| /* |
| * 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.openapi.util.Conditions; |
| 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, Conditions.<PsiType>alwaysTrue()); |
| } |
| |
| @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(), Conditions.<PsiType>alwaysTrue()); |
| } |
| } |