01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: *
17: * $Header:$
18: */
19: package org.apache.beehive.netui.tags.tree;
20:
21: import org.apache.beehive.netui.tags.html.HtmlConstants;
22: import org.apache.beehive.netui.tags.rendering.AbstractHtmlState;
23: import org.apache.beehive.netui.tags.rendering.AbstractRenderAppender;
24:
25: import javax.servlet.http.HttpServletRequest;
26: import javax.servlet.jsp.JspException;
27:
28: /**
29: * Base class to help handle issues specific to rendering a tree
30: * for certain paths of execution in NetUI. For example, the handling
31: * of errors is different for the Tree tag rendering than the Serlvet
32: * that renders a tree node for an XmlHttpRequest.
33: */
34: abstract public class TreeRenderSupport implements HtmlConstants {
35: abstract protected void registerTagError(String message, Throwable e)
36: throws JspException;
37:
38: abstract protected String renderTagId(HttpServletRequest request,
39: String tagId, AbstractHtmlState state);
40:
41: protected void renderBeforeNode(AbstractRenderAppender writer,
42: TreeElement node) {
43: }
44:
45: protected void renderAfterNode(AbstractRenderAppender writer,
46: TreeElement node) {
47: }
48: }
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