001    /*
002     * Copyright 2010-2015 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.kotlin.psi;
018    
019    import com.intellij.psi.PsiElement;
020    import com.intellij.psi.util.PsiTreeUtil;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.Nullable;
023    import org.jetbrains.kotlin.name.FqName;
024    import org.jetbrains.kotlin.name.FqNameUnsafe;
025    import org.jetbrains.kotlin.name.Name;
026    
027    public final class JetNamedDeclarationUtil {
028        @Nullable
029        public static FqNameUnsafe getUnsafeFQName(@NotNull JetNamedDeclaration namedDeclaration) {
030            FqName fqName = namedDeclaration.getFqName();
031            return fqName != null ? fqName.toUnsafe() : null;
032        }
033    
034        @Nullable
035        //NOTE: use JetNamedDeclaration#getFqName instead
036        /*package private*/ static FqName getFQName(@NotNull JetNamedDeclaration namedDeclaration) {
037            Name name = namedDeclaration.getNameAsName();
038            if (name == null) {
039                return null;
040            }
041    
042            FqName parentFqName = getParentFqName(namedDeclaration);
043    
044            if (parentFqName == null) {
045                return null;
046            }
047    
048            return parentFqName.child(name);
049        }
050    
051        @Nullable
052        public static FqName getParentFqName(@NotNull JetNamedDeclaration namedDeclaration) {
053            PsiElement parent = namedDeclaration.getParent();
054            if (parent instanceof JetClassBody) {
055                // One nesting to JetClassBody doesn't affect to qualified name
056                parent = parent.getParent();
057            }
058    
059            if (parent instanceof JetFile) {
060                return ((JetFile) parent).getPackageFqName();
061            }
062            else if (parent instanceof JetNamedFunction || parent instanceof JetClass) {
063                return getFQName((JetNamedDeclaration) parent);
064            }
065            else if (namedDeclaration instanceof JetParameter) {
066                JetClassOrObject constructorClass = JetPsiUtil.getClassIfParameterIsProperty((JetParameter) namedDeclaration);
067                if (constructorClass != null) {
068                    return getFQName(constructorClass);
069                }
070            }
071            else if (parent instanceof JetObjectDeclaration) {
072                 return getFQName((JetNamedDeclaration) parent);
073            }
074            return null;
075        }
076    
077        private JetNamedDeclarationUtil() {
078        }
079    }