001    /*
002     * Copyright 2010-2013 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.jet.lang.resolve.java.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.jet.lang.resolve.java.JvmAnnotationNames;
023    import org.jetbrains.jet.lang.resolve.java.resolver.JavaAnnotationResolver;
024    import org.jetbrains.jet.lang.resolve.java.structure.JavaAnnotation;
025    import org.jetbrains.jet.lang.resolve.java.structure.JavaAnnotationArgument;
026    import org.jetbrains.jet.lang.resolve.java.structure.JavaLiteralAnnotationArgument;
027    import org.jetbrains.jet.lang.resolve.java.structure.JavaMember;
028    
029    public class SignaturesUtil {
030        private SignaturesUtil() {
031        }
032    
033        @Nullable
034        public static String getKotlinSignature(@NotNull JavaAnnotationResolver annotationResolver, @NotNull JavaMember member) {
035            JavaAnnotation annotation = annotationResolver.findAnnotationWithExternal(member, JvmAnnotationNames.KOTLIN_SIGNATURE);
036    
037            if (annotation != null) {
038                JavaAnnotationArgument argument = annotation.findArgument(JvmAnnotationNames.KOTLIN_SIGNATURE_VALUE_FIELD_NAME);
039                if (argument instanceof JavaLiteralAnnotationArgument) {
040                    Object value = ((JavaLiteralAnnotationArgument) argument).getValue();
041                    if (value instanceof String) {
042                        return StringUtil.unescapeStringCharacters((String) value);
043                    }
044                }
045            }
046    
047            return null;
048        }
049    }