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 /**
25 *
26 * @author lu4242
27 */
28 public class SharedStringBuilder
29 {
30 public static StringBuilder get(String stringBuilderKey)
31 {
32 return get(FacesContext.getCurrentInstance(), stringBuilderKey);
33 }
34
35 // TODO checkstyle complains; does this have to lead with __ ?
36 public static StringBuilder get(FacesContext facesContext, String stringBuilderKey)
37 {
38 Map<Object, Object> attributes = facesContext.getAttributes();
39
40 StringBuilder sb = (StringBuilder) attributes.get(stringBuilderKey);
41
42 if (sb == null)
43 {
44 sb = new StringBuilder();
45 attributes.put(stringBuilderKey, sb);
46 }
47 else
48 {
49
50 // clear out the stringBuilder by setting the length to 0
51 sb.setLength(0);
52 }
53
54 return sb;
55 }
56
57 public static StringBuilder get(FacesContext facesContext, String stringBuilderKey, int initialSize)
58 {
59 Map<Object, Object> attributes = facesContext.getAttributes();
60
61 StringBuilder sb = (StringBuilder) attributes.get(stringBuilderKey);
62
63 if (sb == null)
64 {
65 sb = new StringBuilder(initialSize);
66 attributes.put(stringBuilderKey, sb);
67 }
68 else
69 {
70
71 // clear out the stringBuilder by setting the length to 0
72 sb.setLength(0);
73 }
74
75 return sb;
76 }
77 }