package org.apache.myfaces.tobago.taglib.component;
/*
* 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.
*/
import org.apache.myfaces.tobago.apt.annotation.Tag;
import org.apache.myfaces.tobago.apt.annotation.BodyContent;
import org.apache.myfaces.tobago.apt.annotation.TagAttribute;
import org.apache.myfaces.tobago.component.ComponentUtil;
import org.apache.myfaces.tobago.component.UICommand;
import org.apache.myfaces.tobago.TobagoConstants;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.JspException;
import javax.faces.webapp.UIComponentTag;
import javax.faces.component.UIComponent;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.ValueHolder;
import javax.faces.el.ValueBinding;
import javax.faces.context.FacesContext;
/*
* Date: Oct 14, 2006
* Time: 1:47:13 PM
*/
/**
* Add an attribute on the UIComponent
* associated with the closest parent UIComponent custom action.
*/
@Tag(name = "attribute", bodyContent = BodyContent.EMPTY)
public class AttributeTag extends TagSupport {
/**
* <p>The name of the attribute</p>
*/
private String name;
/**
* <p>The value of the attribute</p>
*/
private String value;
/**
* The name of a attribute.
* @param name A attribute name
*/
@TagAttribute(required = true)
public void setName(String name) {
this.name = name;
}
/**
* The value of a attribute
* @param value A attribute value
*/
@TagAttribute(required = true)
public void setValue(String value) {
this.value = value;
}
/**
* @throws javax.servlet.jsp.JspException if a JSP error occurs
*/
public int doStartTag() throws JspException {
// Locate our parent UIComponentTag
UIComponentTag tag =
UIComponentTag.getParentUIComponentTag(pageContext);
if (tag == null) {
// TODO Message resource i18n
throw new JspException("Not nested in faces tag");
}
if (!tag.getCreated()) {
return (SKIP_BODY);
}
UIComponent component = tag.getComponentInstance();
if (component == null) {
// TODO Message resource i18n
throw new JspException("Component Instance is null");
}
String attributeName = name;
if (UIComponentTag.isValueReference(name)) {
ValueBinding valueBinding = ComponentUtil.createValueBinding(name);
if (valueBinding != null) {
attributeName = (String) valueBinding.getValue(FacesContext.getCurrentInstance());
} else {
// TODO Message resource i18n
throw new JspException("Can not get ValueBinding for attribute name " + name);
}
}
if (component instanceof EditableValueHolder
&& TobagoConstants.ATTR_VALIDATOR.equals(attributeName)) {
ComponentUtil.setValidator((EditableValueHolder) component, value);
} else if (component instanceof ValueHolder
&& TobagoConstants.ATTR_CONVERTER.equals(attributeName)) {
ComponentUtil.setConverter((ValueHolder) component, value);
} else if (TobagoConstants.ATTR_STYLE_CLASS.equals(attributeName)) {
ComponentUtil.setStyleClasses(component, value);
} else if (TobagoConstants.ATTR_RENDERED_PARTIALLY.equals(attributeName)
&& component instanceof UICommand) {
ComponentUtil.setRenderedPartially((UICommand) component, value);
} else if (UIComponentTag.isValueReference(value)) {
ValueBinding valueBinding = ComponentUtil.createValueBinding(value);
if (valueBinding != null) {
component.setValueBinding(name, valueBinding);
} else {
// TODO Message resource i18n
throw new JspException("Can not get ValueBinding for attribute value " + value);
}
} else {
component.getAttributes().put(attributeName, value);
}
return (SKIP_BODY);
}
/**
* <p>Release references to any acquired resources.
*/
public void release() {
super.release();
this.name = null;
this.value = null;
}
}