diff -r fd16c54261b3 -r 06bc494ca11e langtools/src/share/classes/com/sun/tools/doclets/internal/toolkit/builders/AbstractBuilder.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/doclets/internal/toolkit/builders/AbstractBuilder.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2003 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.doclets.internal.toolkit.builders;
+
+import com.sun.tools.doclets.internal.toolkit.*;
+import com.sun.tools.doclets.internal.toolkit.util.*;
+import java.io.*;
+import java.lang.reflect.*;
+import java.util.*;
+
+/**
+ * The superclass for all builders.  A builder is a class that provides
+ * the structure and content of API documentation.  A builder is completely
+ * doclet independent which means that any doclet can use builders to
+ * construct documentation, as long as it impelements the appropriate
+ * writer interfaces.  For example, if a doclet wanted to use
+ * {@link ConstantsSummaryBuilder} to build a constant summary, all it has to
+ * do is implement the ConstantsSummaryWriter interface and pass it to the
+ * builder using a WriterFactory.
+ *
+ * This code is not part of an API.
+ * It is implementation that is subject to change.
+ * Do not use it as an API
+ *
+ * @author Jamie Ho
+ * @since 1.5
+ */
+
+public abstract class AbstractBuilder {
+
+    /**
+     * The configuration used in this run of the doclet.
+     */
+    protected Configuration configuration;
+
+    /**
+     * Keep track of which packages we have seen for
+     * efficiency purposes.  We don't want to copy the
+     * doc files multiple times for a single package.
+     */
+    protected static Set containingPackagesSeen;
+
+    /**
+     * True if we want to print debug output.
+     */
+    protected static final boolean DEBUG = false;
+
+    /**
+     * Construct a Builder.
+     * @param configuration the configuration used in this run
+     *        of the doclet.
+     */
+    public AbstractBuilder(Configuration configuration) {
+        this.configuration = configuration;
+    }
+
+    /**
+     * Return the name of this builder.
+     *
+     * @return the name of the builder.
+     */
+    public abstract String getName();
+
+    /**
+     * Build the documentation.
+     *
+     * @throws IOException there was a problem writing the output.
+     */
+    public abstract void build() throws IOException;
+
+    /**
+     * Build the documentation, as specified by the given XML elements.
+     *
+     * @param elements the XML elements that specify which components to
+     *                 document.
+     */
+    protected void build(List elements) {
+        for (int i = 0; i < elements.size(); i++ ) {
+            Object element = elements.get(i);
+            String component = (String)
+                ((element instanceof String) ?
+                     element :
+                    ((List) element).get(0));
+            try {
+                invokeMethod("build" + component,
+                    element instanceof String ?
+                        new Class[] {} :
+                        new Class[] {List.class},
+                    element instanceof String ?
+                        new Object[] {} :
+                        new Object[] {((List) element).subList(1,
+                            ((List) element).size())});
+            } catch (NoSuchMethodException e) {
+                e.printStackTrace();
+                configuration.root.printError("Unknown element: " + component);
+                throw new DocletAbortException();
+            } catch (InvocationTargetException e) {
+                e.getCause().printStackTrace();
+            } catch (Exception e) {
+                e.printStackTrace();
+                configuration.root.printError("Exception " +
+                    e.getClass().getName() +
+                    " thrown while processing element: " + component);
+                throw new DocletAbortException();
+            }
+        }
+    }
+
+    /**
+     * Given the name and parameters, invoke the method in the builder.  This
+     * method is required to invoke the appropriate build method as instructed
+     * by the builder XML file.
+     *
+     * @param methodName   the name of the method that we would like to invoke.
+     * @param paramClasses the types for each parameter.
+     * @param params       the parameters of the method.
+     */
+    protected abstract void invokeMethod(String methodName, Class[] paramClasses,
+            Object[] params)
+    throws Exception;
+}