org.apache.myfaces.custom.selectOneRow.SelectOneRowRenderer Maven / Gradle / Ivy

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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF1.2 features. A JSF1.2 implementation is required to use this version of the Tomahawk library.
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/*
 * 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 org.apache.myfaces.custom.selectOneRow;

import java.io.IOException;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.component.UIData;
import javax.faces.component.UIInput;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.el.ValueBinding;

import org.apache.myfaces.shared_tomahawk.config.MyfacesConfig;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;

/**
 * 
 * @JSFRenderer
 *   renderKitId = "HTML_BASIC" 
 *   family = "org.apache.myfaces.SelectOneRow"
 *   type = "org.apache.myfaces.SelectOneRow"
 * @since 1.1.7
 */
public class SelectOneRowRenderer extends HtmlRenderer
{

    public void encodeBegin(FacesContext facesContext, UIComponent component) throws IOException
    {
        if ((component instanceof SelectOneRow) && component.isRendered())
        {
            SelectOneRow row = (SelectOneRow) component;
            String clientId = row.getClientId(facesContext);

            ResponseWriter writer = facesContext.getResponseWriter();

            writer.startElement(HTML.INPUT_ELEM, row);
            writer.writeAttribute(HTML.TYPE_ATTR, HTML.INPUT_TYPE_RADIO, null);
            writer.writeAttribute(HTML.NAME_ATTR, row.getGroupName(), null);

            if (isDisabled(facesContext, row))
            {
                writer.writeAttribute(HTML.DISABLED_ATTR, HTML.DISABLED_ATTR, null);
            }
            
            writer.writeAttribute(HTML.ID_ATTR, clientId, null);

            if (isRowSelected(row))
            {
                writer.writeAttribute(HTML.CHECKED_ATTR, HTML.CHECKED_ATTR, null);
            }

            writer.writeAttribute(HTML.VALUE_ATTR, clientId, null);

            HtmlRendererUtils.renderHTMLAttributes(writer, row, HTML.INPUT_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED);

            writer.endElement(HTML.INPUT_ELEM);
        }
    }
    
    /**
     * Check if the component is disabled or not, taking into account
     * the config init param org.apache.myfaces.READONLY_AS_DISABLED_FOR_SELECTS 
     */
    protected boolean isDisabled(FacesContext facesContext, SelectOneRow row)
    {
        boolean disabled = row.isDisabled();
        boolean readonly = row.isReadonly();
        if (!disabled && readonly)
        {
            disabled = MyfacesConfig.getCurrentInstance(facesContext
                            .getExternalContext()).isReadonlyAsDisabledForSelect();
        }
        return disabled;        
    }

    private boolean isRowSelected(UIComponent component)
    {
        UIInput input = (UIInput) component;
        Object value = input.getValue();

        int currentRowIndex = getCurrentRowIndex(component);

        return (value != null)
                && (currentRowIndex == ((Number) value).intValue());

    }

    private int getCurrentRowIndex(UIComponent component)
    {
        UIData uidata = findUIData(component);
        if (uidata == null)
            return -1;
        else
            return uidata.getRowIndex();
    }

    protected UIData findUIData(UIComponent uicomponent)
    {
        if (uicomponent == null)
            return null;
        if (uicomponent instanceof UIData)
            return (UIData) uicomponent;
        else
            return findUIData(uicomponent.getParent());
    }

    public void decode(FacesContext context, UIComponent uiComponent)
    {
        if (! (uiComponent instanceof SelectOneRow))
        {
            return;
        }

        if (!uiComponent.isRendered())
        {
            return;
        }
        SelectOneRow row = (SelectOneRow) uiComponent;

        Map requestMap = context.getExternalContext().getRequestParameterMap();
        String postedValue;

        if (requestMap.containsKey(row.getGroupName()))
        {
            postedValue = (String) requestMap.get(row.getGroupName());
            String clientId = row.getClientId(context);
            if (clientId.equals(postedValue))
            {
                String[] postedValueArray = postedValue.split(":");
                String rowIndex = postedValueArray[postedValueArray.length - 2];

                ValueBinding vb = row.getValueBinding("value");
                Class type = vb.getType(context);
                if (type == null)
                {
                    type = (vb.getValue(context) != null) ? vb.getValue(context).getClass() : null;
                }
                Object newValue = null;
                if (type != null)
                {
                    if (type.isAssignableFrom(Long.class))
                    {
                        newValue = Long.valueOf(rowIndex);
                    }
                    else
                    {
                        newValue = Integer.valueOf(rowIndex);
                    }
                }
                else
                {
                    newValue = Integer.valueOf(rowIndex);
                }
                //the value to go in conversion&validation
                row.setSubmittedValue(newValue);
                row.setValid(true);
            }
        }
    }
}