PropertiesHelper.resolvePlaceHolders( copy );
public static String resolvePlaceHolder(String property) {
if ( property.indexOf( PLACEHOLDER_START ) < 0 ) {
return property;
}
StringBuffer buff = new StringBuffer();
char[] chars = property.toCharArray();
for ( int pos = 0; pos < chars.length; pos++ ) {
if ( chars[pos] == '$' ) {
// peek ahead
if ( chars[pos+1] == '{' ) {
// we have a placeholder, spin forward till we find the end
String systemPropertyName = "";
int x = pos + 2;
for ( ; x < chars.length && chars[x] != '}'; x++ ) {
systemPropertyName += chars[x];
// if we reach the end of the string w/o finding the
// matching end, that is an exception
if ( x == chars.length - 1 ) {
throw new IllegalArgumentException( "unmatched placeholder start [" + property + "]" );
}
}
String systemProperty = extractFromSystem( systemPropertyName );
buff.append( systemProperty == null ? "" : systemProperty );
pos = x + 1;
// make sure spinning forward did not put us past the end of the buffer...
if ( pos >= chars.length ) {
break;
}
}
}
buff.append( chars[pos] );
}
String rtn = buff.toString();
return StringHelper.isEmpty( rtn ) ? null : rtn; |
extractFromSystem( systemPropertyName )
private static String extractFromSystem(String systemPropertyName) {
try {
return System.getProperty( systemPropertyName );
}
catch( Throwable t ) {
return null;
}
}
|
this properties can use in
hibernate.cfg.xml
posted on 2006-11-07 17:25
R.Zeus 阅读(486)
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Hibernate