add ExperimentalTaglet

Author: MenoData

README.md

@@ -7,8 +7,9 @@ Additional JavaDoc-Tags
 Goals:
 ------
 
-This small library mainly serves for improvements of the JavaDoc of Time4J but might also be useful for any other java project. Three extra tags are offered:
+This small library mainly serves for improvements of the JavaDoc of Time4J but might also be useful for any other java project. Four extra tags are offered:
 
 - **doctags.concurrency** (documents the concurrency behaviour of a class)
+- **doctags.experimental** (documents the experimental status of a class)
 - **doctags.spec** (documents a specification requirement)
 - **doctags.exclude** (excludes a program element from public API and JavaDoc)

src/main/java/de/menodata/taglets/ExperimentalTaglet.java

@@ -0,0 +1,114 @@
+
+package de.menodata.taglets;
+
+import com.sun.javadoc.Tag;
+import com.sun.tools.doclets.Taglet;
+
+import java.util.Map;
+
+
+/**
+ * <p>Taglet zur Dokumentation des experimentellen Status. </p>
+ *
+ * @author  Meno Hochschild
+ */
+public class ExperimentalTaglet
+    implements Taglet {
+
+    //~ Statische Felder/Initialisierungen --------------------------------
+
+    private static final String NAME = "doctags.experimental";
+    private static final String HEADER = "Experimental:";
+    private static final String DEFAULT_TEXT = "Public API can change in future without any notice.";
+
+    //~ Methoden ----------------------------------------------------------
+
+    public static void register(Map<String, Taglet> tagletMap) {
+       Taglet tag = new ExperimentalTaglet();
+       Taglet t = tagletMap.get(tag.getName());
+
+       if (t != null) {
+           tagletMap.remove(tag.getName());
+       }
+
+       tagletMap.put(tag.getName(), tag);
+    }
+
+    @Override
+    public boolean inField() {
+        return false;
+    }
+
+    @Override
+    public boolean inConstructor() {
+        return false;
+    }
+
+    @Override
+    public boolean inMethod() {
+        return false;
+    }
+
+    @Override
+    public boolean inOverview() {
+        return false;
+    }
+
+    @Override
+    public boolean inPackage() {
+        return false;
+    }
+
+    @Override
+    public boolean inType() {
+        return true;
+    }
+
+    @Override
+    public boolean isInlineTag() {
+        return false;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+    @Override
+    public String toString(Tag tag) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("<DT><B>");
+        sb.append(HEADER);
+        sb.append("</B></DT><DD>");
+        sb.append(toString(tag.text()));
+        sb.append("</DD>\n");
+        return sb.toString();
+    }
+
+    @Override
+    public String toString(Tag[] tags) {
+        if (tags.length == 0) {
+            return null;
+        }
+
+        StringBuilder sb = new StringBuilder();
+        sb.append("<DT><B>");
+        sb.append(HEADER);
+        sb.append("</B></DT><DD>");
+
+        for (int i = 0; i < tags.length; i++) {
+            if (i > 0) {
+                sb.append(" ");
+            }
+            sb.append(toString(tags[i].text()));
+        }
+
+        sb.append("</DD>\n");
+        return sb.toString();
+    }
+
+    private static String toString(String text) {
+        return ((text == null) || text.isEmpty() ? DEFAULT_TEXT : text);
+    }
+
+}