| /* |
| * Copyright 2000-2009 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.completion; |
| |
| import com.intellij.codeInsight.ExpectedTypeInfo; |
| import com.intellij.codeInsight.lookup.LookupItem; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.psi.PsiKeyword; |
| import com.intellij.psi.PsiPrimitiveType; |
| import com.intellij.psi.PsiType; |
| |
| import java.util.Collection; |
| import java.util.LinkedHashSet; |
| |
| import static com.intellij.patterns.PsiJavaPatterns.psiElement; |
| import static com.intellij.patterns.StandardPatterns.and; |
| import static com.intellij.patterns.StandardPatterns.not; |
| |
| /** |
| * @author peter |
| */ |
| public class NullSmartCompletionContributor extends CompletionContributor{ |
| public NullSmartCompletionContributor() { |
| extend(CompletionType.SMART, and(JavaSmartCompletionContributor.INSIDE_EXPRESSION, |
| not(psiElement().afterLeaf("."))), new ExpectedTypeBasedCompletionProvider() { |
| @Override |
| protected void addCompletions(final CompletionParameters parameters, |
| final CompletionResultSet result, final Collection<ExpectedTypeInfo> infos) { |
| if (!StringUtil.startsWithChar(result.getPrefixMatcher().getPrefix(), 'n')) { |
| return; |
| } |
| |
| LinkedHashSet<CompletionResult> results = result.runRemainingContributors(parameters, true); |
| for (CompletionResult completionResult : results) { |
| if (completionResult.isStartMatch()) { |
| return; |
| } |
| } |
| |
| for (final ExpectedTypeInfo info : infos) { |
| if (!(info.getType() instanceof PsiPrimitiveType)) { |
| final LookupItem item = (LookupItem)BasicExpressionCompletionContributor.createKeywordLookupItem(parameters.getPosition(), PsiKeyword.NULL); |
| item.setAttribute(LookupItem.TYPE, PsiType.NULL); |
| result.addElement(JavaSmartCompletionContributor.decorate(item, infos)); |
| return; |
| } |
| } |
| } |
| }); |
| } |
| |
| } |