1 /*
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 *
14 */
15 package org.esigate.esi;
16
17 import java.io.IOException;
18
19 import org.esigate.HttpErrorPage;
20 import org.esigate.parser.Element;
21 import org.esigate.parser.ParserContext;
22
23 abstract class BaseElement implements Element {
24 private Element parent = null;
25
26 protected BaseElement() {
27 }
28
29 /** Additional tag initialization callback. */
30 protected boolean parseTag(Tag tag, ParserContext ctx) throws HttpErrorPage {
31 // Default implementation does nothing
32 return true;
33 }
34
35 @Override
36 public boolean onTagStart(String tag, ParserContext ctx) throws IOException, HttpErrorPage {
37 Tag tagObj = Tag.create(tag);
38 parent = ctx.getCurrent();
39 return parseTag(tagObj, ctx);
40 }
41
42 @Override
43 public boolean onError(Exception e, ParserContext ctx) {
44 return false;
45 }
46
47 /*
48 * (non-Javadoc)
49 *
50 * @see org.esigate.parser.Element#characters(java.lang.CharSequence, int, int)
51 */
52 @Override
53 public void characters(CharSequence csq, int start, int end) throws IOException {
54 parent.characters(csq, start, end);
55 }
56
57 }