/*
* Copyright 2011-present Greg Shrago
*
* Licensed 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.intellij.grammar.inspection;
import com.intellij.codeInspection.InspectionManager;
import com.intellij.codeInspection.LocalInspectionTool;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.codeInspection.ProblemsHolder;
import com.intellij.psi.PsiFile;
import com.intellij.util.containers.ContainerUtil;
import org.intellij.grammar.psi.BnfFile;
import org.intellij.grammar.psi.BnfRule;
import org.intellij.grammar.psi.impl.GrammarUtil;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
import java.util.Set;
/**
* Created by IntelliJ IDEA.
* Date: 8/29/11
* Time: 1:54 PM
*
* @author Vadim Romansky
*/
public class BnfDuplicateRuleInspection extends LocalInspectionTool {
@Nls
@NotNull
@Override
public String getGroupDisplayName() {
return "Grammar/BNF";
}
@Nls
@NotNull
@Override
public String getDisplayName() {
return "Duplicate rule";
}
@NotNull
@Override
public String getShortName() {
return "BnfDuplicateRuleInspection";
}
public boolean isEnabledByDefault() {
return true;
}
public ProblemDescriptor[] checkFile(@NotNull PsiFile file, @NotNull InspectionManager manager, boolean isOnTheFly) {
ProblemsHolder problemsHolder = new ProblemsHolder(manager, file, isOnTheFly);
checkFile(file, problemsHolder);
return problemsHolder.getResultsArray();
}
private static void checkFile(PsiFile file, ProblemsHolder problemsHolder) {
if (!(file instanceof BnfFile)) return;
BnfFile bnfFile = (BnfFile)file;
Set<BnfRule> rules = ContainerUtil.newLinkedHashSet();
for (BnfRule r : GrammarUtil.bnfTraverser(bnfFile).filter(BnfRule.class)) {
BnfRule t = bnfFile.getRule(r.getName());
if (r != t) {
rules.add(t);
rules.add(r);
}
}
for (BnfRule rule : rules) {
problemsHolder.registerProblem(rule.getId(), "'" + rule.getName() + "' rule is defined more than once");
}
}
}