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package javax.faces.component;
import javax.faces.context.FacesContext;
import javax.faces.application.Application;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.HashMap;
class SharedUtils {
/*
* Determine whether String is a mixed value binding expression or not.
*/
static boolean isMixedExpression(String expression) {
if (null == expression) {
return false;
}
// if it doesn't start and end with delimiters
return (!(expression.startsWith("#{") && expression.endsWith("}")))
&& isExpression(expression);
}
/*
* Determine whether String is a value binding expression or not.
*/
static boolean isExpression(String expression) {
if (null == expression) {
return false;
}
//check to see if attribute has an expression
int start = expression.indexOf("#{");
return start != -1 && expression.indexOf('}', start+2) != -1;
}
static Map<String, List<String>> evaluateExpressions(FacesContext context, Map<String, List<String>> map) {
if (map != null && !map.isEmpty()) {
Map<String, List<String>> ret = new HashMap<String, List<String>>(map.size());
for (Map.Entry<String, List<String>> entry : map.entrySet()) {
ret.put(entry.getKey(), evaluateExpressions(context, entry.getValue()));
}
return ret;
}
return map;
}
static List<String> evaluateExpressions(FacesContext context, List<String> values) {
if (!values.isEmpty()) {
List<String> ret = new ArrayList<String>(values.size());
Application app = context.getApplication();
for (String val : values) {
if (val != null) {
String value = val.trim();
if (isExpression(value)) {
value = app.evaluateExpressionGet(context,
value,
String.class);
}
ret.add(value);
}
}
return ret;
}
return values;
}
}