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1
31 package org.blojsom.plugin.xpath;
32
33 import org.apache.commons.jxpath.JXPathContext;
34 import org.apache.commons.logging.Log;
35 import org.apache.commons.logging.LogFactory;
36 import org.blojsom.blog.Entry;
37 import org.blojsom.blog.Blog;
38 import org.blojsom.plugin.PluginException;
39 import org.blojsom.plugin.search.SimpleSearchPlugin;
40
41 import javax.servlet.http.HttpServletRequest  ;
42 import javax.servlet.http.HttpServletResponse ;
43 import java.util.ArrayList ;
44 import java.util.Iterator ;
45 import java.util.List ;
46 import java.util.Map ;
47
48
56 public class XPathSearchPlugin extends SimpleSearchPlugin {
57
58 private Log _logger = LogFactory.getLog(XPathSearchPlugin.class);
59
60
71 public Entry[] process(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Blog blog, Map context, Entry[] entries) throws PluginException {
72 Entry[] results;
73
74 String query = httpServletRequest.getParameter(QUERY_PARAM);
75
76 if (query != null) {
77 query = query.trim();
78 if (query.startsWith("/")) {
79 if (_logger.isDebugEnabled()) {
80 _logger.debug("Attempting xpath query with: " + query);
81 }
82
83 EntryWrapper entryWrapper = new EntryWrapper(entries);
84 List foundEntries = new ArrayList ();
85 JXPathContext xpathcontext = JXPathContext.newContext(entryWrapper);
86 try {
87 Iterator entryIterator = xpathcontext.iterate(query);
88 while (entryIterator.hasNext()) {
89 Object object = entryIterator.next();
90 Entry entry = (Entry) object;
91 foundEntries.add(entry);
92 }
93 } catch (Exception e) {
94 if (_logger.isErrorEnabled()) {
95 _logger.error(e);
96 }
97 }
98
99 if (foundEntries.size() == 0) {
100 results = new Entry[0];
101 } else {
102 results = new Entry[foundEntries.size()];
103 for (int x = 0; x < foundEntries.size(); x++) {
104 results[x] = (Entry) foundEntries.get(x);
105 }
106 }
107 } else {
108 results = super.process(httpServletRequest, httpServletResponse, blog, context, entries);
109 }
110 } else {
111 results = entries;
112 }
113
114 return results;
115 }
116 }
117 |
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