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.components.ExternalAnnotationResolver;
023    import org.jetbrains.kotlin.load.java.structure.*;
024    import org.jetbrains.kotlin.name.FqName;
025    
026    import static org.jetbrains.kotlin.load.java.JvmAnnotationNames.*;
027    
028    public class SignaturesUtil {
029        private SignaturesUtil() {
030        }
031    
032        @Nullable
033        public static String getKotlinSignature(@NotNull ExternalAnnotationResolver externalAnnotationResolver, @NotNull JavaMember member) {
034            JavaAnnotation newAnnotation = findAnnotationWithExternal(externalAnnotationResolver, member, KOTLIN_SIGNATURE);
035            if (newAnnotation != null) return extractKotlinSignatureArgument(newAnnotation);
036    
037            JavaAnnotation oldAnnotation = findAnnotationWithExternal(externalAnnotationResolver, member, OLD_KOTLIN_SIGNATURE);
038            if (oldAnnotation != null) return extractKotlinSignatureArgument(oldAnnotation);
039    
040            return null;
041        }
042    
043        @Nullable
044        private static String extractKotlinSignatureArgument(@NotNull JavaAnnotation annotation) {
045            JavaAnnotationArgument argument = annotation.findArgument(DEFAULT_ANNOTATION_MEMBER_NAME);
046            if (argument instanceof JavaLiteralAnnotationArgument) {
047                Object value = ((JavaLiteralAnnotationArgument) argument).getValue();
048                if (value instanceof String) {
049                    return StringUtil.unescapeStringCharacters((String) value);
050                }
051            }
052            return null;
053        }
054    
055        @Nullable
056        public static JavaAnnotation findAnnotationWithExternal(@NotNull ExternalAnnotationResolver externalAnnotationResolver, @NotNull JavaAnnotationOwner owner, @NotNull FqName name) {
057            JavaAnnotation annotation = owner.findAnnotation(name);
058            if (annotation != null) {
059                return annotation;
060            }
061    
062            return externalAnnotationResolver.findExternalAnnotation(owner, name);
063        }
064    
065    }