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/*
* Copyright 2000-2013 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.psi.impl.source;
import com.intellij.lang.ASTNode;
import com.intellij.psi.*;
import com.intellij.psi.impl.java.stubs.JavaStubElementTypes;
import com.intellij.psi.impl.java.stubs.PsiImportListStub;
import com.intellij.psi.impl.source.tree.ElementType;
import com.intellij.psi.impl.source.tree.JavaElementType;
import com.intellij.psi.tree.TokenSet;
import com.intellij.util.ArrayFactory;
import com.intellij.util.containers.HashMap;
import org.jetbrains.annotations.NotNull;
import java.util.Map;
public class PsiImportListImpl extends JavaStubPsiElement<PsiImportListStub> implements PsiImportList {
private volatile Map<String,PsiImportStatement> myClassNameToImportMap = null;
private volatile Map<String,PsiImportStatement> myPackageNameToImportMap = null;
private volatile Map<String,PsiImportStatementBase> myNameToSingleImportMap = null;
private static final PsiImportStatementBase[] EMPTY_ARRAY = new PsiImportStatementBase[0];
private static final ArrayFactory<PsiImportStatementBase> ARRAY_FACTORY = new ArrayFactory<PsiImportStatementBase>() {
@NotNull
@Override
public PsiImportStatementBase[] create(final int count) {
return count == 0 ? EMPTY_ARRAY : new PsiImportStatementBase[count];
}
};
public PsiImportListImpl(final PsiImportListStub stub) {
super(stub, JavaStubElementTypes.IMPORT_LIST);
}
public PsiImportListImpl(final ASTNode node) {
super(node);
}
@Override
protected Object clone() {
PsiImportListImpl clone = (PsiImportListImpl)super.clone();
clone.myClassNameToImportMap = null;
clone.myPackageNameToImportMap = null;
clone.myNameToSingleImportMap = null;
return clone;
}
@Override
public void subtreeChanged() {
myClassNameToImportMap = null;
myPackageNameToImportMap = null;
myNameToSingleImportMap = null;
super.subtreeChanged();
}
private static final TokenSet IMPORT_STATEMENT_BIT_SET = TokenSet.create(JavaElementType.IMPORT_STATEMENT);
private static final TokenSet IMPORT_STATIC_STATEMENT_BIT_SET = TokenSet.create(JavaElementType.IMPORT_STATIC_STATEMENT);
@Override
@NotNull
public PsiImportStatement[] getImportStatements() {
return getStubOrPsiChildren(IMPORT_STATEMENT_BIT_SET, PsiImportStatementImpl.ARRAY_FACTORY);
}
@Override
@NotNull
public PsiImportStaticStatement[] getImportStaticStatements() {
return getStubOrPsiChildren(IMPORT_STATIC_STATEMENT_BIT_SET, PsiImportStaticStatementImpl.ARRAY_FACTORY);
}
@Override
@NotNull
public PsiImportStatementBase[] getAllImportStatements() {
return getStubOrPsiChildren(ElementType.IMPORT_STATEMENT_BASE_BIT_SET, ARRAY_FACTORY);
}
@Override
public PsiImportStatement findSingleClassImportStatement(String name) {
while (true) {
Map<String, PsiImportStatement> map = myClassNameToImportMap;
if (map == null) {
initializeMaps();
}
else {
return map.get(name);
}
}
}
@Override
public PsiImportStatement findOnDemandImportStatement(String name) {
while (true) {
Map<String, PsiImportStatement> map = myPackageNameToImportMap;
if (map == null) {
initializeMaps();
}
else {
return map.get(name);
}
}
}
@Override
public PsiImportStatementBase findSingleImportStatement(String name) {
while (true) {
Map<String, PsiImportStatementBase> map = myNameToSingleImportMap;
if (map == null) {
initializeMaps();
}
else {
return map.get(name);
}
}
}
@Override
public boolean isReplaceEquivalent(PsiImportList otherList) {
return getText().equals(otherList.getText());
}
private void initializeMaps() {
Map<String, PsiImportStatement> classNameToImportMap = new HashMap<String, PsiImportStatement>();
Map<String, PsiImportStatement> packageNameToImportMap = new HashMap<String, PsiImportStatement>();
Map<String, PsiImportStatementBase> nameToSingleImportMap = new HashMap<String, PsiImportStatementBase>();
PsiImportStatement[] imports = getImportStatements();
for (PsiImportStatement anImport : imports) {
String qName = anImport.getQualifiedName();
if (qName == null) continue;
if (anImport.isOnDemand()) {
packageNameToImportMap.put(qName, anImport);
}
else {
classNameToImportMap.put(qName, anImport);
PsiJavaCodeReferenceElement importReference = anImport.getImportReference();
if (importReference == null) continue;
nameToSingleImportMap.put(importReference.getReferenceName(), anImport);
}
}
PsiImportStaticStatement[] importStatics = getImportStaticStatements();
for (PsiImportStaticStatement importStatic : importStatics) {
if (!importStatic.isOnDemand()) {
String referenceName = importStatic.getReferenceName();
if (referenceName != null) {
nameToSingleImportMap.put(referenceName, importStatic);
}
}
}
myClassNameToImportMap = classNameToImportMap;
myPackageNameToImportMap = packageNameToImportMap;
myNameToSingleImportMap = nameToSingleImportMap;
}
@Override
public void accept(@NotNull PsiElementVisitor visitor) {
if (visitor instanceof JavaElementVisitor) {
((JavaElementVisitor)visitor).visitImportList(this);
}
else {
visitor.visitElement(this);
}
}
public String toString() {
return "PsiImportList";
}
}
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