RELEASE_2_1_13/src/blocks/faces/java/org/apache/cocoon/faces/samples/components/renderkit/BaseRenderer.java

/*
 * $Id$
 */

/*
 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
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 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above
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 *   provided with the distribution.
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 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
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 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
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package org.apache.cocoon.faces.samples.components.renderkit;


import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.render.Renderer;

import java.io.IOException;
import java.util.Iterator;

/**
 * <p>Convenient base class for <code>Renderer</code> implementations.</p>
 */

public abstract class BaseRenderer extends Renderer {

    public static final String BUNDLE_ATTR = "com.sun.faces.bundle";


    public String convertClientId(FacesContext context, String clientId) {
        return clientId;
    }

    /*
     * NOTE: Commented out to remove JSTL dependency.
    protected String getKeyAndLookupInBundle(FacesContext context,
                                             UIComponent component,
                                             String keyAttr)
        throws MissingResourceException {
        String key = null, bundleName = null;
        ResourceBundle bundle = null;

        key = (String) component.getAttributes().get(keyAttr);
        bundleName = (String) component.getAttributes().get(BUNDLE_ATTR);

        // if the bundleName is null for this component, it might have
        // been set on the root component.
        if (bundleName == null) {
            UIComponent root = context.getViewRoot();

            bundleName = (String) root.getAttributes().get(BUNDLE_ATTR);
        }
        // verify our component has the proper attributes for key and bundle.
        if (null == key || null == bundleName) {
            throw new MissingResourceException("Can't load JSTL classes",
                                               bundleName, key);
        }

        // verify the required Class is loadable
        // PENDING(edburns): Find a way to do this once per ServletContext.
        if (null == Thread.currentThread().getContextClassLoader().
            getResource("javax.servlet.jsp.jstl.fmt.LocalizationContext")) {
            Object[] params = {
                "javax.servlet.jsp.jstl.fmt.LocalizationContext"
            };
            throw new MissingResourceException("Can't load JSTL classes",
                                               bundleName, key);
        }

        // verify there is a ResourceBundle in scoped namescape.
        javax.servlet.jsp.jstl.fmt.LocalizationContext locCtx = null;
        if (null == (locCtx = (javax.servlet.jsp.jstl.fmt.LocalizationContext)
            (Util.getValueBinding(bundleName)).getValue(context)) ||
            null == (bundle = locCtx.getResourceBundle())) {
            throw new MissingResourceException("Can't load ResourceBundle ",
                                               bundleName, key);
        }

        return bundle.getString(key);
    }
    */

    protected void encodeRecursive(FacesContext context, UIComponent component)
        throws IOException {

        component.encodeBegin(context);
        if (component.getRendersChildren()) {
            component.encodeChildren(context);
        } else {
            Iterator kids = component.getChildren().iterator();
            while (kids.hasNext()) {
                UIComponent kid = (UIComponent) kids.next();
                encodeRecursive(context, kid);
            }
        }
        component.encodeEnd(context);

    }


}