/*
 * 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.pig.parser;

import org.antlr.runtime.IntStream;

public class ParserValidationException extends PigRecognitionException {
    private static final long serialVersionUID = 1L;
    
    private String cause;
    
    private Exception ex;
    
    public ParserValidationException(IntStream input, SourceLocation loc, String cause) {
        super( input, loc );
        this.cause = cause;
    }
    
    public ParserValidationException(IntStream input, SourceLocation loc, Exception ex) {
        super( input, loc );
        this.ex = ex;
    }
    
    public String toString() {
        return msgHeader() + "pig script failed to validate: " + ( ex != null ? ex.toString() : cause  );
    }

    @Override
    public Throwable getCause() {
      return ex;
    };

}