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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.psi.util.proximity;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.*;
import com.intellij.psi.util.ProximityLocation;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author peter
*/
public class KnownElementWeigher extends ProximityWeigher {
@Override
public Comparable weigh(@NotNull final PsiElement element, @NotNull final ProximityLocation location) {
for (ForcedElementWeigher weigher : Extensions.getExtensions(ForcedElementWeigher.EP_NAME)) {
final Comparable weigh = weigher.getForcedWeigh(element);
if (weigh != null) return weigh;
}
Project project = location.getProject();
if (project == null || !SdkOrLibraryWeigher.isJdkElement(element, project)) {
return 0;
}
if (element instanceof PsiClass) {
return getJdkClassProximity((PsiClass)element);
}
if (element instanceof PsiMethod) {
final PsiMethod method = (PsiMethod)element;
final PsiClass containingClass = method.getContainingClass();
if (containingClass != null) {
String methodName = method.getName();
if ("finalize".equals(methodName) || "registerNatives".equals(methodName) || methodName.startsWith("wait") || methodName.startsWith("notify")) {
if (CommonClassNames.JAVA_LANG_OBJECT.equals(containingClass.getQualifiedName())) {
return -1;
}
}
if (isGetClass(method)) {
return -1;
}
if ("subSequence".equals(methodName)) {
if (CommonClassNames.JAVA_LANG_STRING.equals(containingClass.getQualifiedName())) {
return -1;
}
}
if (CommonClassNames.JAVA_LANG_OBJECT.equals(containingClass.getQualifiedName())) {
return 0;
}
return getJdkClassProximity(method.getContainingClass());
}
}
if (element instanceof PsiField) {
return getJdkClassProximity(((PsiField)element).getContainingClass());
}
return 0;
}
public static boolean isGetClass(PsiMethod method) {
return "getClass".equals(method.getName()) && method.getParameterList().getParametersCount() <= 0;
}
private static Comparable getJdkClassProximity(@Nullable PsiClass element) {
if (element == null || element.getContainingClass() != null) {
return 0;
}
@NonNls final String qname = element.getQualifiedName();
if (qname != null) {
String pkg = StringUtil.getPackageName(qname);
if (qname.equals(CommonClassNames.JAVA_LANG_OBJECT)) return 5;
if (isPopularJdkClass(qname)) return 8;
if (pkg.equals("java.lang")) return 6;
if (pkg.equals("java.util")) return 7;
if (qname.startsWith("java.lang")) return 5;
if (qname.startsWith("java.util")) return 4;
if (pkg.equals("javax.swing")) return 3;
if (qname.startsWith("java.")) return 2;
if (qname.startsWith("javax.")) return 1;
if (qname.startsWith("com.")) return -1;
if (qname.startsWith("net.")) return -1;
}
return 0;
}
private static boolean isPopularJdkClass(String qname) {
return qname.equals(CommonClassNames.JAVA_LANG_STRING) ||
qname.equals(System.class.getName()) ||
qname.equals(CommonClassNames.JAVA_LANG_EXCEPTION) ||
qname.equals(CommonClassNames.JAVA_LANG_THROWABLE) ||
qname.equals(CommonClassNames.JAVA_LANG_RUNTIME_EXCEPTION) ||
qname.equals(CommonClassNames.JAVA_LANG_RUNNABLE) ||
qname.equals(CommonClassNames.JAVA_LANG_CLASS);
}
}
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