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Code Issues Releases Wiki Activity

Added code to upgrade settings on import

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This allows us to import files with an outdated content version, then
upgrade the settings to the current content version.
This commit is contained in:
cketti 2011-12-11 04:57:47 +01:00
parent d57e684296
commit 18a58e2872
7 changed files with 192 additions and 28 deletions
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9
src/com/fsck/k9/preferences/AccountSettings.java
View File

@ -4,6 +4,7 @@ import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import android.content.SharedPreferences;
@ -18,6 +19,7 @@ import com.fsck.k9.preferences.Settings.*;
public class AccountSettings {
public static final Map<String, TreeMap<Integer, SettingsDescription>> SETTINGS;
public static final Map<Integer, SettingsUpgrader> UPGRADERS;
static {
Map<String, TreeMap<Integer, SettingsDescription>> s =
@ -204,6 +206,9 @@ public class AccountSettings {
));
SETTINGS = Collections.unmodifiableMap(s);
Map<Integer, SettingsUpgrader> u = new HashMap<Integer, SettingsUpgrader>();
UPGRADERS = Collections.unmodifiableMap(u);
}
public static Map<String, String> validate(int version, Map<String, String> importedSettings,
@ -211,6 +216,10 @@ public class AccountSettings {
return Settings.validate(version, SETTINGS, importedSettings, useDefaultValues);
}
public static Set<String> upgrade(int version, Map<String, String> validatedSettings) {
return Settings.upgrade(version, UPGRADERS, SETTINGS, validatedSettings);
}
public static Map<String, String> getAccountSettings(SharedPreferences storage, String uuid) {
Map<String, String> result = new HashMap<String, String>();
String prefix = uuid + ".";

9
src/com/fsck/k9/preferences/FolderSettings.java
View File

@ -4,6 +4,7 @@ import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import android.content.SharedPreferences;
@ -13,6 +14,7 @@ import com.fsck.k9.preferences.Settings.*;
public class FolderSettings {
public static final Map<String, TreeMap<Integer, SettingsDescription>> SETTINGS;
public static final Map<Integer, SettingsUpgrader> UPGRADERS;
static {
Map<String, TreeMap<Integer, SettingsDescription>> s =
@ -35,6 +37,9 @@ public class FolderSettings {
));
SETTINGS = Collections.unmodifiableMap(s);
Map<Integer, SettingsUpgrader> u = new HashMap<Integer, SettingsUpgrader>();
UPGRADERS = Collections.unmodifiableMap(u);
}
public static Map<String, String> validate(int version, Map<String, String> importedSettings,
@ -42,6 +47,10 @@ public class FolderSettings {
return Settings.validate(version, SETTINGS, importedSettings, useDefaultValues);
}
public static Set<String> upgrade(int version, Map<String, String> validatedSettings) {
return Settings.upgrade(version, UPGRADERS, SETTINGS, validatedSettings);
}
public static Map<String, String> getFolderSettings(SharedPreferences storage, String uuid,
String folderName) {
Map<String, String> result = new HashMap<String, String>();

9
src/com/fsck/k9/preferences/GlobalSettings.java
View File

@ -6,6 +6,7 @@ import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import android.content.SharedPreferences;
@ -19,6 +20,7 @@ import com.fsck.k9.preferences.Settings.*;
public class GlobalSettings {
public static final Map<String, TreeMap<Integer, SettingsDescription>> SETTINGS;
public static final Map<Integer, SettingsUpgrader> UPGRADERS;
static {
Map<String, TreeMap<Integer, SettingsDescription>> s =
@ -191,12 +193,19 @@ public class GlobalSettings {
));
SETTINGS = Collections.unmodifiableMap(s);
Map<Integer, SettingsUpgrader> u = new HashMap<Integer, SettingsUpgrader>();
UPGRADERS = Collections.unmodifiableMap(u);
}
public static Map<String, String> validate(int version, Map<String, String> importedSettings) {
return Settings.validate(version, SETTINGS, importedSettings, false);
}
public static Set<String> upgrade(int version, Map<String, String> validatedSettings) {
return Settings.upgrade(version, UPGRADERS, SETTINGS, validatedSettings);
}
public static Map<String, String> getGlobalSettings(SharedPreferences storage) {
Map<String, String> result = new HashMap<String, String>();
for (String key : SETTINGS.keySet()) {

9
src/com/fsck/k9/preferences/IdentitySettings.java
View File

@ -4,6 +4,7 @@ import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import android.content.SharedPreferences;
@ -15,6 +16,7 @@ import com.fsck.k9.preferences.Settings.*;
public class IdentitySettings {
public static final Map<String, TreeMap<Integer, SettingsDescription>> SETTINGS;
public static final Map<Integer, SettingsUpgrader> UPGRADERS;
static {
Map<String, TreeMap<Integer, SettingsDescription>> s =
@ -31,6 +33,9 @@ public class IdentitySettings {
));
SETTINGS = Collections.unmodifiableMap(s);
Map<Integer, SettingsUpgrader> u = new HashMap<Integer, SettingsUpgrader>();
UPGRADERS = Collections.unmodifiableMap(u);
}
public static Map<String, String> validate(int version, Map<String, String> importedSettings,
@ -38,6 +43,10 @@ public class IdentitySettings {
return Settings.validate(version, SETTINGS, importedSettings, useDefaultValues);
}
public static Set<String> upgrade(int version, Map<String, String> validatedSettings) {
return Settings.upgrade(version, UPGRADERS, SETTINGS, validatedSettings);
}
public static Map<String, String> getIdentitySettings(SharedPreferences storage, String uuid,
int identityIndex) {
Map<String, String> result = new HashMap<String, String>();

98
src/com/fsck/k9/preferences/Settings.java
View File

@ -2,7 +2,9 @@ package com.fsck.k9.preferences;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.Map.Entry;
@ -13,7 +15,6 @@ import com.fsck.k9.K9;
/*
* TODO:
* - add support for different settings versions (validate old version and upgrade to new format)
* - use the default values defined in GlobalSettings and AccountSettings when creating new
* accounts
* - think of a better way to validate enums than to use the resource arrays (i.e. get rid of
@ -83,6 +84,82 @@ public class Settings {
return validatedSettings;
}
/**
* Upgrade settings using the settings structure and/or special upgrade code.
*
* @param version
* The content version of the settings in {@code validatedSettings}.
* @param upgraders
* A map of {@link SettingsUpgrader}s for nontrivial settings upgrades.
* @param settings
* The structure describing the different settings, possibly containing multiple
* versions.
* @param validatedSettings
* The settings as returned by {@link Settings#validate(int, Map, Map, boolean)}.
* This map is modified and contains the upgraded settings when this method returns.
*
* @return A set of setting names that were removed during the upgrade process or {@code null}
* if none were removed.
*/
public static Set<String> upgrade(int version, Map<Integer, SettingsUpgrader> upgraders,
Map<String, TreeMap<Integer, SettingsDescription>> settings,
Map<String, String> validatedSettings) {
Map<String, String> upgradedSettings = validatedSettings;
Set<String> deletedSettings = null;
for (int toVersion = version + 1; toVersion <= VERSION; toVersion++) {
// Check if there's an SettingsUpgrader for that version
SettingsUpgrader upgrader = upgraders.get(toVersion);
if (upgrader != null) {
deletedSettings = upgrader.upgrade(upgradedSettings);
}
// Deal with settings that don't need special upgrade code
for (Entry<String, TreeMap<Integer, SettingsDescription>> versions :
settings.entrySet()) {
String settingName = versions.getKey();
TreeMap<Integer, SettingsDescription> versionedSettings = versions.getValue();
// Handle newly added settings
if (versionedSettings.firstKey().intValue() == toVersion) {
// Check if it was already added to upgradedSettings by the SettingsUpgrader
if (!upgradedSettings.containsKey(settingName)) {
// Insert default value to upgradedSettings
SettingsDescription setting = versionedSettings.firstEntry().getValue();
Object defaultValue = setting.getDefaultValue();
upgradedSettings.put(settingName, setting.toString(defaultValue));
if (K9.DEBUG) {
String prettyValue = setting.toPrettyString(defaultValue);
Log.v(K9.LOG_TAG, "Added new setting \"" + settingName +
"\" with default value \"" + prettyValue + "\"");
}
}
}
// Handle removed settings
Entry<Integer, SettingsDescription> lastEntry = versionedSettings.lastEntry();
if (lastEntry.getKey().intValue() == toVersion && lastEntry.getValue() == null) {
upgradedSettings.remove(settingName);
if (deletedSettings == null) {
deletedSettings = new HashSet<String>();
}
deletedSettings.add(settingName);
if (K9.DEBUG) {
Log.v(K9.LOG_TAG, "Removed setting \"" + settingName + "\"");
}
}
}
}
return deletedSettings;
}
/**
* Creates a {@link TreeMap} linking version numbers to {@link SettingsDescription} instances.
*
@ -234,6 +311,25 @@ public class Settings {
}
}
/**
* Used for a nontrivial settings upgrade.
*
* @see Settings#upgrade(int, Map, Map, Map)
*/
public interface SettingsUpgrader {
/**
* Upgrade the provided settings.
*
* @param settings
* The settings to upgrade. This map is modified and contains the upgraded
* settings when this method returns.
*
* @return A set of setting names that were removed during the upgrade process or
* {@code null} if none were removed.
*/
public Set<String> upgrade(Map<String, String> settings);
}
/**
* A string setting.

11
src/com/fsck/k9/preferences/SettingsExporter.java
View File

@ -173,6 +173,11 @@ public class SettingsExporter {
String key = versionedSetting.getKey();
String valueString = (String) prefs.get(key);
SettingsDescription setting = versionedSetting.getValue().lastEntry().getValue();
if (setting == null) {
// Setting was removed.
continue;
}
if (valueString != null) {
try {
Object value = setting.fromString(valueString);
@ -319,6 +324,7 @@ public class SettingsExporter {
if (versionedSetting != null) {
SettingsDescription setting = versionedSetting.lastEntry().getValue();
if (setting != null) {
// Only export account settings that can be found in AccountSettings.SETTINGS
try {
Object value = setting.fromString(valueString);
@ -331,6 +337,7 @@ public class SettingsExporter {
}
}
}
}
serializer.endTag(null, SETTINGS_ELEMENT);
if (identities.size() > 0) {
@ -411,6 +418,7 @@ public class SettingsExporter {
if (versionedSetting != null) {
SettingsDescription setting = versionedSetting.lastEntry().getValue();
if (setting != null) {
// Only write settings that have an entry in IdentitySettings.SETTINGS
try {
Object value = setting.fromString(valueString);
@ -423,6 +431,7 @@ public class SettingsExporter {
}
}
}
}
serializer.endTag(null, SETTINGS_ELEMENT);
serializer.endTag(null, IDENTITY_ELEMENT);
@ -460,6 +469,7 @@ public class SettingsExporter {
if (versionedSetting != null) {
SettingsDescription setting = versionedSetting.lastEntry().getValue();
if (setting != null) {
// Only write settings that have an entry in FolderSettings.SETTINGS
try {
Object value = setting.fromString(valueString);
@ -472,6 +482,7 @@ public class SettingsExporter {
}
}
}
}
serializer.endTag(null, FOLDER_ELEMENT);
}

21
src/com/fsck/k9/preferences/SettingsImporter.java
View File

@ -303,9 +303,15 @@ public class SettingsImporter {
private static void importGlobalSettings(SharedPreferences storage,
SharedPreferences.Editor editor, int contentVersion, ImportedSettings settings) {
// Validate global settings
Map<String, String> validatedSettings = GlobalSettings.validate(contentVersion,
settings.settings);
// Upgrade global settings to current content version
if (contentVersion != Settings.VERSION) {
GlobalSettings.upgrade(contentVersion, validatedSettings);
}
// Use current global settings as base and overwrite with validated settings read from the
// import file.
Map<String, String> mergedSettings =
@ -396,6 +402,11 @@ public class SettingsImporter {
AccountSettings.validate(contentVersion, account.settings.settings,
!mergeImportedAccount);
// Upgrade account settings to current content version
if (contentVersion != Settings.VERSION) {
AccountSettings.upgrade(contentVersion, validatedSettings);
}
// Merge account settings if necessary
Map<String, String> writeSettings;
if (mergeImportedAccount) {
@ -448,6 +459,11 @@ public class SettingsImporter {
Map<String, String> validatedSettings =
FolderSettings.validate(contentVersion, folder.settings.settings, !overwrite);
// Upgrade folder settings to current content version
if (contentVersion != Settings.VERSION) {
FolderSettings.upgrade(contentVersion, validatedSettings);
}
// Merge folder settings if necessary
Map<String, String> writeSettings;
if (overwrite) {
@ -537,6 +553,11 @@ public class SettingsImporter {
Map<String, String> validatedSettings = IdentitySettings.validate(
contentVersion, identity.settings.settings, !mergeSettings);
// Upgrade identity settings to current content version
if (contentVersion != Settings.VERSION) {
IdentitySettings.upgrade(contentVersion, validatedSettings);
}
// Merge identity settings if necessary
Map<String, String> writeSettings;
if (mergeSettings) {