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/*
* SonarQube, open source software quality management tool.
* Copyright (C) 2008-2014 SonarSource
* mailto:contact AT sonarsource DOT com
*
* SonarQube is free software; you can redistribute it and/or
* modify it under the terms of 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.
*
* SonarQube 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.batch.highlighting;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import com.google.common.collect.Ordering;
import org.slf4j.LoggerFactory;
import javax.annotation.Nullable;
import java.util.Collection;
import java.util.List;
import static com.google.common.collect.Lists.newArrayList;
/**
* @since 3.6
*/
public class SyntaxHighlightingDataBuilder {
private List<SyntaxHighlightingRule> syntaxHighlightingRuleSet;
public SyntaxHighlightingDataBuilder() {
syntaxHighlightingRuleSet = newArrayList();
}
public SyntaxHighlightingDataBuilder registerHighlightingRule(int startOffset, int endOffset, String typeOfText) {
if (ruleConflictsWithExistingRules(startOffset, endOffset)) {
String errorMsg = String.format("Cannot register highlighting rule for characters from %s to %s as it " +
"overlaps at least one existing rule", startOffset, endOffset);
LoggerFactory.getLogger(SyntaxHighlightingDataBuilder.class).error(errorMsg);
throw new UnsupportedOperationException(errorMsg);
}
SyntaxHighlightingRule syntaxHighlightingRule = SyntaxHighlightingRule.create(startOffset, endOffset,
typeOfText);
this.syntaxHighlightingRuleSet.add(syntaxHighlightingRule);
return this;
}
public SyntaxHighlightingData build() {
return new SyntaxHighlightingData(getSortedRules());
}
private boolean ruleConflictsWithExistingRules(final int startOffset, final int endOffset) {
Collection<SyntaxHighlightingRule> conflictingRules = Collections2
.filter(syntaxHighlightingRuleSet, new Predicate<SyntaxHighlightingRule>() {
@Override
public boolean apply(@Nullable SyntaxHighlightingRule syntaxHighlightingRule) {
if (syntaxHighlightingRule != null) {
boolean overlapsStartBoundary = startOffset < syntaxHighlightingRule.getStartPosition()
&& endOffset >= syntaxHighlightingRule.getStartPosition() + 1
&& endOffset < syntaxHighlightingRule.getEndPosition();
boolean overlapsEndBoundary = startOffset > syntaxHighlightingRule.getStartPosition()
&& startOffset < syntaxHighlightingRule.getEndPosition()
&& endOffset > syntaxHighlightingRule.getEndPosition();
return overlapsStartBoundary || overlapsEndBoundary;
}
return false;
}
});
return !conflictingRules.isEmpty();
}
@VisibleForTesting
public List<SyntaxHighlightingRule> getSortedRules() {
Ordering<SyntaxHighlightingRule> ruleOrdering = new Ordering<SyntaxHighlightingRule>() {
@Override
public int compare(@Nullable SyntaxHighlightingRule left,
@Nullable SyntaxHighlightingRule right) {
int result;
if (left != null && right != null) {
result = left.getStartPosition() - right.getStartPosition();
if (result == 0) {
result = left.getEndPosition() - right.getEndPosition();
}
return result;
}
return left != null ? 1 : -1;
}
};
return ruleOrdering.sortedCopy(syntaxHighlightingRuleSet);
}
}
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