/**
* Constructor for class BackupAssociation
*
* @param assoc given Association (not null)
* @param regLeve given regLevel
*/
protected BackupAssociation(Association assoc, int regLevel) {
curMimeType = assoc.getMimeType();
Iterator iter = null;
List temFileExtList = assoc.getFileExtList();
if (temFileExtList != null) {
iter = temFileExtList.iterator();
}
if (iter != null) {
if (iter.hasNext()) {
curFileExt = (String) iter.next();
}
}
if (curMimeType != null) {
curMimeTypeExisted = WinRegistryUtil.isMimeTypeExist(curMimeType, regLevel);
} else {
curMimeTypeExisted = false;
}
if (curFileExt != null) {
curFileExtExisted = WinRegistryUtil.isFileExtExist(curFileExt, regLevel);
} else {
curFileExtExisted = false;
}
if (curMimeTypeExisted) {
backupFileExt = WinRegistryUtil.getFileExtByMimeType(curMimeType, regLevel);
}
if (curFileExtExisted) {
backupClassID = WinRegistryUtil.getClassIDByFileExt(curFileExt, regLevel);
backupMimeType = WinRegistryUtil.getMimeTypeByFileExt(curFileExt, regLevel);
}
}
/**
* 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.");
}
}
/**
* Checks whether the given assocation is valid for unregistration. If both the mimeType and
* fileExtensionList field is null, throw exception.
*
* @param assoc a given Association object.
* @param level a given MIME database level.
* @throws IllegalArgumentException if the given association is not valid for unregistration.
*/
public void checkAssociationValidForUnregistration(Association assoc)
throws IllegalArgumentException {
boolean isFileExtListEmpty = true;
if (assoc.getFileExtList() != null) {
isFileExtListEmpty = assoc.getFileExtList().isEmpty();
}
if ((assoc.getMimeType() == null) && isFileExtListEmpty) {
throw new IllegalArgumentException(
"The given association is invalid. It should "
+ "specify both the mimeType and fileExtensionList fields to perform this operation.");
}
}
/**
* Checks whether the given assocation already existed in Windows registry.
*
* <PRE>
* The evaluation will based on the following rule:
* 1. mimetype == null && fileExt == null
* return false
* 2. mimetype == null && fileExt != null
* return !(fileExt existed in the reg table)
* 3. mimetype != null && fileExt == null
* return !(mimetype existed in the reg table)
* 4. mimetype != null && fileExt != null
* return ( (mimetype existed in the reg table) &&
* (fileExt existed in the reg table) &&
* (getFileExtByMimeType(mimetype) == fileExt) &&
* (getMimeTypeByFileExt(fileExt) == mimetype) )
* </PRE>
*
* @param assoc given association (not null)
* @param regLevel given registry level
* @return true if the given association existed
*/
public boolean isAssociationExist(Association assoc, int regLevel) {
String temFileExt = null;
String temMimeType = assoc.getMimeType();
Iterator temFileExtIter;
if (assoc.getFileExtList() != null) {
temFileExtIter = assoc.getFileExtList().iterator();
} else {
temFileExtIter = null;
}
if (temFileExtIter != null) {
if (temFileExtIter.hasNext()) {
temFileExt = (String) temFileExtIter.next();
}
}
// Check if there is the same file extension define in Win2k
// HKEY_CURRENT_USER\\software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts
if (WinRegistryUtil.isWin2kUserDefinedFileExtExist(temFileExt)) {
return true;
}
if ((temMimeType == null) && (temFileExt == null)) {
return false;
} else if ((temMimeType == null) && (temFileExt != null)) {
return WinRegistryUtil.isFileExtExist(temFileExt, regLevel);
} else if ((temMimeType != null) && (temFileExt == null)) {
return WinRegistryUtil.isMimeTypeExist(temMimeType, regLevel);
} else {
String regMimeType = WinRegistryUtil.getMimeTypeByFileExt(temFileExt, regLevel);
String regFileExt = WinRegistryUtil.getFileExtByMimeType(temMimeType, regLevel);
return ((WinRegistryUtil.isMimeTypeExist(temMimeType, regLevel))
&& (WinRegistryUtil.isFileExtExist(temFileExt, regLevel))
&& (temFileExt == null ? regFileExt == null : temFileExt.equals(regFileExt))
&& (temMimeType == null ? regMimeType == null : temMimeType.equals(regMimeType)));
}
}