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.resolve.jvm.kotlinSignature;
018    
019    import com.intellij.openapi.util.text.StringUtil;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.kotlin.load.java.structure.JavaAnnotation;
023    import org.jetbrains.kotlin.load.java.structure.JavaAnnotationArgument;
024    import org.jetbrains.kotlin.load.java.structure.JavaLiteralAnnotationArgument;
025    import org.jetbrains.kotlin.load.java.structure.JavaMember;
026    
027    import static org.jetbrains.kotlin.load.java.JvmAnnotationNames.*;
028    
029    public class SignaturesUtil {
030        private SignaturesUtil() {
031        }
032    
033        @Nullable
034        public static String getKotlinSignature(@NotNull JavaMember member) {
035            JavaAnnotation newAnnotation = member.findAnnotation(KOTLIN_SIGNATURE);
036            if (newAnnotation != null) return extractKotlinSignatureArgument(newAnnotation);
037    
038            JavaAnnotation oldAnnotation = member.findAnnotation(OLD_KOTLIN_SIGNATURE);
039            if (oldAnnotation != null) return extractKotlinSignatureArgument(oldAnnotation);
040    
041            return null;
042        }
043    
044        @Nullable
045        private static String extractKotlinSignatureArgument(@NotNull JavaAnnotation annotation) {
046            JavaAnnotationArgument argument = annotation.findArgument(DEFAULT_ANNOTATION_MEMBER_NAME);
047            if (argument instanceof JavaLiteralAnnotationArgument) {
048                Object value = ((JavaLiteralAnnotationArgument) argument).getValue();
049                if (value instanceof String) {
050                    return StringUtil.unescapeStringCharacters((String) value);
051                }
052            }
053            return null;
054        }
055    }