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/*
* The MIT License
*
* Copyright (c) 2009-2023 PrimeTek Informatics
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.primefaces.expression.impl;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import org.primefaces.expression.ClientIdSearchExpressionResolver;
import org.primefaces.expression.SearchExpressionHint;
import org.primefaces.expression.SearchExpressionResolver;
import org.primefaces.expression.SearchExpressionUtils;
/**
* {@link SearchExpressionResolver} for the "@widgetVar" keyword.
*/
public class WidgetVarExpressionResolver implements SearchExpressionResolver, ClientIdSearchExpressionResolver {
private static final Pattern PATTERN = Pattern.compile("@widgetVar\\((\\w+)\\)");
@Override
public UIComponent resolveComponent(FacesContext context, UIComponent source, UIComponent last, String expression,
Set hints) {
try {
Matcher matcher = PATTERN.matcher(expression);
if (matcher.matches()) {
WidgetVarVisitCallback visitCallback = new WidgetVarVisitCallback(matcher.group(1));
context.getViewRoot().visitTree(
SearchExpressionUtils.createVisitContext(context, hints),
visitCallback);
return visitCallback.getComponent();
}
else {
throw new FacesException("Expression does not match following pattern @widgetVar(var). Expression: \"" + expression + "\"");
}
}
catch (Exception e) {
throw new FacesException("Expression does not match following pattern @widgetVar(var). Expression: \"" + expression + "\"", e);
}
}
@Override
public String resolveClientIds(FacesContext context, UIComponent source, UIComponent last, String expression,
Set hints) {
// just return the complete expression, the client side will take care of it
// e.g. @widgetVar(myWidget)
return expression;
}
}
