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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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 com.intellij.codeInsight.highlighting;
import com.intellij.codeInsight.ExceptionUtil;
import com.intellij.featureStatistics.FeatureUsageTracker;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.util.Condition;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.Collection;
/**
* @author yole
*/
public class HighlightExceptionsHandlerFactory extends HighlightUsagesHandlerFactoryBase {
@Override
public HighlightUsagesHandlerBase createHighlightUsagesHandler(@NotNull Editor editor, @NotNull PsiFile file, @NotNull PsiElement target) {
if (target instanceof PsiKeyword) {
PsiElement parent = target.getParent();
if (PsiKeyword.TRY.equals(target.getText()) && parent instanceof PsiTryStatement) {
return createHighlightTryHandler(editor, file, target, parent);
}
if (PsiKeyword.CATCH.equals(target.getText()) && parent instanceof PsiCatchSection) {
return createHighlightCatchHandler(editor, file, target, parent);
}
if (PsiKeyword.THROWS.equals(target.getText())) {
return createThrowsHandler(editor, file, target);
}
}
return null;
}
@Nullable
private static HighlightUsagesHandlerBase createHighlightTryHandler(final Editor editor,
final PsiFile file,
final PsiElement target,
final PsiElement parent) {
final PsiTryStatement tryStatement = (PsiTryStatement)parent;
FeatureUsageTracker.getInstance().triggerFeatureUsed("codeassists.highlight.throws");
final PsiCodeBlock tryBlock = tryStatement.getTryBlock();
if (tryBlock == null) return null;
final Collection<PsiClassType> psiClassTypes = ExceptionUtil.collectUnhandledExceptions(tryBlock, tryBlock);
return new HighlightExceptionsHandler(editor, file, target, psiClassTypes.toArray(new PsiClassType[psiClassTypes.size()]), tryBlock, Condition.TRUE);
}
@Nullable
private static HighlightUsagesHandlerBase createHighlightCatchHandler(final Editor editor,
final PsiFile file,
final PsiElement target,
final PsiElement parent) {
final PsiCatchSection catchSection = (PsiCatchSection)parent;
FeatureUsageTracker.getInstance().triggerFeatureUsed("codeassists.highlight.throws");
PsiTryStatement tryStatement = catchSection.getTryStatement();
final PsiParameter param = catchSection.getParameter();
if (param == null) return null;
final PsiParameter[] catchBlockParameters = tryStatement.getCatchBlockParameters();
final Collection<PsiClassType> allThrownExceptions = ExceptionUtil.collectUnhandledExceptions(tryStatement.getTryBlock(),
tryStatement.getTryBlock());
Condition<PsiType> filter = new Condition<PsiType>() {
@Override
public boolean value(PsiType type) {
for (PsiParameter parameter : catchBlockParameters) {
boolean isAssignable = parameter.getType().isAssignableFrom(type);
if (parameter != param) {
if (isAssignable) return false;
}
else {
return isAssignable;
}
}
return false;
}
};
ArrayList<PsiClassType> filtered = new ArrayList<PsiClassType>();
for (PsiClassType type : allThrownExceptions) {
if (filter.value(type)) filtered.add(type);
}
return new HighlightExceptionsHandler(editor, file, target, filtered.toArray(new PsiClassType[filtered.size()]),
tryStatement.getTryBlock(), filter);
}
@Nullable
private static HighlightUsagesHandlerBase createThrowsHandler(final Editor editor, final PsiFile file, final PsiElement target) {
FeatureUsageTracker.getInstance().triggerFeatureUsed("codeassists.highlight.throws");
PsiElement grand = target.getParent().getParent();
if (!(grand instanceof PsiMethod)) return null;
PsiMethod method = (PsiMethod)grand;
if (method.getBody() == null) return null;
final Collection<PsiClassType> psiClassTypes = ExceptionUtil.collectUnhandledExceptions(method.getBody(), method.getBody());
return new HighlightExceptionsHandler(editor, file, target, psiClassTypes.toArray(new PsiClassType[psiClassTypes.size()]), method.getBody(), Condition.TRUE);
}
}
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