--- /dev/null
+/*
+ * Copyright 2003-2006 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 sun.reflect.annotation;
+
+import java.lang.annotation.*;
+import java.lang.reflect.*;
+import java.util.*;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/**
+ * Represents an annotation type at run time. Used to type-check annotations
+ * and apply member defaults.
+ *
+ * @author Josh Bloch
+ * @since 1.5
+ */
+public class AnnotationType {
+ /**
+ * Annotation class -> AnnotationType mapping. This emulates
+ * sun.misc.SharedSecrets.getJavaLangAccess().getAnnotationType() and
+ * sun.misc.SharedSecrets.getJavaLangAccess().setAnnotationType() so
+ * this class can be used with gnu classpath.
+ *
+ * @author Mathias Panzenböck
+ */
+ private static Map<Class, AnnotationType> annotationTypes =
+ new HashMap<Class, AnnotationType>();
+
+ /**
+ * Member name -> type mapping. Note that primitive types
+ * are represented by the class objects for the corresponding wrapper
+ * types. This matches the return value that must be used for a
+ * dynamic proxy, allowing for a simple isInstance test.
+ */
+ private final Map<String, Class> memberTypes = new HashMap<String,Class>();
+
+ /**
+ * Member name -> default value mapping.
+ */
+ private final Map<String, Object> memberDefaults =
+ new HashMap<String, Object>();
+
+ /**
+ * Member name -> Method object mapping. This (and its assoicated
+ * accessor) are used only to generate AnnotationTypeMismatchExceptions.
+ */
+ private final Map<String, Method> members = new HashMap<String, Method>();
+
+ /**
+ * The retention policy for this annotation type.
+ */
+ private RetentionPolicy retention = RetentionPolicy.RUNTIME;;
+
+ /**
+ * Whether this annotation type is inherited.
+ */
+ private boolean inherited = false;
+
+ /**
+ * Returns an AnnotationType instance for the specified annotation type.
+ *
+ * @throw IllegalArgumentException if the specified class object for
+ * does not represent a valid annotation type
+ */
+ public static synchronized AnnotationType getInstance(
+ Class annotationClass)
+ {
+ /*
+ AnnotationType result = sun.misc.SharedSecrets.getJavaLangAccess().
+ getAnnotationType(annotationClass);
+ */
+ AnnotationType result = annotationTypes.get(annotationClass);
+ if (result == null)
+ result = new AnnotationType((Class<?>) annotationClass);
+
+ return result;
+ }
+
+ /**
+ * Sole constructor.
+ *
+ * @param annotationClass the class object for the annotation type
+ * @throw IllegalArgumentException if the specified class object for
+ * does not represent a valid annotation type
+ */
+ private AnnotationType(final Class<?> annotationClass) {
+ if (!annotationClass.isAnnotation())
+ throw new IllegalArgumentException("Not an annotation type");
+
+ Method[] methods =
+ AccessController.doPrivileged(new PrivilegedAction<Method[]>() {
+ public Method[] run() {
+ // Initialize memberTypes and defaultValues
+ return annotationClass.getDeclaredMethods();
+ }
+ });
+
+
+ for (Method method : methods) {
+ if (method.getParameterTypes().length != 0)
+ throw new IllegalArgumentException(method + " has params");
+ String name = method.getName();
+ Class type = method.getReturnType();
+ memberTypes.put(name, invocationHandlerReturnType(type));
+ members.put(name, method);
+
+ Object defaultValue = method.getDefaultValue();
+ if (defaultValue != null)
+ memberDefaults.put(name, defaultValue);
+
+ members.put(name, method);
+ }
+
+ /*
+ sun.misc.SharedSecrets.getJavaLangAccess().
+ setAnnotationType(annotationClass, this);
+ */
+
+ annotationTypes.put(annotationClass, this);
+
+ // Initialize retention, & inherited fields. Special treatment
+ // of the corresponding annotation types breaks infinite recursion.
+ if (annotationClass != Retention.class &&
+ annotationClass != Inherited.class) {
+ Retention ret = annotationClass.getAnnotation(Retention.class);
+ retention = (ret == null ? RetentionPolicy.CLASS : ret.value());
+ inherited = annotationClass.isAnnotationPresent(Inherited.class);
+ }
+ }
+
+ /**
+ * Returns the type that must be returned by the invocation handler
+ * of a dynamic proxy in order to have the dynamic proxy return
+ * the specified type (which is assumed to be a legal member type
+ * for an annotation).
+ */
+ public static Class invocationHandlerReturnType(Class type) {
+ // Translate primitives to wrappers
+ if (type == byte.class)
+ return Byte.class;
+ if (type == char.class)
+ return Character.class;
+ if (type == double.class)
+ return Double.class;
+ if (type == float.class)
+ return Float.class;
+ if (type == int.class)
+ return Integer.class;
+ if (type == long.class)
+ return Long.class;
+ if (type == short.class)
+ return Short.class;
+ if (type == boolean.class)
+ return Boolean.class;
+
+ // Otherwise, just return declared type
+ return type;
+ }
+
+ /**
+ * Returns member types for this annotation type
+ * (member name -> type mapping).
+ */
+ public Map<String, Class> memberTypes() {
+ return memberTypes;
+ }
+
+ /**
+ * Returns members of this annotation type
+ * (member name -> associated Method object mapping).
+ */
+ public Map<String, Method> members() {
+ return members;
+ }
+
+ /**
+ * Returns the default values for this annotation type
+ * (Member name -> default value mapping).
+ */
+ public Map<String, Object> memberDefaults() {
+ return memberDefaults;
+ }
+
+ /**
+ * Returns the retention policy for this annotation type.
+ */
+ public RetentionPolicy retention() {
+ return retention;
+ }
+
+ /**
+ * Returns true if this this annotation type is inherited.
+ */
+ public boolean isInherited() {
+ return inherited;
+ }
+
+ /**
+ * For debugging.
+ */
+ public String toString() {
+ StringBuffer s = new StringBuffer("Annotation Type:" + "\n");
+ s.append(" Member types: " + memberTypes + "\n");
+ s.append(" Member defaults: " + memberDefaults + "\n");
+ s.append(" Retention policy: " + retention + "\n");
+ s.append(" Inherited: " + inherited);
+ return s.toString();
+ }
+}
projects / cacao.git / blobdiff