| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.codeInsight; |
| |
| import com.intellij.psi.JavaPsiFacade; |
| import com.intellij.psi.PsiAnnotation; |
| import com.intellij.psi.PsiAnnotationMemberValue; |
| import com.intellij.psi.PsiNameValuePair; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.annotation.IncompleteAnnotationException; |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| |
| class AnnotationInvocationHandler implements InvocationHandler { |
| @NotNull private final Class<? extends Annotation> type; |
| @NotNull private final PsiAnnotation myAnnotation; |
| |
| AnnotationInvocationHandler(@NotNull Class<? extends Annotation> type, @NotNull PsiAnnotation annotation) { |
| this.type = type; |
| myAnnotation = annotation; |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method method, Object[] args) { |
| String member = method.getName(); |
| Class<?>[] paramTypes = method.getParameterTypes(); |
| |
| assert paramTypes.length == 0; |
| if (member.equals("toString")) { |
| return toStringImpl(); |
| } |
| if (member.equals("annotationType")) { |
| return type; |
| } |
| |
| // Handle annotation member accessors |
| PsiAnnotationMemberValue value = myAnnotation.findAttributeValue(member); |
| if (value == null) { |
| throw new IncompleteAnnotationException(type, member); |
| } |
| |
| Object result = JavaPsiFacade.getInstance(myAnnotation.getProject()).getConstantEvaluationHelper().computeConstantExpression(value); |
| |
| if (result == null) { |
| throw new IncompleteAnnotationException(type, member+". (unable to evaluate annotation value '"+value+"')"); |
| } |
| |
| // todo arrays |
| return result; |
| } |
| |
| /** |
| * Implementation of dynamicProxy.toString() |
| */ |
| private String toStringImpl() { |
| StringBuilder result = new StringBuilder(128); |
| result.append('@'); |
| result.append(type.getName()); |
| result.append('('); |
| boolean firstMember = true; |
| PsiNameValuePair[] attributes = myAnnotation.getParameterList().getAttributes(); |
| for (PsiNameValuePair e : attributes) { |
| if (firstMember) { |
| firstMember = false; |
| } |
| else { |
| result.append(", "); |
| } |
| |
| result.append(e.getName()); |
| result.append('='); |
| PsiAnnotationMemberValue value = e.getValue(); |
| result.append(value == null ? "null" : value.getText()); |
| } |
| result.append(')'); |
| return result.toString(); |
| } |
| } |