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Java > Open Source Codes > org > eclipse > jdt > internal > ui > callhierarchy > SearchUtil


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * Jesper Kamstrup Linnet (eclipse@kamstrup-linnet.dk) - initial API and implementation
10  * (report 36180: Callers/Callees view)
11  *******************************************************************************/
12 package org.eclipse.jdt.internal.ui.callhierarchy;
13
14 import java.util.Arrays JavaDoc;
15 import java.util.HashSet JavaDoc;
16 import java.util.Iterator JavaDoc;
17 import java.util.Set JavaDoc;
18
19 import org.eclipse.jface.dialogs.IDialogSettings;
20
21 import org.eclipse.ui.IWorkingSet;
22 import org.eclipse.ui.PlatformUI;
23
24 import org.eclipse.jdt.internal.corext.util.Messages;
25
26 import org.eclipse.jdt.internal.ui.JavaPlugin;
27 import org.eclipse.jdt.internal.ui.search.LRUWorkingSetsList;
28 import org.eclipse.jdt.internal.ui.search.WorkingSetComparator;
29
30 public class SearchUtil {
31     
32     // LRU working sets
33 public static int LRU_WORKINGSET_LIST_SIZE= 3;
34     private static LRUWorkingSetsList fgLRUWorkingSets;
35     // Settings store
36 private static final String JavaDoc DIALOG_SETTINGS_KEY= "CallHierarchySearchScope"; //$NON-NLS-1$
37 private static final String JavaDoc STORE_LRU_WORKING_SET_NAMES= "lastUsedWorkingSetNames"; //$NON-NLS-1$
38 private static IDialogSettings fgSettingsStore;
39     
40     /**
41      * Updates the LRU list of working sets.
42      *
43      * @param workingSets the workings sets to be added to the LRU list
44      */
45     public static void updateLRUWorkingSets(IWorkingSet[] workingSets) {
46         if (workingSets == null || workingSets.length < 1)
47             return;
48         
49         SearchUtil.getLRUWorkingSets().add(workingSets);
50         SearchUtil.saveState();
51     }
52     
53     private static void saveState() {
54         IWorkingSet[] workingSets;
55         Iterator JavaDoc iter= SearchUtil.fgLRUWorkingSets.iterator();
56         int i= 0;
57         while (iter.hasNext()) {
58             workingSets= (IWorkingSet[])iter.next();
59             String JavaDoc[] names= new String JavaDoc[workingSets.length];
60             for (int j= 0; j < workingSets.length; j++)
61                 names[j]= workingSets[j].getName();
62             SearchUtil.fgSettingsStore.put(SearchUtil.STORE_LRU_WORKING_SET_NAMES + i, names);
63             i++;
64         }
65     }
66     
67     public static LRUWorkingSetsList getLRUWorkingSets() {
68         if (SearchUtil.fgLRUWorkingSets == null) {
69             restoreState();
70         }
71         return SearchUtil.fgLRUWorkingSets;
72     }
73     
74     static void restoreState() {
75         SearchUtil.fgLRUWorkingSets= new LRUWorkingSetsList(SearchUtil.LRU_WORKINGSET_LIST_SIZE);
76         SearchUtil.fgSettingsStore= JavaPlugin.getDefault().getDialogSettings().getSection(SearchUtil.DIALOG_SETTINGS_KEY);
77         if (SearchUtil.fgSettingsStore == null)
78             SearchUtil.fgSettingsStore= JavaPlugin.getDefault().getDialogSettings().addNewSection(SearchUtil.DIALOG_SETTINGS_KEY);
79         
80         boolean foundLRU= false;
81         for (int i= SearchUtil.LRU_WORKINGSET_LIST_SIZE - 1; i >= 0; i--) {
82             String JavaDoc[] lruWorkingSetNames= SearchUtil.fgSettingsStore.getArray(SearchUtil.STORE_LRU_WORKING_SET_NAMES + i);
83             if (lruWorkingSetNames != null) {
84                 Set JavaDoc workingSets= new HashSet JavaDoc(2);
85                 for (int j= 0; j < lruWorkingSetNames.length; j++) {
86                     IWorkingSet workingSet= PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSet(lruWorkingSetNames[j]);
87                     if (workingSet != null) {
88                         workingSets.add(workingSet);
89                     }
90                 }
91                 foundLRU= true;
92                 if (!workingSets.isEmpty())
93                     SearchUtil.fgLRUWorkingSets.add((IWorkingSet[])workingSets.toArray(new IWorkingSet[workingSets.size()]));
94             }
95         }
96         if (!foundLRU)
97             // try old preference format
98 restoreFromOldFormat();
99     }
100     
101     private static void restoreFromOldFormat() {
102         SearchUtil.fgLRUWorkingSets= new LRUWorkingSetsList(SearchUtil.LRU_WORKINGSET_LIST_SIZE);
103         SearchUtil.fgSettingsStore= JavaPlugin.getDefault().getDialogSettings().getSection(SearchUtil.DIALOG_SETTINGS_KEY);
104         if (SearchUtil.fgSettingsStore == null)
105             SearchUtil.fgSettingsStore= JavaPlugin.getDefault().getDialogSettings().addNewSection(SearchUtil.DIALOG_SETTINGS_KEY);
106         
107         boolean foundLRU= false;
108         String JavaDoc[] lruWorkingSetNames= SearchUtil.fgSettingsStore.getArray(SearchUtil.STORE_LRU_WORKING_SET_NAMES);
109         if (lruWorkingSetNames != null) {
110             for (int i= lruWorkingSetNames.length - 1; i >= 0; i--) {
111                 IWorkingSet workingSet= PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSet(lruWorkingSetNames[i]);
112                 if (workingSet != null) {
113                     foundLRU= true;
114                     SearchUtil.fgLRUWorkingSets.add(new IWorkingSet[]{workingSet});
115                 }
116             }
117         }
118         if (foundLRU)
119             // save in new format
120 saveState();
121     }
122     
123     public static String JavaDoc toString(IWorkingSet[] workingSets) {
124         Arrays.sort(workingSets, new WorkingSetComparator());
125         String JavaDoc result= ""; //$NON-NLS-1$
126 if (workingSets != null && workingSets.length > 0) {
127             boolean firstFound= false;
128             for (int i= 0; i < workingSets.length; i++) {
129                 String JavaDoc workingSetName= workingSets[i].getLabel();
130                 if (firstFound)
131                     result= Messages.format(CallHierarchyMessages.SearchUtil_workingSetConcatenation, new String JavaDoc[] {result, workingSetName});
132                 else {
133                     result= workingSetName;
134                     firstFound= true;
135                 }
136             }
137         }
138         return result;
139     }
140 }
141
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