api/src/main/java/javax/faces/component/_UISelectItems.java

/*
 * 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 javax.faces.component;

import javax.faces.context.FacesContext;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFComponent;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFExclude;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFProperty;

/**
 * This tag associates a set of selection list items with the nearest
 * parent UIComponent. The set of SelectItem objects is retrieved via
 * a value-binding.
 * <p>
 * Unless otherwise specified, all attributes accept static values
 * or EL expressions.
 * </p>
 * <p>
 * UISelectItems should be nested inside a UISelectMany or UISelectOne component,
 * and results in  the addition of one ore more SelectItem instance to the list of available options
 * for the parent component
 * </p>
 */
@JSFComponent(clazz = "javax.faces.component.UISelectItems",
              template=true,
              name = "f:selectItems",
              tagClass = "org.apache.myfaces.taglib.core.SelectItemsTag",
              bodyContent = "empty")
abstract class _UISelectItems extends UIComponentBase
{

    static public final String COMPONENT_FAMILY =
        "javax.faces.SelectItems";
    static public final String COMPONENT_TYPE =
        "javax.faces.SelectItems";

    /**
     * Disable this property; although this class extends a base-class that
     * defines a read/write rendered property, this particular subclass
     * does not support setting it. Yes, this is broken OO design: direct
     * all complaints to the JSF spec group.
     */
    @JSFExclude
    @JSFProperty(tagExcluded=true)
    @Override
    public void setRendered(boolean state)
    {
        super.setRendered(state);
        //call parent method due TCK problems
        //throw new UnsupportedOperationException();
    }
    
    @Override
    protected FacesContext getFacesContext()
    {
        //In theory the parent most of the times has 
        //the cached FacesContext instance, because this
        //element is purely logical, and the parent is the one
        //where encodeXXX was invoked. But only limit the
        //search to the closest parent.
        UIComponent parent = getParent();
        if (parent != null && parent.isCachedFacesContext())
        {
            return parent.getFacesContext();
        }
        else
        {
            return super.getFacesContext();
        }
    }

    /**
     * The initial value of this component.
     *
     * @return  the new value value
     */
    @JSFProperty
    public abstract Object getValue();
    
    /**
     * Name of a request-scope attribute under which the current item
     * of the collection, array, etc. of the value attribute will be 
     * exposed so that it can be referred to in EL for other attributes 
     * of this component.
     * 
     * @since 2.0
     * @return
     */
    @JSFExclude
    @JSFProperty(literalOnly = true)
    public String getVar()
    {
        return null;
    }
    
    /**
     * The value for the current item.
     * 
     * @since 2.0
     * @return
     */
    @JSFExclude
    @JSFProperty
    public Object getItemValue()
    {
        return null;
    }
    
    /**
     * The label of the current item.
     * 
     * @since 2.0
     * @return
     */
    @JSFExclude
    @JSFProperty
    public String getItemLabel()
    {
        return null;
    }
    
    /**
     * The description of the current item.
     * 
     * @since 2.0
     * @return
     */
    @JSFExclude
    @JSFProperty
    public String getItemDescription()
    {
        return null;
    }
    
    /**
     * Determines if the current item is selectable or not.
     * 
     * @since 2.0
     * @return
     */
    @JSFExclude
    @JSFProperty(defaultValue = "false", deferredValueType="java.lang.Boolean")
    public boolean isItemDisabled()
    {
        return false;
    }
    
    /**
     * Determines if the rendered markup for the current item receives
     * normal JSF HTML escaping or not.
     * 
     * @since 2.0
     * @return
     */
    @JSFExclude
    @JSFProperty(defaultValue = "true", deferredValueType="java.lang.Boolean")
    public boolean isItemLabelEscaped()
    {
        return true;
    }

}