }

        };
        parser.addErrorListener(listener);

        try {
            parser.parse();
            if (errorStrs.size() > 0) {
                throw new ValidationException("Validation error: " + errorStrs.get(0));
            }
        } catch (RecognitionException e) {
            throw new ValidationException("Validation error:", e);
        }
    }
}