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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;
}
}