1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.shared.renderkit.html.util;
20
21 import java.util.Map;
22 import javax.faces.context.FacesContext;
23
24 public class SharedStringBuilder
25 {
26 public static StringBuilder get(String stringBuilderKey)
27 {
28 return get(FacesContext.getCurrentInstance(), stringBuilderKey);
29 }
30
31 // TODO checkstyle complains; does this have to lead with __ ?
32 public static StringBuilder get(FacesContext facesContext, String stringBuilderKey)
33 {
34 Map<Object, Object> attributes = facesContext.getAttributes();
35
36 StringBuilder sb = (StringBuilder) attributes.get(stringBuilderKey);
37
38 if (sb == null)
39 {
40 sb = new StringBuilder();
41 attributes.put(stringBuilderKey, sb);
42 }
43 else
44 {
45
46 // clear out the stringBuilder by setting the length to 0
47 sb.setLength(0);
48 }
49
50 return sb;
51 }
52
53 public static StringBuilder get(FacesContext facesContext, String stringBuilderKey, int initialSize)
54 {
55 Map<Object, Object> attributes = facesContext.getAttributes();
56
57 StringBuilder sb = (StringBuilder) attributes.get(stringBuilderKey);
58
59 if (sb == null)
60 {
61 sb = new StringBuilder(initialSize);
62 attributes.put(stringBuilderKey, sb);
63 }
64 else
65 {
66
67 // clear out the stringBuilder by setting the length to 0
68 sb.setLength(0);
69 }
70
71 return sb;
72 }
73 }