org.jaitools.jiffle.parser.ErrorHandlingTreeParser Maven / Gradle / Ivy
/*
* Copyright (c) 2011, Michael Bedward. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jaitools.jiffle.parser;
import org.antlr.runtime.RecognizerSharedState;
import org.antlr.runtime.tree.TreeNodeStream;
import org.antlr.runtime.tree.TreeParser;
/**
* A base class for Jiffle tree parsers that want to intercept
* ANTLR error and warning messages.
*
* @author Michael Bedward
* @since 0.1
* @version $Id$
*/
public abstract class ErrorHandlingTreeParser extends TreeParser {
/** Stores error and warning messages. */
protected ParsingErrorReporter errorReporter;
/**
* Constructor.
*
* @param input AST node stream
*/
public ErrorHandlingTreeParser(TreeNodeStream input) {
super(input);
}
/**
* Constructor.
*
* @param input input AST node stream
* @param state recognizer state
*/
public ErrorHandlingTreeParser(TreeNodeStream input, RecognizerSharedState state) {
super(input, state);
}
/**
* Overrides the ANTLR parser method to capture an error message that
* would otherwise be sent to std err.
*
* @param msg the message
*/
@Override
public void emitErrorMessage(String msg) {
if (errorReporter != null) {
errorReporter.addError(msg);
} else {
super.emitErrorMessage(msg);
}
}
/**
* Gets the error reporter object.
*
* @return the error reporter
*/
public ParsingErrorReporter getErrorReporter() {
return errorReporter;
}
/**
* Sets the error reporter.
*
* @param er the error reporter (may be {@code null} if message
* interception is not required).
*/
public void setErrorReporter(ParsingErrorReporter er) {
errorReporter = er;
}
}
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