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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser 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 Lesser General Public License for more details.
*/
package com.github.javaparser;
import java.util.Comparator;
import java.util.Optional;
import static com.github.javaparser.utils.Utils.EOL;
import static com.github.javaparser.utils.Utils.assertNotNull;
/**
* A problem that was encountered during parsing.
*/
public class Problem {
private final String message;
private final TokenRange location;
private final Throwable cause;
public Problem(String message, TokenRange location, Throwable cause) {
assertNotNull(message);
this.message = message;
this.location = location;
this.cause = cause;
}
@Override
public String toString() {
final StringBuilder str = new StringBuilder(getVerboseMessage());
if (cause != null) {
str.append(EOL).append("Problem stacktrace : ").append(EOL);
for (int i = 0; i < cause.getStackTrace().length; i++) {
StackTraceElement ste = cause.getStackTrace()[i];
str.append(" ").append(ste.toString());
if (i + 1 != cause.getStackTrace().length)
str.append(EOL);
}
}
return str.toString();
}
/**
* @return the message that was passed into the constructor.
*/
public String getMessage() {
return message;
}
/**
* @return the message plus location information.
*/
public String getVerboseMessage() {
return getLocation().map(l -> l.getBegin().getRange().map(r -> r.begin.toString()).orElse("(line ?,col ?)") + " " + message).orElse(message);
}
/**
* @return the location that was passed into the constructor.
*/
public Optional<TokenRange> getLocation() {
return Optional.ofNullable(location);
}
/**
* @deprecated use getLocation()
*/
@Deprecated
public Optional<TokenRange> getRange() {
return getLocation();
}
/**
* @return the cause that was passed into the constructor.
*/
public Optional<Throwable> getCause() {
return Optional.ofNullable(cause);
}
/**
* Sorts problems on position.
*/
public static Comparator<Problem> PROBLEM_BY_BEGIN_POSITION = (a, b) -> {
final Optional<Position> aBegin= a.getLocation().flatMap(l -> l.getBegin().getRange().map(r -> r.begin));
final Optional<Position> bBegin = b.getLocation().flatMap(l -> l.getBegin().getRange().map(r -> r.begin));
if (aBegin.isPresent() && bBegin.isPresent()) {
return aBegin.get().compareTo(bBegin.get());
}
if (a.getLocation().isPresent() || b.getLocation().isPresent()) {
if (a.getLocation().isPresent()) {
return 1;
}
return -1;
}
return 0;
};
}
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