2 * Copyright 2005 the original author or authors.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package org.wamblee.crawler.kiss;
19 import java.io.InputStream;
20 import java.util.ArrayList;
21 import java.util.Iterator;
22 import java.util.List;
24 import org.dom4j.Attribute;
25 import org.dom4j.Document;
26 import org.dom4j.DocumentException;
27 import org.dom4j.Element;
28 import org.dom4j.io.SAXReader;
29 import org.wamblee.conditions.AndCondition;
30 import org.wamblee.conditions.Condition;
31 import org.wamblee.conditions.PropertyRegexCondition;
32 import org.wamblee.crawler.kiss.ProgramFilter.ProgramAction;
35 * Parse the configuration of desired programs.
37 class ProgramConfigurationParser {
39 private static final String ELEM_PROGRAM = "program";
41 private static final String ELEM_PATTERN = "match";
43 private static final String ELEM_ACTION = "action";
45 private static final String ACTION_NOTIFY = "notify";
48 * Parses the condition used to match the desired programs.
51 * Input stream to parse from.
54 List<ProgramFilter> parse(InputStream aStream) {
55 List<ProgramFilter> filters = new ArrayList<ProgramFilter>();
57 SAXReader reader = new SAXReader();
58 Document document = reader.read(aStream);
60 Element root = document.getRootElement();
62 for (Iterator i = root.elementIterator(ELEM_PROGRAM); i.hasNext();) {
63 Element program = (Element) i.next();
65 Element actionElem = program.element(ELEM_ACTION);
66 ProgramAction action = ProgramAction.RECORD;
67 if (actionElem != null) {
68 if (actionElem.getText().equals(ACTION_NOTIFY)) {
69 action = ProgramAction.NOTIFY;
72 List<Condition<Program>> regexConditions =
73 new ArrayList<Condition<Program>>();
74 for (Iterator j = program.elementIterator(ELEM_PATTERN); j.hasNext(); ) {
75 Element patternElem = (Element)j.next();
76 String fieldName = "name";
77 Attribute fieldAttribute = patternElem.attribute("field");
78 if ( fieldAttribute != null ) {
79 fieldName = fieldAttribute.getText();
81 String pattern = ".*(" + patternElem.getText()
83 regexConditions.add(new PropertyRegexCondition<Program>(fieldName, pattern, true));
85 Condition<Program> condition = new AndCondition<Program>(regexConditions);
86 filters.add(new ProgramFilter(condition, action));
89 } catch (DocumentException e) {
90 throw new RuntimeException("Error parsing program configuraiton", e);