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.kt;
018    
019    import com.intellij.psi.PsiAnnotation;
020    import com.intellij.psi.PsiParameter;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.Nullable;
023    import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
024    import org.jetbrains.jet.lang.resolve.java.resolver.JavaAnnotationResolver;
025    
026    public class JetTypeParameterAnnotation extends PsiAnnotationWrapper {
027        private static final JetTypeParameterAnnotation NULL_ANNOTATION = new JetTypeParameterAnnotation(null);
028        static {
029            NULL_ANNOTATION.checkInitialized();
030        }
031    
032        private JetTypeParameterAnnotation(@Nullable PsiAnnotation psiAnnotation) {
033            super(psiAnnotation);
034        }
035    
036        @Override
037        protected void initialize() {
038        }
039    
040        @NotNull
041        public static JetTypeParameterAnnotation get(@NotNull PsiParameter psiParameter) {
042            PsiAnnotation annotation =
043                    JavaAnnotationResolver.findOwnAnnotation(psiParameter, JvmStdlibNames.JET_TYPE_PARAMETER.getFqName().asString());
044            return annotation != null ? new JetTypeParameterAnnotation(annotation) : NULL_ANNOTATION;
045        }
046    }