author | jlahoda |
Wed, 09 Oct 2013 13:09:31 +0200 | |
changeset 21006 | 534673718919 |
parent 20249 | 93f8eae31092 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.javac.model; |
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import java.lang.annotation.Annotation; |
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import java.lang.annotation.Inherited; |
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import java.lang.reflect.InvocationTargetException; |
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import java.lang.reflect.Method; |
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import com.sun.tools.javac.code.Attribute; |
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import com.sun.tools.javac.code.Kinds; |
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import com.sun.tools.javac.code.Symbol; |
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import com.sun.tools.javac.code.Symbol.ClassSymbol; |
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import com.sun.tools.javac.code.Symbol.TypeVariableSymbol; |
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import com.sun.tools.javac.code.TargetType; |
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import com.sun.tools.javac.code.Type; |
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import com.sun.tools.javac.code.Type.AnnotatedType; |
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import com.sun.tools.javac.util.ListBuffer; |
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import static com.sun.tools.javac.code.TypeTag.CLASS; |
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import com.sun.tools.javac.util.List; |
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/** |
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* Utility methods for operating on annotated constructs. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own |
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* risk. This code and its internal interfaces are subject to change |
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* or deletion without notice.</b></p> |
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*/ |
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public class JavacAnnoConstructs { |
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// <editor-fold defaultstate="collapsed" desc="Symbols"> |
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|
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/** |
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* An internal-use utility that creates a runtime view of an |
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* annotation. This is the implementation of |
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* Element.getAnnotation(Class). |
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*/ |
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public static <A extends Annotation> A getAnnotation(Symbol annotated, |
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Class<A> annoType) { |
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if (!annoType.isAnnotation()) |
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throw new IllegalArgumentException("Not an annotation type: " |
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+ annoType); |
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Attribute.Compound c; |
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if (annotated.kind == Kinds.TYP && |
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annotated instanceof ClassSymbol) { |
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c = getAttributeOnClass((ClassSymbol)annotated, annoType); |
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} else if (annotated.kind == Kinds.TYP && |
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annotated instanceof TypeVariableSymbol) { |
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c = getAttributeOnTypeVariable((TypeVariableSymbol)annotated, annoType); |
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} else { |
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c = getAttribute(annotated, annoType); |
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} |
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return c == null ? null : AnnotationProxyMaker.generateAnnotation(c, annoType); |
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} |
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// Helper to getAnnotation[s] |
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private static <A extends Annotation> Attribute.Compound getAttribute(Symbol annotated, |
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Class<A> annoType) { |
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String name = annoType.getName(); |
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for (Attribute.Compound anno : annotated.getRawAttributes()) { |
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if (name.equals(anno.type.tsym.flatName().toString())) |
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return anno; |
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} |
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return null; |
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} |
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// Helper to getAnnotation[s] |
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private static <A extends Annotation> Attribute.Compound |
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getAttributeOnTypeVariable(TypeVariableSymbol annotated, Class<A> annoType) { |
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String name = annoType.getName(); |
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// Declaration annotations on type variables are stored in type attributes |
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// on the owner of the TypeVariableSymbol |
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List<Attribute.Compound> res = List.nil(); |
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List<Attribute.TypeCompound> candidates = annotated.owner.getRawTypeAttributes(); |
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for (Attribute.TypeCompound anno : candidates) |
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if (anno.position.type == TargetType.CLASS_TYPE_PARAMETER || |
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anno.position.type == TargetType.METHOD_TYPE_PARAMETER) |
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if (name.equals(anno.type.tsym.flatName().toString())) |
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return anno; |
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return null; |
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} |
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// Helper to getAnnotation[s] |
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private static <A extends Annotation> Attribute.Compound getAttributeOnClass( |
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ClassSymbol annotated, |
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final Class<A> annoType) |
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{ |
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boolean inherited = annoType.isAnnotationPresent(Inherited.class); |
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Attribute.Compound result = null; |
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result = getAttribute(annotated, annoType); |
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if (result != null || !inherited) |
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return result; |
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while ((annotated = nextSupertypeToSearch(annotated)) != null) { |
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result = getAttribute(annotated, annoType); |
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if (result != null) |
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return result; |
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} |
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return null; // no more supertypes to search |
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} |
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|
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/** |
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* Returns the next type to search for inherited annotations or {@code null} |
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* if the next type can't be found. |
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*/ |
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private static ClassSymbol nextSupertypeToSearch(ClassSymbol annotated) { |
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if (annotated.name == annotated.name.table.names.java_lang_Object) |
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return null; |
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137 |
|
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Type sup = annotated.getSuperclass(); |
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if (!sup.hasTag(CLASS) || sup.isErroneous()) |
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return null; |
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|
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return (ClassSymbol) sup.tsym; |
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} |
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/** |
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* An internal-use utility that creates a runtime view of |
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* annotations. This is the implementation of |
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* Element.getAnnotations(Class). |
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*/ |
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public static <A extends Annotation> A[] getAnnotationsByType(Symbol annotated, |
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Class<A> annoType) |
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{ |
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if (!annoType.isAnnotation()) |
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throw new IllegalArgumentException("Not an annotation type: " |
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+ annoType); |
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// If annoType does not declare a container this is equivalent to wrapping |
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// getAnnotation(...) in an array. |
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Class <? extends Annotation> containerType = getContainer(annoType); |
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if (containerType == null) { |
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A res = getAnnotation(annotated, annoType); |
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int size; |
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if (res == null) { |
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size = 0; |
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} else { |
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size = 1; |
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} |
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@SuppressWarnings("unchecked") // annoType is the Class for A |
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A[] arr = (A[])java.lang.reflect.Array.newInstance(annoType, size); |
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if (res != null) |
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arr[0] = res; |
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return arr; |
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} |
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|
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// So we have a containing type |
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String annoTypeName = annoType.getName(); |
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String containerTypeName = containerType.getName(); |
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int directIndex = -1, containerIndex = -1; |
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Attribute.Compound direct = null, container = null; |
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// Find directly (explicit or implicit) present annotations |
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int index = -1; |
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for (List<Attribute.Compound> list = annotated.getAnnotationMirrors(); |
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!list.isEmpty(); |
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list = list.tail) { |
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Attribute.Compound attribute = list.head; |
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index++; |
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if (attribute.type.tsym.flatName().contentEquals(annoTypeName)) { |
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directIndex = index; |
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direct = attribute; |
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} else if(containerTypeName != null && |
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attribute.type.tsym.flatName().contentEquals(containerTypeName)) { |
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containerIndex = index; |
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container = attribute; |
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} |
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} |
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|
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// Deal with inherited annotations |
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if (direct == null && container == null) { |
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if (annotated.kind == Kinds.TYP && |
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(annotated instanceof ClassSymbol)) { |
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ClassSymbol s = nextSupertypeToSearch((ClassSymbol)annotated); |
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if (s != null) |
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return getAnnotationsByType(s, annoType); |
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} |
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} |
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|
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// Pack them in an array |
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Attribute[] contained0 = null; |
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if (container != null) |
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contained0 = unpackAttributes(container); |
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ListBuffer<Attribute.Compound> compounds = new ListBuffer<>(); |
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if (contained0 != null) { |
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for (Attribute a : contained0) |
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if (a instanceof Attribute.Compound) |
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compounds = compounds.append((Attribute.Compound)a); |
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} |
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Attribute.Compound[] contained = compounds.toArray(new Attribute.Compound[compounds.size()]); |
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|
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int size = (direct == null ? 0 : 1) + contained.length; |
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@SuppressWarnings("unchecked") // annoType is the Class for A |
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A[] arr = (A[])java.lang.reflect.Array.newInstance(annoType, size); |
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|
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// if direct && container, which is first? |
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int insert = -1; |
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int length = arr.length; |
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if (directIndex >= 0 && containerIndex >= 0) { |
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if (directIndex < containerIndex) { |
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arr[0] = AnnotationProxyMaker.generateAnnotation(direct, annoType); |
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insert = 1; |
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} else { |
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arr[arr.length - 1] = AnnotationProxyMaker.generateAnnotation(direct, annoType); |
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insert = 0; |
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length--; |
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} |
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} else if (directIndex >= 0) { |
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arr[0] = AnnotationProxyMaker.generateAnnotation(direct, annoType); |
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return arr; |
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} else { |
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// Only container |
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insert = 0; |
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} |
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|
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for (int i = 0; i + insert < length; i++) |
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arr[insert + i] = AnnotationProxyMaker.generateAnnotation(contained[i], annoType); |
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|
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return arr; |
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} |
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|
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// </editor-fold> |
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// <editor-fold defaultstate="collapsed" desc="Types"> |
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|
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/** |
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* An internal-use utility that creates a runtime view of an |
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* annotation. This is the implementation of |
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* TypeMirror.getAnnotation(Class). |
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*/ |
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public static <A extends Annotation> A getAnnotation(AnnotatedType annotated, Class<A> annoType) { |
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if (!annoType.isAnnotation()) |
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throw new IllegalArgumentException("Not an annotation type: " |
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+ annoType); |
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Attribute.Compound c = getAttribute(annotated, annoType); |
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return c == null ? null : AnnotationProxyMaker.generateAnnotation(c, annoType); |
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} |
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|
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// Helper to getAnnotation[s] |
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private static <A extends Annotation> Attribute.Compound getAttribute(Type annotated, |
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Class<A> annoType) { |
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String name = annoType.getName(); |
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|
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for (Attribute.Compound anno : annotated.getAnnotationMirrors()) { |
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if (name.equals(anno.type.tsym.flatName().toString())) |
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return anno; |
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} |
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|
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return null; |
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} |
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|
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/** |
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* An internal-use utility that creates a runtime view of |
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* annotations. This is the implementation of |
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* TypeMirror.getAnnotationsByType(Class). |
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*/ |
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public static <A extends Annotation> A[] getAnnotationsByType(AnnotatedType annotated, Class<A> annoType) { |
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if (!annoType.isAnnotation()) |
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throw new IllegalArgumentException("Not an annotation type: " |
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+ annoType); |
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// If annoType does not declare a container this is equivalent to wrapping |
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// getAnnotation(...) in an array. |
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Class <? extends Annotation> containerType = getContainer(annoType); |
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if (containerType == null) { |
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A res = getAnnotation(annotated, annoType); |
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int size; |
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if (res == null) { |
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size = 0; |
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} else { |
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size = 1; |
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} |
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@SuppressWarnings("unchecked") // annoType is the Class for A |
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A[] arr = (A[])java.lang.reflect.Array.newInstance(annoType, size); |
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if (res != null) |
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arr[0] = res; |
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return arr; |
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} |
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|
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// So we have a containing type |
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String annoTypeName = annoType.getName(); |
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String containerTypeName = containerType.getName(); |
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int directIndex = -1, containerIndex = -1; |
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Attribute.Compound direct = null, container = null; |
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// Find directly (explicit or implicit) present annotations |
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int index = -1; |
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for (List<? extends Attribute.Compound> list = annotated.getAnnotationMirrors(); |
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!list.isEmpty(); |
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list = list.tail) { |
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Attribute.Compound attribute = list.head; |
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index++; |
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if (attribute.type.tsym.flatName().contentEquals(annoTypeName)) { |
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directIndex = index; |
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direct = attribute; |
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} else if(containerTypeName != null && |
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attribute.type.tsym.flatName().contentEquals(containerTypeName)) { |
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containerIndex = index; |
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container = attribute; |
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} |
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} |
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|
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// Pack them in an array |
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Attribute[] contained0 = null; |
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if (container != null) |
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contained0 = unpackAttributes(container); |
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ListBuffer<Attribute.Compound> compounds = new ListBuffer<>(); |
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if (contained0 != null) { |
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for (Attribute a : contained0) |
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if (a instanceof Attribute.Compound) |
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compounds = compounds.append((Attribute.Compound)a); |
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} |
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Attribute.Compound[] contained = compounds.toArray(new Attribute.Compound[compounds.size()]); |
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|
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int size = (direct == null ? 0 : 1) + contained.length; |
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@SuppressWarnings("unchecked") // annoType is the Class for A |
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A[] arr = (A[])java.lang.reflect.Array.newInstance(annoType, size); |
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|
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// if direct && container, which is first? |
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int insert = -1; |
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int length = arr.length; |
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if (directIndex >= 0 && containerIndex >= 0) { |
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if (directIndex < containerIndex) { |
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arr[0] = AnnotationProxyMaker.generateAnnotation(direct, annoType); |
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insert = 1; |
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} else { |
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arr[arr.length - 1] = AnnotationProxyMaker.generateAnnotation(direct, annoType); |
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insert = 0; |
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length--; |
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} |
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} else if (directIndex >= 0) { |
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arr[0] = AnnotationProxyMaker.generateAnnotation(direct, annoType); |
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return arr; |
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} else { |
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// Only container |
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insert = 0; |
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361 |
} |
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362 |
|
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for (int i = 0; i + insert < length; i++) |
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arr[insert + i] = AnnotationProxyMaker.generateAnnotation(contained[i], annoType); |
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|
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return arr; |
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367 |
} |
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|
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// </editor-fold> |
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370 |
|
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371 |
// <editor-fold defaultstate="collapsed" desc="Container support"> |
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372 |
|
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// Needed to unpack the runtime view of containing annotations |
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private static final Class<? extends Annotation> REPEATABLE_CLASS = initRepeatable(); |
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private static final Method VALUE_ELEMENT_METHOD = initValueElementMethod(); |
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|
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private static Class<? extends Annotation> initRepeatable() { |
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try { |
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// Repeatable will not be available when bootstrapping on |
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// JDK 7 so use a reflective lookup instead of a class |
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// literal for Repeatable.class. |
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return Class.forName("java.lang.annotation.Repeatable").asSubclass(Annotation.class); |
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} catch (ClassNotFoundException e) { |
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return null; |
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385 |
} catch (SecurityException e) { |
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386 |
return null; |
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|
387 |
} |
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|
388 |
} |
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|
389 |
|
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390 |
private static Method initValueElementMethod() { |
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391 |
if (REPEATABLE_CLASS == null) |
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|
392 |
return null; |
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|
393 |
|
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|
394 |
Method m = null; |
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395 |
try { |
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396 |
m = REPEATABLE_CLASS.getMethod("value"); |
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397 |
if (m != null) |
67a3ae363f03
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|
398 |
m.setAccessible(true); |
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|
399 |
return m; |
67a3ae363f03
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|
400 |
} catch (NoSuchMethodException e) { |
67a3ae363f03
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|
401 |
return null; |
67a3ae363f03
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parents:
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|
402 |
} |
67a3ae363f03
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|
403 |
} |
67a3ae363f03
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|
404 |
|
67a3ae363f03
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|
405 |
// Helper to getAnnotations |
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406 |
private static Class<? extends Annotation> getContainer(Class<? extends Annotation> annoType) { |
67a3ae363f03
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|
407 |
// Since we can not refer to java.lang.annotation.Repeatable until we are |
67a3ae363f03
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|
408 |
// bootstrapping with java 8 we need to get the Repeatable annotation using |
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|
409 |
// reflective invocations instead of just using its type and element method. |
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|
410 |
if (REPEATABLE_CLASS != null && |
67a3ae363f03
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|
411 |
VALUE_ELEMENT_METHOD != null) { |
67a3ae363f03
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|
412 |
// Get the Repeatable instance on the annotations declaration |
67a3ae363f03
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|
413 |
Annotation repeatable = (Annotation)annoType.getAnnotation(REPEATABLE_CLASS); |
67a3ae363f03
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|
414 |
if (repeatable != null) { |
67a3ae363f03
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diff
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|
415 |
try { |
67a3ae363f03
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|
416 |
// Get the value element, it should be a class |
67a3ae363f03
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|
417 |
// indicating the containing annotation type |
67a3ae363f03
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|
418 |
@SuppressWarnings("unchecked") |
67a3ae363f03
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|
419 |
Class<? extends Annotation> containerType = (Class)VALUE_ELEMENT_METHOD.invoke(repeatable); |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
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|
420 |
if (containerType == null) |
67a3ae363f03
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parents:
diff
changeset
|
421 |
return null; |
67a3ae363f03
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jjg
parents:
diff
changeset
|
422 |
|
67a3ae363f03
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parents:
diff
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|
423 |
return containerType; |
67a3ae363f03
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parents:
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changeset
|
424 |
} catch (ClassCastException e) { |
67a3ae363f03
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jjg
parents:
diff
changeset
|
425 |
return null; |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
426 |
} catch (IllegalAccessException e) { |
67a3ae363f03
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jjg
parents:
diff
changeset
|
427 |
return null; |
67a3ae363f03
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jjg
parents:
diff
changeset
|
428 |
} catch (InvocationTargetException e ) { |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
429 |
return null; |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
430 |
} |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
431 |
} |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
432 |
} |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
433 |
return null; |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
434 |
} |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
435 |
|
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
436 |
// Helper to getAnnotations |
67a3ae363f03
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jjg
parents:
diff
changeset
|
437 |
private static Attribute[] unpackAttributes(Attribute.Compound container) { |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
438 |
// We now have an instance of the container, |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
439 |
// unpack it returning an instance of the |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
440 |
// contained type or null |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
441 |
return ((Attribute.Array)container.member(container.type.tsym.name.table.names.value)).values; |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
442 |
} |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
443 |
|
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
444 |
// </editor-fold> |
67a3ae363f03
8007803: Implement javax.lang.model API for Type Annotations
jjg
parents:
diff
changeset
|
445 |
} |