01: /*
02: * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25: package com.sun.xml.internal.txw2;
26:
27: /**
28: * @author Kohsuke Kawaguchi
29: */
30: abstract class Content {
31: private Content next;
32:
33: /**
34: * Returns null if the next token has not decided yet.
35: */
36: final Content getNext() {
37: return next;
38: }
39:
40: /**
41: *
42: * @param doc
43: * A {@link Content} object is so light-weight that
44: * it doesn't even remember what document it belongs to.
45: * So the caller needs to "remind" a {@link Content}
46: * who its owner is.
47: */
48: final void setNext(Document doc, Content next) {
49: assert next != null;
50: assert this .next == null : "next of " + this
51: + " is already set to " + this .next;
52: this .next = next;
53: doc.run();
54: }
55:
56: /**
57: * Returns true if this content is ready to be committed.
58: */
59: boolean isReadyToCommit() {
60: return true;
61: }
62:
63: /**
64: * Returns true if this {@link Content} can guarantee that
65: * no more new namespace decls is necessary for the currently
66: * pending start tag.
67: */
68: abstract boolean concludesPendingStartTag();
69:
70: /**
71: * Accepts a visitor.
72: */
73: abstract void accept(ContentVisitor visitor);
74:
75: /**
76: * Called when this content is written to the output.
77: */
78: public void written() {
79: }
80: }
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