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460 lines
22 KiB
Java
460 lines
22 KiB
Java
/*
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* Copyright 2000-2009 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.intellij.codeInsight.completion;
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import com.intellij.codeInsight.*;
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import com.intellij.codeInsight.lookup.*;
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import com.intellij.openapi.util.Key;
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import com.intellij.patterns.ElementPattern;
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import com.intellij.patterns.PsiJavaPatterns;
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import com.intellij.psi.*;
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import com.intellij.psi.filters.ElementExtractorFilter;
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import com.intellij.psi.filters.ElementFilter;
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import com.intellij.psi.filters.GeneratorFilter;
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import com.intellij.psi.filters.OrFilter;
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import com.intellij.psi.filters.getters.*;
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import com.intellij.psi.filters.types.AssignableFromFilter;
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import com.intellij.psi.filters.types.AssignableGroupFilter;
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import com.intellij.psi.filters.types.AssignableToFilter;
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import com.intellij.psi.impl.source.PsiLabelReference;
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import com.intellij.psi.impl.source.resolve.reference.impl.PsiMultiReference;
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import com.intellij.psi.infos.CandidateInfo;
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import com.intellij.psi.javadoc.PsiDocTag;
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import com.intellij.psi.util.PsiTreeUtil;
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import com.intellij.psi.util.PsiUtil;
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import com.intellij.util.Consumer;
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import com.intellij.util.ProcessingContext;
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import com.intellij.util.ReflectionCache;
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import com.intellij.util.SmartList;
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import com.intellij.util.containers.ContainerUtil;
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import gnu.trove.THashSet;
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import gnu.trove.TObjectHashingStrategy;
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import org.jetbrains.annotations.NonNls;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.util.*;
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import static com.intellij.patterns.PlatformPatterns.psiElement;
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import static com.intellij.patterns.PsiJavaPatterns.psiMethod;
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import static com.intellij.patterns.StandardPatterns.*;
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/**
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* @author peter
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*/
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public class JavaSmartCompletionContributor extends CompletionContributor {
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private static final TObjectHashingStrategy<ExpectedTypeInfo> EXPECTED_TYPE_INFO_STRATEGY = new TObjectHashingStrategy<ExpectedTypeInfo>() {
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public int computeHashCode(final ExpectedTypeInfo object) {
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return object.getType().hashCode();
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}
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public boolean equals(final ExpectedTypeInfo o1, final ExpectedTypeInfo o2) {
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return o1.getType().equals(o2.getType());
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}
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};
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private static final ElementExtractorFilter THROWABLES_FILTER = new ElementExtractorFilter(new AssignableFromFilter(CommonClassNames.JAVA_LANG_THROWABLE));
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@NonNls private static final String EXCEPTION_TAG = "exception";
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static final ElementPattern<PsiElement> AFTER_NEW =
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psiElement().afterLeaf(
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psiElement().withText(PsiKeyword.NEW).andNot(
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psiElement().afterLeaf(
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psiElement().withText(PsiKeyword.THROW))));
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static final ElementPattern<PsiElement> AFTER_THROW_NEW = psiElement().afterLeaf(psiElement().withText(PsiKeyword.NEW).afterLeaf(PsiKeyword.THROW));
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private static final OrFilter THROWABLE_TYPE_FILTER = new OrFilter(
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new GeneratorFilter(AssignableGroupFilter.class, new ThrowsListGetter()),
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new AssignableFromFilter(CommonClassNames.JAVA_LANG_THROWABLE));
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public static final ElementPattern<PsiElement> INSIDE_EXPRESSION = or(
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psiElement().withParent(PsiExpression.class).andNot(psiElement().withParent(PsiLiteralExpression.class)),
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psiElement().inside(PsiClassObjectAccessExpression.class),
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psiElement().inside(PsiThisExpression.class),
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psiElement().inside(PsiSuperExpression.class)
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);
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static final ElementPattern<PsiElement> INSIDE_TYPECAST_EXPRESSION = psiElement().withParent(
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psiElement(PsiReferenceExpression.class).afterLeaf(
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psiElement().withText(")").withParent(PsiTypeCastExpression.class)));
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@Nullable
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private static ElementFilter getReferenceFilter(PsiElement element) {
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//throw new foo
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if (AFTER_THROW_NEW.accepts(element)) {
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return new ElementExtractorFilter(THROWABLE_TYPE_FILTER);
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}
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//new xxx.yyy
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if (psiElement().afterLeaf(psiElement().withText(".")).withSuperParent(2, psiElement(PsiNewExpression.class)).accepts(element)) {
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if (((PsiNewExpression)element.getParent().getParent()).getClassReference() == element.getParent()) {
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return new GeneratorFilter(AssignableGroupFilter.class, new ExpectedTypesGetter());
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}
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}
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return null;
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}
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public JavaSmartCompletionContributor() {
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extend(CompletionType.SMART, SmartCastProvider.INSIDE_TYPECAST_TYPE, new SmartCastProvider());
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extend(CompletionType.SMART, SameSignatureCallParametersProvider.IN_CALL_ARGUMENT, new SameSignatureCallParametersProvider());
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extend(CompletionType.SMART, psiElement().afterLeaf(PsiKeyword.INSTANCEOF), new CompletionProvider<CompletionParameters>() {
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protected void addCompletions(@NotNull final CompletionParameters parameters, final ProcessingContext context, @NotNull final CompletionResultSet result) {
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final PsiElement position = parameters.getPosition();
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final PsiType[] leftTypes = InstanceOfLeftPartTypeGetter.getLeftTypes(position);
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final Set<PsiClassType> expectedClassTypes = new LinkedHashSet<PsiClassType>();
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final Set<PsiClass> parameterizedTypes = new THashSet<PsiClass>();
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for (final PsiType type : leftTypes) {
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if (type instanceof PsiClassType) {
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final PsiClassType classType = (PsiClassType)type;
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if (!classType.isRaw()) {
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ContainerUtil.addIfNotNull(classType.resolve(), parameterizedTypes);
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}
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expectedClassTypes.add(classType.rawType());
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}
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}
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JavaInheritorsGetter
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.processInheritors(parameters, expectedClassTypes, result.getPrefixMatcher(), new Consumer<PsiType>() {
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public void consume(PsiType type) {
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final PsiClass psiClass = PsiUtil.resolveClassInType(type);
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if (psiClass == null) return;
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if (expectedClassTypes.contains(type)) return;
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result.addElement(createInstanceofLookupElement(psiClass, parameterizedTypes));
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}
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});
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}
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});
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extend(CompletionType.SMART, psiElement(), new CompletionProvider<CompletionParameters>() {
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protected void addCompletions(@NotNull final CompletionParameters parameters, final ProcessingContext context, @NotNull final CompletionResultSet result) {
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final PsiElement element = parameters.getPosition();
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final PsiReference reference = element.getContainingFile().findReferenceAt(parameters.getOffset());
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if (reference != null) {
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final ElementFilter filter = getReferenceFilter(element);
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if (filter != null) {
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final List<ExpectedTypeInfo> infos = Arrays.asList(getExpectedTypes(parameters));
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for (final LookupElement item : completeReference(element, reference, filter, true, false, parameters, result.getPrefixMatcher())) {
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if (item.getObject() instanceof PsiClass) {
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result.addElement(decorate(LookupElementDecorator.withInsertHandler((LookupItem)item, ConstructorInsertHandler.SMART_INSTANCE), infos));
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}
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}
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}
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else if (INSIDE_TYPECAST_EXPRESSION.accepts(element)) {
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for (final LookupElement item : completeReference(element, reference, new GeneratorFilter(AssignableToFilter.class, new CastTypeGetter()), false, true, parameters,
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result.getPrefixMatcher())) {
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result.addElement(item);
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}
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}
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}
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}
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});
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//method throws clause
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extend(CompletionType.SMART, psiElement().inside(
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psiElement(PsiReferenceList.class).save("refList").withParent(
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psiMethod().withThrowsList(get("refList")))), new CompletionProvider<CompletionParameters>() {
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@Override
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protected void addCompletions(@NotNull CompletionParameters parameters,
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ProcessingContext context,
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@NotNull CompletionResultSet result) {
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final PsiElement element = parameters.getPosition();
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final PsiReference reference = element.getContainingFile().findReferenceAt(parameters.getOffset());
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assert reference != null;
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for (final LookupElement item : completeReference(element, reference, THROWABLES_FILTER, true, false, parameters, result.getPrefixMatcher())) {
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result.addElement(item);
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}
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}
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});
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extend(CompletionType.SMART, INSIDE_EXPRESSION, new ExpectedTypeBasedCompletionProvider() {
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protected void addCompletions(final CompletionParameters params, final CompletionResultSet result, final Collection<ExpectedTypeInfo> _infos) {
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Consumer<LookupElement> noTypeCheck = new Consumer<LookupElement>() {
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public void consume(final LookupElement lookupElement) {
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result.addElement(decorate(lookupElement, _infos));
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}
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};
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THashSet<ExpectedTypeInfo> mergedInfos = new THashSet<ExpectedTypeInfo>(_infos, EXPECTED_TYPE_INFO_STRATEGY);
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List<Runnable> chainedEtc = new ArrayList<Runnable>();
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for (final ExpectedTypeInfo info : mergedInfos) {
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Runnable slowContinuation =
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ReferenceExpressionCompletionContributor.fillCompletionVariants(new JavaSmartCompletionParameters(params, info), noTypeCheck);
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ContainerUtil.addIfNotNull(chainedEtc, slowContinuation);
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}
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addExpectedTypeMembers(params, mergedInfos, true, noTypeCheck);
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for (final ExpectedTypeInfo info : mergedInfos) {
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BasicExpressionCompletionContributor.fillCompletionVariants(new JavaSmartCompletionParameters(params, info), new Consumer<LookupElement>() {
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@Override
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public void consume(LookupElement lookupElement) {
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final TypedLookupItem typed = lookupElement.as(TypedLookupItem.CLASS_CONDITION_KEY);
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if (typed != null) {
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final PsiType psiType = typed.getType();
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if (psiType != null && info.getType().isAssignableFrom(psiType)) {
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result.addElement(decorate(lookupElement, _infos));
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}
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}
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}
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}, result.getPrefixMatcher());
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}
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for (Runnable runnable : chainedEtc) {
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runnable.run();
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}
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final boolean searchInheritors = params.getInvocationCount() > 1;
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if (searchInheritors) {
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addExpectedTypeMembers(params, mergedInfos, false, noTypeCheck);
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}
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}
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});
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extend(CompletionType.SMART, or(
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PsiJavaPatterns.psiElement().withParent(PsiNameValuePair.class),
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PsiJavaPatterns.psiElement().withSuperParent(2, PsiNameValuePair.class)), new CompletionProvider<CompletionParameters>() {
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public void addCompletions(@NotNull final CompletionParameters parameters, final ProcessingContext context, @NotNull final CompletionResultSet result) {
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final PsiElement element = parameters.getPosition();
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final ElementPattern<? extends PsiElement> leftNeighbor = PsiJavaPatterns.psiElement().afterLeaf(PsiJavaPatterns.psiElement().withText("."));
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final boolean needQualify = leftNeighbor.accepts(element);
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for (final PsiType type : ExpectedTypesGetter.getExpectedTypes(element, false)) {
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final PsiClass psiClass = PsiUtil.resolveClassInType(type);
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if (psiClass != null && psiClass.isAnnotationType()) {
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final LookupItem item = JavaClassNameCompletionContributor.createClassLookupItem(psiClass, true);
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if (needQualify) JavaCompletionUtil.qualify(item);
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result.addElement(item);
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}
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}
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}
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});
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extend(CompletionType.SMART, psiElement().inside(
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psiElement(PsiDocTag.class).withName(
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string().oneOf(PsiKeyword.THROWS, EXCEPTION_TAG))), new CompletionProvider<CompletionParameters>() {
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public void addCompletions(@NotNull final CompletionParameters parameters, final ProcessingContext context, @NotNull final CompletionResultSet result) {
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final PsiElement element = parameters.getPosition();
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final Set<PsiClass> throwsSet = new HashSet<PsiClass>();
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final PsiMethod method = PsiTreeUtil.getContextOfType(element, PsiMethod.class, true);
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if(method != null){
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for (PsiClassType ref : method.getThrowsList().getReferencedTypes()) {
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final PsiClass exception = ref.resolve();
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if (exception != null && throwsSet.add(exception)) {
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result.addElement(TailTypeDecorator.withTail(new JavaPsiClassReferenceElement(exception), TailType.HUMBLE_SPACE_BEFORE_WORD));
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}
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}
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}
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}
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});
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final Key<PsiTryStatement> tryKey = Key.create("try");
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extend(CompletionType.SMART, psiElement().afterLeaf(
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psiElement().withText("("))
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.withSuperParent(3, psiElement(PsiCatchSection.class).withParent(
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psiElement(PsiTryStatement.class).save(tryKey))), new CompletionProvider<CompletionParameters>() {
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protected void addCompletions(@NotNull final CompletionParameters parameters, final ProcessingContext context, @NotNull final CompletionResultSet result) {
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final PsiCodeBlock tryBlock = context.get(tryKey).getTryBlock();
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if (tryBlock == null) return;
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for (final PsiClassType type : ExceptionUtil.getThrownExceptions(tryBlock.getStatements())) {
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result.addElement(TailTypeDecorator.withTail(PsiTypeLookupItem.createLookupItem(type, tryBlock).setInsertHandler(new DefaultInsertHandler()), TailType.HUMBLE_SPACE_BEFORE_WORD));
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}
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}
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});
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extend(CompletionType.SMART, psiElement().inside(psiElement(PsiReferenceParameterList.class)), new TypeArgumentCompletionProvider());
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extend(CompletionType.SMART, AFTER_NEW, new JavaInheritorsGetter(ConstructorInsertHandler.SMART_INSTANCE));
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extend(CompletionType.SMART, psiElement().afterLeaf(PsiKeyword.BREAK, PsiKeyword.CONTINUE), new CompletionProvider<CompletionParameters>() {
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@Override
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protected void addCompletions(@NotNull CompletionParameters parameters,
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ProcessingContext context,
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@NotNull CompletionResultSet result) {
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PsiReference ref = parameters.getPosition().getContainingFile().findReferenceAt(parameters.getOffset());
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if (ref instanceof PsiLabelReference) {
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JavaCompletionContributor.processLabelReference(result, (PsiLabelReference)ref);
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}
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}
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});
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}
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private static void addExpectedTypeMembers(CompletionParameters params,
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THashSet<ExpectedTypeInfo> mergedInfos,
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boolean quick,
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Consumer<LookupElement> consumer) {
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PsiElement position = params.getPosition();
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if (!BasicExpressionCompletionContributor.AFTER_DOT.accepts(position)) {
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for (ExpectedTypeInfo info : mergedInfos) {
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new JavaMembersGetter(info.getType(), position).addMembers(params, !quick, consumer);
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if (!info.getDefaultType().equals(info.getType())) {
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new JavaMembersGetter(info.getDefaultType(), position).addMembers(params, !quick, consumer);
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}
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}
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}
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}
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@Override
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public void fillCompletionVariants(CompletionParameters parameters, CompletionResultSet result) {
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super.fillCompletionVariants(parameters, JavaCompletionSorting.addJavaSorting(parameters, result));
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}
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public static SmartCompletionDecorator decorate(LookupElement lookupElement, Collection<ExpectedTypeInfo> infos) {
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LookupItem item = lookupElement.as(LookupItem.CLASS_CONDITION_KEY);
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if (item != null && item.getInsertHandler() == null) {
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item.setInsertHandler(DefaultInsertHandler.NO_TAIL_HANDLER);
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}
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return new SmartCompletionDecorator(lookupElement, infos);
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}
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private static LookupElement createInstanceofLookupElement(PsiClass psiClass, Set<PsiClass> toWildcardInheritors) {
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final PsiTypeParameter[] typeParameters = psiClass.getTypeParameters();
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if (typeParameters.length > 0) {
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for (final PsiClass parameterizedType : toWildcardInheritors) {
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if (psiClass.isInheritor(parameterizedType, true)) {
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PsiSubstitutor substitutor = PsiSubstitutor.EMPTY;
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final PsiWildcardType wildcard = PsiWildcardType.createUnbounded(psiClass.getManager());
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for (final PsiTypeParameter typeParameter : typeParameters) {
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substitutor = substitutor.put(typeParameter, wildcard);
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}
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final PsiElementFactory factory = JavaPsiFacade.getElementFactory(psiClass.getProject());
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return PsiTypeLookupItem.createLookupItem(factory.createType(psiClass, substitutor), psiClass);
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}
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}
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}
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return new JavaPsiClassReferenceElement(psiClass);
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}
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@NotNull
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public static ExpectedTypeInfo[] getExpectedTypes(final CompletionParameters parameters) {
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final PsiElement position = parameters.getPosition();
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if (psiElement().withParent(psiElement(PsiReferenceExpression.class).withParent(PsiThrowStatement.class)).accepts(position)) {
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final PsiElementFactory factory = JavaPsiFacade.getInstance(position.getProject()).getElementFactory();
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final PsiClassType classType = factory
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.createTypeByFQClassName(CommonClassNames.JAVA_LANG_RUNTIME_EXCEPTION, position.getResolveScope());
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final List<ExpectedTypeInfo> result = new SmartList<ExpectedTypeInfo>();
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result.add(new ExpectedTypeInfoImpl(classType, ExpectedTypeInfo.TYPE_OR_SUBTYPE, 0, classType, TailType.SEMICOLON));
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final PsiMethod method = PsiTreeUtil.getContextOfType(position, PsiMethod.class, true);
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if (method != null) {
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for (final PsiClassType type : method.getThrowsList().getReferencedTypes()) {
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result.add(new ExpectedTypeInfoImpl(type, ExpectedTypeInfo.TYPE_OR_SUBTYPE, 0, type, TailType.SEMICOLON));
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}
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}
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return result.toArray(new ExpectedTypeInfo[result.size()]);
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}
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PsiExpression expression = PsiTreeUtil.getContextOfType(position, PsiExpression.class, true);
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if (expression == null) return ExpectedTypeInfo.EMPTY_ARRAY;
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return ExpectedTypesProvider.getExpectedTypes(expression, true, parameters.getCompletionType() == CompletionType.SMART, false);
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}
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static Set<LookupElement> completeReference(final PsiElement element,
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PsiReference reference,
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final ElementFilter filter,
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final boolean acceptClasses,
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final boolean acceptMembers,
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CompletionParameters parameters, @Nullable final PrefixMatcher matcher) {
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if (reference instanceof PsiMultiReference) {
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reference = ContainerUtil.findInstance(((PsiMultiReference) reference).getReferences(), PsiJavaReference.class);
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}
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if (reference instanceof PsiJavaReference) {
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final PsiJavaReference javaReference = (PsiJavaReference)reference;
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return JavaCompletionUtil.processJavaReference(element, javaReference, new ElementFilter() {
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public boolean isAcceptable(Object element, PsiElement context) {
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return filter.isAcceptable(element, context);
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}
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public boolean isClassAcceptable(Class hintClass) {
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if (ReflectionCache.isAssignable(PsiClass.class, hintClass)) {
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return acceptClasses;
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}
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if (ReflectionCache.isAssignable(PsiVariable.class, hintClass) ||
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ReflectionCache.isAssignable(PsiMethod.class, hintClass) ||
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ReflectionCache.isAssignable(CandidateInfo.class, hintClass)) {
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return acceptMembers;
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}
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return false;
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}
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}, true, parameters.getInvocationCount() <= 1, matcher, parameters);
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}
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return Collections.emptySet();
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}
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@Override
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public void beforeCompletion(@NotNull CompletionInitializationContext context) {
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if (context.getCompletionType() != CompletionType.SMART) {
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return;
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}
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if (!context.getEditor().getSelectionModel().hasSelection()) {
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final PsiFile file = context.getFile();
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PsiElement element = file.findElementAt(context.getStartOffset());
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if (element instanceof PsiIdentifier) {
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element = element.getParent();
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while (element instanceof PsiJavaCodeReferenceElement || element instanceof PsiCall ||
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element instanceof PsiThisExpression || element instanceof PsiSuperExpression ||
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element instanceof PsiTypeElement ||
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element instanceof PsiClassObjectAccessExpression) {
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int newEnd = element.getTextRange().getEndOffset();
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if (element instanceof PsiMethodCallExpression) {
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newEnd = ((PsiMethodCallExpression)element).getMethodExpression().getTextRange().getEndOffset();
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}
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else if (element instanceof PsiNewExpression) {
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final PsiJavaCodeReferenceElement classReference = ((PsiNewExpression)element).getClassReference();
|
|
if (classReference != null) {
|
|
newEnd = classReference.getTextRange().getEndOffset();
|
|
}
|
|
}
|
|
context.setReplacementOffset(newEnd);
|
|
element = element.getParent();
|
|
}
|
|
}
|
|
}
|
|
|
|
PsiElement lastElement = context.getFile().findElementAt(context.getStartOffset() - 1);
|
|
if (lastElement != null && lastElement.getText().equals("(")) {
|
|
final PsiElement parent = lastElement.getParent();
|
|
if (parent instanceof PsiTypeCastExpression) {
|
|
context.setDummyIdentifier("");
|
|
return;
|
|
}
|
|
if (parent instanceof PsiParenthesizedExpression) {
|
|
context.setDummyIdentifier("xxx)yyy "); // to handle type cast
|
|
return;
|
|
}
|
|
}
|
|
context.setDummyIdentifier("xxx");
|
|
}
|
|
}
|