/**
* @param sourceFile File to read from
* @return List of String objects with the shas
*/
public static FileRequestFileContent readRequestFile(final File sourceFile) {
if (!sourceFile.isFile() || !(sourceFile.length() > 0)) {
return null;
}
Document d = null;
try {
d = XMLTools.parseXmlFile(sourceFile.getPath());
} catch (final Throwable t) {
logger.log(Level.SEVERE, "Exception in readRequestFile, during XML parsing", t);
return null;
}
if (d == null) {
logger.log(Level.SEVERE, "Could'nt parse the request file");
return null;
}
final Element rootNode = d.getDocumentElement();
if (rootNode.getTagName().equals(TAG_FrostFileRequestFile) == false) {
logger.severe(
"Error: xml request file does not contain the root tag '"
+ TAG_FrostFileRequestFile
+ "'");
return null;
}
final String timeStampStr = XMLTools.getChildElementsTextValue(rootNode, TAG_timestamp);
if (timeStampStr == null) {
logger.severe("Error: xml file does not contain the tag '" + TAG_timestamp + "'");
return null;
}
final long timestamp = Long.parseLong(timeStampStr);
final List<Element> nodelist = XMLTools.getChildElementsByTagName(rootNode, TAG_shaList);
if (nodelist.size() != 1) {
logger.severe("Error: xml request files must contain only one element '" + TAG_shaList + "'");
return null;
}
final Element rootShaNode = nodelist.get(0);
final List<String> shaList = new LinkedList<String>();
final List<Element> xmlKeys = XMLTools.getChildElementsByTagName(rootShaNode, TAG_sha);
for (final Element el : xmlKeys) {
final Text txtname = (Text) el.getFirstChild();
if (txtname == null) {
continue;
}
final String sha = txtname.getData();
shaList.add(sha);
}
final FileRequestFileContent content = new FileRequestFileContent(timestamp, shaList);
return content;
}
/**
* @param chkKeys List of String objects with the shas
* @param targetFile target file
* @return true if write was successful
*/
public static boolean writeRequestFile(
final FileRequestFileContent content, final File targetFile) {
final Document doc = XMLTools.createDomDocument();
if (doc == null) {
logger.severe("Error - writeRequestFile: factory could'nt create XML Document.");
return false;
}
final Element rootElement = doc.createElement(TAG_FrostFileRequestFile);
doc.appendChild(rootElement);
final Element timeStampElement = doc.createElement(TAG_timestamp);
final Text timeStampText = doc.createTextNode(Long.toString(content.getTimestamp()));
timeStampElement.appendChild(timeStampText);
rootElement.appendChild(timeStampElement);
final Element rootChkElement = doc.createElement(TAG_shaList);
rootElement.appendChild(rootChkElement);
for (final String chkKey : content.getShaStrings()) {
final Element nameElement = doc.createElement(TAG_sha);
final Text text = doc.createTextNode(chkKey);
nameElement.appendChild(text);
rootChkElement.appendChild(nameElement);
}
boolean writeOK = false;
try {
writeOK = XMLTools.writeXmlFile(doc, targetFile);
} catch (final Throwable t) {
logger.log(Level.SEVERE, "Exception in writeRequestFile/writeXmlFile", t);
}
return writeOK;
}
