AddModuleFilter


1   /*
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12   * enclosed by brackets [] replaced by your own identifying information:
13   * "Portions Copyrighted [year] [name of copyright owner]"
14   *
15   * The Original Software is NetBeans. The Initial Developer of the Original
16   * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
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18   */
19  
20  package org.netbeans.modules.apisupport.project.ui.customizer;
21  
22  import java.text.Collator  ;
23  import java.util.Iterator  ;
24  import java.util.LinkedHashSet  ;
25  import java.util.Locale  ;
26  import java.util.Set  ;
27  import java.util.TreeSet  ;
28  
29  /**
30   * Implements filtering for Add Module Dependency panel.
31   * @author Jesse Glick
32   */
33  final class AddModuleFilter {
34  
35      private final Set  <ModuleDependency> universe;
36      private final String   dependingModuleCNB;
37  
38      /**
39       * Construct a filter given a list of possible dependencies.
40       */
41      public AddModuleFilter(Set  <ModuleDependency> universe, String   dependingModuleCNB) {
42          this.universe = universe;
43          this.dependingModuleCNB = dependingModuleCNB;
44          // Prime the cache:
45          Iterator   it = universe.iterator();
46          while (it.hasNext()) {
47              ModuleDependency dep = (ModuleDependency) it.next();
48              dep.getFilterTokens(dependingModuleCNB);
49          }
50          // To test "Please wait" use:
51          //try{Thread.sleep(2000);}catch(InterruptedException e){}
52      }
53      
54      /**
55       * Find matches for a search string.
56       */
57      public Set  <ModuleDependency> getMatches(String   text) {
58          String   textLC = text.toLowerCase(Locale.ENGLISH);
59          Set  <ModuleDependency>[] matches = new Set  [3];
60          for (int i = 0; i < matches.length; i++) {
61              // Within groups, just sort by module display name:
62              matches[i] = new TreeSet  (ModuleDependency.LOCALIZED_NAME_COMPARATOR);
63          }
64          Iterator   it = universe.iterator();
65          while (it.hasNext()) {
66              ModuleDependency dep = (ModuleDependency) it.next();
67              int matchLevel = matches.length;
68              Set  <String  > tokens = dep.getFilterTokens(dependingModuleCNB);
69              Iterator   it2 = tokens.iterator();
70              while (it2.hasNext()) {
71                  String   token = ((String  ) it2.next()).toLowerCase(Locale.ENGLISH);
72                  // Presort by relevance (#71995):
73                  if (token.equals(textLC) || token.endsWith("." + textLC)) { // NOI18N
74                      // Exact match (possibly after dot).
75                      matchLevel = Math.min(0, matchLevel);
76                  } else if (token.indexOf("." + textLC) != -1) { // NOI18N
77                      // Starts with match (after dot).
78                      matchLevel = Math.min(1, matchLevel);
79                  } else if (token.indexOf(textLC) != -1) {
80                      // Substring match.
81                      matchLevel = Math.min(2, matchLevel);
82                  }
83              }
84              if (matchLevel < matches.length) {
85                  matches[matchLevel].add(dep);
86              }
87          }
88          Set   result = new LinkedHashSet  ();
89          for (int i = 0; i < matches.length; i++) {
90              result.addAll(matches[i]);
91          }
92          return result;
93      }
94      
95      /**
96       * Find which tokens actually matched a given dependency.
97       */
98      public Set  <String  > getMatchesFor(String   text, ModuleDependency dep) {
99          String   textLC = text.toLowerCase(Locale.US);
100         Set  <String  > tokens = new TreeSet  (Collator.getInstance());
101         Iterator   it = dep.getFilterTokens(dependingModuleCNB).iterator();
102         while (it.hasNext()) {
103             String   token = (String  ) it.next();
104             if (token.toLowerCase(Locale.US).indexOf(textLC) != -1) {
105                 tokens.add(token);
106             }
107         }
108         return tokens;
109     }
110     
111 }
112
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