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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;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.project.DumbAware;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElementFinder;
import com.intellij.psi.PsiManager;
import com.intellij.psi.PsiPackage;
import com.intellij.psi.impl.file.PsiPackageImpl;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.util.containers.HashMap;
import org.jetbrains.annotations.NotNull;
import java.util.Map;
/**
* @author yole
*/
public class PackagePrefixElementFinder extends PsiElementFinder implements DumbAware {
private final Project myProject;
private final PackagePrefixIndex myPackagePrefixIndex;
public PackagePrefixElementFinder(Project project) {
myProject = project;
myPackagePrefixIndex = new PackagePrefixIndex(project);
}
@Override
public PsiClass findClass(@NotNull String qualifiedName, @NotNull GlobalSearchScope scope) {
return null;
}
@NotNull
@Override
public PsiClass[] findClasses(@NotNull String qualifiedName, @NotNull GlobalSearchScope scope) {
return PsiClass.EMPTY_ARRAY;
}
@Override
public PsiPackage findPackage(@NotNull String qualifiedName) {
if (packagePrefixExists(qualifiedName)) {
return new PsiPackageImpl(PsiManager.getInstance(myProject), qualifiedName);
}
return null;
}
@NotNull
@Override
public PsiPackage[] getSubPackages(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
final Map<String, PsiPackage> packagesMap = new HashMap<String, PsiPackage>();
final String qualifiedName = psiPackage.getQualifiedName();
for (final String prefix : myPackagePrefixIndex.getAllPackagePrefixes(scope)) {
if (StringUtil.isEmpty(qualifiedName) || StringUtil.startsWithConcatenation(prefix, qualifiedName, ".")) {
final int i = prefix.indexOf('.', qualifiedName.length() + 1);
String childName = i >= 0 ? prefix.substring(0, i) : prefix;
if (!packagesMap.containsKey(childName)) {
packagesMap.put(childName, new PsiPackageImpl(psiPackage.getManager(), childName));
}
}
}
packagesMap.remove(qualifiedName); // avoid SOE caused by returning a package as a subpackage of itself
return packagesMap.values().toArray(new PsiPackage[packagesMap.size()]);
}
public boolean packagePrefixExists(String packageQName) {
for (final String prefix : myPackagePrefixIndex.getAllPackagePrefixes(null)) {
if (StringUtil.startsWithConcatenation(prefix, packageQName, ".") || prefix.equals(packageQName)) {
return true;
}
}
return false;
}
public static PackagePrefixElementFinder getInstance(Project project) {
for (PsiElementFinder o : Extensions.getExtensions(PsiElementFinder.EP_NAME, project)) {
if (o instanceof PackagePrefixElementFinder) {
return (PackagePrefixElementFinder) o;
}
}
throw new UnsupportedOperationException("couldn't find self");
}
}
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