jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/model/AnnotationProxyMaker.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/model/AnnotationProxyMaker.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/model/AnnotationProxyMaker.java

Thu, 02 Oct 2008 19:58:40 -0700

author: xdono
date: Thu, 02 Oct 2008 19:58:40 -0700
changeset 117: 24a47c3062fe
parent 113: eff38cc97183
child 184: 905e151a185a
permissions: -rw-r--r--

6754988: Update copyright year
Summary: Update for files that have been modified starting July 2008
Reviewed-by: ohair, tbell

 /*
  * Copyright 2005-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.javac.model;
 import com.sun.tools.javac.util.*;
 import java.lang.annotation.*;
 import java.lang.reflect.Array;
 import java.lang.reflect.Method;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import sun.reflect.annotation.*;
 import javax.lang.model.type.TypeMirror;
 import javax.lang.model.type.MirroredTypeException;
 import javax.lang.model.type.MirroredTypesException;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.code.Type.ArrayType;
 /**
  * A generator of dynamic proxy implementations of
  * java.lang.annotation.Annotation.
  *
  * <p> The "dynamic proxy return form" of an annotation element value is
  * the form used by sun.reflect.annotation.AnnotationInvocationHandler.
  *
  * <p><b>This is NOT part of any API supported by Sun Microsystems.  If
  * you write code that depends on this, you do so at your own risk.
  * This code and its internal interfaces are subject to change or
  * deletion without notice.</b>
  */
 public class AnnotationProxyMaker {
     private final Attribute.Compound anno;
     private final Class<? extends Annotation> annoType;
     private AnnotationProxyMaker(Attribute.Compound anno,
                                  Class<? extends Annotation> annoType) {
         this.anno = anno;
         this.annoType = annoType;
     }
     /**
      * Returns a dynamic proxy for an annotation mirror.
      */
     public static <A extends Annotation> A generateAnnotation(
             Attribute.Compound anno, Class<A> annoType) {
         AnnotationProxyMaker apm = new AnnotationProxyMaker(anno, annoType);
         return annoType.cast(apm.generateAnnotation());
     }
     /**
      * Returns a dynamic proxy for an annotation mirror.
      */
     private Annotation generateAnnotation() {
         return AnnotationParser.annotationForMap(annoType,
                                                  getAllReflectedValues());
     }
     /**
      * Returns a map from element names to their values in "dynamic
      * proxy return form".  Includes all elements, whether explicit or
      * defaulted.
      */
     private Map<String, Object> getAllReflectedValues() {
         Map<String, Object> res = new LinkedHashMap<String, Object>();
         for (Map.Entry<MethodSymbol, Attribute> entry :
                                                   getAllValues().entrySet()) {
             MethodSymbol meth = entry.getKey();
             Object value = generateValue(meth, entry.getValue());
             if (value != null) {
                 res.put(meth.name.toString(), value);
             } else {
                 // Ignore this element.  May (properly) lead to
                 // IncompleteAnnotationException somewhere down the line.
             }
         }
         return res;
     }
     /**
      * Returns a map from element symbols to their values.
      * Includes all elements, whether explicit or defaulted.
      */
     private Map<MethodSymbol, Attribute> getAllValues() {
         Map<MethodSymbol, Attribute> res =
             new LinkedHashMap<MethodSymbol, Attribute>();
         // First find the default values.
         ClassSymbol sym = (ClassSymbol) anno.type.tsym;
         for (Scope.Entry e = sym.members().elems; e != null; e = e.sibling) {
             if (e.sym.kind == Kinds.MTH) {
                 MethodSymbol m = (MethodSymbol) e.sym;
                 Attribute def = m.getDefaultValue();
                 if (def != null)
                     res.put(m, def);
             }
         }
         // Next find the explicit values, possibly overriding defaults.
         for (Pair<MethodSymbol, Attribute> p : anno.values)
             res.put(p.fst, p.snd);
         return res;
     }
     /**
      * Converts an element value to its "dynamic proxy return form".
      * Returns an exception proxy on some errors, but may return null if
      * a useful exception cannot or should not be generated at this point.
      */
     private Object generateValue(MethodSymbol meth, Attribute attr) {
         ValueVisitor vv = new ValueVisitor(meth);
         return vv.getValue(attr);
     }
     private class ValueVisitor implements Attribute.Visitor {
         private MethodSymbol meth;      // annotation element being visited
         private Class<?> returnClass;   // return type of annotation element
         private Object value;           // value in "dynamic proxy return form"
         ValueVisitor(MethodSymbol meth) {
             this.meth = meth;
         }
         Object getValue(Attribute attr) {
             Method method;              // runtime method of annotation element
             try {
                 method = annoType.getMethod(meth.name.toString());
             } catch (NoSuchMethodException e) {
                 return null;
             }
             returnClass = method.getReturnType();
             attr.accept(this);
             if (!(value instanceof ExceptionProxy) &&
                 !AnnotationType.invocationHandlerReturnType(returnClass)
                                                         .isInstance(value)) {
                 typeMismatch(method, attr);
             }
             return value;
         }
         public void visitConstant(Attribute.Constant c) {
             value = c.getValue();
         }
         public void visitClass(Attribute.Class c) {
             value = new MirroredTypeExceptionProxy(c.type);
         }
         public void visitArray(Attribute.Array a) {
             Name elemName = ((ArrayType) a.type).elemtype.tsym.name;
             if (elemName == elemName.table.names.java_lang_Class) {   // Class[]
                 // Construct a proxy for a MirroredTypesException
                 List<TypeMirror> elems = List.nil();
                 for (Attribute value : a.values) {
                     Type elem = ((Attribute.Class) value).type;
                     elems.add(elem);
                 }
                 value = new MirroredTypesExceptionProxy(elems);
             } else {
                 int len = a.values.length;
                 Class<?> returnClassSaved = returnClass;
                 returnClass = returnClass.getComponentType();
                 try {
                     Object res = Array.newInstance(returnClass, len);
                     for (int i = 0; i < len; i++) {
                         a.values[i].accept(this);
                         if (value == null || value instanceof ExceptionProxy) {
                             return;
                         }
                         try {
                             Array.set(res, i, value);
                         } catch (IllegalArgumentException e) {
                             value = null;       // indicates a type mismatch
                             return;
                         }
                     }
                     value = res;
                 } finally {
                     returnClass = returnClassSaved;
                 }
             }
         }
         @SuppressWarnings("unchecked")
         public void visitEnum(Attribute.Enum e) {
             if (returnClass.isEnum()) {
                 String constName = e.value.toString();
                 try {
                     value = Enum.valueOf((Class) returnClass, constName);
                 } catch (IllegalArgumentException ex) {
                     value = new EnumConstantNotPresentExceptionProxy(
                                         (Class) returnClass, constName);
                 }
             } else {
                 value = null;   // indicates a type mismatch
             }
         }
         public void visitCompound(Attribute.Compound c) {
             try {
                 Class<? extends Annotation> nested =
                     returnClass.asSubclass(Annotation.class);
                 value = generateAnnotation(c, nested);
             } catch (ClassCastException ex) {
                 value = null;   // indicates a type mismatch
             }
         }
         public void visitError(Attribute.Error e) {
             value = null;       // indicates a type mismatch
         }
         /**
          * Sets "value" to an ExceptionProxy indicating a type mismatch.
          */
         private void typeMismatch(final Method method, final Attribute attr) {
             value = new ExceptionProxy() {
                 static final long serialVersionUID = 269;
                 public String toString() {
                     return "<error>";   // eg:  @Anno(value=<error>)
                 }
                 protected RuntimeException generateException() {
                     return new AnnotationTypeMismatchException(method,
                                 attr.type.toString());
                 }
             };
         }
     }
     /**
      * ExceptionProxy for MirroredTypeException.
      * The toString, hashCode, and equals methods foward to the underlying
      * type.
      */
     private static class MirroredTypeExceptionProxy extends ExceptionProxy {
         static final long serialVersionUID = 269;
         private transient final TypeMirror type;
         private final String typeString;
         MirroredTypeExceptionProxy(TypeMirror t) {
             type = t;
             typeString = t.toString();
         }
         public String toString() {
             return typeString;
         }
         public int hashCode() {
             return (type != null ? type : typeString).hashCode();
         }
         public boolean equals(Object obj) {
             return type != null &&
                    obj instanceof MirroredTypeExceptionProxy &&
                    type.equals(((MirroredTypeExceptionProxy) obj).type);
         }
         protected RuntimeException generateException() {
             return new MirroredTypeException(type);
         }
     }
     /**
      * ExceptionProxy for MirroredTypesException.
      * The toString, hashCode, and equals methods foward to the underlying
      * types.
      */
     private static class MirroredTypesExceptionProxy extends ExceptionProxy {
         static final long serialVersionUID = 269;
         private transient final List<TypeMirror> types;
         private final String typeStrings;
         MirroredTypesExceptionProxy(List<TypeMirror> ts) {
             types = ts;
             typeStrings = ts.toString();
         }
         public String toString() {
             return typeStrings;
         }
         public int hashCode() {
             return (types != null ? types : typeStrings).hashCode();
         }
         public boolean equals(Object obj) {
             return types != null &&
                    obj instanceof MirroredTypesExceptionProxy &&
                    types.equals(
                       ((MirroredTypesExceptionProxy) obj).types);
         }
         protected RuntimeException generateException() {
             return new MirroredTypesException(types);
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/model/AnnotationProxyMaker.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/model/AnnotationProxyMaker.java