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/*
* 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;
}
}
}
});
}
}
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