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Java(TM) EE 7 Specification APIs

There is a newer version: 8.0.1





Package Description for "javax.faces.component.search"


APIs for searching for components in the
component tree by using expressions.



This feature has two entry points: for the page author and for the
  Java programmer.  Following is a brief overview of each.

For the Page Author

  The following tags support the use of search
  expressions: <h:message />, <h:messages
  />, <h:outputLabel />,
  and <f:ajax />.  Each of those tags have one or
  more attributes whose value must be a client identifier.  This feature
  expands the capability of those attributes to be search expressions.
  A search expression is space separated list of tokens, where a token
  can either be a client identifier, a search keyword, or a combination
  of both.  See the specification
  for SearchKeywordResolver
  for the list of keywords that must be supported.  See the
  specification
  for SearchExpressionHandler
  to learn how the search is performed.

  Here is a brief example of the page author use case:

<h:body>
  <h:outputLabel id="label" for="@next" value="Test" />
  <h:inputText id="input">
    <f:ajax render="@this @next" />
  </h:inputText>
  <h:inputText id="input2" />
</h:body> 

For the Java Programmer

  Using search expressions from Java code offers more flexibility.
  One must obtain a handle to
  the SearchExpressionHandler
  and invoke methods on it as desired.

The following example resolves to a clientId:

    
        
            
                SearchExpressionHandler handler = facesContext.getApplication().getSearchExpressionHandler();
                SearchExpressionContext context = SearchExpressionContext.createSearchExpressionContext(facesContext, facesContext.getViewRoot());
                String clientId = handler.resolveClientId(context, ":form:container:@next");
            
        
    

    The following example resolves to a component:

    
        
            
                SearchExpressionHandler handler = facesContext.getApplication().getSearchExpressionHandler();
                SearchExpressionContext context = SearchExpressionContext.createSearchExpressionContext(facesContext, facesContext.getViewRoot());
                handler.resolveComponent(context, ":form:container:@next",
                               new ContextCallback() {
                                   public void invokeContextCallback(FacesContext context, 
                                                            UIComponent target) {
                                       // target == the resolved component
                                   }
                               }); 
            
        

    The following example uses multiple expressions and therefor resolves to multiple components:

    
        
            
                SearchExpressionHandler handler = facesContext.getApplication().getSearchExpressionHandler();
                SearchExpressionContext context = SearchExpressionContext.createSearchExpressionContext(facesContext, facesContext.getViewRoot());
                handler.resolveComponents(context, ":form:container:@next :input1 input2:@parent",
                               new ContextCallback() {
                                   public void invokeContextCallback(FacesContext context, 
                                                            UIComponent target) {
                                       // target == the resolved component
                                   }
                               });

javax.faces.component.search.package.html Maven / Gradle / Ivy

For the Page Author

For the Java Programmer

Extending the Capabilities of the Component Search Facility