4.6.2.4. Parameterized Bridge
A
ParameterizedBridge interface passes parameters to the bridge implementation, making it more flexible. The ParameterizedBridge interface can be implemented by StringBridge, TwoWayStringBridge, FieldBridge implementations. All implementations must be thread-safe.
The following example implements a
ParameterizedBridge interface, with parameters passed through the @FieldBridge annotation.
Example 4.16. Configure the ParameterizedBridge Interface
public class PaddedIntegerBridge implements StringBridge, ParameterizedBridge { public static String PADDING_PROPERTY = "padding"; private int padding = 5; //default public void setParameterValues(Map<String,String> parameters) { String padding = parameters.get( PADDING_PROPERTY ); if (padding != null) this.padding = Integer.parseInt( padding ); } public String objectToString(Object object) { String rawInteger = ( (Integer) object ).toString(); if (rawInteger.length() > padding) throw new IllegalArgumentException( "Try to pad on a number too big" ); StringBuilder paddedInteger = new StringBuilder( ); for ( int padIndex = rawInteger.length() ; padIndex < padding ; padIndex++ ) { paddedInteger.append('0'); } return paddedInteger.append( rawInteger ).toString(); } } //property @FieldBridge(impl = PaddedIntegerBridge.class, params = @Parameter(name="padding", value="10") ) private Integer length;
