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Java > Open Source Codes > org > apache > beehive > netui > databinding > datagrid > runtime > rendering > pager > PreviousNextPagerRenderer


1 /*
2  * Copyright 2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  * $Header:$
17  */
18 package org.apache.beehive.netui.databinding.datagrid.runtime.rendering.pager;
19
20 import org.apache.beehive.netui.util.internal.InternalStringBuilder;
21
22 import org.apache.beehive.netui.databinding.datagrid.api.pager.PagerModel;
23 import org.apache.beehive.netui.databinding.datagrid.api.rendering.IDataGridMessageKeys;
24 import org.apache.beehive.netui.databinding.datagrid.api.rendering.PagerRenderer;
25
26 public final class PreviousNextPagerRenderer
27     extends PagerRenderer {
28
29     protected String JavaDoc internalRender() {
30         InternalStringBuilder buf = new InternalStringBuilder();
31         PagerModel pagerModel = getPagerModel();
32         int currentPage = pagerModel.getPage();
33         int lastPage = pagerModel.getLastPage();
34
35         buf.append(getDataGridTagModel().formatMessage(IDataGridMessageKeys.PAGER_FMT_BANNER,
36                                                        new Object JavaDoc[]{new Integer JavaDoc(currentPage + 1),
37                                                                     new Integer JavaDoc(lastPage + 1)}));
38
39         buf.append("  ");
40         if(pagerModel.getPreviousPage() > -1)
41             buf.append(buildLivePreviousLink());
42         else if(lastPage > 0)
43             buf.append(buildDeadPreviousLink());
44
45         buf.append(" ");
46         if(pagerModel.getNextPage() <= pagerModel.getLastPage())
47             buf.append(buildLiveNextPageLink());
48         else if(lastPage > 0)
49             buf.append(buildDeadNextLink());
50
51         return buf.toString();
52     }
53 }
54
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