1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
31 /**
32 * Performs no character escaping. Usable only when the output encoding
33 * is UTF, but this handler gives the maximum performance.
34 *
35 * @author
36 * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
37 */
38 public class MinimumEscapeHandler implements CharacterEscapeHandler {
39
40 private MinimumEscapeHandler() {} // no instanciation please
41
42 public static final CharacterEscapeHandler theInstance = new MinimumEscapeHandler();
43
44 public void escape(char[] ch, int start, int length, boolean isAttVal, Writer out) throws IOException {
45 // avoid calling the Writerwrite method too much by assuming
46 // that the escaping occurs rarely.
47 // profiling revealed that this is faster than the naive code.
48 int limit = start+length;
49 for (int i = start; i < limit; i++) {
50 char c = ch[i];
51 if(c == '&' || c == '<' || c == '>' || c == '\r' || (c == '\"' && isAttVal) ) {
52 if(i!=start)
53 out.write(ch,start,i-start);
54 start = i+1;
55 switch (ch[i]) {
56 case '&':
57 out.write("&");
58 break;
59 case '<':
60 out.write("<");
61 break;
62 case '>':
63 out.write(">");
64 break;
65 case '\"':
66 out.write(""");
67 break;
68 }
69 }
70 }
71
72 if( start!=limit )
73 out.write(ch,start,limit-start);
74 }
75
76 }
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1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
31 /**
32 * Performs no character escaping. Usable only when the output encoding
33 * is UTF, but this handler gives the maximum performance.
34 *
35 * @author
36 * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
37 */
38 public class MinimumEscapeHandler implements CharacterEscapeHandler {
39
40 private MinimumEscapeHandler() {} // no instanciation please
41
42 public static final CharacterEscapeHandler theInstance = new MinimumEscapeHandler();
43
44 public void escape(char[] ch, int start, int length, boolean isAttVal, Writer out) throws IOException {
45 // avoid calling the Writerwrite method too much by assuming
46 // that the escaping occurs rarely.
47 // profiling revealed that this is faster than the naive code.
48 int limit = start+length;
49 for (int i = start; i < limit; i++) {
50 char c = ch[i];
51 if (c == '&' || c == '<' || c == '>' || c == '\r' || (c == '\n' && isAttVal) || (c == '\"' && isAttVal)) {
52 if (i != start)
53 out.write(ch, start, i - start);
54 start = i + 1;
55 switch (ch[i]) {
56 case '&':
57 out.write("&");
58 break;
59 case '<':
60 out.write("<");
61 break;
62 case '>':
63 out.write(">");
64 break;
65 case '\"':
66 out.write(""");
67 break;
68 case '\n':
69 case '\r':
70 out.write("&#");
71 out.write(Integer.toString(c));
72 out.write(';');
73 break;
74 default:
75 throw new IllegalArgumentException("Cannot escape: '" + c + "'");
76 }
77 }
78 }
79
80 if( start!=limit )
81 out.write(ch,start,limit-start);
82 }
83
84 }
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