/* * Copyright 2004 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 javax.faces.webapp; import javax.faces.application.Application; import javax.faces.component.EditableValueHolder; import javax.faces.component.UIComponent; import javax.faces.context.FacesContext; import javax.faces.el.ValueBinding; import javax.faces.validator.Validator; import javax.servlet.jsp.JspException; import javax.servlet.jsp.tagext.Tag; import javax.servlet.jsp.tagext.TagSupport; /** * see Javadoc of <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a> * * @author Manfred Geiler (latest modification by $Author$) * @version $Revision$ $Date$ */ public class ValidatorTag extends TagSupport { private static final long serialVersionUID = 8794036166323016663L; private String _validatorId; public void setValidatorId(String validatorId) { _validatorId = validatorId; } public int doStartTag() throws javax.servlet.jsp.JspException { UIComponentTag componentTag = UIComponentTag.getParentUIComponentTag(pageContext); if (componentTag == null) { throw new JspException("no parent UIComponentTag found"); } if (!componentTag.getCreated()) { return Tag.SKIP_BODY; } Validator validator = createValidator(); UIComponent component = componentTag.getComponentInstance(); if (component == null) { throw new JspException("parent UIComponentTag has no UIComponent"); } if (!(component instanceof EditableValueHolder)) { throw new JspException("UIComponent is no ValueHolder"); } ((EditableValueHolder)component).addValidator(validator); return Tag.SKIP_BODY; } public void release() { super.release(); _validatorId = null; } protected Validator createValidator() throws JspException { FacesContext facesContext = FacesContext.getCurrentInstance(); Application application = facesContext.getApplication(); if (UIComponentTag.isValueReference(_validatorId)) { ValueBinding vb = facesContext.getApplication().createValueBinding(_validatorId); return application.createValidator((String)vb.getValue(facesContext)); } else { return application.createValidator(_validatorId); } } }