aoqi@0: /*
aoqi@0:  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.txw2;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  */
aoqi@0: abstract class Content {
aoqi@0:     private Content next;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns null if the next token has not decided yet.
aoqi@0:      */
aoqi@0:     final Content getNext() {
aoqi@0:         return next;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      *
aoqi@0:      * @param doc
aoqi@0:      *      A {@link Content} object is so light-weight that
aoqi@0:      *      it doesn't even remember what document it belongs to.
aoqi@0:      *      So the caller needs to "remind" a {@link Content}
aoqi@0:      *      who its owner is.
aoqi@0:      */
aoqi@0:     final void setNext(Document doc,Content next) {
aoqi@0:         assert next!=null;
aoqi@0:         assert this.next==null : "next of "+this+" is already set to "+this.next;
aoqi@0:         this.next = next;
aoqi@0:         doc.run();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns true if this content is ready to be committed.
aoqi@0:      */
aoqi@0:     boolean isReadyToCommit() {
aoqi@0:         return true;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns true if this {@link Content} can guarantee that
aoqi@0:      * no more new namespace decls is necessary for the currently
aoqi@0:      * pending start tag.
aoqi@0:      */
aoqi@0:     abstract boolean concludesPendingStartTag();
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Accepts a visitor.
aoqi@0:      */
aoqi@0:     abstract void accept(ContentVisitor visitor);
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Called when this content is written to the output.
aoqi@0:      */
aoqi@0:     public void written() {
aoqi@0:     }
aoqi@0: }