Just because I'm probably going to use one at some point...
| import java.io.Serializable;
|
| import javax.faces.component.UIComponent;
| import javax.faces.context.FacesContext;
| import javax.faces.convert.Converter;
|
| import org.jboss.seam.annotations.Logger;
| import org.jboss.seam.annotations.Name;
| import org.jboss.seam.log.Log;
|
| /**
| * Just for h:outputText components
| * @author Matthew.Drees
| *
| */
| @Name("creditCardMaskingConverter")
| @org.jboss.seam.annotations.faces.Converter
| public class CreditCardMaskingConverter implements Converter, Serializable {
|
| private static final long serialVersionUID = 1L;
|
| @Logger Log log;
|
| String pattern = "1111********1111";
|
| public Object getAsObject(FacesContext context, UIComponent component,
String value) {
| throw new UnsupportedOperationException();
| }
|
| public String getAsString(FacesContext context, UIComponent component,
Object value) {
| log.trace("getting #0 as String", value);
| if (value == null) {
| throw new IllegalArgumentException("value to convert is
null");
| }
| String toString = value.toString();
| assertValidity(toString);
| StringBuilder sb = new StringBuilder();
| for(int i = 0; i < 16; i++) {
| if (pattern.charAt(i) == '*') {
| sb.append('*');
| } else {
| sb.append(toString.charAt(i));
| }
| }
| return sb.toString();
| }
|
| private void assertValidity(String string) {
| if (string.length() != 16) {
| throw new IllegalArgumentException("not a 16-digit
string: " + string);
| }
| }
|
| /**
| * A 16-character string indicating the masking pattern. A '*' at index
i means
| * the converted output will have a '*' at index i.
| * @param pattern
| */
| public void setPattern(String pattern) {
| assertValidity(pattern);
| this.pattern = pattern;
| }
|
| public String getPattern() {
| return pattern;
| }
|
| public Log getLog() {
| return log;
| }
|
| public void setLog(Log log) {
| this.log = log;
| }
| }
|
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