1 /**
2 * This file Copyright (c) 2014-2015 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.rendering.util;
35
36 import java.io.IOException;
37
38 /**
39 * Wrapper for {@link Appendable} that appends all the text to wrapped Appendable only if writeEnabled=true.
40 */
41 public class FilteringAppendableWrapper implements Appendable {
42
43 private boolean writeEnabled = true;
44 private Appendable appendable;
45
46 public boolean isWriteEnabled() {
47 return writeEnabled;
48 }
49
50 public void setWriteEnabled(boolean writeEnabled) {
51 this.writeEnabled = writeEnabled;
52 }
53
54 @Override
55 public Appendable append(CharSequence csq) throws IOException {
56 checkAppendableForNull();
57 if (isWriteEnabled()) {
58 getWrappedAppendable().append(csq);
59 }
60 return getWrappedAppendable();
61 }
62
63 @Override
64 public Appendable append(char c) throws IOException {
65 checkAppendableForNull();
66 if (isWriteEnabled()) {
67 getWrappedAppendable().append(c);
68 }
69 return getWrappedAppendable();
70 }
71
72 @Override
73 public Appendable append(CharSequence csq, int start, int end) throws IOException {
74 checkAppendableForNull();
75 if (isWriteEnabled()) {
76 getWrappedAppendable().append(csq, start, end);
77 }
78 return getWrappedAppendable();
79 }
80
81 private void checkAppendableForNull() throws IOException {
82 if (getWrappedAppendable() == null) {
83 throw new IOException("Can't use wrapped appendable since it's not yet initialized.");
84 }
85 }
86
87 public Appendable getWrappedAppendable() {
88 return appendable;
89 }
90
91 public void setWrappedAppendable(Appendable appendable) {
92 this.appendable = appendable;
93 }
94 }