/**
* Checks whether the given assocation is valid for registration.
*
* <PRE>
* 1. The file extension list and mime type can't all be null
* 2. If any of the fileds: description, iconFile, actionList is not null,
* then fileExtensionList should not be empty
* </PRE>
*
* @param assoc a given Association object.
* @param level a given MIME database level.
* @throws IllegalArgumentException if the given association is not valid for registration.
*/
public void checkAssociationValidForRegistration(Association assoc)
throws IllegalArgumentException {
boolean isActionListEmpty = true;
boolean isFileExtensionEmpty = true;
boolean isValid = false;
// Check if actionlist is empty
if (assoc.getActionList() != null) {
isActionListEmpty = assoc.getActionList().isEmpty();
}
// Check if file extension list is empty
if (assoc.getFileExtList() != null) {
isFileExtensionEmpty = assoc.getFileExtList().isEmpty();
}
if (isFileExtensionEmpty && (assoc.getMimeType() == null)) {
isValid = false;
} else if ((assoc.getDescription() != null)
|| (assoc.getIconFileName() != null)
|| (!isActionListEmpty)) {
isValid = !isFileExtensionEmpty;
} else {
isValid = true;
}
if (!isValid) {
throw new IllegalArgumentException(
"The given association is invalid. It should "
+ "specify both the mimeType and fileExtensionList fields to perform this operation.");
}
}
/**
* Registers the given association info in the specified level.
*
* <PRE>
*
* The register process will following the rules below
* 1. mimetype == null && fileExt != null
* Since fileExt does not exist in this case
* 1.1 adds the fileExt
* 1.2 adds description, icon file and action list for this fileExt
* 2. mimetype != null && fileExt == null
* Since mimetype does not exist in this case
* just adds the mimetype in the reg table
* 3. mimetype != null && fileExt != null
* 3.1 Adds the mime type into the reg table if necessary
* 3.2 Adds the file extension into the reg table if necessary
* 3.3 Adds the description, icon file and action list for the fileExt
* 3.4 Sets the mutual reference of the mime type and file extension
* </PRE>
*
* @param assoc given association (not null)
* @param regLevel given registry level
*/
public void registerAssociation(Association assoc, int regLevel) throws RegisterFailedException {
// Note: Windows 98, Windows ME & Windows NT will only take care of registry information from
// LOCAL_MACHINE. Association, in this case, should only be written into LOCAL_MACHINE rather
// than the CURRENT_USER.
boolean isOldWindows = false;
String osName = System.getProperty("os.name").toLowerCase();
if ((osName.indexOf("98") != -1)
|| (osName.indexOf("me") != -1)
|| (osName.indexOf("nt") != -1)) {
isOldWindows = true;
}
if (isOldWindows) {
regLevel = AppConstants.SYSTEM_LEVEL;
}
BackupAssociation backupAssoc = new BackupAssociation(assoc, regLevel);
String curMimeType = backupAssoc.getCurMimeType();
String curFileExt = backupAssoc.getCurFileExt();
String curDescription = assoc.getDescription();
String curIconFileName = assoc.getIconFileName();
List curActionList = assoc.getActionList();
boolean curMimeTypeExisted = backupAssoc.getCurMimeTypeExisted();
boolean curFileExtExisted = backupAssoc.getCurFileExtExisted();
try {
if ((curMimeType == null) && (curFileExt != null)) {
WinRegistryUtil.addFileExt(curFileExt, regLevel);
if (curDescription != null) {
WinRegistryUtil.setDescriptionByFileExt(curDescription, curFileExt, regLevel);
}
if (curIconFileName != null) {
WinRegistryUtil.setIconFileNameByFileExt(curIconFileName, curFileExt, regLevel);
}
if (curActionList != null) {
WinRegistryUtil.setActionListByFileExt(curActionList, curFileExt, regLevel);
}
// Mark the classID generator field
WinRegistryUtil.markGeneratorByFileExt(curFileExt, regLevel);
} else if ((curMimeType != null) && (curFileExt == null)) {
WinRegistryUtil.addMimeType(curMimeType, regLevel);
} else if ((curMimeType != null) && (curFileExt != null)) {
if (!curMimeTypeExisted) {
WinRegistryUtil.addMimeType(curMimeType, regLevel);
}
if (!curFileExtExisted) {
WinRegistryUtil.addFileExt(curFileExt, regLevel);
}
if (curDescription != null) {
WinRegistryUtil.setDescriptionByFileExt(curDescription, curFileExt, regLevel);
}
if (curIconFileName != null) {
WinRegistryUtil.setIconFileNameByFileExt(curIconFileName, curFileExt, regLevel);
}
if (curActionList != null) {
WinRegistryUtil.setActionListByFileExt(curActionList, curFileExt, regLevel);
}
// Mark the classID generator field.
WinRegistryUtil.markGeneratorByFileExt(curFileExt, regLevel);
WinRegistryUtil.setMutualRef(curFileExt, curMimeType, regLevel);
}
} catch (RegisterFailedException e) { // Question write to file. log.
restoreAssociationRegistration(backupAssoc, regLevel);
throw e;
}
}