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package com.sun.faces.component.search;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.search.UntargetableComponent;
import javax.faces.component.search.SearchExpressionContext;
import javax.faces.component.search.SearchKeywordContext;
import javax.faces.component.search.SearchKeywordResolver;
public class SearchKeywordResolverImplChild extends SearchKeywordResolver {
private static final Pattern PATTERN = Pattern.compile("child\\((\\d+)\\)");
@Override
public void resolve(SearchKeywordContext searchKeywordContext, UIComponent current, String keyword) {
Matcher matcher = PATTERN.matcher(keyword);
if (matcher.matches()) {
int childNumber = Integer.parseInt(matcher.group(1));
if (childNumber + 1 > current.getChildCount()) {
throw new FacesException("Component with clientId \""
+ current.getClientId(searchKeywordContext.getSearchExpressionContext().getFacesContext())
+ "\" has fewer children as \"" +
childNumber + "\". Expression: \"" + keyword + "\"");
}
List<UIComponent> list = current.getChildren();
int count = 0;
for (int i = 0; i < current.getChildCount(); i++) {
if (!(list.get(i) instanceof UntargetableComponent)) {
count++;
}
if (count == childNumber + 1) {
searchKeywordContext.invokeContextCallback(current.getChildren().get(childNumber));
break;
}
}
if (count < childNumber) {
throw new FacesException("Component with clientId \""
+ current.getClientId(searchKeywordContext.getSearchExpressionContext().getFacesContext())
+ "\" has fewer children as \"" +
childNumber + "\". Expression: \"" + keyword + "\"");
}
} else {
throw new FacesException(
"Expression does not match following pattern @child(n). Expression: \"" + keyword + "\"");
}
}
@Override
public boolean isResolverForKeyword(SearchExpressionContext searchExpressionContext, String keyword) {
if (keyword.startsWith("child")) {
try {
Matcher matcher = PATTERN.matcher(keyword);
return matcher.matches();
} catch (Exception e) {
return false;
}
}
return false;
}
}