Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. 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.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package com.sun.tools.javadoc;

 import com.sun.javadoc.*;

 import com.sun.tools.javac.code.Attribute;

 import com.sun.tools.javac.code.Symbol.*;

 import com.sun.tools.javac.util.List;

 import com.sun.tools.javac.util.Pair;

 /**

  * Represents an annotation.

  * An annotation associates a value with each element of an annotation type.

  * Sure it ought to be called "Annotation", but that clashes with

  * java.lang.annotation.Annotation.

  *

  *  <p><b>This is NOT part of any supported API.

  *  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>

  *

  * @author Scott Seligman

  * @since 1.5

  */

 public class AnnotationDescImpl implements AnnotationDesc {

     private final DocEnv env;

     private final Attribute.Compound annotation;

     AnnotationDescImpl(DocEnv env, Attribute.Compound annotation) {

         this.env = env;

         this.annotation = annotation;

     }

     /**

      * Returns the annotation type of this annotation.

      */

     public AnnotationTypeDoc annotationType() {

         ClassSymbol atsym = (ClassSymbol)annotation.type.tsym;

         if (annotation.type.isErroneous()) {

             env.warning(null, "javadoc.class_not_found", annotation.type.toString());

             return new AnnotationTypeDocImpl(env, atsym);

         } else {

             return (AnnotationTypeDoc)env.getClassDoc(atsym);

         }

     }

     /**

      * Returns this annotation's elements and their values.

      * Only those explicitly present in the annotation are

      * included, not those assuming their default values.

      * Returns an empty array if there are none.

      */

     public ElementValuePair[] elementValues() {

         List<Pair<MethodSymbol,Attribute>> vals = annotation.values;

         ElementValuePair res[] = new ElementValuePair[vals.length()];

         int i = 0;

         for (Pair<MethodSymbol,Attribute> val : vals) {

             res[i++] = new ElementValuePairImpl(env, val.fst, val.snd);

         }

         return res;

     }

     /**

      * Returns a string representation of this annotation.

      * String is of one of the forms:

      *     @com.example.foo(name1=val1, name2=val2)

      *     @com.example.foo(val)

      *     @com.example.foo

      * Omit parens for marker annotations, and omit "value=" when allowed.

      */

     @Override

     public String toString() {

         StringBuilder sb = new StringBuilder("@");

         sb.append(annotation.type.tsym);

         ElementValuePair vals[] = elementValues();

         if (vals.length > 0) {          // omit parens for marker annotation

             sb.append('(');

             boolean first = true;

             for (ElementValuePair val : vals) {

                 if (!first) {

                     sb.append(", ");

                 }

                 first = false;

                 String name = val.element().name();

                 if (vals.length == 1 && name.equals("value")) {

                     sb.append(val.value());

                 } else {

                     sb.append(val);

                 }

             }

             sb.append(')');

         }

         return sb.toString();

     }

     /**

      * Represents an association between an annotation type element

      * and one of its values.

      */

     public static class ElementValuePairImpl implements ElementValuePair {

         private final DocEnv env;

         private final MethodSymbol meth;

         private final Attribute value;

         ElementValuePairImpl(DocEnv env, MethodSymbol meth, Attribute value) {

             this.env = env;

             this.meth = meth;

             this.value = value;

         }

         /**

          * Returns the annotation type element.

          */

         public AnnotationTypeElementDoc element() {

             return env.getAnnotationTypeElementDoc(meth);

         }

         /**

          * Returns the value associated with the annotation type element.

          */

         public AnnotationValue value() {

             return new AnnotationValueImpl(env, value);

         }

         /**

          * Returns a string representation of this pair

          * of the form "name=value".

          */

         @Override

         public String toString() {

             return meth.name + "=" + value();

         }

     }

 }