下面列出了java.util.Hashtable#isEmpty ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public static AttributeValues
fromSerializableHashtable(Hashtable<Object, Object> ht)
{
AttributeValues result = new AttributeValues();
if (ht != null && !ht.isEmpty()) {
for (Map.Entry<Object, Object> e: ht.entrySet()) {
Object key = e.getKey();
Object val = e.getValue();
if (key.equals(DEFINED_KEY)) {
result.defineAll(((Integer)val).intValue());
} else {
try {
EAttribute ea =
EAttribute.forAttribute((Attribute)key);
if (ea != null) {
result.set(ea, val);
}
}
catch (ClassCastException ex) {
}
}
}
}
return result;
}
private Set<String> removeFromLocationToPids(ServiceReference<?> sr)
{
HashSet<String> res = new HashSet<String>();
if (sr != null) {
Bundle bundle = sr.getBundle();
final String bundleLocation = bundle.getLocation();
final Hashtable<String, TreeSet<ServiceReference<?>>> pidsForLocation =
locationToPids.get(bundleLocation);
for (final Iterator<Entry<String, TreeSet<ServiceReference<?>>>> it =
pidsForLocation.entrySet().iterator(); it.hasNext();) {
final Entry<String, TreeSet<ServiceReference<?>>> entry = it.next();
TreeSet<ServiceReference<?>> ssrs = entry.getValue();
if (ssrs.remove(sr)) {
res.add(entry.getKey());
if (ssrs.isEmpty()) {
it.remove();
}
}
}
if (pidsForLocation.isEmpty()) {
locationToPids.remove(bundleLocation);
}
}
return res;
}
public static AttributeValues
fromSerializableHashtable(Hashtable<Object, Object> ht)
{
AttributeValues result = new AttributeValues();
if (ht != null && !ht.isEmpty()) {
for (Map.Entry<Object, Object> e: ht.entrySet()) {
Object key = e.getKey();
Object val = e.getValue();
if (key.equals(DEFINED_KEY)) {
result.defineAll(((Integer)val).intValue());
} else {
try {
EAttribute ea =
EAttribute.forAttribute((Attribute)key);
if (ea != null) {
result.set(ea, val);
}
}
catch (ClassCastException ex) {
}
}
}
}
return result;
}
@SuppressWarnings("unchecked")
private static Hashtable<String, Object> convertNativeConfig(
Hashtable<String, Object> stanzaTable) throws IOException {
// convert SCDynamicStore realm structure to Java realm structure
Hashtable<String, ?> realms =
(Hashtable<String, ?>) stanzaTable.get("realms");
if (realms == null || realms.isEmpty()) {
throw new IOException(
"SCDynamicStore contains an empty Kerberos setting");
}
stanzaTable.remove("realms");
Hashtable<String, Object> realmsTable = convertRealmConfigs(realms);
stanzaTable.put("realms", realmsTable);
WrapAllStringInVector(stanzaTable);
if (DEBUG) System.out.println("stanzaTable : " + stanzaTable);
return stanzaTable;
}
public static AttributeValues
fromSerializableHashtable(Hashtable<Object, Object> ht)
{
AttributeValues result = new AttributeValues();
if (ht != null && !ht.isEmpty()) {
for (Map.Entry<Object, Object> e: ht.entrySet()) {
Object key = e.getKey();
Object val = e.getValue();
if (key.equals(DEFINED_KEY)) {
result.defineAll(((Integer)val).intValue());
} else {
try {
EAttribute ea =
EAttribute.forAttribute((Attribute)key);
if (ea != null) {
result.set(ea, val);
}
}
catch (ClassCastException ex) {
}
}
}
}
return result;
}
public static DataSource lookupDataSource(String dataSourceName, final Hashtable<Object, Object> jndiProperties) {
try {
if (jndiProperties == null || jndiProperties.isEmpty()) {
return (DataSource) InitialContext.doLookup(dataSourceName);
}
final InitialContext context = new InitialContext(jndiProperties);
return (DataSource) context.doLookup(dataSourceName);
} catch (Exception e) {
throw new RuntimeException("Error in looking up data source: " + e.getMessage(), e);
}
}
/**
* java.util.Hashtable#isEmpty()
*/
public void test_isEmpty() {
// Test for method boolean java.util.Hashtable.isEmpty()
assertTrue("isEmpty returned incorrect value", !ht10.isEmpty());
assertTrue("isEmpty returned incorrect value",
new java.util.Hashtable().isEmpty());
final Hashtable ht = new Hashtable();
ht.put("0", "");
Thread t1 = new Thread() {
public void run() {
while (!ht.isEmpty())
;
ht.put("final", "");
}
};
t1.start();
for (int i = 1; i < 10000; i++) {
synchronized (ht) {
ht.remove(String.valueOf(i - 1));
ht.put(String.valueOf(i), "");
}
int size;
if ((size = ht.size()) != 1) {
String result = "Size is not 1: " + size + " " + ht;
// terminate the thread
ht.clear();
fail(result);
}
}
// terminate the thread
ht.clear();
}
/**
* Call user data handlers when a node is deleted (finalized)
* @param n The node this operation applies to.
* @param c The copy node or null.
* @param operation The operation - import, clone, or delete.
* @param handlers Data associated with n.
*/
void callUserDataHandlers(Node n, Node c, short operation,Hashtable userData) {
if (userData == null || userData.isEmpty()) {
return;
}
Enumeration keys = userData.keys();
while (keys.hasMoreElements()) {
String key = (String) keys.nextElement();
UserDataRecord r = (UserDataRecord) userData.get(key);
if (r.fHandler != null) {
r.fHandler.handle(operation, key, r.fData, n, c);
}
}
}
@Override
public float getProjection(String areaAbbv, String clasfCode, String majorCode) {
if (iAreaClasfMajor2Proj.isEmpty()) return 1.0f;
Hashtable<String,Hashtable<String, Float>> clasf2major2proj = (areaAbbv == null ? null : iAreaClasfMajor2Proj.get(areaAbbv));
if (clasf2major2proj == null || clasf2major2proj.isEmpty()) return 1.0f;
Hashtable<String, Float> major2proj = (clasfCode == null ? null : clasf2major2proj.get(clasfCode));
if (major2proj == null) return 1.0f;
Float projection = (majorCode == null ? null : major2proj.get(majorCode));
if (projection == null)
projection = major2proj.get("");
return (projection == null ? 1.0f : projection);
}
private float getProjection(Hashtable<String,HashMap<String, Float>> clasf2major2proj, String majorCode, String clasfCode) {
if (clasf2major2proj == null || clasf2major2proj.isEmpty()) return 1.0f;
HashMap<String, Float> major2proj = clasf2major2proj.get(clasfCode);
if (major2proj == null) return 1.0f;
Float projection = major2proj.get(majorCode);
if (projection == null)
projection = major2proj.get("");
return (projection == null ? 1.0f : projection);
}
public static DataSource lookupDataSource(String dataSourceName,
final Hashtable<Object, Object> jndiProperties) {
try {
if (jndiProperties == null || jndiProperties.isEmpty()) {
return (DataSource) InitialContext.doLookup(dataSourceName);
}
final InitialContext context = new InitialContext(jndiProperties);
return (DataSource) context.lookup(dataSourceName);
} catch (Exception e) {
throw new RuntimeException("Error in looking up data source: " + e.getMessage(), e);
}
}
/**
* Returns the HTML text for the list of services deployed.
* This can be delegated to another Class as well
* where it will handle more options of GET messages.
*
* @param prefix to be used for the Service names
* @return the HTML to be displayed as a String
*/
protected String getServicesHTML(String prefix) {
Map services = cfgCtx.getAxisConfiguration().getServices();
Hashtable erroneousServices = cfgCtx.getAxisConfiguration().getFaultyServices();
boolean servicesFound = false;
StringBuffer resultBuf = new StringBuffer();
resultBuf.append("<html><head><title>Axis2: Services</title></head>" + "<body>");
if ((services != null) && !services.isEmpty()) {
servicesFound = true;
resultBuf.append("<h2>" + "Deployed services" + "</h2>");
for (Object service : services.values()) {
AxisService axisService = (AxisService) service;
Parameter isHiddenService = axisService.getParameter(
NhttpConstants.HIDDEN_SERVICE_PARAM_NAME);
Parameter isAdminService = axisService.getParameter("adminService");
boolean isClientSide = axisService.isClientSide();
boolean isSkippedService = (isHiddenService != null &&
JavaUtils.isTrueExplicitly(isHiddenService.getValue())) || (isAdminService != null &&
JavaUtils.isTrueExplicitly(isAdminService.getValue())) || isClientSide;
if (axisService.getName().startsWith("__") || isSkippedService) {
continue; // skip private services
}
Iterator iterator = axisService.getOperations();
resultBuf.append("<h3><a href=\"").append(prefix).append(axisService.getName()).append(
"?wsdl\">").append(axisService.getName()).append("</a></h3>");
if (iterator.hasNext()) {
resultBuf.append("Available operations <ul>");
for (; iterator.hasNext();) {
AxisOperation axisOperation = (AxisOperation) iterator.next();
resultBuf.append("<li>").append(
axisOperation.getName().getLocalPart()).append("</li>");
}
resultBuf.append("</ul>");
} else {
resultBuf.append("No operations specified for this service");
}
}
}
if ((erroneousServices != null) && !erroneousServices.isEmpty()) {
servicesFound = true;
resultBuf.append("<hr><h2><font color=\"blue\">Faulty Services</font></h2>");
Enumeration faultyservices = erroneousServices.keys();
while (faultyservices.hasMoreElements()) {
String faultyserviceName = (String) faultyservices.nextElement();
resultBuf.append("<h3><font color=\"blue\">").append(
faultyserviceName).append("</font></h3>");
}
}
if (!servicesFound) {
resultBuf.append("<h2>There are no services deployed</h2>");
}
resultBuf.append("</body></html>");
return resultBuf.toString();
}
/**
* Sends a File Message containing an image file.
* Also requests thumbnails to be generated in specified sizes.
*
* @param uri The URI of the image, which in this case is received through an Intent request.
*/
private void sendFileWithThumbnail(Uri uri) {
if (mChannel == null) {
return;
}
// Specify two dimensions of thumbnails to generate
List<FileMessage.ThumbnailSize> thumbnailSizes = new ArrayList<>();
thumbnailSizes.add(new FileMessage.ThumbnailSize(240, 240));
thumbnailSizes.add(new FileMessage.ThumbnailSize(320, 320));
Hashtable<String, Object> info = FileUtils.getFileInfo(getActivity(), uri);
if (info == null || info.isEmpty()) {
Toast.makeText(getActivity(), getString(R.string.wrong_file_info), Toast.LENGTH_LONG).show();
return;
}
final String name;
if (info.containsKey("name")) {
name = (String) info.get("name");
} else {
name = "Sendbird File";
}
final String path = (String) info.get("path");
final File file = new File(path);
final String mime = (String) info.get("mime");
final int size = (int) info.get("size");
if (path == null || path.equals("")) {
Toast.makeText(getActivity(), getString(R.string.wrong_file_path), Toast.LENGTH_LONG).show();
} else {
BaseChannel.SendFileMessageHandler fileMessageHandler = new BaseChannel.SendFileMessageHandler() {
@Override
public void onSent(FileMessage fileMessage, SendBirdException e) {
mMessageCollection.handleSendMessageResponse(fileMessage, e);
mMessageCollection.fetchAllNextMessages(null);
if (e != null) {
Log.d("MyTag", "onSent: " + getActivity());
if (getActivity() != null) {
Toast.makeText(getActivity(), getString(R.string.sendbird_error_with_code, e.getCode(), e.getMessage()), Toast.LENGTH_SHORT).show();
}
}
}
};
// Send image with thumbnails in the specified dimensions
FileMessage tempFileMessage = mChannel.sendFileMessage(file, name, mime, size, "", null, thumbnailSizes, fileMessageHandler);
mChatAdapter.addTempFileMessageInfo(tempFileMessage, uri);
if (mMessageCollection != null) {
mMessageCollection.appendMessage(tempFileMessage);
}
}
}
public void Compare(String p_CFHT_strFilename, Hashtable<Object, Integer> p_CFHT_htHashTable) {
try {
int nRecordNumber = 0;
int nCount = 1;
int nBufferLength = 12;
int nKey;
long lGetValue;
long lCount;
boolean blnKeyIsThere;
Object objGetValue;
Hashtable<Object, Integer> htHashTable = p_CFHT_htHashTable;
System.out.println("I am comparing the file with the hashtable");
// Get a channel for the file and provide a place
// in memory to put the bytes with a buffer
File f = new File(p_CFHT_strFilename);
FileInputStream fis = new FileInputStream(f);
FileChannel fc = fis.getChannel();
ByteBuffer bb = java.nio.ByteBuffer.allocate(nBufferLength);
// while we are not at the end of the file
while (nCount != 0 && nCount != -1) {
// Starting at byte number (nRecordNumber*nBufferLength)
// read the next nBufferLength bytes from the file into
// buffer bb and rewind to the beginning of the buffer
nCount = fc.read(bb, nRecordNumber * nBufferLength);
bb.rewind();
// If we are not at the end of the file
if (nCount != -1 && nCount != 0) {
// Read the first 4 bytes and then the next 8 bytes and
// print the results to the screen.
nKey = bb.getInt();
lCount = bb.getLong();
// Checking the Hashtable to see if the random number is there
blnKeyIsThere = htHashTable.containsKey(" " + nKey);
// If the random number is there then get the value
// associated with this
// key. Compare this value with the occurences value in the
// file. If they are
// the same then increase the nMatches count, if they are
// different print their
// values to the screen and increase the differences count.
// In each case
// remove the key from the hashtable. If the random number
// is not there
// then print this to the screen also.
if (blnKeyIsThere) {
objGetValue = htHashTable.get(" " + nKey);
lGetValue = Long.parseLong(objGetValue.toString());
if (lCount == lGetValue) {
nMatches++;
htHashTable.remove(" " + nKey);
} else {
nOccurenceDiffs++;
htHashTable.remove(" " + nKey);
}
} else {
nNotInHashTable++;
}
}
// clear the buffer and increment the nRecordNumber (this will
// ensure the next 12 bytes are read into the buffer.
bb.clear();
nRecordNumber++;
}
// close the FileInputStream (this consequently closes the
// FileChannel
fis.close();
// Check to see if there are any keys left in the hashtable. If
// there aren't
// then print all the results to the screen, if there are then
// calculate how
// many keys are left in the hashtable and print all the results to
// the screen.
if (htHashTable.isEmpty()) {
nTotalDiffs = nOccurenceDiffs + nNotInHashTable;
} else {
nNotInFile = htHashTable.size();
nTotalDiffs = nOccurenceDiffs + nNotInHashTable + nNotInFile;
}
} catch (IOException e) {
System.out.println("Error occured in ComparingFileHashTable class: " + e);
}
}
/**
* Copies all values from the specified attribute table.
* If some attribute is exist its value should be overridden.
*
* @param table the attribute table with new values
*/
private void addTable(Hashtable<String, Object> table) {
if ((table != null) && !table.isEmpty()) {
getTable().putAll(table);
}
}
/**
* Copies all values from the specified attribute table.
* If some attribute is exist its value should be overridden.
*
* @param table the attribute table with new values
*/
private void addTable(Hashtable<String, Object> table) {
if ((table != null) && !table.isEmpty()) {
getTable().putAll(table);
}
}
/**
* Copies all values from the specified attribute table.
* If some attribute is exist its value should be overridden.
*
* @param table the attribute table with new values
*/
private void addTable(Hashtable<String, Object> table) {
if ((table != null) && !table.isEmpty()) {
getTable().putAll(table);
}
}
/**
* Copies all values from the specified attribute table.
* If some attribute is exist its value should be overridden.
*
* @param table the attribute table with new values
*/
private void addTable(Hashtable<String, Object> table) {
if ((table != null) && !table.isEmpty()) {
getTable().putAll(table);
}
}
/**
* Copies all values from the specified attribute table.
* If some attribute is exist its value should be overridden.
*
* @param table the attribute table with new values
*/
private void addTable(Hashtable<String, Object> table) {
if ((table != null) && !table.isEmpty()) {
getTable().putAll(table);
}
}
/**
* Copies all values from the specified attribute table.
* If some attribute is exist its value should be overridden.
*
* @param table the attribute table with new values
*/
private void addTable(Hashtable<String, Object> table) {
if ((table != null) && !table.isEmpty()) {
getTable().putAll(table);
}
}