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Declarative Machine Learning
/*
* 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.sysml.parser.antlr4;
import org.antlr.v4.runtime.BaseErrorListener;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.Recognizer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.sysml.api.DMLScript;
import java.util.Stack;
public class DmlSyntacticErrorListener {
private static final Log LOG = LogFactory.getLog(DMLScript.class.getName());
public static class CustomDmlErrorListener extends BaseErrorListener {
private boolean atleastOneError = false;
private Stack currentFileName = new Stack();
public void pushCurrentFileName(String currentFilePath) {
currentFileName.push(currentFilePath);
}
public String peekFileName() {
return currentFileName.peek();
}
public String popFileName() {
return currentFileName.pop();
}
public void validationError(int line, int charPositionInLine, String msg) {
try {
setAtleastOneError(true);
// Print error messages with file name
if(currentFileName == null || currentFileName.empty()) {
LOG.error("line "+line+":"+charPositionInLine+" "+msg);
}
else {
String fileName = currentFileName.peek();
LOG.error(fileName + " line "+line+":"+charPositionInLine+" "+msg);
}
}
catch(Exception e1) {
LOG.error("ERROR: while customizing error message:" + e1);
}
}
public void validationWarning(int line, int charPositionInLine, String msg) {
try {
//atleastOneError = true; ---> not an error, just warning
// Print error messages with file name
if(currentFileName == null || currentFileName.empty())
LOG.warn("line "+line+":"+charPositionInLine+" "+msg);
else {
String fileName = currentFileName.peek();
LOG.warn(fileName + " line "+line+":"+charPositionInLine+" "+msg);
}
}
catch(Exception e1) {
LOG.warn("ERROR: while customizing error message:" + e1);
}
}
@Override
public void syntaxError(Recognizer recognizer, Object offendingSymbol,
int line, int charPositionInLine,
String msg, RecognitionException e)
{
try {
setAtleastOneError(true);
// Print error messages with file name
if(currentFileName == null || currentFileName.empty())
LOG.error("line "+line+":"+charPositionInLine+" "+msg);
else {
String fileName = currentFileName.peek();
LOG.error(fileName + " line "+line+":"+charPositionInLine+" "+msg);
}
}
catch(Exception e1) {
LOG.error("ERROR: while customizing error message:" + e1);
}
}
public boolean isAtleastOneError() {
return atleastOneError;
}
public void setAtleastOneError(boolean atleastOneError) {
this.atleastOneError = atleastOneError;
}
}
}