本文整理了Java中org.javalite.common.Util.empty()方法的一些代码示例，展示了Util.empty()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Util.empty()方法的具体详情如下：
包路径：org.javalite.common.Util
类名称：Util
方法名：empty
[英]Returns true if collection is either null or empty.
[中]如果集合为null或空，则返回true。
代码示例来源：origin: javalite/activejdbc
/**
* Joins the items in array with a delimiter, and appends the result to StringBuilder.
*
* @param sb StringBuilder to append result to
* @param array array of items to join.
* @param delimiter delimiter to insert between elements of array.
*/
public static void join(StringBuilder sb, Object[] array, String delimiter) {
if (empty(array)) { return; }
sb.append(array[0]);
for (int i = 1; i < array.length; i++) {
sb.append(delimiter);
sb.append(array[i]);
}
}代码示例来源：origin: javalite/activejdbc
/**
* Joins the items in array with a delimiter.
*
* @param array array of items to join.
* @param delimiter delimiter to insert between elements of array.
* @return string with array elements separated by delimiter. There is no trailing delimiter in the string.
*/
public static String join(String[] array, String delimiter) {
if (empty(array)) { return ""; }
StringBuilder sb = new StringBuilder();
join(sb, array, delimiter);
return sb.toString();
}代码示例来源：origin: javalite/activejdbc
/**
* Looks for a localized property/message in <code>activejdbc_messages</code> bundle.
*
* @param key key of the property.
* @param locale locale of a bundle, or null for default locale
* @param params list of parameters for a message. The order of parameters in this list will correspond to the
* numeric order in the parameters listed in the message and has nothing to do with a physical order. This means
* that the first parameter in the list will correspond to <code>{0}</code>, second to <code>{1}</code> and so on.
* @return localized message merged with parameters (if provided), or key if message not found.
*/
public static String message(String key, Locale locale, Object... params) {
String pattern;
try {
pattern = ResourceBundle.getBundle(BUNDLE, locale == null ? Locale.getDefault() : locale).getString(key);
} catch (MissingResourceException e) {
pattern = key;
}
return empty(params) ? pattern : new MessageFormat(pattern).format(params);
}代码示例来源：origin: javalite/activejdbc
public static <T extends Model> LazyList<T> where(Class<T> clazz, String subquery, Object... params) {
if (subquery.trim().equals("*")) {
if (empty(params)) {
return findAll(clazz);
} else {
throw new IllegalArgumentException(
"cannot provide parameters with query: '*', use findAll() method instead");
}
}
return new LazyList<>(subquery, metaModelOf(clazz), params);
}代码示例来源：origin: javalite/activejdbc
if (pretty) { sb.append('\n'); }
String[] names = !empty(attributeNames) ? attributeNames : attributeNamesLowerCased();
for (String name : names) {
if (pretty) { sb.append(" ").append(indent); }代码示例来源：origin: javalite/activejdbc
/**
* Runs a count query, returns a number of matching records.
*
* @param table table in which to count rows.
* @param query this is a filtering query for the count. If '*' provided, all records will be counted. Example:
* <code>"age > 65 AND department = 'accounting'"</code>
* @param params parameters for placeholder substitution.
* @return count number of records found in a table.
*/
public Long count(String table, String query, Object... params) {
if (query.trim().equals("*")) {
if (empty(params)) {
return count(table);
} else {
throw new IllegalArgumentException("cannot use '*' and parameters");
}
}
String sql = "SELECT COUNT(*) FROM " + table + " WHERE " + query;
return Convert.toLong(firstCell(sql, params));
}代码示例来源：origin: javalite/activejdbc
sb.append('{');
String[] names = !empty(attributeNames) ? attributeNames : attributeNamesLowerCased();
for (int i = 0; i < names.length; i++) {
if (i > 0) { sb.append(','); }代码示例来源：origin: org.javalite/javalite-common
/**
* Joins the items in array with a delimiter, and appends the result to StringBuilder.
*
* @param sb StringBuilder to append result to
* @param array array of items to join.
* @param delimiter delimiter to insert between elements of array.
*/
public static void join(StringBuilder sb, Object[] array, String delimiter) {
if (empty(array)) { return; }
sb.append(array[0]);
for (int i = 1; i < array.length; i++) {
sb.append(delimiter);
sb.append(array[i]);
}
}代码示例来源：origin: com.github.tchoulihan/javalite-common
/**
* Joins the items in array with a delimiter, and appends the result to StringBuilder.
*
* @param sb StringBuilder to append result to
* @param array array of items to join.
* @param delimiter delimiter to insert between elements of array.
*/
public static void join(StringBuilder sb, Object[] array, String delimiter) {
if (empty(array)) { return; }
sb.append(array[0]);
for (int i = 1; i < array.length; i++) {
sb.append(delimiter);
sb.append(array[i]);
}
}代码示例来源：origin: org.javalite/activejdbc
/**
* Looks for a localized property/message in <code>activejdbc_messages</code> bundle.
*
* @param key key of the property.
* @param locale locale of a bundle, or null for default locale
* @param params list of parameters for a message. The order of parameters in this list will correspond to the
* numeric order in the parameters listed in the message and has nothing to do with a physical order. This means
* that the first parameter in the list will correspond to <code>{0}</code>, second to <code>{1}</code> and so on.
* @return localized message merged with parameters (if provided), or key if message not found.
*/
public static String message(String key, Locale locale, Object... params) {
String pattern;
try {
pattern = ResourceBundle.getBundle(BUNDLE, locale == null ? Locale.getDefault() : locale).getString(key);
} catch (MissingResourceException e) {
pattern = key;
}
return empty(params) ? pattern : new MessageFormat(pattern).format(params);
}代码示例来源：origin: com.github.tchoulihan/activejdbc
/**
* Looks for a localized property/message in <code>activejdbc_messages</code> bundle.
*
* @param key key of the property.
* @param locale locale of a bundle, or null for default locale
* @param params list of parameters for a message. The order of parameters in this list will correspond to the
* numeric order in the parameters listed in the message and has nothing to do with a physical order. This means
* that the first parameter in the list will correspond to <code>{0}</code>, second to <code>{1}</code> and so on.
* @return localized message merged with parameters (if provided), or key if message not found.
*/
public static String message(String key, Locale locale, Object... params) {
String pattern;
try {
pattern = ResourceBundle.getBundle(BUNDLE, locale == null ? Locale.getDefault() : locale).getString(key);
} catch (MissingResourceException e) {
pattern = key;
}
return empty(params) ? pattern : new MessageFormat(pattern).format(params);
}代码示例来源：origin: org.javalite/javalite-common
/**
* Joins the items in array with a delimiter.
*
* @param array array of items to join.
* @param delimiter delimiter to insert between elements of array.
* @return string with array elements separated by delimiter. There is no trailing delimiter in the string.
*/
public static String join(String[] array, String delimiter) {
if (empty(array)) { return ""; }
StringBuilder sb = new StringBuilder();
join(sb, array, delimiter);
return sb.toString();
}代码示例来源：origin: com.github.tchoulihan/activejdbc
static void logAccess(String query, Object[] params, String access) {
if (logger.isInfoEnabled()) {
StringBuilder log = new StringBuilder().append(access).append(", ").append('"').append(query).append('"');
if (!empty(params)) {
log.append(", with parameters: ").append('<');
join(log, params, ">, <");
log.append('>');
}
LogFilter.log(logger, log.toString());
}
}代码示例来源：origin: com.github.tchoulihan/javalite-common
/**
* Joins the items in array with a delimiter.
*
* @param array array of items to join.
* @param delimiter delimiter to insert between elements of array.
* @return string with array elements separated by delimiter. There is no trailing delimiter in the string.
*/
public static String join(String[] array, String delimiter) {
if (empty(array)) { return ""; }
StringBuilder sb = new StringBuilder();
join(sb, array, delimiter);
return sb.toString();
}代码示例来源：origin: org.javalite/activejdbc
public static <T extends Model> LazyList<T> where(Class<T> clazz, String subquery, Object... params) {
if (subquery.trim().equals("*")) {
if (empty(params)) {
return findAll(clazz);
} else {
throw new IllegalArgumentException(
"cannot provide parameters with query: '*', use findAll() method instead");
}
}
return new LazyList<>(subquery, metaModelOf(clazz), params);
}代码示例来源：origin: com.github.tchoulihan/activejdbc
public static <T extends Model> LazyList<T> where(Class<T> clazz, String subquery, Object... params) {
if (subquery.trim().equals("*")) {
if (empty(params)) {
return findAll(clazz);
} else {
throw new IllegalArgumentException(
"cannot provide parameters with query: '*', use findAll() method instead");
}
}
return new LazyList<T>(subquery, metaModelOf(clazz), params);
}代码示例来源：origin: com.github.tchoulihan/activejdbc
/**
* Runs a count query, returns a number of matching records.
*
* @param table table in which to count rows.
* @param query this is a filtering query for the count. If '*' provided, all records will be counted. Example:
* <code>"age > 65 AND department = 'accounting'"</code>
* @param params parameters for placeholder substitution.
* @return count number of records found in a table.
*/
public Long count(String table, String query, Object... params) {
if (query.trim().equals("*")) {
if (empty(params)) {
return count(table);
} else {
throw new IllegalArgumentException("cannot use '*' and parameters");
}
}
String sql = "SELECT COUNT(*) FROM " + table + " WHERE " + query;
return Convert.toLong(firstCell(sql, params));
}代码示例来源：origin: org.javalite/activejdbc
/**
* Runs a count query, returns a number of matching records.
*
* @param table table in which to count rows.
* @param query this is a filtering query for the count. If '*' provided, all records will be counted. Example:
* <code>"age > 65 AND department = 'accounting'"</code>
* @param params parameters for placeholder substitution.
* @return count number of records found in a table.
*/
public Long count(String table, String query, Object... params) {
if (query.trim().equals("*")) {
if (empty(params)) {
return count(table);
} else {
throw new IllegalArgumentException("cannot use '*' and parameters");
}
}
String sql = "SELECT COUNT(*) FROM " + table + " WHERE " + query;
return Convert.toLong(firstCell(sql, params));
}代码示例来源：origin: com.github.tchoulihan/activejdbc
if (pretty) { sb.append('\n'); }
String[] names = !empty(attributeNames) ? attributeNames : attributeNamesLowerCased();
for (String name : names) {
if (pretty) { sb.append(" ").append(indent); }代码示例来源：origin: com.github.tchoulihan/activejdbc
static void logQuery(Logger logger, String query, Object[] params, long queryStartTime){
long time = System.currentTimeMillis() - queryStartTime;
if (Registry.instance().getConfiguration().collectStatistics()) {
Registry.instance().getStatisticsQueue().enqueue(new QueryExecutionEvent(query, time));
}
if (logger.isInfoEnabled()) {
StringBuilder log = new StringBuilder().append("Query: \"").append(query).append('"');
if (!empty(params)) {
log.append(", with parameters: ").append('<');
join(log, params, ">, <");
log.append('>');
}
log(logger, log.append(", took: ").append(time).append(" milliseconds").toString());
}
}内容来源于网络，如有侵权，请联系作者删除！