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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.component.search;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.faces.FacesException;
import javax.faces.component.ContextCallback;
import javax.faces.component.UIComponent;
import javax.faces.component.search.SearchExpressionContext;
import javax.faces.component.search.SearchExpressionHint;
import javax.faces.component.search.SearchKeywordContext;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.FacesContext;
public class SearchKeywordResolverImplId extends AbstractSearchKeywordResolverImpl {
private static final Pattern PATTERN = Pattern.compile("id\\(([\\w-]+)\\)");
@Override
public void resolve(SearchKeywordContext searchKeywordContext, UIComponent current, String keyword) {
FacesContext facesContext = searchKeywordContext.getSearchExpressionContext().getFacesContext();
String id = extractId(keyword);
if (isHintSet(searchKeywordContext.getSearchExpressionContext(), SearchExpressionHint.SKIP_VIRTUAL_COMPONENTS)) {
// Avoid visit tree because in this case we need real component instances.
// This means components inside UIData will not be scanned.
findWithId(facesContext, id, current, searchKeywordContext.getCallback());
} else {
current.visitTree(
VisitContext.createVisitContext(facesContext, null, searchKeywordContext.getSearchExpressionContext().getVisitHints()),
new VisitCallback() {
@Override
public VisitResult visit(VisitContext context, UIComponent target) {
if (id.equals(target.getId())) {
searchKeywordContext.invokeContextCallback(target);
if (isHintSet(searchKeywordContext.getSearchExpressionContext(), SearchExpressionHint.RESOLVE_SINGLE_COMPONENT)) {
return VisitResult.COMPLETE;
}
return VisitResult.ACCEPT;
} else {
return VisitResult.ACCEPT;
}
}
});
}
searchKeywordContext.setKeywordResolved(true);
}
@Override
public boolean isResolverForKeyword(SearchExpressionContext searchExpressionContext, String keyword) {
if (keyword.startsWith("id")) {
try {
Matcher matcher = PATTERN.matcher(keyword);
return matcher.matches();
} catch (Exception e) {
return false;
}
}
return false;
}
protected String extractId(String expression) {
Matcher matcher = PATTERN.matcher(expression);
if (matcher.matches()) {
return matcher.group(1);
} else {
throw new FacesException("Expression does not match following pattern @id(id). Expression: \""
+ expression + "\"");
}
}
private void findWithId(FacesContext context, String id, UIComponent base, ContextCallback callback) {
if (id.equals(base.getId())) {
callback.invokeContextCallback(context, base);
}
if (base.getFacetCount() > 0) {
for (UIComponent facet : base.getFacets().values()) {
findWithId(context, id, facet, callback);
}
}
if (base.getChildCount() > 0) {
for (int i = 0, childCount = base.getChildCount(); i < childCount; i++) {
UIComponent child = base.getChildren().get(i);
findWithId(context, id, child, callback);
}
}
}
}