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 閱讀(494)
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