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
017package org.jetbrains.jet.lang.resolve.java.kt;
018
019import com.intellij.openapi.util.text.StringUtil;
020import com.intellij.psi.PsiAnnotation;
021import com.intellij.psi.PsiModifierListOwner;
022import org.jetbrains.annotations.NotNull;
023import org.jetbrains.annotations.Nullable;
024import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
025import org.jetbrains.jet.lang.resolve.java.resolver.JavaAnnotationResolver;
026
027public class KotlinSignatureAnnotation extends PsiAnnotationWrapper {
028    private static final KotlinSignatureAnnotation NULL_ANNOTATION = new KotlinSignatureAnnotation(null);
029    static {
030        NULL_ANNOTATION.checkInitialized();
031    }
032
033    private String signature;
034
035    private KotlinSignatureAnnotation(@Nullable PsiAnnotation psiAnnotation) {
036        super(psiAnnotation);
037    }
038
039    @Override
040    protected void initialize() {
041        signature = StringUtil.unescapeStringCharacters(getStringAttribute(JvmStdlibNames.KOTLIN_SIGNATURE_VALUE_METHOD, ""));
042    }
043
044    @NotNull
045    public String signature() {
046        checkInitialized();
047        return signature;
048    }
049
050    @NotNull
051    public static KotlinSignatureAnnotation get(PsiModifierListOwner psiModifierListOwner) {
052        PsiAnnotation annotation =
053                JavaAnnotationResolver.findAnnotationWithExternal(psiModifierListOwner, JvmStdlibNames.KOTLIN_SIGNATURE.getFqName().asString());
054        return annotation != null ? new KotlinSignatureAnnotation(annotation) : NULL_ANNOTATION;
055    }
056}