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1
11
12 package org.eclipse.ui.internal.intro.universal.contentdetect;
13
14 import java.io.File  ;
15 import java.io.FileInputStream ;
16 import java.io.FileNotFoundException ;
17 import java.io.FileOutputStream ;
18 import java.io.IOException ;
19 import java.io.InputStreamReader ;
20 import java.io.OutputStreamWriter ;
21 import java.net.URL ;
22 import java.util.HashSet ;
23 import java.util.Iterator ;
24 import java.util.Set ;
25
26 import org.eclipse.core.runtime.Platform;
27 import org.eclipse.osgi.service.datalocation.Location;
28 import org.eclipse.ui.IMemento;
29 import org.eclipse.ui.XMLMemento;
30
31 public class ContentDetectHelper {
32
33 public static final int NO_STATE = -1;
34 private static final String EXTENSION_COUNT_XML = "extensionCount.xml"; private static final String EXTENSION_NAMES_XML = "extensionNames.xml"; private static final String INTROCOUNT = "introcount"; private static final String CONTRIBUTOR = "contributor"; private static final String NAME = "name"; private static final String ROOT = "root"; private static final String PLUGIN_ID = "org.eclipse.ui.intro.universal";
42 private File configurationDirectory;
43
44 private File getConfigurationLocation() {
45 if (configurationDirectory == null) {
46 Location location = Platform.getConfigurationLocation();
47 if (location != null) {
48 URL configURL = location.getURL();
49 if (configURL != null && configURL.getProtocol().startsWith("file")) { configurationDirectory = new File (configURL.getFile(), PLUGIN_ID);
51 if (configurationDirectory != null && !configurationDirectory.exists()) {
52 configurationDirectory.mkdirs();
53 }
54 }
55 }
56 }
57 return configurationDirectory;
58 }
59
60 public void saveExtensionCount(int count) {
61 XMLMemento writeMemento = XMLMemento.createWriteRoot(ROOT);
62 writeMemento.putInteger(INTROCOUNT, count);
63 saveMemento(writeMemento, EXTENSION_COUNT_XML);
64 }
65
66 public int getExtensionCount() {
67 XMLMemento readMemento = getReadMemento(EXTENSION_COUNT_XML);
68 if (readMemento == null) {
69 return NO_STATE;
70 }
71
72 Integer extensionCount = readMemento.getInteger(INTROCOUNT);
73 if (extensionCount == null) {
74 return NO_STATE;
75 }
76
77 return extensionCount.intValue();
78 }
79
80 public void saveContributors(Set contributors) {
81 XMLMemento writeMemento = XMLMemento.createWriteRoot(ROOT);
82 for (Iterator iter = contributors.iterator(); iter.hasNext();) {
83 IMemento childMemento = writeMemento.createChild(CONTRIBUTOR);
84 childMemento.putString(NAME, (String )iter.next());
85 }
86 saveMemento(writeMemento, EXTENSION_NAMES_XML);
87 }
88
89 public Set getContributors() {
90 Set contributors = new HashSet ();
91 XMLMemento readMemento = getReadMemento(EXTENSION_NAMES_XML);
92 if (readMemento == null) {
93 return contributors;
94 }
95 IMemento[] children = readMemento.getChildren(CONTRIBUTOR);
96 for (int c = 0; c < children.length; c++ ) {
97 contributors.add(children[c].getString(NAME));
98 }
99 return contributors;
100 }
101
102 private XMLMemento getReadMemento(String filename) {
103 XMLMemento memento;
104 InputStreamReader reader = null;
105
106 try {
107 final File stateFile = getStateFile(filename);
108
109 FileInputStream input = new FileInputStream (stateFile);
110 reader = new InputStreamReader (input, "utf-8"); memento = XMLMemento.createReadRoot(reader);
112
113
114 } catch (FileNotFoundException e) {
115 memento = null;
116 } catch (Exception e) {
118 memento = null;
120 } finally {
121 try {
122 if (reader != null)
123 reader.close();
124 } catch (IOException e) {
125 }
127 }
128 return memento;
129 }
130
131 private void saveMemento(XMLMemento memento, String filename) {
132 File stateFile = getStateFile(filename);
134 OutputStreamWriter writer = null;
135 try {
136 FileOutputStream stream = new FileOutputStream (stateFile);
137 writer = new OutputStreamWriter (stream, "utf-8"); memento.save(writer);
139 } catch (IOException e) {
140 stateFile.delete();
141 } finally {
142 try {
143 if (writer != null)
144 writer.close();
145 } catch (IOException e) {
146 }
147 }
148 }
149
150 private File getStateFile(String filename) {
151 if (getConfigurationLocation() == null) {
152 return null;
153 }
154 File stateFile = new File (getConfigurationLocation(), filename);
155 return stateFile;
156 }
157
158 public Set findNewContributors(Set contributors, Set previousContributors) {
159 Set result = new HashSet (contributors);
160 for (Iterator iter = previousContributors.iterator(); iter.hasNext();) {
161 result.remove(iter.next());
162 }
163 return result;
164 }
165
166 public void deleteStateFiles() {
167 try {
168 File stateFile = new File (getConfigurationLocation(), EXTENSION_COUNT_XML);
169 stateFile.delete();
170 stateFile = new File (getConfigurationLocation(), EXTENSION_NAMES_XML);
171 stateFile.delete();
172 } catch (RuntimeException e) {
173 }
174 }
175
176 }
177 |
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