/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (the | |
* "License"); you may not use this file except in compliance | |
* with the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
package org.apache.myfaces.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.search.SearchKeywordResolver; | |
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 IdSearchKeywordResolver extends SearchKeywordResolver | |
{ | |
public static final String ID_KEYWORD = "id"; | |
private static final Pattern PATTERN = Pattern.compile("id\\((\\w+)\\)"); | |
@Override | |
public void resolve(SearchKeywordContext expressionContext, UIComponent current, String keyword) | |
{ | |
FacesContext facesContext = expressionContext.getSearchExpressionContext().getFacesContext(); | |
final String targetId = extractId(keyword); | |
if (expressionContext.getSearchExpressionContext().getExpressionHints() != null | |
&& expressionContext.getSearchExpressionContext().getExpressionHints().contains( | |
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. | |
withId(facesContext, targetId, current, expressionContext.getCallback()); | |
expressionContext.setKeywordResolved(true); | |
} | |
else | |
{ | |
current.visitTree( | |
VisitContext.createVisitContext(facesContext, null, | |
expressionContext.getSearchExpressionContext().getVisitHints()), | |
new VisitCallback() | |
{ | |
@Override | |
public VisitResult visit(VisitContext context, UIComponent target) | |
{ | |
if (targetId.equals(target.getId())) | |
{ | |
expressionContext.invokeContextCallback(target); | |
if (expressionContext.getSearchExpressionContext().getExpressionHints() != null | |
&& expressionContext.getSearchExpressionContext().getExpressionHints().contains( | |
SearchExpressionHint.RESOLVE_SINGLE_COMPONENT)) | |
{ | |
return VisitResult.COMPLETE; | |
} | |
return VisitResult.ACCEPT; | |
} | |
else | |
{ | |
return VisitResult.ACCEPT; | |
} | |
} | |
}); | |
} | |
} | |
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 static void withId(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()) | |
{ | |
withId(context, id, facet, callback); | |
} | |
} | |
int childCount = base.getChildCount(); | |
if (childCount > 0) | |
{ | |
for (int i = 0; i < childCount; i++) | |
{ | |
UIComponent child = base.getChildren().get(i); | |
withId(context, id, child, callback); | |
} | |
} | |
} | |
@Override | |
public boolean isResolverForKeyword(SearchExpressionContext searchExpressionContext, String command) | |
{ | |
if (command.length() > 6 && command.substring(0, ID_KEYWORD.length()).equalsIgnoreCase(ID_KEYWORD)) | |
{ | |
Matcher matcher = PATTERN.matcher(command); | |
if (matcher.matches()) | |
{ | |
return true; | |
} | |
else | |
{ | |
return false; | |
} | |
} | |
return false; | |
} | |
@Override | |
public boolean isPassthrough(SearchExpressionContext searchExpressionContext, String keyword) | |
{ | |
return false; | |
} | |
@Override | |
public boolean isLeaf(SearchExpressionContext searchExpressionContext, String keyword) | |
{ | |
return false; | |
} | |
} |