org.ajax4jsf.component.UISelector.java Source code

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Here is the source code for org.ajax4jsf.component.UISelector.java

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/**
 * License Agreement.
 *
 * Rich Faces - Natural Ajax for Java Server Faces (JSF)
 *
 * Copyright (C) 2007 Exadel, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */

package org.ajax4jsf.component;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;
import java.util.Set;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;

import org.ajax4jsf.component.AjaxDataEncoder;
import org.ajax4jsf.renderkit.AjaxChildrenRenderer;
import org.apache.commons.beanutils.PropertyUtils;

/**
 * Base class for component, performed AJAX encoding on selected values in
 * iterable components ( UIData, trees etc )
 * 
 * @author shura
 * 
 */
public abstract class UISelector extends UIComponentBase implements AjaxDataEncoder {

    private static final AjaxChildrenRenderer childrenRenderer = new AjaxChildrenRenderer() {

        protected Class<? extends UIComponent> getComponentClass() {
            return UISelector.class;
        }

    };

    /**
     * Name of serRow ( or simple ) method for setup current value in iterable
     * component
     * 
     * @parameter
     * @return the acceptClass
     */
    public abstract String getIterationProperty();

    /**
     * @param newSelectMethod
     *            the value to set
     */
    public abstract void setIterationProperty(String newSelectMethod);

    /*
     * (non-Javadoc)
     * 
     * @see org.ajax4jsf.framework.ajax.AjaxChildrenEncoder#encodeAjaxChild(javax.faces.context.FacesContext,
     *      java.lang.String, java.util.Set, java.util.Set)
     */
    public void encodeAjaxChild(FacesContext context, String path, Set<String> ids, Set<String> renderedAreas)
            throws IOException {
        if (getChildCount() != 1) {
            throw new FacesException("Selector component must have one, and only one, child");
        }
        UIComponent child = (UIComponent) getChildren().get(0);
        Set<Object> ajaxKeys = getAjaxKeys();
        if (null != ajaxKeys) {
            String iterationProperty = getIterationProperty();
            try {
                Object savedKey = PropertyUtils.getProperty(child, iterationProperty);
                for (Iterator<Object> iter = ajaxKeys.iterator(); iter.hasNext();) {
                    Object key = (Object) iter.next();
                    PropertyUtils.setProperty(child, iterationProperty, key);
                    if (true) {
                        childrenRenderer.encodeAjaxChildren(context, this, path, ids, renderedAreas);
                    }

                }
                PropertyUtils.setProperty(child, iterationProperty, savedKey);

            } catch (IllegalAccessException e) {
                throw new FacesException("Illegal access to iteration selection property " + iterationProperty
                        + " on component " + child.getClientId(context), e);
            } catch (InvocationTargetException e) {
                throw new FacesException("Error in iteration selection property " + iterationProperty
                        + " on component " + child.getClientId(context), e.getCause());
            } catch (NoSuchMethodException e) {
                throw new FacesException("No iteration selection property " + iterationProperty + " on component "
                        + child.getClientId(context), e);
            }
        }

    }

}