jakarta.faces.view.facelets.ValidatorHandler Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
* Copyright 2005-2007 The Apache Software Foundation
*
* Licensed 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 jakarta.faces.view.facelets;
import jakarta.faces.view.EditableValueHolderAttachedObjectHandler;
/**
*
* Handles setting a {@link jakarta.faces.validator.Validator} instance on an
* {@link jakarta.faces.component.EditableValueHolder} parent. Will wire all attributes set to the
* Validator instance created/fetched. Uses the "binding" attribute for grabbing instances to apply
* attributes to.
*
*
*
* Will only set/create Validator is the passed UIComponent's parent is null, signifying that it wasn't restored from an
* existing tree.
*
*
*/
public class ValidatorHandler extends FaceletsAttachedObjectHandler implements EditableValueHolderAttachedObjectHandler {
private String validatorId;
private TagHandlerDelegate helper;
private ValidatorConfig config;
/**
*
* Construct this instance around the configuration information in argument config
*
*
* @param config the TagConfig subclass for this kind of attached object.
*/
public ValidatorHandler(ValidatorConfig config) {
super(config);
this.config = config;
validatorId = config.getValidatorId();
}
/**
*
* Return the implementation specific delegate instance that provides the bulk of the work for this handler instance.
*
*
* @return the implementation specific delegate instance
*/
@Override
protected TagHandlerDelegate getTagHandlerDelegate() {
if (null == helper) {
helper = delegateFactory.createValidatorHandlerDelegate(this);
}
return helper;
}
/**
*
* Retrieve the id of the validator that is to be created and added to the parent EditableValueHolder. All
* subclasses should override this method because it is important for Facelets to have a unique way of identifying the
* validators that are added to this EditableValueHolder and allows exclusions to work properly. An
* exclusion is a validator declaration that has the attribute "disabled" which resolves to false, instructing Facelets
* not to register a default validator with the same id.
*
*
* @param ctx the FaceletContext for this {@code Facelet}
*
* @return the validator-id
*/
public String getValidatorId(FaceletContext ctx) {
if (validatorId == null) {
TagAttribute idAttr = getAttribute("validatorId");
if (idAttr == null) {
return null;
} else {
return idAttr.getValue(ctx);
}
}
return validatorId;
}
/**
*
* Return the TagConfig subclass used to configure this handler instance.
*
*
* @return the TagConfig subclass used to configure this handler instance.
*/
public ValidatorConfig getValidatorConfig() {
return config;
}
}