JDK15Platformpublic class JDK15Platform extends Object implements JDKPlatform| INTERNAL:
Implements operations specific to JDK 1.5 |
| Fields Summary |
|---|
| protected static Hashtable | patternCachePERF: The regular expression compiled Pattern objects are cached
to avoid recompilation on every usage. |
| Methods Summary |
|---|
| public int | conformLike(java.lang.Object left, java.lang.Object right)INTERNAL:
An implementation of in memory queries with Like which uses the JDK 1.4
regular expression framework.
if ((left == null) && (right == null)) {
return JavaPlatform.TRUE;
} else if ((left == null) || (right == null)) {
return JavaPlatform.FALSE;
}
if (left instanceof String && right instanceof String) {
// PERF: First check the pattern cache for the pattern.
// Note that the original string is the key, to avoid having to translate it first.
Pattern pattern = (Pattern)patternCache.get(right);
if (pattern == null) {
// Bug 3936427 - Replace regular expression reserved characters with escaped version of those characters
// For instance replace ? with \?
String convertedRight = ((String)right).replaceAll("\\?", "\\\\?");
convertedRight = convertedRight.replaceAll("\\*", "\\\\*");
convertedRight = convertedRight.replaceAll("\\.", "\\\\.");
convertedRight = convertedRight.replaceAll("\\[", "\\\\[");
convertedRight = convertedRight.replaceAll("\\)", "\\\\)");
convertedRight = convertedRight.replaceAll("\\(", "\\\\(");
convertedRight = convertedRight.replaceAll("\\{", "\\\\{");
convertedRight = convertedRight.replaceAll("\\+", "\\\\+");
convertedRight = convertedRight.replaceAll("\\^", "\\\\^");
convertedRight = convertedRight.replaceAll("\\|", "\\\\|");
// regular expressions to substitute SQL wildcards with regex wildcards
// replace "%" which is not preceded by "\" with ".*"
convertedRight = convertedRight.replaceAll("([^\\\\])%", "$1.*");
// replace "_" which is not preceded by "\" with ".
convertedRight = convertedRight.replaceAll("([^\\\\])_", "$1.");
// deal with wildcards at the beginning of a line.
convertedRight = convertedRight.replaceAll("^%", ".*");
convertedRight = convertedRight.replaceAll("^_", ".");
// replace "\%" with "%"
convertedRight = convertedRight.replaceAll("\\\\%", "%");
// replace "\_" with "_"
convertedRight = convertedRight.replaceAll("\\\\_", "_");
pattern = Pattern.compile(convertedRight);
// Ensure cache does not grow beyond 100.
if (patternCache.size() > 100) {
patternCache.remove(patternCache.keySet().iterator().next());
}
patternCache.put(right, pattern);
}
boolean match = pattern.matcher((String)left).matches();
if (match) {
return JavaPlatform.TRUE;
} else {
return JavaPlatform.FALSE;
}
}
return JavaPlatform.UNDEFINED;
| | public java.util.Map | getQueryCacheMap()INTERNAL
Get the Map to store the query cache in
return new java.util.concurrent.ConcurrentHashMap();
| | public long | getTimeInMillis(java.util.Calendar calendar)INTERNAL:
Get the milliseconds from a Calendar. In JDK 1.4, this can be accessed directly from the calendar.
return calendar.getTimeInMillis();
| | public void | setExceptionCause(java.lang.Throwable exception, java.lang.Throwable cause)INTERNAL:
Use API first available in JDK 1.4 to set the cause of an exception.
if (exception.getCause() == null) {
exception.initCause(cause);
}
| | public void | setTimeInMillis(java.util.Calendar calendar, long millis)INTERNAL:
Set the milliseconds for a Calendar. In JDK 1.4, this can be set directly in the calendar.
calendar.setTimeInMillis(millis);
| | public boolean | shouldPrintInternalException()INTERNAL
return a boolean which determines where TopLink should include the TopLink-stored
Internal exception in it's stack trace. For JDK 1.4 VMs with exception chaining
the Internal exception can be redundant and confusing.
return false;
|
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