/**
* Get the target entry for a given patch element.
*
* @param element the patch element
* @return the patch entry
* @throws PatchingException
*/
protected PatchEntry resolveForElement(final PatchElement element) throws PatchingException {
assert state == State.NEW;
final PatchElementProvider provider = element.getProvider();
final String layerName = provider.getName();
final LayerType layerType = provider.getLayerType();
final Map<String, PatchEntry> map;
if (layerType == LayerType.Layer) {
map = layers;
} else {
map = addOns;
}
PatchEntry entry = map.get(layerName);
if (entry == null) {
final InstallationManager.MutablePatchingTarget target =
modification.resolve(layerName, layerType);
if (target == null) {
throw PatchMessages.MESSAGES.noSuchLayer(layerName);
}
entry = new PatchEntry(target, element);
map.put(layerName, entry);
}
// Maintain the most recent element
entry.updateElement(element);
return entry;
}
/**
* Backup all xml files in a given directory.
*
* @param source the source directory
* @param target the target directory
* @throws IOException for any error
*/
static void backupDirectory(final File source, final File target) throws IOException {
if (!target.exists()) {
if (!target.mkdirs()) {
throw PatchMessages.MESSAGES.cannotCreateDirectory(target.getAbsolutePath());
}
}
final File[] files = source.listFiles(CONFIG_FILTER);
for (final File file : files) {
final File t = new File(target, file.getName());
IoUtils.copyFile(file, t);
}
}
/**
* Write the patch.xml
*
* @param rollbackPatch the patch
* @param file the target file
* @throws IOException
*/
static void writePatch(final Patch rollbackPatch, final File file) throws IOException {
final File parent = file.getParentFile();
if (!parent.isDirectory()) {
if (!parent.mkdirs() && !parent.exists()) {
throw PatchMessages.MESSAGES.cannotCreateDirectory(file.getAbsolutePath());
}
}
try {
final OutputStream os = new FileOutputStream(file);
try {
PatchXml.marshal(os, rollbackPatch);
} finally {
IoUtils.safeClose(os);
}
} catch (XMLStreamException e) {
throw new IOException(e);
}
}